tarantool_1.6.7.588.g76bbd9c/0000775000000000000000000000000012647412762014156 5ustar rootroottarantool_1.6.7.588.g76bbd9c/.gitmodules0000664000000000000000000000115512647412657016340 0ustar rootroot[submodule "third_party/luajit"] path = third_party/luajit url = https://github.com/tarantool/luajit.git [submodule "src/lib/msgpuck"] path = src/lib/msgpuck url = https://github.com/tarantool/msgpuck.git [submodule "third_party/luafun"] path = third_party/luafun url = https://github.com/rtsisyk/luafun.git [submodule "sophia"] path = third_party/sophia url = https://github.com/tarantool/sophia.git branch = tarantool-master [submodule "test-run"] path = test-run url = https://github.com/tarantool/test-run.git [submodule "src/lib/small"] path = src/lib/small url = https://github.com/tarantool/small.git tarantool_1.6.7.588.g76bbd9c/.appveyor.yml0000664000000000000000000000000012634006617016604 0ustar rootroottarantool_1.6.7.588.g76bbd9c/VERSION0000664000000000000000000000002312647412777015227 0ustar rootroot1.6.7-591-g7d4dbbb tarantool_1.6.7.588.g76bbd9c/cmake/0000775000000000000000000000000012635744541015236 5ustar rootroottarantool_1.6.7.588.g76bbd9c/cmake/luatest.cpp0000664000000000000000000000512312634006617017416 0ustar rootroot/* * Copyright 2010-2015, Tarantool AUTHORS, please see AUTHORS file. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * 1. Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Find out LuaJIT behavior on the current platform. * * LuaJIT uses different stack unwinding mechanisms on 32-bit x86 * and 64-bit x86-64 hardware: on a 32-bit system it can use * its own * longjmp-style "internal stack unwinding". * Among other things, this mechanism doesn't support exception * propagation from Lua panic function (lua_atpanic()), and * this is exactly what Tarantool does: throws an exception * in lua_atpanic(). * * Which mechanism to use is determined at library * compile time, by a set of flags * (-fexceptions -funwind-tables -DLUAJIT_UNWIND_EXTERNAL), * hence, when configuring, we can't just check the library file * to find out whether or not it will work. * Instead, we compile and run this test. * * http://lua-users.org/lists/lua-l/2010-04/msg00470.html */ #include #include static int panic = 0; static int lua_panic_cb(lua_State *L) { if (!panic++) throw 0; abort(); return 0; } int main(int argc, char * argv[]) { lua_State *L = luaL_newstate(); if (L == NULL) return 1; lua_atpanic(L, lua_panic_cb); try { lua_pushstring(L, "uncallable"); lua_call(L, 0, LUA_MULTRET); } catch (...) { /* If we're lucky, we should get here. */ } lua_close(L); return 0; } tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibCJSON.cmake0000664000000000000000000000076012634006617020520 0ustar rootroot# # A macro to build the bundled liblua-cjson macro(libcjson_build) set(cjson_src ${PROJECT_SOURCE_DIR}/third_party/lua-cjson/lua_cjson.c ${PROJECT_SOURCE_DIR}/third_party/lua-cjson/strbuf.c) add_library(cjson STATIC ${cjson_src}) set(LIBCJSON_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party/lua-cjson) set(LIBCJSON_LIBRARIES cjson) message(STATUS "Use bundled Lua-CJSON library: ${LIBCJSON_LIBRARIES}") unset(lua_cjson_src) endmacro(libcjson_build) tarantool_1.6.7.588.g76bbd9c/cmake/FindLibEV.cmake0000664000000000000000000000111012634006617017765 0ustar rootrootfind_path(LIBEV_INCLUDE_DIR NAMES ev.h) find_library(LIBEV_LIBRARIES NAMES ev) if(LIBEV_INCLUDE_DIR AND LIBEV_LIBRARIES) set(LIBEV_FOUND ON) endif(LIBEV_INCLUDE_DIR AND LIBEV_LIBRARIES) if(LIBEV_FOUND) if (NOT LIBEV_FIND_QUIETLY) message(STATUS "Found libev includes: ${LIBEV_INCLUDE_DIR}/ev.h") message(STATUS "Found libev library: ${LIBEV_LIBRARIES}") endif (NOT LIBEV_FIND_QUIETLY) else(LIBEV_FOUND) if (LIBEV_FIND_REQUIRED) message(FATAL_ERROR "Could not find libev development files") endif (LIBEV_FIND_REQUIRED) endif (LIBEV_FOUND) tarantool_1.6.7.588.g76bbd9c/cmake/module.cmake0000664000000000000000000000360212634006617017520 0ustar rootroot# A helper function to extract public API function(rebuild_module_api) set (dstfile "${CMAKE_CURRENT_BINARY_DIR}/module.h") set (tmpfile "${dstfile}.new") set (errcodefile "${CMAKE_CURRENT_BINARY_DIR}/errcode.i") set (headers) # Get absolute path for header files (required of out-of-source build) foreach (header ${ARGN}) if (IS_ABSOLUTE ${header}) list(APPEND headers ${header}) else() list(APPEND headers ${CMAKE_CURRENT_SOURCE_DIR}/${header}) endif() endforeach() set (cflags ${CMAKE_C_FLAGS}) separate_arguments(cflags) # Pass sysroot settings on OSX if (NOT "${CMAKE_OSX_SYSROOT}" STREQUAL "") set (cflags ${cflags} ${CMAKE_C_SYSROOT_FLAG} ${CMAKE_OSX_SYSROOT}) endif() add_custom_command(OUTPUT ${dstfile} COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/module_header.h > ${tmpfile} COMMAND cat ${headers} | ${CMAKE_SOURCE_DIR}/extra/apigen >> ${tmpfile} COMMAND ${CMAKE_C_COMPILER} ${cflags} -I ${CMAKE_SOURCE_DIR}/src -I ${CMAKE_BINARY_DIR}/src -E ${CMAKE_SOURCE_DIR}/src/box/errcode.h > ${errcodefile} COMMAND grep "enum box_error_code" ${errcodefile} >> ${tmpfile} COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/module_footer.h >> ${tmpfile} COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmpfile} ${dstfile} COMMAND ${CMAKE_COMMAND} -E remove ${errcodefile} ${tmpfile} DEPENDS ${srcfiles} ${CMAKE_SOURCE_DIR}/src/box/errcode.h ${CMAKE_CURRENT_SOURCE_DIR}/module_header.h ${CMAKE_CURRENT_SOURCE_DIR}/module_footer.h ) add_custom_target(api ALL DEPENDS ${srcfiles} ${dstfile}) install(FILES ${dstfile} DESTINATION ${MODULE_INCLUDEDIR}) endfunction() set_source_files_properties("${CMAKE_CURRENT_BINARY_DIR}/module.h" PROPERTIES GENERATED HEADER_FILE_ONLY) tarantool_1.6.7.588.g76bbd9c/cmake/pod2man.cmake0000664000000000000000000000234212635744541017601 0ustar rootroot# Generate man pages of the project by using the POD header # written in the tool source code. To use it - include this # file in CMakeLists.txt and invoke # pod2man(
) find_program(POD2MAN pod2man) if(NOT POD2MAN) message(STATUS "Could not find pod2man - man pages disabled") endif(NOT POD2MAN) macro(pod2man PODFILE NAME SECTION CENTER) set(PODFILE_FULL "${CMAKE_CURRENT_SOURCE_DIR}/${PODFILE}") set(MANFILE_FULL "${CMAKE_CURRENT_BINARY_DIR}/${NAME}.${SECTION}") if(NOT EXISTS ${PODFILE_FULL}) message(FATAL ERROR "Could not find pod file ${PODFILE_FULL} to generate man page") endif(NOT EXISTS ${PODFILE_FULL}) if(POD2MAN) add_custom_command( OUTPUT ${MANFILE_FULL} COMMAND ${POD2MAN} --section="${SECTION}" --center="${CENTER}" --release --name="${NAME}" "${PODFILE_FULL}" "${MANFILE_FULL}" ) set(MANPAGE_TARGET "man-${NAME}") add_custom_target(${MANPAGE_TARGET} ALL DEPENDS ${MANFILE_FULL} ) install( FILES ${MANFILE_FULL} DESTINATION ${CMAKE_INSTALL_MANDIR}/man${SECTION} ) endif() endmacro(pod2man PODFILE NAME SECTION OUTPATH CENTER) tarantool_1.6.7.588.g76bbd9c/cmake/FindTermcap.cmake0000664000000000000000000000061512634006617020430 0ustar rootroot# find Termcap includes and library # # TERMCAP_FOUND # TERMCAP_LIBRARY # TERMCAP_INCLUDE_DIR FIND_LIBRARY(TERMCAP_LIBRARY NAMES termcap) FIND_PATH(TERMCAP_INCLUDE_DIR NAMES termcap.h) SET (TERMCAP_FOUND FALSE) IF (TERMCAP_LIBRARY) SET (TERMCAP_FOUND TRUE) MESSAGE(STATUS "Found Termcap: ${TERMCAP_LIBRARY}") ENDIF () MARK_AS_ADVANCED( TERMCAP_FOUND TERMCAP_LIBRARY TERMCAP_INCLUDE_DIR ) tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibGOPT.cmake0000664000000000000000000000072712634006617020420 0ustar rootroot# # A macro to build the bundled libgopt macro(libgopt_build) set(gopt_src ${PROJECT_SOURCE_DIR}/third_party/gopt/gopt.c) add_library(gopt STATIC ${gopt_src}) set(LIBGOPT_INCLUDE_DIR ${PROJECT_BINARY_DIR}/third_party/gopt) set(LIBGOPT_LIBRARIES gopt) message(STATUS "Use bundled libgopt includes: ${LIBGOPT_INCLUDE_DIR}/gopt.h") message(STATUS "Use bundled libgopt library: ${LIBGOPT_LIBRARIES}") unset(gopt_src) endmacro(libgopt_build) tarantool_1.6.7.588.g76bbd9c/cmake/FindReadline.cmake0000664000000000000000000000251212634006617020556 0ustar rootroot# - Find the readline include files and libraries # - Include finding of termcap or curses # # READLINE_FOUND # READLINE_INCLUDE_DIR # READLINE_LIBRARIES # include(FindTermcap) if (DEFINED READLINE_ROOT) set(_FIND_OPTS NO_CMAKE NO_CMAKE_SYSTEM_PATH) FIND_LIBRARY(READLINE_READLINE_LIBRARY NAMES readline HINTS ${READLINE_ROOT}/lib ${_FIND_OPTS}) FIND_PATH(READLINE_INCLUDE_DIR NAMES readline/readline.h HINTS ${READLINE_ROOT}/include ${_FIND_OPTS}) else() FIND_LIBRARY(READLINE_READLINE_LIBRARY NAMES readline) FIND_PATH(READLINE_INCLUDE_DIR readline/readline.h) endif() SET(READLINE_FOUND FALSE) IF (READLINE_READLINE_LIBRARY AND READLINE_INCLUDE_DIR) SET (READLINE_FOUND TRUE) SET (READLINE_INCLUDE_DIR ${READLINE_INCLUDE_DIR}) SET (READLINE_LIBRARIES ${READLINE_READLINE_LIBRARY}) IF (EXISTS ${READLINE_INCLUDE_DIR}/readline/rlconf.h) set(HAVE_GNU_READLINE 1) set(libname "GNU readline") ELSE() set(libname "readline") ENDIF () MESSAGE(STATUS "Found ${libname}: ${READLINE_READLINE_LIBRARY}, include dir ${READLINE_INCLUDE_DIR}") IF (TERMCAP_FOUND) SET (READLINE_LIBRARIES ${READLINE_LIBRARIES} ${TERMCAP_LIBRARY}) ENDIF (TERMCAP_FOUND) ENDIF (READLINE_READLINE_LIBRARY AND READLINE_INCLUDE_DIR) MARK_AS_ADVANCED( READLINE_FOUND READLINE_INCLUDE_DIR READLINE_LIBRARIES ) tarantool_1.6.7.588.g76bbd9c/cmake/compiler.cmake0000664000000000000000000002055612634006617020054 0ustar rootroot# # Check if the same compile family is used for both C and CXX # if (NOT (CMAKE_C_COMPILER_ID STREQUAL CMAKE_CXX_COMPILER_ID)) message(WARNING "CMAKE_C_COMPILER_ID (${CMAKE_C_COMPILER_ID}) is different " "from CMAKE_CXX_COMPILER_ID (${CMAKE_CXX_COMPILER_ID})." "The final binary may be unusable.") endif() # We support building with Clang and gcc. First check # what we're using for build. # if (CMAKE_C_COMPILER_ID STREQUAL Clang) set(CMAKE_COMPILER_IS_CLANG ON) set(CMAKE_COMPILER_IS_GNUCC OFF) set(CMAKE_COMPILER_IS_GNUCXX OFF) endif() # # Hard coding the compiler version is ugly from cmake POV, but # at least gives user a friendly error message. The most critical # demand for C++ compiler is support of C++11 lambdas, added # only in version 4.5 https://gcc.gnu.org/projects/cxx0x.html # if (CMAKE_COMPILER_IS_GNUCC) # cmake 2.8.9 and earlier doesn't support CMAKE_CXX_COMPILER_VERSION if (NOT CMAKE_CXX_COMPILER_VERSION) execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE CMAKE_CXX_COMPILER_VERSION) endif() if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.5) message(FATAL_ERROR " Your GCC version is ${CMAKE_CXX_COMPILER_VERSION}, please update ") endif() endif() # # Check supported standards # if((NOT HAVE_STD_C11 AND NOT HAVE_STD_GNU99) OR (NOT HAVE_STD_CXX11 AND NOT HAVE_STD_GNUXX0X)) set(CMAKE_REQUIRED_FLAGS "-std=c11") check_c_source_compiles(" /* * FreeBSD 10 ctype.h header fail to compile on gcc4.8 in c11 mode. * Make sure we aren't affected. */ #include int main(void) { return 0; } " HAVE_STD_C11) set(CMAKE_REQUIRED_FLAGS "-std=gnu99") check_c_source_compiles("int main(void) { return 0; }" HAVE_STD_GNU99) set(CMAKE_REQUIRED_FLAGS "-std=c++11") check_cxx_source_compiles("int main(void) { return 0; }" HAVE_STD_CXX11) set(CMAKE_REQUIRED_FLAGS "-std=gnu++0x") check_cxx_source_compiles("int main(void) { return 0; }" HAVE_STD_GNUXX0X) set(CMAKE_REQUIRED_FLAGS "") endif() if((NOT HAVE_STD_C11 AND NOT HAVE_STD_GNU99) OR (NOT HAVE_STD_CXX11 AND NOT HAVE_STD_GNUXX0X)) message (FATAL_ERROR "${CMAKE_C_COMPILER} should support -std=c11 or -std=gnu99. " "${CMAKE_CXX_COMPILER} should support -std=c++11 or -std=gnu++0x. " "Please consider upgrade to gcc 4.5+ or clang 3.2+.") endif() # # Check for an omp support # set(CMAKE_REQUIRED_FLAGS "-fopenmp -Werror") check_cxx_source_compiles("int main(void) { #pragma omp parallel { } return 0; }" HAVE_OPENMP) set(CMAKE_REQUIRED_FLAGS "") if (NOT HAVE_OPENMP) add_compile_flags("C;CXX" -Wno-unknown-pragmas) endif() # # Perform build type specific configuration. # check_c_compiler_flag("-ggdb" CC_HAS_GGDB) if (CC_HAS_GGDB) set (CC_DEBUG_OPT "-ggdb") endif() set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${CC_DEBUG_OPT} -O0") set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} ${CC_DEBUG_OPT} -O2") set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${CC_DEBUG_OPT} -O0") set (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${CC_DEBUG_OPT} -O2") unset(CC_DEBUG_OPT) # # Set flags for all include files: those maintained by us and # coming from third parties. # We must set -fno-omit-frame-pointer here, since we rely # on frame pointer when getting a backtrace, and it must # be used consistently across all object files. # The same reasoning applies to -fno-stack-protector switch. # Since we began using luajit, which uses gcc stack unwind # internally, we also need to make sure all code is compiled # with unwind info. # # In C a global variable without a storage specifier (static/extern) and # without an initialiser is called a ’tentative definition’. The # language permits multiple tentative definitions in the single # translation unit; i.e. int foo; int foo; is perfectly ok. GNU # toolchain goes even further, allowing multiple tentative definitions # in *different* translation units. Internally, variables introduced via # tentative definitions are implemented as ‘common’ symbols. Linker # permits multiple definitions if they are common symbols, and it picks # one arbitrarily for inclusion in the binary being linked. # # -fno-common forces GNU toolchain to behave in a more # standard-conformant way in respect to tentative definitions and it # prevents common symbols generation. Since we are a cross-platform # project it really makes sense. There are toolchains that don’t # implement GNU style handling of the tentative definitions and there # are platforms lacking proper support for common symbols (osx). # add_compile_flags("C;CXX" "-fno-common" "-fno-omit-frame-pointer" "-fno-stack-protector" "-fexceptions" "-funwind-tables") if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug") # Remove VALGRIND code and assertions in *any* type of release build. add_definitions("-DNDEBUG" "-DNVALGRIND") endif() macro(enable_tnt_compile_flags) # Tarantool code is written in GNU C dialect. # Additionally, compile it with more strict flags than the rest # of the code. # Set standard if (HAVE_STD_C11) add_compile_flags("C" "-std=c11") else() add_compile_flags("C" "-std=gnu99") endif() if (HAVE_STD_CXX11) add_compile_flags("CXX" "-std=c++11") else() add_compile_flags("CXX" "-std=gnu++0x") endif() add_compile_flags("C;CXX" "-Wall" "-Wextra" "-Wno-sign-compare" "-Wno-strict-aliasing" ) if (CMAKE_COMPILER_IS_GNUCXX) # G++ bug. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31488 add_compile_flags("CXX" "-Wno-invalid-offsetof" ) endif() if (CMAKE_COMPILER_IS_GNUCC) # A workaround for Redhat Developer Toolset 2.x on RHEL/CentOS 5.x add_compile_flags("C" "-fno-gnu89-inline") endif() add_definitions("-D__STDC_FORMAT_MACROS=1") add_definitions("-D__STDC_LIMIT_MACROS=1") add_definitions("-D__STDC_CONSTANT_MACROS=1") # Only add -Werror if it's a debug build, done by developers. # Release builds should not cause extra trouble. if ((${CMAKE_BUILD_TYPE} STREQUAL "Debug") AND HAVE_STD_C11 AND HAVE_STD_CXX11) add_compile_flags("C;CXX" "-Werror") endif() endmacro(enable_tnt_compile_flags) if (HAVE_OPENMP) add_compile_flags("C;CXX" "-fopenmp") endif() # # GCC started to warn for unused result starting from 4.2, and # this is when it introduced -Wno-unused-result # GCC can also be built on top of llvm runtime (on mac). # check_c_compiler_flag("-Wno-unused-const-variable" CC_HAS_WNO_UNUSED_CONST_VARIABLE) check_c_compiler_flag("-Wno-unused-result" CC_HAS_WNO_UNUSED_RESULT) check_c_compiler_flag("-Wno-unused-value" CC_HAS_WNO_UNUSED_VALUE) check_c_compiler_flag("-fno-strict-aliasing" CC_HAS_FNO_STRICT_ALIASING) check_c_compiler_flag("-Wno-comment" CC_HAS_WNO_COMMENT) check_c_compiler_flag("-Wno-parentheses" CC_HAS_WNO_PARENTHESES) check_c_compiler_flag("-Wno-undefined-inline" CC_HAS_WNO_UNDEFINED_INLINE) if (CMAKE_COMPILER_IS_CLANG OR CMAKE_COMPILER_IS_GNUCC) set(HAVE_BUILTIN_CTZ 1) set(HAVE_BUILTIN_CTZLL 1) set(HAVE_BUILTIN_CLZ 1) set(HAVE_BUILTIN_CLZLL 1) set(HAVE_BUILTIN_POPCOUNT 1) set(HAVE_BUILTIN_POPCOUNTLL 1) set(HAVE_BUILTIN_BSWAP32 1) set(HAVE_BUILTIN_BSWAP64 1) else() set(HAVE_BUILTIN_CTZ 0) set(HAVE_BUILTIN_CTZLL 0) set(HAVE_BUILTIN_CLZ 0) set(HAVE_BUILTIN_CLZLL 0) set(HAVE_BUILTIN_POPCOUNT 0) set(HAVE_BUILTIN_POPCOUNTLL 0) set(HAVE_BUILTIN_BSWAP32 0) set(HAVE_BUILTIN_BSWAP64 0) endif() if (NOT HAVE_BUILTIN_CTZ OR NOT HAVE_BUILTIN_CTZLL) # Check if -D_GNU_SOURCE has been defined and add this flag to # CMAKE_REQUIRED_DEFINITIONS in order to get check_prototype_definition work get_property(var DIRECTORY PROPERTY COMPILE_DEFINITIONS) list(FIND var "_GNU_SOURCE" var) if (NOT var EQUAL -1) set(CMAKE_REQUIRED_FLAGS "-Wno-error") set(CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE") check_c_source_compiles("#include \n#include \nint main(void) { return ffsl(0L); }" HAVE_FFSL) check_c_source_compiles("#include \n#include \nint main(void) { return ffsll(0UL); }" HAVE_FFSLL) endif() endif() tarantool_1.6.7.588.g76bbd9c/cmake/thread.cmake0000664000000000000000000000261612634006617017506 0ustar rootroot# # Doing it in a function to avoid polluting the toplevel namespace function (do_pthread_checks) check_include_file(pthread_np.h HAVE_PTHREAD_NP_H) if (HAVE_PTHREAD_NP_H) set(INCLUDE_MISC_PTHREAD_HEADERS "#include ") endif () set(CMAKE_REQUIRED_FLAGS -pedantic-errors) set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE -D_DARWIN_C_SOURCE) set(CMAKE_REQUIRED_LIBRARIES pthread) # pthread_setname_np(, ) - Linux check_c_source_compiles(" #include ${INCLUDE_MISC_PTHREAD_HEADERS} int main() { pthread_setname_np(pthread_self(), \"\"); } " HAVE_PTHREAD_SETNAME_NP) # pthread_setname_np() - OSX check_c_source_compiles(" #include ${INCLUDE_MISC_PTHREAD_HEADERS} int main() { pthread_setname_np(\"\"); } " HAVE_PTHREAD_SETNAME_NP_1) # pthread_set_name_np(, ) - *BSD check_c_source_compiles(" #include ${INCLUDE_MISC_PTHREAD_HEADERS} int main() { pthread_set_name_np(pthread_self(), \"\"); } " HAVE_PTHREAD_SET_NAME_NP) if (NOT (HAVE_PTHREAD_SETNAME_NP OR HAVE_PTHREAD_SETNAME_NP_1 OR HAVE_PTHREAD_SET_NAME_NP)) message(FATAL_ERROR "No suitable function for setting thread names found") endif () endfunction (do_pthread_checks) do_pthread_checks() tarantool_1.6.7.588.g76bbd9c/cmake/FindLibYAML.cmake0000664000000000000000000000065212634747304020234 0ustar rootrootfind_path(LIBYAML_INCLUDE_DIR NAMES yaml.h ) find_library(LIBYAML_LIBRARY NAMES yaml ) set(LIBYAML_INCLUDE_DIRS "${LIBYAML_INCLUDE_DIR}") set(LIBYAML_LIBRARIES "${LIBYAML_LIBRARY}") include(FindPackageHandleStandardArgs) find_package_handle_standard_args(LibYAML REQUIRED_VARS LIBYAML_LIBRARIES LIBYAML_INCLUDE_DIRS) mark_as_advanced(LIBYAML_LIBRARY LIBYAML_LIBRARIES LIBYAML_INCLUDE_DIR LIBYAML_INCLUDE_DIRS) tarantool_1.6.7.588.g76bbd9c/cmake/arch.cmake0000664000000000000000000000202212634006617017143 0ustar rootroottest_big_endian(HAVE_BYTE_ORDER_BIG_ENDIAN) # # We do not perform host-to-network byte order translation, # and simply assume the machine is little-endian. # We also do not bother with trying to avoid unaligned # word access. Refuse to compile on rare hardware such as # Sparc or Itanium. # if (${HAVE_BYTE_ORDER_BIG_ENDIAN} OR ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "sparc" OR ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "ia64" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "^alpha") message (FATAL_ERROR "Unsupported architecture -- ${CMAKE_SYSTEM_PROCESSOR}, ") message (FATAL_ERROR "Tarantool currently only supports little-endian hardware") message (FATAL_ERROR "with unaligned word access.") endif() # # Bug in CMake, Darwin always detect on i386 # Fixed with check types # if (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin") if (CMAKE_SIZEOF_VOID_P MATCHES 8) set(CMAKE_SYSTEM_PROCESSOR "x86_64") else(CMAKE_SIZEOF_VOID_P MATCHES 8) set(CMAKE_SYSTEM_PROCESSOR "x86") endif(CMAKE_SIZEOF_VOID_P MATCHES 8) endif() tarantool_1.6.7.588.g76bbd9c/cmake/utils.cmake0000664000000000000000000000655212634006617017402 0ustar rootrootmacro(add_compile_flags langs) foreach(_lang ${langs}) string (REPLACE ";" " " _flags "${ARGN}") set ("CMAKE_${_lang}_FLAGS" "${CMAKE_${_lang}_FLAGS} ${_flags}") unset (${_lang}) unset (${_flags}) endforeach() endmacro(add_compile_flags) macro(set_source_files_compile_flags) foreach(file ${ARGN}) get_filename_component(_file_ext ${file} EXT) set(_lang "") if ("${_file_ext}" STREQUAL ".m") set(_lang OBJC) # CMake believes that Objective C is a flavor of C++, not C, # and uses g++ compiler for .m files. # LANGUAGE property forces CMake to use CC for ${file} set_source_files_properties(${file} PROPERTIES LANGUAGE C) elseif("${_file_ext}" STREQUAL ".mm") set(_lang OBJCXX) endif() if (_lang) get_source_file_property(_flags ${file} COMPILE_FLAGS) if ("${_flags}" STREQUAL "NOTFOUND") set(_flags "${CMAKE_${_lang}_FLAGS}") else() set(_flags "${_flags} ${CMAKE_${_lang}_FLAGS}") endif() # message(STATUS "Set (${file} ${_flags}") set_source_files_properties(${file} PROPERTIES COMPILE_FLAGS "${_flags}") endif() endforeach() unset(_file_ext) unset(_lang) endmacro(set_source_files_compile_flags) # A helper function to compile *.lua source into *.lua.c sources function(lua_source varname filename) if (IS_ABSOLUTE "${filename}") set (srcfile "${filename}") set (tmpfile "${filename}.new.c") set (dstfile "${filename}.c") else(IS_ABSOLUTE "${filename}") set (srcfile "${CMAKE_CURRENT_SOURCE_DIR}/${filename}") set (tmpfile "${CMAKE_CURRENT_BINARY_DIR}/${filename}.new.c") set (dstfile "${CMAKE_CURRENT_BINARY_DIR}/${filename}.c") endif(IS_ABSOLUTE "${filename}") get_filename_component(module ${filename} NAME_WE) get_filename_component(_name ${dstfile} NAME) string(REGEX REPLACE "${_name}$" "" dstdir ${dstfile}) if (IS_DIRECTORY ${dstdir}) else() file(MAKE_DIRECTORY ${dstdir}) endif() ADD_CUSTOM_COMMAND(OUTPUT ${dstfile} COMMAND ${ECHO} 'const char ${module}_lua[] =' > ${tmpfile} COMMAND ${CMAKE_BINARY_DIR}/extra/txt2c ${srcfile} >> ${tmpfile} COMMAND ${ECHO} '\;' >> ${tmpfile} COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmpfile} ${dstfile} COMMAND ${CMAKE_COMMAND} -E remove ${tmpfile} DEPENDS ${srcfile} txt2c libluajit) set(var ${${varname}}) set(${varname} ${var} ${dstfile} PARENT_SCOPE) endfunction() function(bin_source varname srcfile dstfile) set(var ${${varname}}) set(${varname} ${var} ${dstfile} PARENT_SCOPE) set (srcfile "${CMAKE_CURRENT_SOURCE_DIR}/${srcfile}") set (dstfile "${CMAKE_CURRENT_SOURCE_DIR}/${dstfile}") set (tmpfile "${dstfile}.tmp") get_filename_component(module ${dstfile} NAME_WE) ADD_CUSTOM_COMMAND(OUTPUT ${dstfile} COMMAND ${ECHO} 'const unsigned char ${module}_bin[] = {' > ${tmpfile} COMMAND ${CMAKE_BINARY_DIR}/extra/bin2c "${srcfile}" >> ${tmpfile} COMMAND ${ECHO} '}\;' >> ${tmpfile} COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmpfile} ${dstfile} COMMAND ${CMAKE_COMMAND} -E remove ${tmpfile} DEPENDS ${srcfile} bin2c) endfunction() tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibEV.cmake0000664000000000000000000000437312634006617020162 0ustar rootroot# # A macro to build the bundled libev macro(libev_build) set(ev_compile_flags) set(ev_link_libraries) # There are warnings in libev code which are impossible to selectively # turn off, see # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45977 # http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#COMPILER_WARNINGS # while this stand off is going on, the world is not a very happy # place: set(ev_compile_flags "${ev_compile_flags} -w") # if (CC_HAS_WNO_UNUSED_RESULT) # set(ev_compile_flags "${ev_compile_flags} -Wno-unused-value") # endif() # if (CC_HAS_WNO_COMMENT) # set(ev_compile_flags "${ev_compile_flags} -Wno-comment") # endif() # if (CC_HAS_FNO_STRICT_ALIASING) # set(ev_compile_flags "${ev_compile_flags} -fno-strict-aliasing") # endif() # if (CC_HAS_WNO_PARENTHESES) # set(ev_compile_flags "${ev_compile_flags} -Wno-parentheses") # endif() set(ev_compile_flags "${ev_compile_flags} -DENABLE_BUNDLED_LIBEV=1") if (TARGET_OS_LINUX) # # Enable Linux-specific event notification API (man inotify) set(ev_compile_flags "${ev_compile_flags} -DEV_USE_INOTIFY") set(ev_compile_flags "${ev_compile_flags} -DEV_USE_EVENTFD") set(ev_compile_flags "${ev_compile_flags} -DEV_USE_SIGNALFD") elseif (TARGET_OS_FREEBSD OR TARGET_OS_DARWIN) # # On FreeBSD build libev loop on top of set(ev_compile_flags "${ev_compile_flags} -DEV_USE_KQUEUE") endif() list(APPEND ev_link_libraries "m") if (TARGET_OS_DEBIAN_FREEBSD) # libev depends on librt under kFreeBSD list(APPEND ev_link_libraries "rt") else() endif() set(libev_src ${PROJECT_SOURCE_DIR}/third_party/tarantool_ev.c ) add_library(ev STATIC ${libev_src}) set_target_properties(ev PROPERTIES COMPILE_FLAGS "${ev_compile_flags}") target_link_libraries(ev ${ev_link_libraries}) set(LIBEV_INCLUDE_DIR ${PROJECT_BINARY_DIR}/third_party) set(LIBEV_LIBRARIES ev) message(STATUS "Use bundled libev includes: " "${LIBEV_INCLUDE_DIR}/tarantool_ev.h") message(STATUS "Use bundled libev library: " "${LIBEV_LIBRARIES}") unset(ev_src) unset(ev_compile_flags) unset(ev_link_libraries) endmacro(libev_build) tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibYAML.cmake0000664000000000000000000000166212634747304020415 0ustar rootroot# # A macro to build the bundled libyaml macro(libyaml_build) set(yaml_src ${PROJECT_SOURCE_DIR}/third_party/libyaml/api.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/dumper.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/emitter.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/loader.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/parser.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/reader.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/scanner.c ${PROJECT_SOURCE_DIR}/third_party/libyaml/writer.c) add_library(yaml STATIC ${yaml_src}) set(LIBYAML_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party/libyaml) set(LIBYAML_LIBRARIES yaml) # A workaround for config.h set_target_properties(yaml PROPERTIES COMPILE_DEFINITIONS "HAVE_CONFIG_H") include_directories(${LIBYAML_INCLUDE_DIR}) message(STATUS "Use bundled libyaml library") unset(yaml_src) endmacro(libyaml_build) tarantool_1.6.7.588.g76bbd9c/cmake/luajit.cmake0000664000000000000000000002012312634006617017520 0ustar rootroot # # LuaJIT configuration file. # # A copy of LuaJIT is maintained within Tarantool # source. It's located in third_party/luajit. # # Instead of this copy, Tarantool can be compiled # with a system-wide LuaJIT, or LuaJIT at a given # prefix. This is used when compiling Tarantool # as part of a distribution, e.g. Debian. # # To explicitly request use of the bundled LuaJIT, # add -DENABLE_BUNDLED_LUAJIT=True to CMake # configuration flags. # To explicitly request use of LuaJIT at a given # prefix, use -DLUAJIT_PREFIX=/path/to/LuaJIT. # # These two options are incompatible with each other. # # If neither of the two options is given, this script # first attempts to use the system-installed LuaJIT # and, in case it is not present or can not be used, # falls back to the bundled one. # # Adds CMake options: ENABLED_BUNDLED_LUAJIT, LUAJIT_PREFIX # Exports CMake defines: LUAJIT_PREFIX, LUAJIT_INCLUDE, LUAJIT_LIB # Modifies CMAKE_CFLAGS with -I${LUAJIT_INCLUDE} # # # Bundled LuaJIT paths. # set (LUAJIT_BUNDLED_PREFIX "${PROJECT_BINARY_DIR}/third_party/luajit/src") set (LUAJIT_BUNDLED_LIB "${LUAJIT_BUNDLED_PREFIX}/libluajit.a") macro (luajit_use_bundled) set (LUAJIT_PREFIX "${LUAJIT_BUNDLED_PREFIX}") set (LUAJIT_INCLUDE "${PROJECT_SOURCE_DIR}/third_party/luajit/src") set (LUAJIT_LIB "${LUAJIT_BUNDLED_LIB}") set (ENABLE_BUNDLED_LUAJIT True) endmacro() # # LuaJIT testing routine # (see cmake/luatest.cpp for a description). # macro (luajit_test) file (READ "${CMAKE_SOURCE_DIR}/cmake/luatest.cpp" LUAJIT_TEST) set (CMAKE_REQUIRED_LIBRARIES "${LUAJIT_LIB}") if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux") set (CMAKE_REQUIRED_LIBRARIES "-ldl ${CMAKE_REQUIRED_LIBRARIES}") endif() set (CMAKE_REQUIRED_INCLUDES "${LUAJIT_INCLUDE}") CHECK_CXX_SOURCE_RUNS ("${LUAJIT_TEST}" LUAJIT_RUNS) unset (LUAJIT_TEST) unset (CMAKE_REQUIRED_LIBRARIES) unset (CMAKE_REQUIRED_INCLUDES) endmacro() # # Check if there is a system LuaJIT availaible and # usable with the server (determined by a compiled test). # macro (luajit_try_system) find_path (LUAJIT_INCLUDE lj_obj.h PATH_SUFFIXES luajit-2.0 luajit) find_library (LUAJIT_LIB NAMES luajit luajit-5.1 PATH_SUFFIXES x86_64-linux-gnu) if (LUAJIT_INCLUDE AND LUAJIT_LIB) message (STATUS "include: ${LUAJIT_INCLUDE}, lib: ${LUAJIT_LIB}") message (STATUS "Found a system-wide LuaJIT.") luajit_test() if ("${LUAJIT_RUNS}" STREQUAL "1") message (STATUS "System-wide LuaJIT at ${LUAJIT_LIB} is suitable for use.") else() message (WARNING "System-wide LuaJIT at ${LUAJIT_LIB} is NOT suitable for use, using the bundled one.") luajit_use_bundled() endif() else() message (FATAL_ERROR "Not found a system LuaJIT") #luajit_use_bundled() endif() endmacro() # # Check if there is a usable LuaJIT at the given prefix path. # macro (luajit_try_prefix) find_path (LUAJIT_INCLUDE "lua.h" ${LUAJIT_PREFIX} NO_DEFAULT_PATH) find_library (LUAJIT_LIB "luajit" ${LUAJIT_PREFIX} NO_DEFAULT_PATH) if (LUAJIT_INCLUDE AND LUAJIT_LIB) include_directories("${LUAJIT_INCLUDE}") luajit_test() if (LUAJIT_RUNS) message (STATUS "LuaJIT at ${LUAJIT_PREFIX} is suitable for use.") else() message (FATAL_ERROR "LuaJIT at ${LUAJIT_PREFIX} is NOT suitable for use.") endif() else() message (FATAL_ERROR "Couldn't find LuaJIT in '${LUAJIT_PREFIX}'") endif() endmacro() # # LuaJIT options. # option(ENABLE_BUNDLED_LUAJIT "Enable building of the bundled LuaJIT" ON) option(LUAJIT_PREFIX "Build with LuaJIT at the given path" "") if (LUAJIT_PREFIX AND ENABLE_BUNDLED_LUAJIT) message (FATAL_ERROR "Options LUAJIT_PREFIX and ENABLE_BUNDLED_LUAJIT " "are not compatible with each other.") endif() if (LUAJIT_PREFIX) # trying to build with specified LuaJIT. luajit_try_prefix() elseif (NOT ENABLE_BUNDLED_LUAJIT) # trying to build with system LuaJIT, macro can turn on # building of LuaJIT bundled with the server source. luajit_try_system() else() luajit_use_bundled() endif() unset (LUAJIT_RUNS) include_directories("${LUAJIT_INCLUDE}") message (STATUS "Use LuaJIT includes: ${LUAJIT_INCLUDE}") message (STATUS "Use LuaJIT library: ${LUAJIT_LIB}") macro(luajit_build) set (luajit_cc ${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}) # Cmake rules concerning strings and lists of strings are weird. # set (foo "1 2 3") defines a string, while # set (foo 1 2 3) defines a list. # Use separate_arguments() to turn a string into a list (splits at ws). # It appears that variable expansion rules are context-dependent. # With the current arrangement add_custom_command() # does the right thing. We can even handle pathnames with # spaces though a path with an embeded semicolon or a quotation mark # will most certainly wreak havok. # # This stuff is extremely fragile, proceed with caution. set (luajit_cflags ${CMAKE_C_FLAGS}) separate_arguments(luajit_cflags) set (luajut_ldflags ${CMAKE_STATIC_LINKER_FLAGS}) separate_arguments(luajit_ldflags) if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "86|amd64") # Use external unwind on x86 set (luajit_xcflags "-DLUAJIT_UNWIND_EXTERNAL=1") endif() # We are consciously ommiting debug info in RelWithDebInfo mode if (${CMAKE_BUILD_TYPE} STREQUAL "Debug") set (luajit_ccopt -O0) if (CC_HAS_GGDB) set (luajit_ccdebug -g -ggdb) else () set (luajit_ccdebug -g) endif () set (luajit_xcflags ${luajit_xcflags} -DLUA_USE_APICHECK -DLUA_USE_ASSERT) else () set (luajit_ccopt -O2) set (luajit_ccdbebug "") endif() # Pass sysroot settings on OSX if (NOT "${CMAKE_OSX_SYSROOT}" STREQUAL "") set (luajit_cflags ${luajit_cflags} ${CMAKE_C_SYSROOT_FLAG} ${CMAKE_OSX_SYSROOT}) set (luajit_ldflags ${luajit_ldlags} ${CMAKE_C_SYSROOT_FLAG} ${CMAKE_OSX_SYSROOT}) endif() if (ENABLE_VALGRIND) set (luajit_xcflags ${luajit_xcflags} -DLUAJIT_USE_VALGRIND -DLUAJIT_USE_SYSMALLOC) endif() set (luajit_buildoptions BUILDMODE=static CC="${luajit_cc}" CFLAGS="${luajit_cflags}" LDFLAGS="${luajit_ldflags}" CCOPT="${luajit_ccopt}" CCDEBUG="${luajit_ccdebug}" XCFLAGS="${luajit_xcflags}" Q='') if (${PROJECT_BINARY_DIR} STREQUAL ${PROJECT_SOURCE_DIR}) add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/luajit/src/libluajit.a WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/third_party/luajit COMMAND $(MAKE) ${luajit_buildoptions} clean COMMAND $(MAKE) -C src ${luajit_buildoptions} DEPENDS ${CMAKE_SOURCE_DIR}/CMakeCache.txt ) else() add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/luajit COMMAND ${CMAKE_COMMAND} -E make_directory "${PROJECT_BINARY_DIR}/third_party/luajit" ) add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/luajit/src/libluajit.a WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/third_party/luajit COMMAND ${CMAKE_COMMAND} -E copy_directory ${PROJECT_SOURCE_DIR}/third_party/luajit ${PROJECT_BINARY_DIR}/third_party/luajit COMMAND $(MAKE) ${luajit_buildoptions} clean COMMAND $(MAKE) -C src ${luajit_buildoptions} DEPENDS ${PROJECT_BINARY_DIR}/CMakeCache.txt ${PROJECT_BINARY_DIR}/third_party/luajit ) endif() add_custom_target(libluajit DEPENDS ${PROJECT_BINARY_DIR}/third_party/luajit/src/libluajit.a ) add_dependencies(build_bundled_libs libluajit) unset (luajit_buildoptions) set (inc ${PROJECT_SOURCE_DIR}/third_party/luajit/src) install (FILES ${inc}/lua.h ${inc}/lualib.h ${inc}/lauxlib.h ${inc}/luaconf.h ${inc}/lua.hpp ${inc}/luajit.h DESTINATION ${MODULE_INCLUDEDIR}) endmacro() # # Building shipped luajit only if there is no # usable system one (see cmake/luajit.cmake) or by demand. # if (ENABLE_BUNDLED_LUAJIT) luajit_build() endif() tarantool_1.6.7.588.g76bbd9c/cmake/simd.cmake0000664000000000000000000000301512634006617017165 0ustar rootrootif (NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|^i[3-9]86$") return() endif() # # Check compiler for SSE2 intrinsics # if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG ) set(CMAKE_REQUIRED_FLAGS "-msse2") check_c_source_runs(" #include int main() { __m128i a = _mm_setzero_si128(); return 0; }" CC_HAS_SSE2_INTRINSICS) endif() # # Check compiler for AVX intrinsics # if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG ) set(CMAKE_REQUIRED_FLAGS "-mavx") check_c_source_runs(" #include int main() { __m256i a = _mm256_setzero_si256(); return 0; }" CC_HAS_AVX_INTRINSICS) endif() if ((CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64") AND CC_HAS_SSE2_INTRINSICS) # any amd64 supports sse2 instructions set(ENABLE_SSE2_DEFAULT ON) else() set(ENABLE_SSE2_DEFAULT OFF) endif() option(ENABLE_SSE2 "Enable compile-time SSE2 support." ${ENABLE_SSE2_DEFAULT}) option(ENABLE_AVX "Enable compile-time AVX support." OFF) if (ENABLE_SSE2) if (!CC_HAS_SSE2_INTRINSICS) message( SEND_ERROR "SSE2 is enabled, but is not supported by compiler.") else() add_compile_flags("C;CXX" "-msse2") message(STATUS "SSE2 is enabled - target CPU must support it") endif() endif() if (ENABLE_AVX) if (!CC_HAS_AVX_INTRINSICS) message(SEND_ERROR "AVX is enabled") else() add_compile_flags("C;CXX" "-mavx") message(STATUS "AVX is enabled - target CPU must support it") endif() endif() tarantool_1.6.7.588.g76bbd9c/cmake/package.cmake0000664000000000000000000000404712634006617017632 0ustar rootroot # # List generators # set (CPACK_GENERATOR "TGZ") set (CPACK_SOURCE_GENERATOR "TGZ") # # Ignoring generated files # set (CPACK_SOURCE_IGNORE_FILES "\\\\.git" "_CPack_Packages" "CMakeCache.txt" "CPackSourceConfig.cmake" "CPackConfig.cmake" "CMakeFiles" "\\\\.gz" "\\\\.Z" "\\\\.zip" "x86_64\\\\.rpm" "i386\\\\.rpm" "i686\\\\.rpm" "\\\\.o" "\\\\.so" "\\\\.a" "src/tarantool$" "src/00000000000000000001.snap" "install_manifest.txt" "cmake_install.cmake" "test/var/" ) set (CPACK_SOURCE_IGNORE_FILES "${CPACK_SOURCE_IGNORE_FILES}" "${CMAKE_SOURCE_DIR}/Makefile" "${CMAKE_SOURCE_DIR}/test/Makefile" "${CMAKE_SOURCE_DIR}/test/lib/Makefile" "${CMAKE_SOURCE_DIR}/src/Makefile" "${CMAKE_SOURCE_DIR}/src/box/Makefile" "${CMAKE_SOURCE_DIR}/src/lib/Makefile" "${CMAKE_SOURCE_DIR}/src/trivia/config.h$" "${CMAKE_SOURCE_DIR}/src/Makefile" "${CMAKE_SOURCE_DIR}/extra/Makefile" "${CMAKE_SOURCE_DIR}/doc/Makefile" "${CMAKE_SOURCE_DIR}/doc/user/Makefile" "${CMAKE_SOURCE_DIR}/doc/developer/Makefile" "${CMAKE_SOURCE_DIR}/doc/man/Makefile" ) set (CPACK_SOURCE_PACKAGE_FILE_NAME "tarantool-${PACKAGE_VERSION}-src") # # Provide options for the binary distribution. # string (TOLOWER "${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_PROCESSOR}" platform) set (CPACK_PACKAGE_FILE_NAME "tarantool-${PACKAGE_VERSION}-${platform}") if (${CMAKE_BUILD_TYPE} STREQUAL "Debug") set (CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_FILE_NAME}-debug") endif() if (${TARGET_OS_DARWIN}) set (CPACK_GENERATOR "PackageMaker") set (CPACK_SOURCE_GENERATOR "PackageMaker") set (CPACK_PACKAGE_VENDOR "tarantool") set (CPACK_PACKAGING_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX}) set (CPACK_POSTFLIGHT_SCRIPT "${CMAKE_BINARY_DIR}/extra/postflight") set (CPACK_RESOURCE_FILE_WELCOME "${PROJECT_SOURCE_DIR}/extra/dmg/DESCRIPTION.rtf") set (CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/extra/dmg/README.rtf") set (CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/extra/dmg/LICENSE.rtf") endif() ## include (CPack) tarantool_1.6.7.588.g76bbd9c/cmake/os.cmake0000664000000000000000000000300112634006617016645 0ustar rootroot# # Perform operating-system specific configuration. # if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux") set(TARGET_OS_LINUX 1) # # Enable GNU glibc extentions. add_definitions("-D_GNU_SOURCE") # # On 32-bit systems, support files larger than 2GB # (see man page for feature_test_macros). add_definitions("-D_FILE_OFFSET_BITS=64") message(STATUS "Building for Linux") elseif (${CMAKE_SYSTEM_NAME} STREQUAL "kFreeBSD") set(TARGET_OS_FREEBSD 1) set(TARGET_OS_DEBIAN_FREEBSD 1) # Debian/kFreeBSD uses GNU glibc. add_definitions("-D_GNU_SOURCE") add_definitions("-D_FILE_OFFSET_BITS=64") message(STATUS "Building for Debian/kFreeBSD") elseif (${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD") set(TARGET_OS_FREEBSD 1) message(STATUS "Building for FreeBSD") elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin") set(TARGET_OS_DARWIN 1) # # Default build type is None, which uses depends by Apple # command line tools. Also supportting install with MacPorts. # if (NOT DARWIN_BUILD_TYPE) set(DARWIN_BUILD_TYPE None CACHE STRING "Choose the type of Darwin build, options are: None, Ports." FORCE) endif() if (${DARWIN_BUILD_TYPE} STREQUAL "Ports") # Mac ports get installed into /opt/local, hence: include_directories("/opt/local/include") set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/opt/local/lib") endif() message(STATUS "Building for Mac OS X") else() message (FATAL_ERROR "Unsupported platform -- ${CMAKE_SYSTEM_NAME}") endif() tarantool_1.6.7.588.g76bbd9c/cmake/systemd.cmake0000664000000000000000000000201312634006617017716 0ustar rootrootfind_package(PkgConfig QUIET) if (PKG_CONFIG_FOUND) pkg_check_modules(SYSTEMD "systemd") if (SYSTEMD_FOUND AND "${SYSTEMD_SERVICES_INSTALL_DIR}" STREQUAL "") execute_process(COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=systemdsystemunitdir systemd OUTPUT_VARIABLE SYSTEMD_SERVICES_INSTALL_DIR) string(REGEX REPLACE "[ \t\n]+" "" SYSTEMD_SERVICES_INSTALL_DIR "${SYSTEMD_SERVICES_INSTALL_DIR}") elseif (NOT SYSTEMD_FOUND AND SYSTEMD_SERVICES_INSTALL_DIR) message (FATAL_ERROR "Variable SYSTEMD_SERVICES_INSTALL_DIR is\ defined, but we can't find systemd using pkg-config") endif() if (SYSTEMD_FOUND) set(WITH_SYSTEMD "ON") message(STATUS "SYSTEMD_SERVICES_INSTALL_DIR: ${SYSTEMD_SERVICES_INSTALL_DIR}") else() set(WITH_SYSTEMD "OFF") endif (SYSTEMD_FOUND) else(PKG_CONFIG_FOUND) set(WITH_SYSTEMD "OFF") endif(PKG_CONFIG_FOUND) file(APPEND "${_OptionalPackagesFile}" "-- WITH_SYSTEMD=${WITH_SYSTEMD}\n") tarantool_1.6.7.588.g76bbd9c/cmake/profile.cmake0000664000000000000000000000263012634006617017673 0ustar rootrootcheck_library_exists (gcov __gcov_flush "" HAVE_GCOV) set(ENABLE_GCOV_DEFAULT OFF) option(ENABLE_GCOV "Enable integration with gcov, a code coverage program" ${ENABLE_GCOV_DEFAULT}) if (ENABLE_GCOV) if (NOT HAVE_GCOV) message (FATAL_ERROR "ENABLE_GCOV option requested but gcov library is not found") endif() add_compile_flags("C;CXX" "-fprofile-arcs" "-ftest-coverage" ) set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs") set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -ftest-coverage") set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fprofile-arcs") set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -ftest-coverage") # add_library(gcov SHARED IMPORTED) endif() if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug") set(ENABLE_GPROF_DEFAULT ON) else() set(ENABLE_GPROF_DEFAULT OFF) endif() option(ENABLE_GPROF "Enable integration with gprof, a performance analyzing tool" ${GPROF_DEFAULT}) if (ENABLE_GPROF) add_compile_flags("C;CXX" "-pg") endif() option(ENABLE_VALGRIND "Enable integration with valgrind, a memory analyzing tool" OFF) if (ENABLE_VALGRIND) check_include_file(valgrind/valgrind.h HAVE_VALGRIND_VALGRIND_H) if (NOT HAVE_VALGRIND_VALGRIND_H) message (FATAL_ERROR "ENABLE_VALGRIND option is set but valgrind/valgrind.h is not found") endif() endif() tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibCORO.cmake0000664000000000000000000000074312634006617020407 0ustar rootroot# # A macro to build the bundled libcoro macro(libcoro_build) set(coro_src ${PROJECT_SOURCE_DIR}/third_party/coro/coro.c ) add_library(coro STATIC ${coro_src}) set(LIBCORO_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party/coro) set(LIBCORO_LIBRARIES coro) message(STATUS "Use bundled libcoro includes: ${LIBCORO_INCLUDE_DIR}/coro.h") message(STATUS "Use bundled libcoro library: ${LIBCORO_LIBRARIES}") unset(coro_src) endmacro(libcoro_build) tarantool_1.6.7.588.g76bbd9c/cmake/FindSphinx.cmake0000664000000000000000000000037612634006617020312 0ustar rootrootinclude(FindPackageHandleStandardArgs) find_program(SPHINX_EXECUTABLE NAMES sphinx-build HINTS $ENV{SPHINX_DIR} PATH_SUFFIXES bin ) find_package_handle_standard_args(Sphinx DEFAULT_MSG SPHINX_EXECUTABLE) mark_as_advanced(SPHINX_EXECUTABLE) tarantool_1.6.7.588.g76bbd9c/cmake/BuildLibEIO.cmake0000664000000000000000000000215312634006617020256 0ustar rootroot# # A macro to build the bundled libeio macro(libeio_build) set(eio_compile_flags) set(eio_compile_flags "${eio_compile_flags} -Wno-unused-result") set(eio_compile_flags "${eio_compile_flags} -Wno-dangling-else") set(eio_compile_flags "${eio_compile_flags} -Wno-unused-value") set(eio_compile_flags "${eio_compile_flags} -DENABLE_BUNDLED_LIBEIO=1") set(eio_compile_flags "${eio_compile_flags} -DEIO_STACKSIZE=0") if (TARGET_OS_LINUX) set(eio_compile_flags "${eio_compile_flags} -DHAVE_SYS_PRCTL_H -DHAVE_PRCTL_SET_NAME") endif () set(eio_src ${PROJECT_SOURCE_DIR}/third_party/tarantool_eio.c ) add_library(eio STATIC ${eio_src}) set_target_properties(eio PROPERTIES COMPILE_FLAGS "${eio_compile_flags}") set(LIBEIO_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party) set(LIBEIO_LIBRARIES eio) message(STATUS "Use bundled libeio includes: " "${LIBEIO_INCLUDE_DIR}/tarantool_eio.h") message(STATUS "Use bundled libeio library: " "${LIBEIO_LIBRARIES}") unset(eio_src) unset(eio_compile_flags) endmacro(libeio_build) tarantool_1.6.7.588.g76bbd9c/cmake/BuildMisc.cmake0000664000000000000000000000221012634006617020100 0ustar rootroot# # A macro to build the bundled libmisc macro(libmisc_build) set(misc_src ${PROJECT_SOURCE_DIR}/third_party/crc32.c ${PROJECT_SOURCE_DIR}/third_party/sha1.c ${PROJECT_SOURCE_DIR}/third_party/PMurHash.c ${PROJECT_SOURCE_DIR}/third_party/base64.c ) if (NOT HAVE_MEMMEM) list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/memmem.c ) endif() if (NOT HAVE_MEMRCHR) list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/memrchr.c ) endif() if (NOT HAVE_OPEN_MEMSTREAM) list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/open_memstream.c ) endif() if (NOT HAVE_CLOCK_GETTIME) list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/clock_gettime.c ) endif() if (HAVE_OPENMP) list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/qsort_arg_mt.c) else() list(APPEND misc_src ${PROJECT_SOURCE_DIR}/third_party/qsort_arg.c) endif() add_library(misc STATIC ${misc_src}) unset(misc_src) endmacro(libmisc_build) tarantool_1.6.7.588.g76bbd9c/cmake/rpm.cmake0000664000000000000000000000725012634006617017034 0ustar rootrootfind_program(RPMBUILD rpmbuild) if (RPMBUILD) find_program(MKDIR mkdir) find_program(CP cp) find_program(WC wc) execute_process (COMMAND ${GIT} describe HEAD --abbrev=0 OUTPUT_VARIABLE VERSION OUTPUT_STRIP_TRAILING_WHITESPACE) execute_process (COMMAND ${GIT} rev-list --oneline ${VERSION}.. COMMAND ${WC} -l OUTPUT_VARIABLE RELEASE OUTPUT_STRIP_TRAILING_WHITESPACE) set (SCL_VERSION "1.0" CACHE STRING "" FORCE) set (SCL_RELEASE "1" CACHE STRING "" FORCE) set (SCL_TARANTOOL "mailru-16" CACHE STRING "" FORCE) set (RPM_PACKAGE_VERSION ${VERSION} CACHE STRING "" FORCE) set (RPM_PACKAGE_RELEASE ${RELEASE} CACHE STRING "" FORCE) set (RPM_SOURCE_DIRECTORY_NAME ${CPACK_SOURCE_PACKAGE_FILE_NAME} CACHE STRING "" FORCE) set (RPM_PACKAGE_SOURCE_FILE_NAME ${CPACK_SOURCE_PACKAGE_FILE_NAME}.tar.gz CACHE STRING "" FORCE) set (RPM_BUILDROOT "${PROJECT_BINARY_DIR}/RPM/BUILDROOT" CACHE STRING "" FORCE) add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/${CPACK_SOURCE_PACKAGE_FILE_NAME}.tar.gz WORKING_DIRECTORY ${PROJECT_BINARY_DIR} COMMAND $(MAKE) package_source) add_custom_command(OUTPUT ${RPM_BUILDROOT} COMMAND ${MKDIR} -p ${RPM_BUILDROOT}) add_custom_target(rpm_src DEPENDS ${PROJECT_BINARY_DIR}/${CPACK_SOURCE_PACKAGE_FILE_NAME}.tar.gz COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --define '_sourcedir ./' --define '_srcrpmdir ./' -bs ${PROJECT_SOURCE_DIR}/extra/rpm/tarantool.rpm.spec WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm DEPENDS rpm_src DEPENDS ${RPM_BUILDROOT} COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --rebuild ${PROJECT_BINARY_DIR}/tarantool-${VERSION}-${RELEASE}.src.rpm WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_systemd DEPENDS rpm_src DEPENDS ${RPM_BUILDROOT} COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --with systemd --rebuild ${PROJECT_BINARY_DIR}/tarantool-${VERSION}-${RELEASE}.src.rpm WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_scl_full_old DEPENDS ${RPM_BUILDROOT} DEPENDS ${PROJECT_BINARY_DIR}/${CPACK_SOURCE_PACKAGE_FILE_NAME}.tar.gz COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} -bb ${PROJECT_SOURCE_DIR}/extra/rpm/tarantool-scl.rpm.spec COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --define '_sourcedir ./' -bb ${PROJECT_SOURCE_DIR}/extra/rpm/tarantool.rpm.spec --define 'scl ${SCL_TARANTOOL}' WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_scl_src COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --define '_srcrpmdir ./' -bs ${PROJECT_SOURCE_DIR}/extra/rpm/tarantool-scl.rpm.spec WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_scl_noarch DEPENDS rpm_scl_src DEPENDS ${RPM_BUILDROOT} COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --rebuild ${PROJECT_BINARY_DIR}/tarantool-${SCL_TARANTOOL}-${SCL_VERSION}-${SCL_RELEASE}.src.rpm WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_scl_arch DEPENDS rpm_src DEPENDS ${RPM_BUILDROOT} COMMAND ${RPMBUILD} --buildroot ${RPM_BUILDROOT} --rebuild ${PROJECT_BINARY_DIR}/tarantool-${VERSION}-${RELEASE}.src.rpm --define 'scl ${SCL_TARANTOOL}' WORKING_DIRECTORY ${PROJECT_BINARY_DIR} ) add_custom_target(rpm_scl DEPENDS rpm_scl_noarch DEPENDS rpm_scl_arch ) # TODO: Add MOCK builds # : -DMOCK_TARGET # : -DMOCK_OS: EPEL / FEDORA endif() tarantool_1.6.7.588.g76bbd9c/cmake/FindLibEIO.cmake0000664000000000000000000000113612634006617020077 0ustar rootrootfind_path(LIBEIO_INCLUDE_DIR NAMES eio.h) find_library(LIBEIO_LIBRARIES NAMES eio) if(LIBEIO_INCLUDE_DIR AND LIBEIO_LIBRARIES) set(LIBEIO_FOUND ON) endif(LIBEIO_INCLUDE_DIR AND LIBEIO_LIBRARIES) if(LIBEIO_FOUND) if (NOT LIBEIO_FIND_QUIETLY) message(STATUS "Found libeio includes: ${LIBEIO_INCLUDE_DIR}/eio.h") message(STATUS "Found libeio library: ${LIBEIO_LIBRARIES}") endif (NOT LIBEIO_FIND_QUIETLY) else(LIBEIO_FOUND) if (LIBEIO_FIND_REQUIRED) message(FATAL_ERROR "Could not find libeio development files") endif (LIBEIO_FIND_REQUIRED) endif (LIBEIO_FOUND) tarantool_1.6.7.588.g76bbd9c/cmake/FindOptionalPackage.cmake0000664000000000000000000000262312634006617022077 0ustar rootrootif (NOT _OptionalPackagesFile) set(_OptionalPackagesFile ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/OptionalPackages.txt) if (EXISTS ${_OptionalPackagesFile}) file(REMOVE ${_OptionalPackagesFile}) endif() endif() file(APPEND "${_OptionalPackagesFile}" "") macro (find_optional_package _package) string(TOUPPER ${_package} _packageUpper) if (NOT DEFINED WITH_${_packageUpper}) # First run and WITH_${_packageUpper} option is not set by the user. # Enable auto-mode and try to find package. find_package(${_package} ${ARGN}) elseif (WITH_${_packageUpper}) # Non-first run or WITH_${_packageUpper} was set by the user. # Force error if the package will not be found. set(${_packageUpper}_FIND_REQUIRED ON) find_package(${_package} ${ARGN}) endif () if (${_package}_FOUND OR ${_packageUpper}_FOUND) set(_default ON) else() set(_default OFF) endif() # Add the user option and (!) update the cache option(WITH_${_packageUpper} "Search for ${_package} package" ${_default}) # Now ${WITH_${_packageUpper}} is either ON or OFF file(APPEND "${_OptionalPackagesFile}" "-- WITH_${_packageUpper}=${WITH_${_packageUpper}}\n") endmacro (find_optional_package) macro(list_optional_packages) file(READ ${_OptionalPackagesFile} _message) message(STATUS "\n${_message}") endmacro() tarantool_1.6.7.588.g76bbd9c/cmake/BuildSophia.cmake0000664000000000000000000000311512634006617020435 0ustar rootroot# A macro to build the bundled sophia library # macro(sophia_build) set(SOPHIA_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party/sophia/sophia/sophia) set(SOPHIA_OPTS CFLAGS="${CMAKE_C_FLAGS}" LDFLAGS="${CMAKE_SHARED_LINKER_FLAGS}") separate_arguments(SOPHIA_OPTS) if (${PROJECT_BINARY_DIR} STREQUAL ${PROJECT_SOURCE_DIR}) add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/third_party/sophia/libsophia.a WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/third_party/sophia COMMAND $(MAKE) ${SOPHIA_OPTS} clean COMMAND $(MAKE) ${SOPHIA_OPTS} static DEPENDS ${CMAKE_SOURCE_DIR}/CMakeCache.txt ) else() add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/sophia COMMAND ${CMAKE_COMMAND} -E make_directory ${PROJECT_BINARY_DIR}/third_party/sophia ) add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/third_party/sophia/libsophia.a WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/third_party/sophia COMMAND ${CMAKE_COMMAND} -E copy_directory ${PROJECT_SOURCE_DIR}/third_party/sophia ${PROJECT_BINARY_DIR}/third_party/sophia COMMAND $(MAKE) ${SOPHIA_OPTS} clean COMMAND $(MAKE) ${SOPHIA_OPTS} static DEPENDS ${PROJECT_BINARY_DIR}/CMakeCache.txt ${PROJECT_BINARY_DIR}/third_party/sophia ) endif() add_custom_target(libsophia ALL DEPENDS ${PROJECT_BINARY_DIR}/third_party/sophia/libsophia.a ) message(STATUS "Use bundled Sophia: ${PROJECT_SOURCE_DIR}/third_party/sophia/") set (sophia_lib "${PROJECT_BINARY_DIR}/third_party/sophia/libsophia.a") add_dependencies(build_bundled_libs libsophia) endmacro(sophia_build) tarantool_1.6.7.588.g76bbd9c/cmake/atomic.cmake0000664000000000000000000000306212634006617017507 0ustar rootroot# Try compile a sample code using atomics and put success/failure # status in the TARGET_VAR. # Extra arguments (if any) are passed as compiler flags. # Note: CMAKE_C_FLAGS overrides any flag passed this way. The intention # is to avoid changing the architecture if it was set explicitly in # CMake invocation. function(check_cc_atomics TARGET_VAR) set(CMAKE_REQUIRED_INCLUDES ${CMAKE_SOURCE_DIR}) set(CMAKE_REQUIRED_FLAGS "${ARGN} ${CMAKE_C_FLAGS}") set(CMAKE_C_FLAGS "") check_c_source_compiles(" #include int counter; int main() { return pm_atomic_fetch_add(&counter, 42); }" ${TARGET_VAR}) endfunction() check_cc_atomics(CC_HAS_ATOMICS) if (CC_HAS_ATOMICS) return() endif() # Atomics support missing with the default flags. # If the failure was due to the compiler targeting an outdated CPU # without atomic instructions we will fix it now. # The precise flags depend on the processor architecture and the # compiler being used. # x86 (32 bit) if (CMAKE_SYSTEM_PROCESSOR MATCHES "^i[3-9]86$") if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG) set(CC_ATOMICS_WORKAROUND_FLAGS "-march=i686") endif() endif() # Attempt to compile the same code again with the extra flags. check_cc_atomics( CC_ATOMICS_WORKAROUND_WORKS ${CC_ATOMICS_WORKAROUND_FLAGS}) if (CC_ATOMICS_WORKAROUND_WORKS) message(STATUS "Enabling atomics (${CC_ATOMICS_WORKAROUND_FLAGS})") add_compile_flags("C;CXX" ${CC_ATOMICS_WORKAROUND_FLAGS}) else() message(FATAL_ERROR "C atomics not supported") endif() tarantool_1.6.7.588.g76bbd9c/README.CentOS0000664000000000000000000000360212634006617016163 0ustar rootrootTarget OS: CentOS 5.8 (Final) 1. Install EPEL repository: ------------- http://fedoraproject.org/wiki/EPEL/FAQ#How_can_I_install_the_packages_from_the_EPEL_software_repository.3F sudo rpm -iv ./epel-release-5-4.noarch.rpm 2. Install necessary packages: ------------- sudo yum install gcc gcc-c++ gcc-objc cmake git readline-devel ncurses-devel binutuls-devel 3. Install gcc 4.6.x and gcc infrastructure pre-requisites ------------- (x) From one of the gcc mirrors download from /gcc/infrastructure: gmp, mpfr and mpc packages; (x) Configure and build the pre-requisites using --prefix=/usr/local and --with-gmp=/usr/local (see gcc.gnu.org/install); (x) Configure gcc as: configure --prefix=/usr/local --enable-languages=c,c++,objc --program-suffix=463 --enable-shared --enable-threads=posix --with-mpc=/usr/local (x) Build gcc as per steps outlined in GCC documentation gcc.gnu.org/install; (x) Set up the environment to include the new GCC's libs: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib:/usr/local/lib64 4. Download & build tarantool source code: ------------- git clone git://github.com/tarantool/tarantool.git git submodule update --init cd tarantool CC=gcc463 CXX=g++463 cmake . -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_CLIENT=true && make 5. Install test-required packages and modules for Python 2.6 ------------- sudo yum install python26 python26-PyYAML python26-argparse wget http://pypi.python.org/packages/source/d/daemon/daemon-1.0.tar.gz#md5=b0bebffc51965a66ec4a4bc1006fa90b tar -xzvf daemon-1.0.tar.gz sudo python26 setup.py install 6. Set up python 2.6 to run tarantool tests ------------- mkdir ~/build/bin && ln -s /usr/bin/python26 ~/build/bin/python 7. Run tarantool test suite ------------- cd ~/build/tarantool/test PATH=~/build/bin:$PATH ./run 8. Create RPM Packages ------------- cmake . make rpm (packages are available from RPM/i386/ or RPM/x86_64/) -- EOF tarantool_1.6.7.588.g76bbd9c/TODO0000664000000000000000000000022212634006617014634 0ustar rootrootWe're using Github for task tracking and bugs. Please use http://github.com/tarantool/tarantool/issues Thank you for your interest in Tarantool! tarantool_1.6.7.588.g76bbd9c/README.FreeBSD0000664000000000000000000000140512634006617016241 0ustar rootrootTarget OS: FreeBSD 10.1 (RELEASE) 1. Install necessary packages: ------------- pkg install sudo git cmake gmake gcc49 readline 2. Download & build tarantool source code: ------------- git clone git://github.com/tarantool/tarantool.git cd tarantool mkdir build && cd build git submodule update --init CC=gcc49 CXX=g++49 cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_C_FLAGS="-Wl,-rpath=/usr/local/lib/gcc49" -DCMAKE_CXX_FLAGS="-Wl,-rpath=/usr/local/lib/gcc49" gmake 3. Set up python 2.7 ------------- From packages: pkg install python27 py27-yaml py27-daemon py27-msgpack From pip: pkg install py27-virtualenv virtualenv .venv source .venv/bin/activate pip install -r ../test-run/requirements.txt 4. Run tarantool test suite ------------- gmake test -- EOF tarantool_1.6.7.588.g76bbd9c/AUTHORS0000664000000000000000000000133112634006617015216 0ustar rootrootTarantool is a collective effort, and incorporates many contributions from the community. Below follows a list of people, who contributed their code. Aleksandr Lyapunov, Aleksey Demakov, Aleksey Mashanov, Alexandre Kalendarev, Andrey Drozdov, Anton Barabanov, Damien Lefortier, Dmitry E. Oboukhov, Dmitry Simonenko, Eugene Blikh, Eugene Shadrin, Konstantin Knizhnik, Konstantin Osipov, Konstantin Shulgin, Mons Anderson, Marko Kevac, Oleg Tsarev, Pavel Cherenkov, Roman Antipin, Roman Tokarev, Roman Tsisyk, Teodor Sigaev, Timofey Khryukin, Veniamin Gvozdikov, Vassiliy Soshnikov, Vladimir Rudnyh, Yuriy Nevinitsin, Yuriy Vostrikov NOTE: If you can commit a change to this list, please do not hesitate to add your name to it. tarantool_1.6.7.588.g76bbd9c/third_party/0000775000000000000000000000000012634747304016506 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/tarantool_eio.c0000664000000000000000000000254012634006617021505 0ustar rootroot/* * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * 1. Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "tarantool_eio.h" #include "third_party/libeio/eio.c" tarantool_1.6.7.588.g76bbd9c/third_party/memmem.c0000664000000000000000000000444712634006617020133 0ustar rootroot/* $NetBSD: memmem.c,v 1.2 2008/04/28 20:23:00 martin Exp $ */ /*- * Copyright (c) 2005 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Perry E. Metzger of Metzger, Dowdeswell & Co. LLC. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include void * memmem(const void *block, size_t blen, const void *pat, size_t plen) { const unsigned char *bp, *pp, *endp; assert(block != NULL); assert(pat != NULL); /* * Following the precedent in ststr(3) and glibc, a zero * length pattern matches the start of block. */ if (plen == 0) return (void*) block; if (blen < plen) return NULL; bp = block; pp = pat; endp = bp + (blen - plen) + 1; /* * As a cheezy optimization, check that the first chars are * the same before calling memcmp. Really we should use bm(3) * to speed this up if blen is large enough. */ while (bp < endp) { if ((*bp == *pp) && (memcmp(bp, pp, plen) == 0)) return (void *) bp; bp++; } return NULL; } tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/0000775000000000000000000000000012634747304020227 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/TODO0000664000000000000000000000027212634006617020713 0ustar rootroot* allow creating dump/load objects with internal configuration settings * better error checking when using LibYAML dump functions * potentially support additional Lua types (functions?) tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/b64.c0000664000000000000000000000562612634006617020772 0ustar rootroot#include #include #include "b64.h" int frombase64(lua_State *L, const unsigned char *str, unsigned int len) { int d = 0, dlast = 0, phase = 0; unsigned char c; static int table[256] = { -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* 00-0F */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* 10-1F */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63, /* 20-2F */ 52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1, /* 30-3F */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14, /* 40-4F */ 15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1, /* 50-5F */ -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40, /* 60-6F */ 41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1, /* 70-7F */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* 80-8F */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* 90-9F */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* A0-AF */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* B0-BF */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* C0-CF */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* D0-DF */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, /* E0-EF */ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 /* F0-FF */ }; luaL_Buffer b; luaL_buffinit(L, &b); for (; len--; ++str) { d = table[(int)*str]; if (d == -1) continue; switch(phase) { case 0: ++phase; break; case 1: c = ((dlast << 2) | ((d & 0x30) >> 4)); luaL_addchar(&b, c); ++phase; break; case 2: c = (((dlast & 0xf) << 4) | ((d & 0x3c) >> 2)); luaL_addchar(&b, c); ++phase; break; case 3: c = (((dlast & 0x03 ) << 6) | d); luaL_addchar(&b, c); phase = 0; break; } dlast = d; } luaL_pushresult(&b); return 1; } static void b64_encode(luaL_Buffer *b, unsigned int c1, unsigned int c2, unsigned int c3, int n) { static const char code[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; unsigned long tuple = c3 + 256UL * (c2 + 256UL * c1); int i; char s[4]; for (i = 0; i < 4; i++) { s[3-i] = code[tuple % 64]; tuple /= 64; } for (i = n+1; i < 4; i++) s[i] = '='; luaL_addlstring(b, s, 4); } int tobase64(lua_State *L, int pos) { size_t l; const unsigned char *s = (const unsigned char*)luaL_checklstring(L, pos, &l); luaL_Buffer b; int n; luaL_buffinit(L, &b); for (n = l / 3; n--; s += 3) b64_encode(&b, s[0], s[1], s[2], 3); switch (l % 3) { case 1: b64_encode(&b, s[0], 0, 0, 1); break; case 2: b64_encode(&b, s[0], s[1], 0, 2); break; } luaL_pushresult(&b); return 1; } tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/HISTORY0000664000000000000000000000072112634006617021306 0ustar rootroot0.1: May 12 2009 * initial release 0.2: November 23 2009 * updated libyaml to version 0.1.3 * now properly dumps and loads strings containing binary data using base64 * dumped strings are quoted when they could be loaded as numbers * nulls are loaded as yaml.null, a function that returns itself and can be used to test for equality * load now also recognizes 'yes' as a boolean truth value * zero length scalars are not converted to nil tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/lyaml.h0000664000000000000000000000030012634006617021502 0ustar rootroot#ifndef LYAML_H #define LYAML_H #ifdef __cplusplus extern "C" { #endif #include LUALIB_API int luaopen_yaml(lua_State *L); #ifdef __cplusplus } #endif #endif /* #ifndef LYAML_H */ tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/LICENSE0000664000000000000000000000211712634006617021230 0ustar rootrootCopyright (c) 2009, Andrew Danforth Copyright (c) 2013-2015, Tarantool Authors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/b64.h0000664000000000000000000000016412634006617020767 0ustar rootroot#include int frombase64(lua_State *, const unsigned char *, unsigned int); int tobase64(lua_State *, int); tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/README0000664000000000000000000000207112634006617021102 0ustar rootrootNAME yaml - Lua YAML serialization using LibYAML SYNOPSIS require 'yaml' serialized = yaml.dump({ 1, 2, 3, 4 }) content = yaml.load(serialized) DESCRIPTION This module is a Lua binding for Kirill Siminov's excellent LibYAML. LibYAML is generally considered to be the best C YAML 1.1 implementation. LibYAML 0.1.3 is included as part of this release. This module defines the functions dump, load, and configure within the global yaml table. Portions of this software were inspired by Perl's YAML::LibYAML module by Ingy dt Net. SEE ALSO * LibYAML (http://pyyaml.org/wiki/LibYAML) * luayaml: libsyck YAML binding (http://luaforge.net/projects/luayaml) * YAML::LibYAML (http://search.cpan.org/~nuffin/YAML-LibYAML) AUTHOR Andrew Danforth If you are using this module successfully I would love to hear from you. COPYRIGHT Copyright (c) 2009, Andrew Danforth THANKS Thanks to the following people for suggestions and patches: Peter Mawhorter Cyril Romain Adrian Sampson tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/lyaml.cc0000664000000000000000000006157012634747304021665 0ustar rootroot/* * lyaml.c, LibYAML binding for Lua * * Copyright (c) 2009, Andrew Danforth * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * Portions of this software were inspired by Perl's YAML::LibYAML module by * Ingy döt Net * */ #include "lyaml.h" #include #include #include #include extern "C" { #include #include #include #include #include #include #include #include #include "yaml.h" #include "b64.h" } /* extern "C" */ #include "lua/utils.h" #define LUAYAML_TAG_PREFIX "tag:yaml.org,2002:" #define RETURN_ERRMSG(s, msg) do { \ lua_pushstring(s->L, msg); \ s->error = 1; \ return; \ } while(0) struct lua_yaml_loader { lua_State *L; struct luaL_serializer *cfg; int anchortable_index; int document_count; yaml_parser_t parser; yaml_event_t event; char validevent; char error; }; struct lua_yaml_dumper { lua_State *L; struct luaL_serializer *cfg; int anchortable_index; unsigned int anchor_number; yaml_emitter_t emitter; char error; lua_State *outputL; luaL_Buffer yamlbuf; }; static void generate_error_message(struct lua_yaml_loader *loader) { char buf[256]; luaL_Buffer b; luaL_buffinit(loader->L, &b); luaL_addstring(&b, loader->parser.problem ? loader->parser.problem : "A problem"); snprintf(buf, sizeof(buf), " at document: %d", loader->document_count); luaL_addstring(&b, buf); if (loader->parser.problem_mark.line || loader->parser.problem_mark.column) { snprintf(buf, sizeof(buf), ", line: %d, column: %d\n", (int) loader->parser.problem_mark.line + 1, (int) loader->parser.problem_mark.column + 1); luaL_addstring(&b, buf); } else { luaL_addstring(&b, "\n"); } if (loader->parser.context) { snprintf(buf, sizeof(buf), "%s at line: %d, column: %d\n", loader->parser.context, (int) loader->parser.context_mark.line + 1, (int) loader->parser.context_mark.column + 1); luaL_addstring(&b, buf); } luaL_pushresult(&b); } static inline void delete_event(struct lua_yaml_loader *loader) { if (loader->validevent) { yaml_event_delete(&loader->event); loader->validevent = 0; } } static inline int do_parse(struct lua_yaml_loader *loader) { delete_event(loader); if (yaml_parser_parse(&loader->parser, &loader->event) != 1) { generate_error_message(loader); loader->error = 1; return 0; } loader->validevent = 1; return 1; } static int load_node(struct lua_yaml_loader *loader); static void handle_anchor(struct lua_yaml_loader *loader) { const char *anchor = (char *)loader->event.data.scalar.anchor; if (!anchor) return; lua_pushstring(loader->L, anchor); lua_pushvalue(loader->L, -2); lua_rawset(loader->L, loader->anchortable_index); } static void load_map(struct lua_yaml_loader *loader) { lua_createtable(loader->L, 0, 5); if (loader->cfg->decode_save_metatables) luaL_setmaphint(loader->L, -1); handle_anchor(loader); while (1) { int r; /* load key */ if (load_node(loader) == 0 || loader->error) return; /* load value */ r = load_node(loader); if (loader->error) return; if (r != 1) RETURN_ERRMSG(loader, "unanticipated END event"); lua_rawset(loader->L, -3); } } static void load_sequence(struct lua_yaml_loader *loader) { int index = 1; lua_createtable(loader->L, 5, 0); if (loader->cfg->decode_save_metatables) luaL_setarrayhint(loader->L, -1); handle_anchor(loader); while (load_node(loader) == 1 && !loader->error) lua_rawseti(loader->L, -2, index++); } static void load_scalar(struct lua_yaml_loader *loader) { const char *str = (char *)loader->event.data.scalar.value; unsigned int length = loader->event.data.scalar.length; const char *tag = (char *)loader->event.data.scalar.tag; if (tag && !strncmp(tag, LUAYAML_TAG_PREFIX, sizeof(LUAYAML_TAG_PREFIX) - 1)) { tag += sizeof(LUAYAML_TAG_PREFIX) - 1; if (!strcmp(tag, "str")) { lua_pushlstring(loader->L, str, length); return; } else if (!strcmp(tag, "int")) { lua_pushinteger(loader->L, strtol(str, NULL, 10)); return; } else if (!strcmp(tag, "float")) { double dval = fpconv_strtod(str, NULL); luaL_checkfinite(loader->L, loader->cfg, dval); lua_pushnumber(loader->L, dval); return; } else if (!strcmp(tag, "bool")) { lua_pushboolean(loader->L, !strcmp(str, "true") || !strcmp(str, "yes")); return; } else if (!strcmp(tag, "binary")) { frombase64(loader->L, (const unsigned char *)str, length); return; } } if (loader->event.data.scalar.style == YAML_PLAIN_SCALAR_STYLE) { if (!strcmp(str, "~")) { luaL_pushnull(loader->L); return; } else if (!strcmp(str, "true") || !strcmp(str, "yes")) { lua_pushboolean(loader->L, 1); return; } else if (!strcmp(str, "false") || !strcmp(str, "no")) { lua_pushboolean(loader->L, 0); return; } else if (!strcmp(str, "null")) { luaL_pushnull(loader->L); return; } else if (!length) { lua_pushliteral(loader->L, ""); return; } /* plain scalar and Lua can convert it to a number? make it so... */ char *endptr = NULL; long long ival = strtoll(str, &endptr, 10); if (endptr == str + length && ival != LLONG_MAX) { luaL_pushint64(loader->L, ival); return; } unsigned long long uval = strtoull(str, &endptr, 10); if (endptr == str + length) { luaL_pushuint64(loader->L, uval); return; } double dval = fpconv_strtod(str, &endptr); if (endptr == str + length) { luaL_checkfinite(loader->L, loader->cfg, dval); lua_pushnumber(loader->L, dval); return; } } lua_pushlstring(loader->L, str, length); handle_anchor(loader); } static void load_alias(struct lua_yaml_loader *loader) { char *anchor = (char *)loader->event.data.alias.anchor; lua_pushstring(loader->L, anchor); lua_rawget(loader->L, loader->anchortable_index); if (lua_isnil(loader->L, -1)) { char buf[256]; snprintf(buf, sizeof(buf), "invalid reference: %s", anchor); RETURN_ERRMSG(loader, buf); } } static int load_node(struct lua_yaml_loader *loader) { if (!do_parse(loader)) return -1; switch (loader->event.type) { case YAML_DOCUMENT_END_EVENT: case YAML_MAPPING_END_EVENT: case YAML_SEQUENCE_END_EVENT: return 0; case YAML_MAPPING_START_EVENT: load_map(loader); return 1; case YAML_SEQUENCE_START_EVENT: load_sequence(loader); return 1; case YAML_SCALAR_EVENT: load_scalar(loader); return 1; case YAML_ALIAS_EVENT: load_alias(loader); return 1; case YAML_NO_EVENT: lua_pushliteral(loader->L, "libyaml returned YAML_NO_EVENT"); loader->error = 1; return -1; default: lua_pushliteral(loader->L, "invalid event"); loader->error = 1; return -1; } } static void load(struct lua_yaml_loader *loader) { if (!do_parse(loader)) return; if (loader->event.type != YAML_STREAM_START_EVENT) RETURN_ERRMSG(loader, "expected STREAM_START_EVENT"); while (1) { if (!do_parse(loader)) return; if (loader->event.type == YAML_STREAM_END_EVENT) return; loader->document_count++; if (load_node(loader) != 1) RETURN_ERRMSG(loader, "unexpected END event"); if (loader->error) return; if (!do_parse(loader)) return; if (loader->event.type != YAML_DOCUMENT_END_EVENT) RETURN_ERRMSG(loader, "expected DOCUMENT_END_EVENT"); /* reset anchor table */ lua_newtable(loader->L); lua_replace(loader->L, loader->anchortable_index); } } static int l_load(lua_State *L) { struct lua_yaml_loader loader; luaL_argcheck(L, lua_isstring(L, 1), 1, "must provide a string argument"); loader.L = L; loader.cfg = luaL_checkserializer(L); loader.validevent = 0; loader.error = 0; loader.document_count = 0; /* create table used to track anchors */ lua_newtable(L); loader.anchortable_index = lua_gettop(L); yaml_parser_initialize(&loader.parser); yaml_parser_set_input_string(&loader.parser, (const unsigned char *)lua_tostring(L, 1), lua_strlen(L, 1)); load(&loader); delete_event(&loader); yaml_parser_delete(&loader.parser); if (loader.error) lua_error(L); return loader.document_count; } static int dump_node(struct lua_yaml_dumper *dumper); static yaml_char_t *get_yaml_anchor(struct lua_yaml_dumper *dumper) { const char *s = ""; lua_pushvalue(dumper->L, -1); lua_rawget(dumper->L, dumper->anchortable_index); if (!lua_toboolean(dumper->L, -1)) { lua_pop(dumper->L, 1); return NULL; } if (lua_isboolean(dumper->L, -1)) { /* this element is referenced more than once but has not been named */ char buf[32]; snprintf(buf, sizeof(buf), "%u", dumper->anchor_number++); lua_pop(dumper->L, 1); lua_pushvalue(dumper->L, -1); lua_pushstring(dumper->L, buf); s = lua_tostring(dumper->L, -1); lua_rawset(dumper->L, dumper->anchortable_index); } else { /* this is an aliased element */ yaml_event_t ev; yaml_alias_event_initialize(&ev, (yaml_char_t *)lua_tostring(dumper->L, -1)); yaml_emitter_emit(&dumper->emitter, &ev); lua_pop(dumper->L, 1); } return (yaml_char_t *)s; } static int dump_table(struct lua_yaml_dumper *dumper, struct luaL_field *field){ yaml_event_t ev; yaml_char_t *anchor = get_yaml_anchor(dumper); if (anchor && !*anchor) return 1; yaml_mapping_style_t yaml_style = (field->compact) ? (YAML_FLOW_MAPPING_STYLE) : YAML_BLOCK_MAPPING_STYLE; yaml_mapping_start_event_initialize(&ev, anchor, NULL, 0, yaml_style); yaml_emitter_emit(&dumper->emitter, &ev); lua_pushnil(dumper->L); while (lua_next(dumper->L, -2)) { lua_pushvalue(dumper->L, -2); /* push copy of key on top of stack */ if (!dump_node(dumper) || dumper->error) return 0; lua_pop(dumper->L, 1); /* pop copy of key */ if (!dump_node(dumper) || dumper->error) return 0; lua_pop(dumper->L, 1); } yaml_mapping_end_event_initialize(&ev); yaml_emitter_emit(&dumper->emitter, &ev); return 1; } static int dump_array(struct lua_yaml_dumper *dumper, struct luaL_field *field){ int i; yaml_event_t ev; yaml_char_t *anchor = get_yaml_anchor(dumper); if (anchor && !*anchor) return 1; yaml_sequence_style_t yaml_style = (field->compact) ? (YAML_FLOW_SEQUENCE_STYLE) : YAML_BLOCK_SEQUENCE_STYLE; yaml_sequence_start_event_initialize(&ev, anchor, NULL, 0, yaml_style); yaml_emitter_emit(&dumper->emitter, &ev); for (i = 0; i < field->size; i++) { lua_rawgeti(dumper->L, -1, i + 1); if (!dump_node(dumper) || dumper->error) return 0; lua_pop(dumper->L, 1); } yaml_sequence_end_event_initialize(&ev); yaml_emitter_emit(&dumper->emitter, &ev); return 1; } static int dump_null(struct lua_yaml_dumper *dumper) { yaml_event_t ev; yaml_scalar_event_initialize(&ev, NULL, NULL, (unsigned char *)"null", 4, 1, 1, YAML_PLAIN_SCALAR_STYLE); return yaml_emitter_emit(&dumper->emitter, &ev); } static yaml_scalar_style_t analyze_string(struct lua_yaml_dumper *dumper, const char *str, size_t len, int *is_binary) { *is_binary = 0; /** * This function ported from PyYAML implementation. * PyYAML has same authors and licence as LibYAML. See License.LibYaml * https://bitbucket.org/xi/pyyaml/src/ddf211a41bb231c365fece5599b7e484e6dc33fc/lib/yaml/emitter.py?at=default#cl-629 */ /* * Fast checks */ /* Display empty scalar as plain */ if (len == 0) return YAML_PLAIN_SCALAR_STYLE; /* Special string values */ if (len <= 5 && (!strcmp(str, "true") || !strcmp(str, "false") || !strcmp(str, "~") || !strcmp(str, "null"))) { return YAML_SINGLE_QUOTED_SCALAR_STYLE; } /* Check document indicators. */ if (len >= 3 && (memcmp(str, "---", 3) == 0 || memcmp(str, "...", 3) == 0)) return YAML_LITERAL_SCALAR_STYLE; /* Allowed styles */ bool allowPlain = true; bool allowSingleQuoted = true; /* Indicators and special characters. */ bool blockIndicators = false; bool flowIndicators = false; bool lineBreaks = false; bool specialCharacters = false; /* Important whitespace combinations. */ bool leadingSpace = false; bool leadingBreak = false; bool trailingSpace = false; bool trailingBreak = false; bool breakSpace = false; bool spaceBreak = false; bool emptyLines = false; bool previousSpace = false; bool previousBreak = false; const unsigned char *s = (const unsigned char *) str; const unsigned char *p = s; const unsigned char *e = s + len; while (p < e) { if (*p > 0x7F) { /* UTF-8 */ int continuation_bytes = 0; if (*p >= 0xC0 && *p <= 0xDF) { continuation_bytes = 1; } else if (*p >= 0xE0 && *p <= 0xEF /*11101111*/) { continuation_bytes = 2; } else if (*p >= 0xF0 && *p <= 0xF4) { continuation_bytes = 3; } else { /* Invalid UTF-8 */ *is_binary = 1; return YAML_PLAIN_SCALAR_STYLE; } ++p; while (p < e && continuation_bytes > 0 && *p >= 0x80 && *p <= 0xBF) { ++p; continuation_bytes -= 1; } if (continuation_bytes != 0) { /* Invalid UTF-8 */ *is_binary = 1; return YAML_PLAIN_SCALAR_STYLE; } else { continue; } } /* ASCII */ bool preceededByWhitespace = (p > s) && strchr(" \t\r\n\x85", *(p - 1)) != NULL; bool followedByWhitespace = (p + 1 >= s + len) || strchr(" \t\r\n\x85", *(p + 1)) != NULL; /* Check for line breaks and special characters */ bool isLineBreak = false; if (*p == '\n' || *p == 0x85) { lineBreaks = isLineBreak = true; } else if (*p < 0x20) { specialCharacters = true; } /* Check for indicators. */ if (p == s) { /* Leading indicators are special characters. */ if (strchr("#,[]{}&*!|>\'\"%@`", *p) != NULL) { flowIndicators = true; blockIndicators = true; } if (*p == '?' || *p == ':') { flowIndicators = true; if (followedByWhitespace) blockIndicators = true; } if (*p == '-' && followedByWhitespace) { flowIndicators = true; blockIndicators = true; } } else { if (isLineBreak && *(p - 1) == '\n') emptyLines = true; /* Some indicators cannot appear within a scalar as well. */ if (strchr(",?[]{}", *p) != NULL) { flowIndicators = true; } if (*p == ':') { flowIndicators = true; if (followedByWhitespace) { blockIndicators = true; } } if (*p == '#' && preceededByWhitespace) { flowIndicators = true; blockIndicators = true; } } /* Detect important whitespace combinations. */ if (*p == ' ') { if (p == s) leadingSpace = true; if (p == s + len - 1) trailingSpace = true; if (previousBreak) breakSpace = true; previousSpace = true; previousBreak = false; } else if (isLineBreak) { if (p == s) leadingBreak = true; if (p == s + len - 1) trailingBreak = true; if (previousSpace) spaceBreak = true; previousSpace = false; previousBreak = true; } else { previousSpace = false; previousBreak = false; } ++p; } /* * Tarantool-specific: use literal style for string with empty lines. * Useful for tutorial(). */ if (emptyLines) return YAML_LITERAL_SCALAR_STYLE; bool flowMode = false; if (dumper->emitter.flow_level > 0) { flowMode = true; } else { yaml_event_t *evp; for (evp = dumper->emitter.events.head; evp != dumper->emitter.events.tail; evp++) { if ((evp->type == YAML_SEQUENCE_START_EVENT && evp->data.sequence_start.style == YAML_FLOW_SEQUENCE_STYLE) || (evp->type == YAML_MAPPING_START_EVENT && evp->data.mapping_start.style == YAML_FLOW_MAPPING_STYLE)) { flowMode = true; break; } } } /* Let's decide what styles are allowed. */ /* * Spaces followed by breaks, as well as special character are only * allowed for double quoted scalars. */ if (spaceBreak || specialCharacters) return YAML_DOUBLE_QUOTED_SCALAR_STYLE; /* * Spaces at the beginning of a new line are only acceptable for block * scalars */ if (breakSpace) allowPlain = allowSingleQuoted = false; /* Leading and trailing whitespaces are bad for plain scalars. */ if (leadingSpace || leadingBreak || trailingSpace || trailingBreak) allowPlain = false; if (flowMode) { //if (flowMode && flowIndicators) // allowPlain = false; /* * Tarantool-specific: always quote strings in FLOW SEQUENCE * Flow: [1, 'a', 'testing'] * Block: * - 1 * - a * - testing */ allowPlain = false; } else /* blockMode */ { /* Block indicators are forbidden for block plain scalars. */ if (blockIndicators) allowPlain = false; } if (allowPlain) return YAML_PLAIN_SCALAR_STYLE; else if (allowSingleQuoted) return YAML_SINGLE_QUOTED_SCALAR_STYLE; return YAML_DOUBLE_QUOTED_SCALAR_STYLE; /* TODO: Probably causes https://github.com/tarantool/tarantool/issues/354 */ (void) flowIndicators; (void) lineBreaks; } static int dump_node(struct lua_yaml_dumper *dumper) { size_t len; const char *str = NULL; yaml_char_t *tag = NULL; yaml_event_t ev; //yaml_event_t *evp; yaml_scalar_style_t style = YAML_PLAIN_SCALAR_STYLE; int is_binary = 0; char buf[FPCONV_G_FMT_BUFSIZE]; struct luaL_field field; int top = lua_gettop(dumper->L); luaL_checkfield(dumper->L, dumper->cfg, top, &field); switch(field.type) { case MP_UINT: snprintf(buf, sizeof(buf) - 1, "%" PRIu64, field.ival); buf[sizeof(buf) - 1] = 0; str = buf; len = strlen(buf); break; case MP_INT: snprintf(buf, sizeof(buf) - 1, "%" PRIi64, field.ival); buf[sizeof(buf) - 1] = 0; str = buf; len = strlen(buf); break; case MP_FLOAT: fpconv_g_fmt(buf, field.fval, dumper->cfg->encode_number_precision); str = buf; len = strlen(buf); break; case MP_DOUBLE: fpconv_g_fmt(buf, field.dval, dumper->cfg->encode_number_precision); str = buf; len = strlen(buf); break; case MP_ARRAY: return dump_array(dumper, &field); case MP_MAP: return dump_table(dumper, &field); case MP_STR: str = lua_tolstring(dumper->L, -1, &len); if (lua_isnumber(dumper->L, -1)) { /* string is convertible to number, quote it to preserve type */ style = YAML_SINGLE_QUOTED_SCALAR_STYLE; break; } style = analyze_string(dumper, str, len, &is_binary); if (!is_binary) break; /* Fall through */ case MP_BIN: is_binary = 1; tobase64(dumper->L, -1); str = lua_tolstring(dumper->L, -1, &len); tag = (yaml_char_t *) LUAYAML_TAG_PREFIX "binary"; break; case MP_BOOL: if (field.bval) { str = "true"; len = 4; } else { str = "false"; len = 5; } break; case MP_NIL: return dump_null(dumper); case MP_EXT: assert(false); break; } yaml_scalar_event_initialize(&ev, NULL, tag, (unsigned char *)str, len, !is_binary, !is_binary, style); if (is_binary) lua_pop(dumper->L, 1); return yaml_emitter_emit(&dumper->emitter, &ev); } static void dump_document(struct lua_yaml_dumper *dumper) { yaml_event_t ev; yaml_document_start_event_initialize(&ev, NULL, NULL, NULL, 0); yaml_emitter_emit(&dumper->emitter, &ev); if (!dump_node(dumper) || dumper->error) return; yaml_document_end_event_initialize(&ev, 0); yaml_emitter_emit(&dumper->emitter, &ev); } static int append_output(void *arg, unsigned char *buf, size_t len) { struct lua_yaml_dumper *dumper = (struct lua_yaml_dumper *)arg; luaL_addlstring(&dumper->yamlbuf, (char *)buf, len); return 1; } static void find_references(struct lua_yaml_dumper *dumper) { int newval = -1, type = lua_type(dumper->L, -1); if (type != LUA_TTABLE) return; lua_pushvalue(dumper->L, -1); /* push copy of table */ lua_rawget(dumper->L, dumper->anchortable_index); if (lua_isnil(dumper->L, -1)) newval = 0; else if (!lua_toboolean(dumper->L, -1)) newval = 1; lua_pop(dumper->L, 1); if (newval != -1) { lua_pushvalue(dumper->L, -1); lua_pushboolean(dumper->L, newval); lua_rawset(dumper->L, dumper->anchortable_index); } if (newval) return; /* recursively process other table values */ lua_pushnil(dumper->L); while (lua_next(dumper->L, -2) != 0) { find_references(dumper); /* find references on value */ lua_pop(dumper->L, 1); find_references(dumper); /* find references on key */ } } static int l_dump(lua_State *L) { struct lua_yaml_dumper dumper; int i, argcount = lua_gettop(L); yaml_event_t ev; dumper.L = L; dumper.cfg = luaL_checkserializer(L); dumper.error = 0; /* create thread to use for YAML buffer */ dumper.outputL = lua_newthread(L); luaL_buffinit(dumper.outputL, &dumper.yamlbuf); yaml_emitter_initialize(&dumper.emitter); yaml_emitter_set_unicode(&dumper.emitter, 1); yaml_emitter_set_indent(&dumper.emitter, 2); yaml_emitter_set_width(&dumper.emitter, 2); yaml_emitter_set_break(&dumper.emitter, YAML_LN_BREAK); yaml_emitter_set_output(&dumper.emitter, &append_output, &dumper); yaml_stream_start_event_initialize(&ev, YAML_UTF8_ENCODING); yaml_emitter_emit(&dumper.emitter, &ev); for (i = 0; i < argcount; i++) { lua_newtable(L); dumper.anchortable_index = lua_gettop(L); dumper.anchor_number = 0; lua_pushvalue(L, i + 1); /* push copy of arg we're processing */ find_references(&dumper); dump_document(&dumper); if (dumper.error) break; lua_pop(L, 2); /* pop copied arg and anchor table */ } yaml_stream_end_event_initialize(&ev); yaml_emitter_emit(&dumper.emitter, &ev); yaml_emitter_flush(&dumper.emitter); yaml_emitter_delete(&dumper.emitter); /* finalize and push YAML buffer */ luaL_pushresult(&dumper.yamlbuf); if (dumper.error) lua_error(L); /* move buffer to original thread */ lua_xmove(dumper.outputL, L, 1); return 1; } static int l_new(lua_State *L); const luaL_reg yamllib[] = { { "encode", l_dump }, { "decode", l_load }, { "new", l_new }, { NULL, NULL} }; static int l_new(lua_State *L) { struct luaL_serializer *s = luaL_newserializer(L, NULL, yamllib); s->has_compact = 1; return 1; } int luaopen_yaml(lua_State *L) { struct luaL_serializer *s = luaL_newserializer(L, "yaml", yamllib); s->has_compact = 1; return 1; } /* vim: et sw=3 ts=3 sts=3: */ tarantool_1.6.7.588.g76bbd9c/third_party/lua-yaml/LICENSE.LibYAML0000664000000000000000000000204212634006617022415 0ustar rootrootCopyright (c) 2006 Kirill Simonov Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. tarantool_1.6.7.588.g76bbd9c/third_party/pmatomic.h0000664000000000000000000004043412634006617020470 0ustar rootroot/*- * pmatomic.h - Poor Man's atomics * * Borrowed from FreeBSD (original copyright follows). * * Standard atomic facilities in stdatomic.h are great, unless you are * stuck with an old compiler, or you attempt to compile code using * stdatomic.h in C++ mode [gcc 4.9], or if you were desperate enough to * enable OpenMP in C mode [gcc 4.9]. * * There are several discrepancies between gcc and clang, namely clang * refuses to apply atomic operations to non-atomic types while gcc is * more tolerant. * * For these reasons we provide a custom implementation of operations on * atomic types: * * A. same names/semantics as in stdatomic.h; * B. all names prefixed with 'pm_' to avoid name collisions; * C. applicable to non-atomic types. * * Ex: * int i; * pm_atomic_fetch_add_explicit(&i, 1, pm_memory_order_relaxed); * * Note: do NOT use _Atomic keyword (see gcc issues above). */ /*- * Migration strategy * * Switching to will be relatively easy. A * straightforward text replace on the codebase removes 'pm_' prefix * in names. Compiling with clang reveals missing _Atomic qualifiers. */ /*- * Logistics * * In order to make it possible to merge with the updated upstream we * restrict modifications in this file to the bare minimum. For this * reason we comment unused code regions with #if 0 instead of removing * them. * * Renames are carried out by a script generating the final header. */ /*- * Copyright (c) 2011 Ed Schouten * David Chisnall * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: releng/10.1/sys/sys/stdatomic.h 264496 2014-04-15 09:41:52Z tijl $ */ #ifndef PMATOMIC_H__ #define PMATOMIC_H__ /* Compiler-fu */ #if !defined(__has_feature) #define __has_feature(x) 0 #endif #if !defined(__has_builtin) #define __has_builtin(x) __has_feature(x) #endif #if !defined(__GNUC_PREREQ__) #if defined(__GNUC__) && defined(__GNUC_MINOR__) #define __GNUC_PREREQ__(maj, min) \ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) #else #define __GNUC_PREREQ__(maj, min) 0 #endif #endif #include #include #include /* * Removed __PM_CLANG_ATOMICS clause, this is because * 1) clang understands gcc intrinsics as well; * 2) clang intrinsics require _Atomic quialified types while gcc ones * don't. */ #if __GNUC_PREREQ__(4, 7) #define __PM_GNUC_ATOMICS #elif defined(__GNUC__) #define __PM_SYNC_ATOMICS #else #error "pmatomic.h does not support your compiler" #endif /* * 7.17.1 Atomic lock-free macros. */ #if 0 #ifdef __GCC_ATOMIC_BOOL_LOCK_FREE #define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE #endif #ifdef __GCC_ATOMIC_CHAR_LOCK_FREE #define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE #endif #ifdef __GCC_ATOMIC_CHAR16_T_LOCK_FREE #define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE #endif #ifdef __GCC_ATOMIC_CHAR32_T_LOCK_FREE #define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE #endif #ifdef __GCC_ATOMIC_WCHAR_T_LOCK_FREE #define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE #endif #ifdef __GCC_ATOMIC_SHORT_LOCK_FREE #define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE #endif #ifdef __GCC_ATOMIC_INT_LOCK_FREE #define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE #endif #ifdef __GCC_ATOMIC_LONG_LOCK_FREE #define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE #endif #ifdef __GCC_ATOMIC_LLONG_LOCK_FREE #define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE #endif #ifdef __GCC_ATOMIC_POINTER_LOCK_FREE #define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE #endif #endif /* * 7.17.2 Initialization. */ #if 0 #if defined(__PM_CLANG_ATOMICS) #define ATOMIC_VAR_INIT(value) (value) #define atomic_init(obj, value) __c11_atomic_init(obj, value) #else #define ATOMIC_VAR_INIT(value) { .__val = (value) } #define atomic_init(obj, value) ((void)((obj)->__val = (value))) #endif #endif /* * Clang and recent GCC both provide predefined macros for the memory * orderings. If we are using a compiler that doesn't define them, use the * clang values - these will be ignored in the fallback path. */ #ifndef __ATOMIC_RELAXED #define __ATOMIC_RELAXED 0 #endif #ifndef __ATOMIC_CONSUME #define __ATOMIC_CONSUME 1 #endif #ifndef __ATOMIC_ACQUIRE #define __ATOMIC_ACQUIRE 2 #endif #ifndef __ATOMIC_RELEASE #define __ATOMIC_RELEASE 3 #endif #ifndef __ATOMIC_ACQ_REL #define __ATOMIC_ACQ_REL 4 #endif #ifndef __ATOMIC_SEQ_CST #define __ATOMIC_SEQ_CST 5 #endif /* * 7.17.3 Order and consistency. * * The pm_memory_order_* constants that denote the barrier behaviour of the * atomic operations. */ typedef enum { pm_memory_order_relaxed = __ATOMIC_RELAXED, pm_memory_order_consume = __ATOMIC_CONSUME, pm_memory_order_acquire = __ATOMIC_ACQUIRE, pm_memory_order_release = __ATOMIC_RELEASE, pm_memory_order_acq_rel = __ATOMIC_ACQ_REL, pm_memory_order_seq_cst = __ATOMIC_SEQ_CST } pm_memory_order; /* * 7.17.4 Fences. */ static __inline void pm_atomic_thread_fence(pm_memory_order __order __attribute__((__unused__))) { #ifdef __PM_CLANG_ATOMICS __c11_atomic_thread_fence(__order); #elif defined(__PM_GNUC_ATOMICS) __atomic_thread_fence(__order); #else __sync_synchronize(); #endif } static __inline void pm_atomic_signal_fence(pm_memory_order __order __attribute__((__unused__))) { #ifdef __PM_CLANG_ATOMICS __c11_atomic_signal_fence(__order); #elif defined(__PM_GNUC_ATOMICS) __atomic_signal_fence(__order); #else __asm volatile ("" ::: "memory"); #endif } /* * 7.17.5 Lock-free property. */ #if 0 #if defined(_KERNEL) /* Atomics in kernelspace are always lock-free. */ #define atomic_is_lock_free(obj) \ ((void)(obj), (bool)1) #elif defined(__PM_CLANG_ATOMICS) #define atomic_is_lock_free(obj) \ __atomic_is_lock_free(sizeof(*(obj)), obj) #elif defined(__PM_GNUC_ATOMICS) #define atomic_is_lock_free(obj) \ __atomic_is_lock_free(sizeof((obj)->__val), &(obj)->__val) #else #define atomic_is_lock_free(obj) \ ((void)(obj), sizeof((obj)->__val) <= sizeof(void *)) #endif #endif /* * 7.17.6 Atomic integer types. */ #if 0 typedef _Atomic(bool) atomic_bool; typedef _Atomic(char) atomic_char; typedef _Atomic(signed char) atomic_schar; typedef _Atomic(unsigned char) atomic_uchar; typedef _Atomic(short) atomic_short; typedef _Atomic(unsigned short) atomic_ushort; typedef _Atomic(int) atomic_int; typedef _Atomic(unsigned int) atomic_uint; typedef _Atomic(long) atomic_long; typedef _Atomic(unsigned long) atomic_ulong; typedef _Atomic(long long) atomic_llong; typedef _Atomic(unsigned long long) atomic_ullong; typedef _Atomic(__char16_t) atomic_char16_t; typedef _Atomic(__char32_t) atomic_char32_t; typedef _Atomic(___wchar_t) atomic_wchar_t; typedef _Atomic(__int_least8_t) atomic_int_least8_t; typedef _Atomic(__uint_least8_t) atomic_uint_least8_t; typedef _Atomic(__int_least16_t) atomic_int_least16_t; typedef _Atomic(__uint_least16_t) atomic_uint_least16_t; typedef _Atomic(__int_least32_t) atomic_int_least32_t; typedef _Atomic(__uint_least32_t) atomic_uint_least32_t; typedef _Atomic(__int_least64_t) atomic_int_least64_t; typedef _Atomic(__uint_least64_t) atomic_uint_least64_t; typedef _Atomic(__int_fast8_t) atomic_int_fast8_t; typedef _Atomic(__uint_fast8_t) atomic_uint_fast8_t; typedef _Atomic(__int_fast16_t) atomic_int_fast16_t; typedef _Atomic(__uint_fast16_t) atomic_uint_fast16_t; typedef _Atomic(__int_fast32_t) atomic_int_fast32_t; typedef _Atomic(__uint_fast32_t) atomic_uint_fast32_t; typedef _Atomic(__int_fast64_t) atomic_int_fast64_t; typedef _Atomic(__uint_fast64_t) atomic_uint_fast64_t; typedef _Atomic(__intptr_t) atomic_intptr_t; typedef _Atomic(__uintptr_t) atomic_uintptr_t; typedef _Atomic(__size_t) atomic_size_t; typedef _Atomic(__ptrdiff_t) atomic_ptrdiff_t; typedef _Atomic(__intmax_t) atomic_intmax_t; typedef _Atomic(__uintmax_t) atomic_uintmax_t; #endif /* * 7.17.7 Operations on atomic types. */ /* * Compiler-specific operations. */ #if defined(__PM_CLANG_ATOMICS) #define pm_atomic_compare_exchange_strong_explicit(object, expected, \ desired, success, failure) \ __c11_atomic_compare_exchange_strong(object, expected, desired, \ success, failure) #define pm_atomic_compare_exchange_weak_explicit(object, expected, \ desired, success, failure) \ __c11_atomic_compare_exchange_weak(object, expected, desired, \ success, failure) #define pm_atomic_exchange_explicit(object, desired, order) \ __c11_atomic_exchange(object, desired, order) #define pm_atomic_fetch_add_explicit(object, operand, order) \ __c11_atomic_fetch_add(object, operand, order) #define pm_atomic_fetch_and_explicit(object, operand, order) \ __c11_atomic_fetch_and(object, operand, order) #define pm_atomic_fetch_or_explicit(object, operand, order) \ __c11_atomic_fetch_or(object, operand, order) #define pm_atomic_fetch_sub_explicit(object, operand, order) \ __c11_atomic_fetch_sub(object, operand, order) #define pm_atomic_fetch_xor_explicit(object, operand, order) \ __c11_atomic_fetch_xor(object, operand, order) #define pm_atomic_load_explicit(object, order) \ __c11_atomic_load(object, order) #define pm_atomic_store_explicit(object, desired, order) \ __c11_atomic_store(object, desired, order) #elif defined(__PM_GNUC_ATOMICS) #define pm_atomic_compare_exchange_strong_explicit(object, expected, \ desired, success, failure) \ __atomic_compare_exchange_n(object, expected, \ desired, 0, success, failure) #define pm_atomic_compare_exchange_weak_explicit(object, expected, \ desired, success, failure) \ __atomic_compare_exchange_n(object, expected, \ desired, 1, success, failure) #define pm_atomic_exchange_explicit(object, desired, order) \ __atomic_exchange_n(object, desired, order) #define pm_atomic_fetch_add_explicit(object, operand, order) \ __atomic_fetch_add(object, operand, order) #define pm_atomic_fetch_and_explicit(object, operand, order) \ __atomic_fetch_and(object, operand, order) #define pm_atomic_fetch_or_explicit(object, operand, order) \ __atomic_fetch_or(object, operand, order) #define pm_atomic_fetch_sub_explicit(object, operand, order) \ __atomic_fetch_sub(object, operand, order) #define pm_atomic_fetch_xor_explicit(object, operand, order) \ __atomic_fetch_xor(object, operand, order) #define pm_atomic_load_explicit(object, order) \ __atomic_load_n(object, order) #define pm_atomic_store_explicit(object, desired, order) \ __atomic_store_n(object, desired, order) #else #define __pm_atomic_apply_stride(object, operand) \ (((__typeof__(*(object)))0) + (operand)) #define pm_atomic_compare_exchange_strong_explicit(object, expected, \ desired, success, failure) __extension__ ({ \ __typeof__(expected) __ep = (expected); \ __typeof__(*__ep) __e = *__ep; \ (void)(success); (void)(failure); \ (bool)((*__ep = __sync_val_compare_and_swap(object, \ __e, desired)) == __e); \ }) #define pm_atomic_compare_exchange_weak_explicit(object, expected, \ desired, success, failure) \ pm_atomic_compare_exchange_strong_explicit(object, expected, \ desired, success, failure) #if __has_builtin(__sync_swap) /* Clang provides a full-barrier atomic exchange - use it if available. */ #define pm_atomic_exchange_explicit(object, desired, order) \ ((void)(order), __sync_swap(object, desired)) #else /* * __sync_lock_test_and_set() is only an acquire barrier in theory (although in * practice it is usually a full barrier) so we need an explicit barrier before * it. */ #define pm_atomic_exchange_explicit(object, desired, order) \ __extension__ ({ \ __typeof__(object) __o = (object); \ __typeof__(desired) __d = (desired); \ (void)(order); \ __sync_synchronize(); \ __sync_lock_test_and_set(__o, __d); \ }) #endif #define pm_atomic_fetch_add_explicit(object, operand, order) \ ((void)(order), __sync_fetch_and_add(object, \ __pm_atomic_apply_stride(object, operand))) #define pm_atomic_fetch_and_explicit(object, operand, order) \ ((void)(order), __sync_fetch_and_and(object, operand)) #define pm_atomic_fetch_or_explicit(object, operand, order) \ ((void)(order), __sync_fetch_and_or(object, operand)) #define pm_atomic_fetch_sub_explicit(object, operand, order) \ ((void)(order), __sync_fetch_and_sub(object, \ __pm_atomic_apply_stride(object, operand))) #define pm_atomic_fetch_xor_explicit(object, operand, order) \ ((void)(order), __sync_fetch_and_xor(object, operand)) #define pm_atomic_load_explicit(object, order) \ ((void)(order), __sync_fetch_and_add(object, 0)) #define pm_atomic_store_explicit(object, desired, order) \ ((void)pm_atomic_exchange_explicit(object, desired, order)) #endif /* * Convenience functions. * * Don't provide these in kernel space. In kernel space, we should be * disciplined enough to always provide explicit barriers. */ #ifndef _KERNEL #define pm_atomic_compare_exchange_strong(object, expected, desired) \ pm_atomic_compare_exchange_strong_explicit(object, expected, \ desired, pm_memory_order_seq_cst, pm_memory_order_seq_cst) #define pm_atomic_compare_exchange_weak(object, expected, desired) \ pm_atomic_compare_exchange_weak_explicit(object, expected, \ desired, pm_memory_order_seq_cst, pm_memory_order_seq_cst) #define pm_atomic_exchange(object, desired) \ pm_atomic_exchange_explicit(object, desired, pm_memory_order_seq_cst) #define pm_atomic_fetch_add(object, operand) \ pm_atomic_fetch_add_explicit(object, operand, pm_memory_order_seq_cst) #define pm_atomic_fetch_and(object, operand) \ pm_atomic_fetch_and_explicit(object, operand, pm_memory_order_seq_cst) #define pm_atomic_fetch_or(object, operand) \ pm_atomic_fetch_or_explicit(object, operand, pm_memory_order_seq_cst) #define pm_atomic_fetch_sub(object, operand) \ pm_atomic_fetch_sub_explicit(object, operand, pm_memory_order_seq_cst) #define pm_atomic_fetch_xor(object, operand) \ pm_atomic_fetch_xor_explicit(object, operand, pm_memory_order_seq_cst) #define pm_atomic_load(object) \ pm_atomic_load_explicit(object, pm_memory_order_seq_cst) #define pm_atomic_store(object, desired) \ pm_atomic_store_explicit(object, desired, pm_memory_order_seq_cst) #endif /* !_KERNEL */ /* * 7.17.8 Atomic flag type and operations. * * XXX: Assume atomic_bool can be used as an atomic_flag. Is there some * kind of compiler built-in type we could use? */ #if 0 typedef struct { atomic_bool __flag; } atomic_flag; #define ATOMIC_FLAG_INIT { ATOMIC_VAR_INIT(0) } static __inline bool atomic_flag_test_and_set_explicit(volatile atomic_flag *__object, pm_memory_order __order) { return (pm_atomic_exchange_explicit(&__object->__flag, 1, __order)); } static __inline void atomic_flag_clear_explicit(volatile atomic_flag *__object, pm_memory_order __order) { pm_atomic_store_explicit(&__object->__flag, 0, __order); } #ifndef _KERNEL static __inline bool atomic_flag_test_and_set(volatile atomic_flag *__object) { return (atomic_flag_test_and_set_explicit(__object, pm_memory_order_seq_cst)); } static __inline void atomic_flag_clear(volatile atomic_flag *__object) { atomic_flag_clear_explicit(__object, pm_memory_order_seq_cst); } #endif /* !_KERNEL */ #endif #endif /* !_STDATOMIC_H_ */ tarantool_1.6.7.588.g76bbd9c/third_party/tarantool_eio.h0000664000000000000000000000331112634006617021507 0ustar rootroot#ifndef TARANTOOL_EIO_H_INCLUDED #define TARANTOOL_EIO_H_INCLUDED /* * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * 1. Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include /* Definition of AT_* constants */ #include #include #include #include #include #if defined(ENABLE_BUNDLED_LIBEIO) #include "third_party/libeio/eio.h" #else /* !defined(ENABLE_BUNDLED_LIBEIO) */ #include #endif #endif /* TARANTOOL_EIO_H_INCLUDED */ tarantool_1.6.7.588.g76bbd9c/third_party/base64.h0000664000000000000000000000540112634006617017736 0ustar rootroot#ifndef BASE64_H #define BASE64_H /* * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * 1. Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * This is part of the libb64 project, and has been placed in the * public domain. For details, see * http://sourceforge.net/projects/libb64 */ #ifdef __cplusplus extern "C" { #endif #define BASE64_CHARS_PER_LINE 72 inline int base64_bufsize(int binsize) { int datasize = binsize * 4/3 + 4; int newlines = ((datasize + BASE64_CHARS_PER_LINE - 1)/ BASE64_CHARS_PER_LINE); return datasize + newlines; } /** * Encode a binary stream into BASE64 text. * * @pre the buffer size is at least 4/3 of the stream * size + stream_size/72 (newlines) + 4 * * @param[in] in_bin the binary input stream to decode * @param[in] in_len size of the input * @param[out] out_base64 output buffer for the encoded data * @param[in] out_len buffer size, must be at least * 4/3 of the input size * * @return the size of encoded output */ int base64_encode(const char *in_bin, int in_len, char *out_base64, int out_len); /** * Decode a BASE64 text into a binary * * @param[in] in_base64 the BASE64 stream to decode * @param[in] in_len size of the input * @param[out] out_bin output buffer size * @param[in] out_len buffer size * * @pre the output buffer size must be at least * 3/4 + 1 of the size of the input * * @return the size of decoded output */ int base64_decode(const char *in_base64, int in_len, char *out_bin, int out_len); #ifdef __cplusplus } /* extern "C" */ #endif #endif /* BASE64_H */ tarantool_1.6.7.588.g76bbd9c/third_party/memrchr.c0000664000000000000000000000351012634006617020301 0ustar rootroot/* $NetBSD: memrchr.c,v 1.2 2009/04/11 21:42:16 christos Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include void * memrchr(const void *s, int c, size_t n) { assert(s != NULL); if (n != 0) { const unsigned char *p = (const unsigned char *)s + n; const unsigned char cmp = c; do { if (*--p == cmp) return (void *) p; } while (--n != 0); } return NULL; } tarantool_1.6.7.588.g76bbd9c/third_party/qsort_arg_mt.c0000664000000000000000000001354012634006617021351 0ustar rootroot/* * Imported from PostgreSQL sources by Teodor Sigaev , */ /* * qsort_arg.c: qsort with a passthrough "void *" argument * * Modifications from vanilla NetBSD source: * Add do ... while() macro fix * Remove __inline, _DIAGASSERTs, __P * Remove ill-considered "swap_cnt" switch to insertion sort, * in favor of a simple check for presorted input. * * CAUTION: if you change this file, see also qsort.c * * $PostgreSQL: pgsql/src/port/qsort_arg.c,v 1.4 2007/03/18 05:36:50 neilc Exp $ */ /* $NetBSD: qsort.c,v 1.13 2003/08/07 16:43:42 agc Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #if defined(__cplusplus) extern "C" { #endif /* defined(__cplusplus) */ #define min(a, b) (a) < (b) ? a : b static char *med3(char *a, char *b, char *c, int (*cmp)(const void *a, const void *b, void *arg), void *arg); static void swapfunc(char *, char *, size_t, int); /* * Qsort routine based on J. L. Bentley and M. D. McIlroy, * "Engineering a sort function", * Software--Practice and Experience 23 (1993) 1249-1265. * We have modified their original by adding a check for already-sorted input, * which seems to be a win per discussions on pgsql-hackers around 2006-03-21. */ #define swapcode(TYPE, parmi, parmj, n) \ do { \ size_t i = (n) / sizeof (TYPE); \ TYPE *pi = (TYPE *)(void *)(parmi); \ TYPE *pj = (TYPE *)(void *)(parmj); \ do { \ TYPE t = *pi; \ *pi++ = *pj; \ *pj++ = t; \ } while (--i > 0); \ } while (0) #define SWAPINIT(a, es) swaptype = ((char *)(a) - (char *)0) % sizeof(long) || \ (es) % sizeof(long) ? 2 : (es) == sizeof(long)? 0 : 1; static void swapfunc(char *a, char *b, size_t n, int swaptype) { if (swaptype <= 1) swapcode(long, a, b, n); else swapcode(char, a, b, n); } #define swap(a, b) \ if (swaptype == 0) { \ long t = *(long *)(void *)(a); \ *(long *)(void *)(a) = *(long *)(void *)(b); \ *(long *)(void *)(b) = t; \ } else \ swapfunc(a, b, es, swaptype) #define vecswap(a, b, n) if ((n) > 0) swapfunc((a), (b), (size_t)(n), swaptype) static char * med3(char *a, char *b, char *c, int (*cmp)(const void *a, const void *b, void *arg), void *arg) { return cmp(a, b, arg) < 0 ? (cmp(b, c, arg) < 0 ? b : (cmp(a, c, arg) < 0 ? c : a)) : (cmp(b, c, arg) > 0 ? b : (cmp(a, c, arg) < 0 ? a : c)); } static void qsort_arg_mt_internal(void *a, size_t n, size_t es, int (*cmp)(const void *a, const void *b, void *arg), void *arg) { char *pa, *pb, *pc, *pd, *pl, *pm, *pn; intptr_t d, r, swaptype, presorted; loop:SWAPINIT(a, es); if (n < 7) { for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) for (pl = pm; pl > (char *) a && cmp(pl - es, pl, arg) > 0; pl -= es) swap(pl, pl - es); return; } presorted = 1; for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) { if (cmp(pm - es, pm, arg) > 0) { presorted = 0; break; } } if (presorted) return; pm = (char *) a + (n / 2) * es; if (n > 7) { pl = (char *) a; pn = (char *) a + (n - 1) * es; if (n > 40) { d = (n / 8) * es; pl = med3(pl, pl + d, pl + 2 * d, cmp, arg); pm = med3(pm - d, pm, pm + d, cmp, arg); pn = med3(pn - 2 * d, pn - d, pn, cmp, arg); } pm = med3(pl, pm, pn, cmp, arg); } swap((char*)a, pm); pa = pb = (char *) a + es; pc = pd = (char *) a + (n - 1) * es; for (;;) { while (pb <= pc && (r = cmp(pb, a, arg)) <= 0) { if (r == 0) { swap(pa, pb); pa += es; } pb += es; } while (pb <= pc && (r = cmp(pc, a, arg)) >= 0) { if (r == 0) { swap(pc, pd); pd -= es; } pc -= es; } if (pb > pc) break; swap(pb, pc); pb += es; pc -= es; } pn = (char *) a + n * es; r = min(pa - (char *) a, pb - pa); vecswap((char*)a, pb - r, r); r = min(pd - pc, pn - pd - es); vecswap(pb, pn - r, r); if ((r = pb - pa) > es) { #pragma omp task qsort_arg_mt_internal(a, r / es, es, cmp, arg); } if ((r = pd - pc) > es) { /* Iterate rather than recurse to save stack space */ a = pn - r; n = r / es; goto loop; } } void qsort_arg(void *a, size_t n, size_t es, int (*cmp)(const void *a, const void *b, void *arg), void *arg) { #pragma omp parallel { #pragma omp single qsort_arg_mt_internal(a, n, es, cmp, arg); } } #if defined(__cplusplus) } #endif /* defined(__cplusplus) */ tarantool_1.6.7.588.g76bbd9c/third_party/libeio/0000775000000000000000000000000012634006617017744 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/libeio/missing0000775000000000000000000002370312634006617021350 0ustar rootroot#! /bin/sh # Common stub for a few missing GNU programs while installing. scriptversion=2012-01-06.18; # UTC # Copyright (C) 1996-2012 Free Software Foundation, Inc. # Originally by Fran,cois Pinard , 1996. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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You may also peek at any GNU archive site, in case some other package would contain this missing '$1' program." exit 1 ;; esac exit 0 # Local variables: # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: tarantool_1.6.7.588.g76bbd9c/third_party/libeio/ecb.h0000664000000000000000000007507212634006617020661 0ustar rootroot/* * libecb - http://software.schmorp.de/pkg/libecb * * Copyright (©) 2009-2015 Marc Alexander Lehmann * Copyright (©) 2011 Emanuele Giaquinta * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef ECB_H #define ECB_H /* 16 bits major, 16 bits minor */ #define ECB_VERSION 0x00010004 #ifdef _WIN32 typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed short int16_t; typedef unsigned short uint16_t; typedef signed int int32_t; typedef unsigned int uint32_t; #if __GNUC__ typedef signed long long int64_t; typedef unsigned long long uint64_t; #else /* _MSC_VER || __BORLANDC__ */ typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; #endif #ifdef _WIN64 #define ECB_PTRSIZE 8 typedef uint64_t uintptr_t; typedef int64_t intptr_t; #else #define ECB_PTRSIZE 4 typedef uint32_t uintptr_t; typedef int32_t intptr_t; #endif #else #include #if UINTMAX_MAX > 0xffffffffU #define ECB_PTRSIZE 8 #else #define ECB_PTRSIZE 4 #endif #endif #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) /* work around x32 idiocy by defining proper macros */ #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 #if _ILP32 #define ECB_AMD64_X32 1 #else #define ECB_AMD64 1 #endif #endif /* many compilers define _GNUC_ to some versions but then only implement * what their idiot authors think are the "more important" extensions, * causing enormous grief in return for some better fake benchmark numbers. * or so. * we try to detect these and simply assume they are not gcc - if they have * an issue with that they should have done it right in the first place. */ #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ #define ECB_GCC_VERSION(major,minor) 0 #else #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) #endif #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) #if __clang__ && defined __has_builtin #define ECB_CLANG_BUILTIN(x) __has_builtin (x) #else #define ECB_CLANG_BUILTIN(x) 0 #endif #if __clang__ && defined __has_extension #define ECB_CLANG_EXTENSION(x) __has_extension (x) #else #define ECB_CLANG_EXTENSION(x) 0 #endif #define ECB_CPP (__cplusplus+0) #define ECB_CPP11 (__cplusplus >= 201103L) #if ECB_CPP #define ECB_C 0 #define ECB_STDC_VERSION 0 #else #define ECB_C 1 #define ECB_STDC_VERSION __STDC_VERSION__ #endif #define ECB_C99 (ECB_STDC_VERSION >= 199901L) #define ECB_C11 (ECB_STDC_VERSION >= 201112L) #if ECB_CPP #define ECB_EXTERN_C extern "C" #define ECB_EXTERN_C_BEG ECB_EXTERN_C { #define ECB_EXTERN_C_END } #else #define ECB_EXTERN_C extern #define ECB_EXTERN_C_BEG #define ECB_EXTERN_C_END #endif /*****************************************************************************/ /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ #if ECB_NO_THREADS #define ECB_NO_SMP 1 #endif #if ECB_NO_SMP #define ECB_MEMORY_FENCE do { } while (0) #endif /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ #if __xlC__ && ECB_CPP #include #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #if __i386 || __i386__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif ECB_GCC_AMD64 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") #elif __aarch64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") #elif defined __alpha__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") #elif defined __hppa__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif defined __ia64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") #elif defined __m68k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #elif defined __m88k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") #elif defined __sh__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #endif #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(4,7) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) #elif ECB_CLANG_EXTENSION(c_atomic) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () #elif _MSC_VER >= 1500 /* VC++ 2008 */ /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() #elif _MSC_VER >= 1400 /* VC++ 2005 */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier () #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () #elif defined _WIN32 #include #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #include #define ECB_MEMORY_FENCE __machine_rw_barrier () #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () #elif __xlC__ #define ECB_MEMORY_FENCE __sync () #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_C11 && !defined __STDC_NO_ATOMICS__ /* we assume that these memory fences work on all variables/all memory accesses, */ /* not just C11 atomics and atomic accesses */ #include /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ /* any fence other than seq_cst, which isn't very efficient for us. */ /* Why that is, we don't know - either the C11 memory model is quite useless */ /* for most usages, or gcc and clang have a bug */ /* I *currently* lean towards the latter, and inefficiently implement */ /* all three of ecb's fences as a seq_cst fence */ /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ /* for all __atomic_thread_fence's except seq_cst */ #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) #endif #endif #ifndef ECB_MEMORY_FENCE #if !ECB_AVOID_PTHREADS /* * if you get undefined symbol references to pthread_mutex_lock, * or failure to find pthread.h, then you should implement * the ECB_MEMORY_FENCE operations for your cpu/compiler * OR provide pthread.h and link against the posix thread library * of your system. */ #include #define ECB_NEEDS_PTHREADS 1 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) #endif #endif #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE #endif #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE #endif /*****************************************************************************/ #if ECB_CPP #define ecb_inline static inline #elif ECB_GCC_VERSION(2,5) #define ecb_inline static __inline__ #elif ECB_C99 #define ecb_inline static inline #else #define ecb_inline static #endif #if ECB_GCC_VERSION(3,3) #define ecb_restrict __restrict__ #elif ECB_C99 #define ecb_restrict restrict #else #define ecb_restrict #endif typedef int ecb_bool; #define ECB_CONCAT_(a, b) a ## b #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) #define ECB_STRINGIFY_(a) # a #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) #define ecb_function_ ecb_inline #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) #define ecb_attribute(attrlist) __attribute__ (attrlist) #else #define ecb_attribute(attrlist) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) #define ecb_is_constant(expr) __builtin_constant_p (expr) #else /* possible C11 impl for integral types typedef struct ecb_is_constant_struct ecb_is_constant_struct; #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ #define ecb_is_constant(expr) 0 #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) #else #define ecb_expect(expr,value) (expr) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) #else #define ecb_prefetch(addr,rw,locality) #endif /* no emulation for ecb_decltype */ #if ECB_CPP11 // older implementations might have problems with decltype(x)::type, work around it template struct ecb_decltype_t { typedef T type; }; #define ecb_decltype(x) ecb_decltype_t::type #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) #define ecb_decltype(x) __typeof__ (x) #endif #if _MSC_VER >= 1300 #define ecb_deprecated __declspec (deprecated) #else #define ecb_deprecated ecb_attribute ((__deprecated__)) #endif #if _MSC_VER >= 1500 #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) #elif ECB_GCC_VERSION(4,5) #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) #else #define ecb_deprecated_message(msg) ecb_deprecated #endif #if _MSC_VER >= 1400 #define ecb_noinline __declspec (noinline) #else #define ecb_noinline ecb_attribute ((__noinline__)) #endif #define ecb_unused ecb_attribute ((__unused__)) #define ecb_const ecb_attribute ((__const__)) #define ecb_pure ecb_attribute ((__pure__)) #if ECB_C11 || __IBMC_NORETURN /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ #define ecb_noreturn _Noreturn #elif ECB_CPP11 #define ecb_noreturn [[noreturn]] #elif _MSC_VER >= 1200 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ #define ecb_noreturn __declspec (noreturn) #else #define ecb_noreturn ecb_attribute ((__noreturn__)) #endif #if ECB_GCC_VERSION(4,3) #define ecb_artificial ecb_attribute ((__artificial__)) #define ecb_hot ecb_attribute ((__hot__)) #define ecb_cold ecb_attribute ((__cold__)) #else #define ecb_artificial #define ecb_hot #define ecb_cold #endif /* put around conditional expressions if you are very sure that the */ /* expression is mostly true or mostly false. note that these return */ /* booleans, not the expression. */ #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) /* for compatibility to the rest of the world */ #define ecb_likely(expr) ecb_expect_true (expr) #define ecb_unlikely(expr) ecb_expect_false (expr) /* count trailing zero bits and count # of one bits */ #if ECB_GCC_VERSION(3,4) \ || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ && ECB_CLANG_BUILTIN(__builtin_popcount)) /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ #define ecb_ld32(x) (__builtin_clz (x) ^ 31) #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) #define ecb_ctz32(x) __builtin_ctz (x) #define ecb_ctz64(x) __builtin_ctzll (x) #define ecb_popcount32(x) __builtin_popcount (x) /* no popcountll */ #else ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); ecb_function_ ecb_const int ecb_ctz32 (uint32_t x) { int r = 0; x &= ~x + 1; /* this isolates the lowest bit */ #if ECB_branchless_on_i386 r += !!(x & 0xaaaaaaaa) << 0; r += !!(x & 0xcccccccc) << 1; r += !!(x & 0xf0f0f0f0) << 2; r += !!(x & 0xff00ff00) << 3; r += !!(x & 0xffff0000) << 4; #else if (x & 0xaaaaaaaa) r += 1; if (x & 0xcccccccc) r += 2; if (x & 0xf0f0f0f0) r += 4; if (x & 0xff00ff00) r += 8; if (x & 0xffff0000) r += 16; #endif return r; } ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); ecb_function_ ecb_const int ecb_ctz64 (uint64_t x) { int shift = x & 0xffffffffU ? 0 : 32; return ecb_ctz32 (x >> shift) + shift; } ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); ecb_function_ ecb_const int ecb_popcount32 (uint32_t x) { x -= (x >> 1) & 0x55555555; x = ((x >> 2) & 0x33333333) + (x & 0x33333333); x = ((x >> 4) + x) & 0x0f0f0f0f; x *= 0x01010101; return x >> 24; } ecb_function_ ecb_const int ecb_ld32 (uint32_t x); ecb_function_ ecb_const int ecb_ld32 (uint32_t x) { int r = 0; if (x >> 16) { x >>= 16; r += 16; } if (x >> 8) { x >>= 8; r += 8; } if (x >> 4) { x >>= 4; r += 4; } if (x >> 2) { x >>= 2; r += 2; } if (x >> 1) { r += 1; } return r; } ecb_function_ ecb_const int ecb_ld64 (uint64_t x); ecb_function_ ecb_const int ecb_ld64 (uint64_t x) { int r = 0; if (x >> 32) { x >>= 32; r += 32; } return r + ecb_ld32 (x); } #endif ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) { return ( (x * 0x0802U & 0x22110U) | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; } ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) { x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); x = ( x >> 8 ) | ( x << 8); return x; } ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) { x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); x = ( x >> 16 ) | ( x << 16); return x; } /* popcount64 is only available on 64 bit cpus as gcc builtin */ /* so for this version we are lazy */ ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); ecb_function_ ecb_const int ecb_popcount64 (uint64_t x) { return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); } ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) #define ecb_bswap16(x) __builtin_bswap16 (x) #else #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) #endif #define ecb_bswap32(x) __builtin_bswap32 (x) #define ecb_bswap64(x) __builtin_bswap64 (x) #elif _MSC_VER #include #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) #else ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x) { return ecb_rotl16 (x, 8); } ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x) { return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); } ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x) { return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); } #endif #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) #define ecb_unreachable() __builtin_unreachable () #else /* this seems to work fine, but gcc always emits a warning for it :/ */ ecb_inline ecb_noreturn void ecb_unreachable (void); ecb_inline ecb_noreturn void ecb_unreachable (void) { } #endif /* try to tell the compiler that some condition is definitely true */ #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); ecb_inline ecb_const unsigned char ecb_byteorder_helper (void) { /* the union code still generates code under pressure in gcc, */ /* but less than using pointers, and always seems to */ /* successfully return a constant. */ /* the reason why we have this horrible preprocessor mess */ /* is to avoid it in all cases, at least on common architectures */ /* or when using a recent enough gcc version (>= 4.6) */ #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64 return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ return 0x11; #else union { uint32_t i; uint8_t c; } u = { 0x11223344 }; return u.c; #endif } ecb_inline ecb_const ecb_bool ecb_big_endian (void); ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } ecb_inline ecb_const ecb_bool ecb_little_endian (void); ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } #if ECB_GCC_VERSION(3,0) || ECB_C99 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) #else #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) #endif #if ECB_CPP template static inline T ecb_div_rd (T val, T div) { return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; } template static inline T ecb_div_ru (T val, T div) { return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; } #else #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) #endif #if ecb_cplusplus_does_not_suck /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ template static inline int ecb_array_length (const T (&arr)[N]) { return N; } #else #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) #endif /*******************************************************************************/ /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ /* basically, everything uses "ieee pure-endian" floating point numbers */ /* the only noteworthy exception is ancient armle, which uses order 43218765 */ #if 0 \ || __i386 || __i386__ \ || ECB_GCC_AMD64 \ || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ || defined __s390__ || defined __s390x__ \ || defined __mips__ \ || defined __alpha__ \ || defined __hppa__ \ || defined __ia64__ \ || defined __m68k__ \ || defined __m88k__ \ || defined __sh__ \ || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ || defined __aarch64__ #define ECB_STDFP 1 #include /* for memcpy */ #else #define ECB_STDFP 0 #endif #ifndef ECB_NO_LIBM #include /* for frexp*, ldexp*, INFINITY, NAN */ /* only the oldest of old doesn't have this one. solaris. */ #ifdef INFINITY #define ECB_INFINITY INFINITY #else #define ECB_INFINITY HUGE_VAL #endif #ifdef NAN #define ECB_NAN NAN #else #define ECB_NAN ECB_INFINITY #endif #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L #define ecb_ldexpf(x,e) ldexpf ((x), (e)) #define ecb_frexpf(x,e) frexpf ((x), (e)) #else #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) #endif /* converts an ieee half/binary16 to a float */ ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x) { int e = (x >> 10) & 0x1f; int m = x & 0x3ff; float r; if (!e ) r = ecb_ldexpf (m , -24); else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); else if (m ) r = ECB_NAN; else r = ECB_INFINITY; return x & 0x8000 ? -r : r; } /* convert a float to ieee single/binary32 */ ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x) { uint32_t r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* slow emulation, works for anything but -0 */ uint32_t m; int e; if (x == 0e0f ) return 0x00000000U; if (x > +3.40282346638528860e+38f) return 0x7f800000U; if (x < -3.40282346638528860e+38f) return 0xff800000U; if (x != x ) return 0x7fbfffffU; m = ecb_frexpf (x, &e) * 0x1000000U; r = m & 0x80000000U; if (r) m = -m; if (e <= -126) { m &= 0xffffffU; m >>= (-125 - e); e = -126; } r |= (e + 126) << 23; r |= m & 0x7fffffU; #endif return r; } /* converts an ieee single/binary32 to a float */ ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x) { float r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 31; int e = (x >> 23) & 0xffU; x &= 0x7fffffU; if (e) x |= 0x800000U; else e = 1; /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); r = neg ? -r : r; #endif return r; } /* convert a double to ieee double/binary64 */ ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x) { uint64_t r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* slow emulation, works for anything but -0 */ uint64_t m; int e; if (x == 0e0 ) return 0x0000000000000000U; if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; if (x != x ) return 0X7ff7ffffffffffffU; m = frexp (x, &e) * 0x20000000000000U; r = m & 0x8000000000000000;; if (r) m = -m; if (e <= -1022) { m &= 0x1fffffffffffffU; m >>= (-1021 - e); e = -1022; } r |= ((uint64_t)(e + 1022)) << 52; r |= m & 0xfffffffffffffU; #endif return r; } /* converts an ieee double/binary64 to a double */ ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x) { double r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 63; int e = (x >> 52) & 0x7ffU; x &= 0xfffffffffffffU; if (e) x |= 0x10000000000000U; else e = 1; /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); r = neg ? -r : r; #endif return r; } #endif #endif tarantool_1.6.7.588.g76bbd9c/third_party/libeio/CVS/0000775000000000000000000000000012634006617020377 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/libeio/CVS/Entries0000664000000000000000000000110112634006617021724 0ustar rootroot/Changes/1.54/Sun Oct 4 10:44:32 2015// /LICENSE/1.1/Mon Aug 17 17:43:15 2015// /Makefile.am/1.4/Mon Aug 17 17:43:15 2015// /autogen.sh/1.4/Mon Aug 17 17:43:15 2015// /configure.ac/1.10/Mon Aug 17 17:43:15 2015// /demo.c/1.4/Mon Aug 17 17:43:15 2015// /ecb.h/1.26/Sun Oct 4 10:44:32 2015// /eio.3/1.1/Mon Aug 17 17:43:15 2015// /eio.c/1.139/Sun Oct 4 10:44:32 2015// /eio.h/1.56/Sun Oct 4 10:44:32 2015// /eio.pod/1.35/Mon Aug 17 17:43:15 2015// /etp.c/1.10/Sun Oct 4 10:44:32 2015// /libeio.m4/1.23/Sun Oct 4 10:44:32 2015// /xthread.h/1.18/Sun Oct 4 10:44:32 2015// D tarantool_1.6.7.588.g76bbd9c/third_party/libeio/CVS/Repository0000664000000000000000000000000712634006617022476 0ustar rootrootlibeio tarantool_1.6.7.588.g76bbd9c/third_party/libeio/CVS/Root0000664000000000000000000000005712634006617021247 0ustar rootroot:pserver:anonymous@cvs.schmorp.de/schmorpforge tarantool_1.6.7.588.g76bbd9c/third_party/libeio/configure.ac0000664000000000000000000000044612634006617022236 0ustar rootrootAC_PREREQ(2.59) AC_INIT AC_CONFIG_SRCDIR([eio.h]) AC_CONFIG_HEADERS([config.h]) AM_INIT_AUTOMAKE(libeio,1.0) AM_MAINTAINER_MODE AC_GNU_SOURCE AC_PROG_LIBTOOL AC_PROG_CC if test "x$GCC" = xyes ; then CFLAGS="-O3 $CFLAGS" fi m4_include([libeio.m4]) AC_CONFIG_FILES([Makefile]) AC_OUTPUT tarantool_1.6.7.588.g76bbd9c/third_party/libeio/Makefile.in0000664000000000000000000005750412634006617022024 0ustar rootroot# Makefile.in generated by automake 1.12 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software # Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ VPATH = @srcdir@ am__make_dryrun = \ { \ am__dry=no; \ case $$MAKEFLAGS in \ *\\[\ \ ]*) \ echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \ | grep '^AM OK$$' >/dev/null || am__dry=yes;; \ *) \ for am__flg in $$MAKEFLAGS; do \ case $$am__flg in \ *=*|--*) ;; \ *n*) am__dry=yes; break;; \ esac; \ done;; \ esac; \ test $$am__dry = yes; \ } pkgdatadir = $(datadir)/@PACKAGE@ pkgincludedir = $(includedir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkglibexecdir = $(libexecdir)/@PACKAGE@ am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd install_sh_DATA = $(install_sh) -c -m 644 install_sh_PROGRAM = $(install_sh) -c install_sh_SCRIPT = $(install_sh) -c INSTALL_HEADER = $(INSTALL_DATA) transform = $(program_transform_name) NORMAL_INSTALL = : PRE_INSTALL = : POST_INSTALL = : NORMAL_UNINSTALL = : PRE_UNINSTALL = : POST_UNINSTALL = : build_triplet = @build@ host_triplet = @host@ subdir = . 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Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef ETP_API_DECL # define ETP_API_DECL static #endif #ifndef ETP_PRI_MIN # define ETP_PRI_MIN 0 # define ETP_PRI_MAX 0 #endif #ifndef ETP_TYPE_QUIT # define ETP_TYPE_QUIT 0 #endif #ifndef ETP_TYPE_GROUP # define ETP_TYPE_GROUP 1 #endif #ifndef ETP_WANT_POLL # define ETP_WANT_POLL(pool) pool->want_poll_cb (pool->userdata) #endif #ifndef ETP_DONE_POLL # define ETP_DONE_POLL(pool) pool->done_poll_cb (pool->userdata) #endif #define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) #define ETP_TICKS ((1000000 + 1023) >> 10) enum { ETP_FLAG_GROUPADD = 0x04, /* some request was added to the group */ ETP_FLAG_DELAYED = 0x08, /* groiup request has been delayed */ }; /* calculate time difference in ~1/ETP_TICKS of a second */ ecb_inline int etp_tvdiff (struct timeval *tv1, struct timeval *tv2) { return (tv2->tv_sec - tv1->tv_sec ) * ETP_TICKS + ((tv2->tv_usec - tv1->tv_usec) >> 10); } struct etp_tmpbuf { void *ptr; int len; }; static void * etp_tmpbuf_get (struct etp_tmpbuf *buf, int len) { if (buf->len < len) { free (buf->ptr); buf->ptr = malloc (buf->len = len); } return buf->ptr; } /* * a somewhat faster data structure might be nice, but * with 8 priorities this actually needs <20 insns * per shift, the most expensive operation. */ typedef struct { ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */ int size; } etp_reqq; typedef struct etp_pool *etp_pool; typedef struct etp_worker { etp_pool pool; struct etp_tmpbuf tmpbuf; /* locked by pool->wrklock */ struct etp_worker *prev, *next; xthread_t tid; #ifdef ETP_WORKER_COMMON ETP_WORKER_COMMON #endif } etp_worker; struct etp_pool { void *userdata; etp_reqq req_queue; etp_reqq res_queue; unsigned int started, idle, wanted; unsigned int max_poll_time; /* pool->reslock */ unsigned int max_poll_reqs; /* pool->reslock */ unsigned int nreqs; /* pool->reqlock */ unsigned int nready; /* pool->reqlock */ unsigned int npending; /* pool->reqlock */ unsigned int max_idle; /* maximum number of threads that can pool->idle indefinitely */ unsigned int idle_timeout; /* number of seconds after which an pool->idle threads exit */ void (*want_poll_cb) (void *userdata); void (*done_poll_cb) (void *userdata); xmutex_t wrklock; xmutex_t reslock; xmutex_t reqlock; xcond_t reqwait; etp_worker wrk_first; }; #define ETP_WORKER_LOCK(wrk) X_LOCK (pool->wrklock) #define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (pool->wrklock) /* worker threads management */ static void etp_worker_clear (etp_worker *wrk) { } static void ecb_cold etp_worker_free (etp_worker *wrk) { free (wrk->tmpbuf.ptr); wrk->next->prev = wrk->prev; wrk->prev->next = wrk->next; free (wrk); } ETP_API_DECL unsigned int etp_nreqs (etp_pool pool) { int retval; if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); retval = pool->nreqs; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); return retval; } ETP_API_DECL unsigned int etp_nready (etp_pool pool) { unsigned int retval; if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); retval = pool->nready; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); return retval; } ETP_API_DECL unsigned int etp_npending (etp_pool pool) { unsigned int retval; if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); retval = pool->npending; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); return retval; } ETP_API_DECL unsigned int etp_nthreads (etp_pool pool) { unsigned int retval; if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); retval = pool->started; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); return retval; } static void ecb_noinline ecb_cold reqq_init (etp_reqq *q) { int pri; for (pri = 0; pri < ETP_NUM_PRI; ++pri) q->qs[pri] = q->qe[pri] = 0; q->size = 0; } static int ecb_noinline reqq_push (etp_reqq *q, ETP_REQ *req) { int pri = req->pri; req->next = 0; if (q->qe[pri]) { q->qe[pri]->next = req; q->qe[pri] = req; } else q->qe[pri] = q->qs[pri] = req; return q->size++; } static ETP_REQ * ecb_noinline reqq_shift (etp_reqq *q) { int pri; if (!q->size) return 0; --q->size; for (pri = ETP_NUM_PRI; pri--; ) { ETP_REQ *req = q->qs[pri]; if (req) { if (!(q->qs[pri] = (ETP_REQ *)req->next)) q->qe[pri] = 0; return req; } } abort (); } ETP_API_DECL int ecb_cold etp_init (etp_pool pool, void *userdata, void (*want_poll)(void *userdata), void (*done_poll)(void *userdata)) { X_MUTEX_CREATE (pool->wrklock); X_MUTEX_CREATE (pool->reslock); X_MUTEX_CREATE (pool->reqlock); X_COND_CREATE (pool->reqwait); reqq_init (&pool->req_queue); reqq_init (&pool->res_queue); pool->wrk_first.next = pool->wrk_first.prev = &pool->wrk_first; pool->started = 0; pool->idle = 0; pool->nreqs = 0; pool->nready = 0; pool->npending = 0; pool->wanted = 4; pool->max_idle = 4; /* maximum number of threads that can pool->idle indefinitely */ pool->idle_timeout = 10; /* number of seconds after which an pool->idle threads exit */ pool->userdata = userdata; pool->want_poll_cb = want_poll; pool->done_poll_cb = done_poll; return 0; } static void ecb_noinline ecb_cold etp_proc_init (void) { #if HAVE_PRCTL_SET_NAME /* provide a more sensible "thread name" */ char name[16 + 1]; const int namelen = sizeof (name) - 1; int len; prctl (PR_GET_NAME, (unsigned long)name, 0, 0, 0); name [namelen] = 0; len = strlen (name); strcpy (name + (len <= namelen - 4 ? len : namelen - 4), "/eio"); prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0); #endif } X_THREAD_PROC (etp_proc) { ETP_REQ *req; struct timespec ts; etp_worker *self = (etp_worker *)thr_arg; etp_pool pool = self->pool; etp_proc_init (); /* try to distribute timeouts somewhat evenly */ ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); for (;;) { ts.tv_sec = 0; X_LOCK (pool->reqlock); for (;;) { req = reqq_shift (&pool->req_queue); if (ecb_expect_true (req)) break; if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */ { X_UNLOCK (pool->reqlock); X_LOCK (pool->wrklock); --pool->started; X_UNLOCK (pool->wrklock); goto quit; } ++pool->idle; if (pool->idle <= pool->max_idle) /* we are allowed to pool->idle, so do so without any timeout */ X_COND_WAIT (pool->reqwait, pool->reqlock); else { /* initialise timeout once */ if (!ts.tv_sec) ts.tv_sec = time (0) + pool->idle_timeout; if (X_COND_TIMEDWAIT (pool->reqwait, pool->reqlock, ts) == ETIMEDOUT) ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */ } --pool->idle; } --pool->nready; X_UNLOCK (pool->reqlock); if (ecb_expect_false (req->type == ETP_TYPE_QUIT)) goto quit; ETP_EXECUTE (self, req); X_LOCK (pool->reslock); ++pool->npending; if (!reqq_push (&pool->res_queue, req)) ETP_WANT_POLL (pool); etp_worker_clear (self); X_UNLOCK (pool->reslock); } quit: free (req); X_LOCK (pool->wrklock); etp_worker_free (self); X_UNLOCK (pool->wrklock); return 0; } static void ecb_cold etp_start_thread (etp_pool pool) { etp_worker *wrk = calloc (1, sizeof (etp_worker)); /*TODO*/ assert (("unable to allocate worker thread data", wrk)); wrk->pool = pool; X_LOCK (pool->wrklock); if (xthread_create (&wrk->tid, etp_proc, (void *)wrk)) { wrk->prev = &pool->wrk_first; wrk->next = pool->wrk_first.next; pool->wrk_first.next->prev = wrk; pool->wrk_first.next = wrk; ++pool->started; } else free (wrk); X_UNLOCK (pool->wrklock); } static void etp_maybe_start_thread (etp_pool pool) { if (ecb_expect_true (etp_nthreads (pool) >= pool->wanted)) return; /* todo: maybe use pool->idle here, but might be less exact */ if (ecb_expect_true (0 <= (int)etp_nthreads (pool) + (int)etp_npending (pool) - (int)etp_nreqs (pool))) return; etp_start_thread (pool); } static void ecb_cold etp_end_thread (etp_pool pool) { ETP_REQ *req = calloc (1, sizeof (ETP_REQ)); /* will be freed by worker */ req->type = ETP_TYPE_QUIT; req->pri = ETP_PRI_MAX - ETP_PRI_MIN; X_LOCK (pool->reqlock); reqq_push (&pool->req_queue, req); X_COND_SIGNAL (pool->reqwait); X_UNLOCK (pool->reqlock); X_LOCK (pool->wrklock); --pool->started; X_UNLOCK (pool->wrklock); } ETP_API_DECL int etp_poll (etp_pool pool) { unsigned int maxreqs; unsigned int maxtime; struct timeval tv_start, tv_now; X_LOCK (pool->reslock); maxreqs = pool->max_poll_reqs; maxtime = pool->max_poll_time; X_UNLOCK (pool->reslock); if (maxtime) gettimeofday (&tv_start, 0); for (;;) { ETP_REQ *req; etp_maybe_start_thread (pool); X_LOCK (pool->reslock); req = reqq_shift (&pool->res_queue); if (ecb_expect_true (req)) { --pool->npending; if (!pool->res_queue.size) ETP_DONE_POLL (pool); } X_UNLOCK (pool->reslock); if (ecb_expect_false (!req)) return 0; X_LOCK (pool->reqlock); --pool->nreqs; X_UNLOCK (pool->reqlock); if (ecb_expect_false (req->type == ETP_TYPE_GROUP && req->size)) { req->flags |= ETP_FLAG_DELAYED; /* mark request as delayed */ continue; } else { int res = ETP_FINISH (req); if (ecb_expect_false (res)) return res; } if (ecb_expect_false (maxreqs && !--maxreqs)) break; if (maxtime) { gettimeofday (&tv_now, 0); if (etp_tvdiff (&tv_start, &tv_now) >= maxtime) break; } } errno = EAGAIN; return -1; } ETP_API_DECL void etp_grp_cancel (etp_pool pool, ETP_REQ *grp); ETP_API_DECL void etp_cancel (etp_pool pool, ETP_REQ *req) { req->cancelled = 1; etp_grp_cancel (pool, req); } ETP_API_DECL void etp_grp_cancel (etp_pool pool, ETP_REQ *grp) { for (grp = grp->grp_first; grp; grp = grp->grp_next) etp_cancel (pool, grp); } ETP_API_DECL void etp_submit (etp_pool pool, ETP_REQ *req) { req->pri -= ETP_PRI_MIN; if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN; if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN; if (ecb_expect_false (req->type == ETP_TYPE_GROUP)) { /* I hope this is worth it :/ */ X_LOCK (pool->reqlock); ++pool->nreqs; X_UNLOCK (pool->reqlock); X_LOCK (pool->reslock); ++pool->npending; if (!reqq_push (&pool->res_queue, req)) ETP_WANT_POLL (pool); X_UNLOCK (pool->reslock); } else { X_LOCK (pool->reqlock); ++pool->nreqs; ++pool->nready; reqq_push (&pool->req_queue, req); X_COND_SIGNAL (pool->reqwait); X_UNLOCK (pool->reqlock); etp_maybe_start_thread (pool); } } ETP_API_DECL void ecb_cold etp_set_max_poll_time (etp_pool pool, double seconds) { if (WORDACCESS_UNSAFE) X_LOCK (pool->reslock); pool->max_poll_time = seconds * ETP_TICKS; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reslock); } ETP_API_DECL void ecb_cold etp_set_max_poll_reqs (etp_pool pool, unsigned int maxreqs) { if (WORDACCESS_UNSAFE) X_LOCK (pool->reslock); pool->max_poll_reqs = maxreqs; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reslock); } ETP_API_DECL void ecb_cold etp_set_max_idle (etp_pool pool, unsigned int threads) { if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); pool->max_idle = threads; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); } ETP_API_DECL void ecb_cold etp_set_idle_timeout (etp_pool pool, unsigned int seconds) { if (WORDACCESS_UNSAFE) X_LOCK (pool->reqlock); pool->idle_timeout = seconds; if (WORDACCESS_UNSAFE) X_UNLOCK (pool->reqlock); } ETP_API_DECL void ecb_cold etp_set_min_parallel (etp_pool pool, unsigned int threads) { if (pool->wanted < threads) pool->wanted = threads; } ETP_API_DECL void ecb_cold etp_set_max_parallel (etp_pool pool, unsigned int threads) { if (pool->wanted > threads) pool->wanted = threads; while (pool->started > pool->wanted) etp_end_thread (pool); } tarantool_1.6.7.588.g76bbd9c/third_party/libeio/Changes0000664000000000000000000001011412634006617021234 0ustar rootrootRevision history for libeio TODO: maybe add mincore support? available on at least darwin, solaris, linux, freebsd TODO: openbsd requires stdint.h for intptr_t - why posix? TODO: make mtouch/readdir maybe others cancellable in-request TODO: fadvise request TODO: fdopendir/utimensat TODO: maybe work around 3.996gb barrier in pread/pwrite as well, maybe readahead etc.? 1.0 - for simple request api, initialise result/errorno to -1/ECANCELED. - fix a deadlock where a wakeup signal could be missed when a timeout occured at the same time. - use nonstandard but maybe-working-on-bsd fork technique. - use fewer time() syscalls when waiting for new requests. - fix a path-memory-leak in readdir when using the wrappers (reported by Thomas L. Shinnick). - support a max_idle value of 0. - support setting of idle timeout value (eio_set_idle_timeout). - readdir: correctly handle malloc failures. - readdir: new flags argument, can return inode and possibly filetype, can sort in various ways. - readdir: stop immediately when cancelled, do not continue reading the directory. - fix return value of eio_sendfile_sync. - include sys/mman.h for msync. - added EIO_STACKSIZE. - added msync, mtouch support (untested). - added sync_file_range (untested). - fixed custom support. - use a more robust feed-add detection method. - "outbundled" from IO::AIO. - eio_set_max_polltime did not properly convert time to ticks. - tentatively support darwin in sendfile. - fix freebsd/darwin sendfile. - also use sendfile emulation for ENOTSUP and EOPNOTSUPP error codes. - add OS-independent EIO_MT_* and EIO_MS_* flag enums. - add eio_statvfs/eio_fstatvfs. - add eio_mlock/eio_mlockall and OS-independent MCL_* flag enums. - no longer set errno to 0 before making syscalls, this only lures people into the trap of believing errno shows success or failure. - "fix" demo.c so that it works as non-root. - suppoert utimes seperately from futimes, as some systems have utimes but not futimes. - use _POSIX_MEMLOCK_RANGE for mlock. - do not (errornously) overwrite CFLAGS in configure.ac. - mknod used int3 for dev_t (§2 bit), not offs (64 bit). - fix memory corruption in eio_readdirx for the flags combination EIO_READDIR_STAT_ORDER | EIO_READDIR_DIRS_FIRST. - port to openbsd (another blatantly broken non-UNIX/POSIX platform). - fix eio_custom prototype. - work around a Linux (and likely FreeBSD and other kernels) bug where sendfile would not transfer all the requested bytes on large transfers, using a heuristic. - use libecb, and apply lots of minor space optimisations. - disable sendfile on darwin, broken as everything else. - add realpath request and implementation. - cancelled requests will still invoke their request callbacks. - add fallocate. - do not acquire any locks when forking. - incorporated some mingw32 changes by traviscline. - added syncfs support, using direct syscall. - set thread name on linux (ps -L/Hcx, top, gdb). - remove useless use of volatile variables. - fix memory leak when reaping threads. - use utime now uses nanosecond resolution on posix 2008 systems. - allow taking advantage of posix 2008 xxxat functions and fdopendir by implementing a working directory abstraction. - make readahead emulation behave more like actual readahead by never failing. - added EIO_LSEEK (untested). - added EIO_FALLOC_FL_PUNCH_HOLE. - wtf. etp_proc returned 0, and no compiler ever complained. - remove pread/pwrite emulation, as the only system that lacked them (cygwin) provides them for a while now. - provide pread/pwrite implementations for win32. - implement aio_realpath for windows. - add EIO_FALLOC_FL_COLLAPSE_RANGE anbd EIO_FALLOC_FL_ZERO_RANGE. tarantool_1.6.7.588.g76bbd9c/third_party/libeio/LICENSE0000664000000000000000000000375712634006617020765 0ustar rootrootAll files in libeio are Copyright (C)2007,2008 Marc Alexander Lehmann. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Alternatively, the contents of this package may be used under the terms of the GNU General Public License ("GPL") version 2 or any later version, in which case the provisions of the GPL are applicable instead of the above. If you wish to allow the use of your version of this package only under the terms of the GPL and not to allow others to use your version of this file under the BSD license, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL in this and the other files of this package. If you do not delete the provisions above, a recipient may use your version of this file under either the BSD or the GPL. tarantool_1.6.7.588.g76bbd9c/third_party/libeio/eio.30000664000000000000000000046400212634006617020612 0ustar rootroot.\" Automatically generated by Pod::Man 2.16 (Pod::Simple 3.05) .\" .\" Standard preamble: .\" ======================================================================== .de Sh \" Subsection heading .br .if t .Sp .ne 5 .PP \fB\\$1\fR .PP .. .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Of course, you'll have to process the .\" output yourself in some meaningful fashion. .ie \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . nr % 0 . rr F .\} .el \{\ . de IX .. .\} .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "LIBEIO 3" .TH LIBEIO 3 "2008-05-11" "libeio-1.0" "libeio - truly asynchronous POSIX I/O" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" libev \- a high performance full\-featured event loop written in C .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include .Ve .Sh "\s-1EXAMPLE\s0 \s-1PROGRAM\s0" .IX Subsection "EXAMPLE PROGRAM" .Vb 2 \& // a single header file is required \& #include \& \& // every watcher type has its own typedef\*(Aqd struct \& // with the name ev_ \& ev_io stdin_watcher; \& ev_timer timeout_watcher; \& \& // all watcher callbacks have a similar signature \& // this callback is called when data is readable on stdin \& static void \& stdin_cb (EV_P_ struct ev_io *w, int revents) \& { \& puts ("stdin ready"); \& // for one\-shot events, one must manually stop the watcher \& // with its corresponding stop function. \& ev_io_stop (EV_A_ w); \& \& // this causes all nested ev_loop\*(Aqs to stop iterating \& ev_unloop (EV_A_ EVUNLOOP_ALL); \& } \& \& // another callback, this time for a time\-out \& static void \& timeout_cb (EV_P_ struct ev_timer *w, int revents) \& { \& puts ("timeout"); \& // this causes the innermost ev_loop to stop iterating \& ev_unloop (EV_A_ EVUNLOOP_ONE); \& } \& \& int \& main (void) \& { \& // use the default event loop unless you have special needs \& struct ev_loop *loop = ev_default_loop (0); \& \& // initialise an io watcher, then start it \& // this one will watch for stdin to become readable \& ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& \& // initialise a timer watcher, then start it \& // simple non\-repeating 5.5 second timeout \& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); \& ev_timer_start (loop, &timeout_watcher); \& \& // now wait for events to arrive \& ev_loop (loop, 0); \& \& // unloop was called, so exit \& return 0; \& } .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: . .PP Libev is an event loop: you register interest in certain events (such as a file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. .PP To do this, it must take more or less complete control over your process (or thread) by executing the \fIevent loop\fR handler, and will then communicate events via a callback mechanism. .PP You register interest in certain events by registering so-called \fIevent watchers\fR, which are relatively small C structures you initialise with the details of the event, and then hand it over to libev by \fIstarting\fR the watcher. .Sh "\s-1FEATURES\s0" .IX Subsection "FEATURES" Libev supports \f(CW\*(C`select\*(C'\fR, \f(CW\*(C`poll\*(C'\fR, the Linux-specific \f(CW\*(C`epoll\*(C'\fR, the BSD-specific \f(CW\*(C`kqueue\*(C'\fR and the Solaris-specific event port mechanisms for file descriptor events (\f(CW\*(C`ev_io\*(C'\fR), the Linux \f(CW\*(C`inotify\*(C'\fR interface (for \f(CW\*(C`ev_stat\*(C'\fR), relative timers (\f(CW\*(C`ev_timer\*(C'\fR), absolute timers with customised rescheduling (\f(CW\*(C`ev_periodic\*(C'\fR), synchronous signals (\f(CW\*(C`ev_signal\*(C'\fR), process status change events (\f(CW\*(C`ev_child\*(C'\fR), and event watchers dealing with the event loop mechanism itself (\f(CW\*(C`ev_idle\*(C'\fR, \&\f(CW\*(C`ev_embed\*(C'\fR, \f(CW\*(C`ev_prepare\*(C'\fR and \f(CW\*(C`ev_check\*(C'\fR watchers) as well as file watchers (\f(CW\*(C`ev_stat\*(C'\fR) and even limited support for fork events (\f(CW\*(C`ev_fork\*(C'\fR). .PP It also is quite fast (see this benchmark comparing it to libevent for example). .Sh "\s-1CONVENTIONS\s0" .IX Subsection "CONVENTIONS" Libev is very configurable. In this manual the default (and most common) configuration will be described, which supports multiple event loops. For more info about various configuration options please have a look at \&\fB\s-1EMBED\s0\fR section in this manual. If libev was configured without support for multiple event loops, then all functions taking an initial argument of name \f(CW\*(C`loop\*(C'\fR (which is always of type \f(CW\*(C`struct ev_loop *\*(C'\fR) will not have this argument. .Sh "\s-1TIME\s0 \s-1REPRESENTATION\s0" .IX Subsection "TIME REPRESENTATION" Libev represents time as a single floating point number, representing the (fractional) number of seconds since the (\s-1POSIX\s0) epoch (somewhere near the beginning of 1970, details are complicated, don't ask). This type is called \f(CW\*(C`ev_tstamp\*(C'\fR, which is what you should use too. It usually aliases to the \f(CW\*(C`double\*(C'\fR type in C, and when you need to do any calculations on it, you should treat it as some floatingpoint value. Unlike the name component \f(CW\*(C`stamp\*(C'\fR might indicate, it is also used for time differences throughout libev. .SH "GLOBAL FUNCTIONS" .IX Header "GLOBAL FUNCTIONS" These functions can be called anytime, even before initialising the library in any way. .IP "ev_tstamp ev_time ()" 4 .IX Item "ev_tstamp ev_time ()" Returns the current time as libev would use it. Please note that the \&\f(CW\*(C`ev_now\*(C'\fR function is usually faster and also often returns the timestamp you actually want to know. .IP "ev_sleep (ev_tstamp interval)" 4 .IX Item "ev_sleep (ev_tstamp interval)" Sleep for the given interval: The current thread will be blocked until either it is interrupted or the given time interval has passed. Basically this is a subsecond-resolution \f(CW\*(C`sleep ()\*(C'\fR. .IP "int ev_version_major ()" 4 .IX Item "int ev_version_major ()" .PD 0 .IP "int ev_version_minor ()" 4 .IX Item "int ev_version_minor ()" .PD You can find out the major and minor \s-1ABI\s0 version numbers of the library you linked against by calling the functions \f(CW\*(C`ev_version_major\*(C'\fR and \&\f(CW\*(C`ev_version_minor\*(C'\fR. If you want, you can compare against the global symbols \f(CW\*(C`EV_VERSION_MAJOR\*(C'\fR and \f(CW\*(C`EV_VERSION_MINOR\*(C'\fR, which specify the version of the library your program was compiled against. .Sp These version numbers refer to the \s-1ABI\s0 version of the library, not the release version. .Sp Usually, it's a good idea to terminate if the major versions mismatch, as this indicates an incompatible change. Minor versions are usually compatible to older versions, so a larger minor version alone is usually not a problem. .Sp Example: Make sure we haven't accidentally been linked against the wrong version. .Sp .Vb 3 \& assert (("libev version mismatch", \& ev_version_major () == EV_VERSION_MAJOR \& && ev_version_minor () >= EV_VERSION_MINOR)); .Ve .IP "unsigned int ev_supported_backends ()" 4 .IX Item "unsigned int ev_supported_backends ()" Return the set of all backends (i.e. their corresponding \f(CW\*(C`EV_BACKEND_*\*(C'\fR value) compiled into this binary of libev (independent of their availability on the system you are running on). See \f(CW\*(C`ev_default_loop\*(C'\fR for a description of the set values. .Sp Example: make sure we have the epoll method, because yeah this is cool and a must have and can we have a torrent of it please!!!11 .Sp .Vb 2 \& assert (("sorry, no epoll, no sex", \& ev_supported_backends () & EVBACKEND_EPOLL)); .Ve .IP "unsigned int ev_recommended_backends ()" 4 .IX Item "unsigned int ev_recommended_backends ()" Return the set of all backends compiled into this binary of libev and also recommended for this platform. This set is often smaller than the one returned by \f(CW\*(C`ev_supported_backends\*(C'\fR, as for example kqueue is broken on most BSDs and will not be autodetected unless you explicitly request it (assuming you know what you are doing). This is the set of backends that libev will probe for if you specify no backends explicitly. .IP "unsigned int ev_embeddable_backends ()" 4 .IX Item "unsigned int ev_embeddable_backends ()" Returns the set of backends that are embeddable in other event loops. This is the theoretical, all-platform, value. To find which backends might be supported on the current system, you would need to look at \&\f(CW\*(C`ev_embeddable_backends () & ev_supported_backends ()\*(C'\fR, likewise for recommended ones. .Sp See the description of \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .IP "ev_set_allocator (void *(*cb)(void *ptr, long size))" 4 .IX Item "ev_set_allocator (void *(*cb)(void *ptr, long size))" Sets the allocation function to use (the prototype is similar \- the semantics are identical to the \f(CW\*(C`realloc\*(C'\fR C89/SuS/POSIX function). It is used to allocate and free memory (no surprises here). If it returns zero when memory needs to be allocated (\f(CW\*(C`size != 0\*(C'\fR), the library might abort or take some potentially destructive action. .Sp Since some systems (at least OpenBSD and Darwin) fail to implement correct \f(CW\*(C`realloc\*(C'\fR semantics, libev will use a wrapper around the system \&\f(CW\*(C`realloc\*(C'\fR and \f(CW\*(C`free\*(C'\fR functions by default. .Sp You could override this function in high-availability programs to, say, free some memory if it cannot allocate memory, to use a special allocator, or even to sleep a while and retry until some memory is available. .Sp Example: Replace the libev allocator with one that waits a bit and then retries (example requires a standards-compliant \f(CW\*(C`realloc\*(C'\fR). .Sp .Vb 6 \& static void * \& persistent_realloc (void *ptr, size_t size) \& { \& for (;;) \& { \& void *newptr = realloc (ptr, size); \& \& if (newptr) \& return newptr; \& \& sleep (60); \& } \& } \& \& ... \& ev_set_allocator (persistent_realloc); .Ve .IP "ev_set_syserr_cb (void (*cb)(const char *msg));" 4 .IX Item "ev_set_syserr_cb (void (*cb)(const char *msg));" Set the callback function to call on a retryable syscall error (such as failed select, poll, epoll_wait). The message is a printable string indicating the system call or subsystem causing the problem. If this callback is set, then libev will expect it to remedy the sitution, no matter what, when it returns. That is, libev will generally retry the requested operation, or, if the condition doesn't go away, do bad stuff (such as abort). .Sp Example: This is basically the same thing that libev does internally, too. .Sp .Vb 6 \& static void \& fatal_error (const char *msg) \& { \& perror (msg); \& abort (); \& } \& \& ... \& ev_set_syserr_cb (fatal_error); .Ve .SH "FUNCTIONS CONTROLLING THE EVENT LOOP" .IX Header "FUNCTIONS CONTROLLING THE EVENT LOOP" An event loop is described by a \f(CW\*(C`struct ev_loop *\*(C'\fR. The library knows two types of such loops, the \fIdefault\fR loop, which supports signals and child events, and dynamically created loops which do not. .IP "struct ev_loop *ev_default_loop (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_default_loop (unsigned int flags)" This will initialise the default event loop if it hasn't been initialised yet and return it. If the default loop could not be initialised, returns false. If it already was initialised it simply returns it (and ignores the flags. If that is troubling you, check \f(CW\*(C`ev_backend ()\*(C'\fR afterwards). .Sp If you don't know what event loop to use, use the one returned from this function. .Sp Note that this function is \fInot\fR thread-safe, so if you want to use it from multiple threads, you have to lock (note also that this is unlikely, as loops cannot bes hared easily between threads anyway). .Sp The default loop is the only loop that can handle \f(CW\*(C`ev_signal\*(C'\fR and \&\f(CW\*(C`ev_child\*(C'\fR watchers, and to do this, it always registers a handler for \f(CW\*(C`SIGCHLD\*(C'\fR. If this is a problem for your app you can either create a dynamic loop with \f(CW\*(C`ev_loop_new\*(C'\fR that doesn't do that, or you can simply overwrite the \f(CW\*(C`SIGCHLD\*(C'\fR signal handler \fIafter\fR calling \&\f(CW\*(C`ev_default_init\*(C'\fR. .Sp The flags argument can be used to specify special behaviour or specific backends to use, and is usually specified as \f(CW0\fR (or \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). .Sp The following flags are supported: .RS 4 .ie n .IP """EVFLAG_AUTO""" 4 .el .IP "\f(CWEVFLAG_AUTO\fR" 4 .IX Item "EVFLAG_AUTO" The default flags value. Use this if you have no clue (it's the right thing, believe me). .ie n .IP """EVFLAG_NOENV""" 4 .el .IP "\f(CWEVFLAG_NOENV\fR" 4 .IX Item "EVFLAG_NOENV" If this flag bit is ored into the flag value (or the program runs setuid or setgid) then libev will \fInot\fR look at the environment variable \&\f(CW\*(C`LIBEV_FLAGS\*(C'\fR. Otherwise (the default), this environment variable will override the flags completely if it is found in the environment. This is useful to try out specific backends to test their performance, or to work around bugs. .ie n .IP """EVFLAG_FORKCHECK""" 4 .el .IP "\f(CWEVFLAG_FORKCHECK\fR" 4 .IX Item "EVFLAG_FORKCHECK" Instead of calling \f(CW\*(C`ev_default_fork\*(C'\fR or \f(CW\*(C`ev_loop_fork\*(C'\fR manually after a fork, you can also make libev check for a fork in each iteration by enabling this flag. .Sp This works by calling \f(CW\*(C`getpid ()\*(C'\fR on every iteration of the loop, and thus this might slow down your event loop if you do a lot of loop iterations and little real work, but is usually not noticeable (on my GNU/Linux system for example, \f(CW\*(C`getpid\*(C'\fR is actually a simple 5\-insn sequence without a syscall and thus \fIvery\fR fast, but my GNU/Linux system also has \&\f(CW\*(C`pthread_atfork\*(C'\fR which is even faster). .Sp The big advantage of this flag is that you can forget about fork (and forget about forgetting to tell libev about forking) when you use this flag. .Sp This flag setting cannot be overriden or specified in the \f(CW\*(C`LIBEV_FLAGS\*(C'\fR environment variable. .ie n .IP """EVBACKEND_SELECT"" (value 1, portable select backend)" 4 .el .IP "\f(CWEVBACKEND_SELECT\fR (value 1, portable select backend)" 4 .IX Item "EVBACKEND_SELECT (value 1, portable select backend)" This is your standard \fIselect\fR\|(2) backend. Not \fIcompletely\fR standard, as libev tries to roll its own fd_set with no limits on the number of fds, but if that fails, expect a fairly low limit on the number of fds when using this backend. It doesn't scale too well (O(highest_fd)), but its usually the fastest backend for a low number of (low-numbered :) fds. .Sp To get good performance out of this backend you need a high amount of parallelity (most of the file descriptors should be busy). If you are writing a server, you should \f(CW\*(C`accept ()\*(C'\fR in a loop to accept as many connections as possible during one iteration. You might also want to have a look at \f(CW\*(C`ev_set_io_collect_interval ()\*(C'\fR to increase the amount of readyness notifications you get per iteration. .ie n .IP """EVBACKEND_POLL"" (value 2, poll backend, available everywhere except on windows)" 4 .el .IP "\f(CWEVBACKEND_POLL\fR (value 2, poll backend, available everywhere except on windows)" 4 .IX Item "EVBACKEND_POLL (value 2, poll backend, available everywhere except on windows)" And this is your standard \fIpoll\fR\|(2) backend. It's more complicated than select, but handles sparse fds better and has no artificial limit on the number of fds you can use (except it will slow down considerably with a lot of inactive fds). It scales similarly to select, i.e. O(total_fds). See the entry for \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR, above, for performance tips. .ie n .IP """EVBACKEND_EPOLL"" (value 4, Linux)" 4 .el .IP "\f(CWEVBACKEND_EPOLL\fR (value 4, Linux)" 4 .IX Item "EVBACKEND_EPOLL (value 4, Linux)" For few fds, this backend is a bit little slower than poll and select, but it scales phenomenally better. While poll and select usually scale like O(total_fds) where n is the total number of fds (or the highest fd), epoll scales either O(1) or O(active_fds). The epoll design has a number of shortcomings, such as silently dropping events in some hard-to-detect cases and requiring a syscall per fd change, no fork support and bad support for dup. .Sp While stopping, setting and starting an I/O watcher in the same iteration will result in some caching, there is still a syscall per such incident (because the fd could point to a different file description now), so its best to avoid that. Also, \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors might not work very well if you register events for both fds. .Sp Please note that epoll sometimes generates spurious notifications, so you need to use non-blocking I/O or other means to avoid blocking when no data (or space) is available. .Sp Best performance from this backend is achieved by not unregistering all watchers for a file descriptor until it has been closed, if possible, i.e. keep at least one watcher active per fd at all times. .Sp While nominally embeddeble in other event loops, this feature is broken in all kernel versions tested so far. .ie n .IP """EVBACKEND_KQUEUE"" (value 8, most \s-1BSD\s0 clones)" 4 .el .IP "\f(CWEVBACKEND_KQUEUE\fR (value 8, most \s-1BSD\s0 clones)" 4 .IX Item "EVBACKEND_KQUEUE (value 8, most BSD clones)" Kqueue deserves special mention, as at the time of this writing, it was broken on all BSDs except NetBSD (usually it doesn't work reliably with anything but sockets and pipes, except on Darwin, where of course it's completely useless). For this reason it's not being \*(L"autodetected\*(R" unless you explicitly specify it explicitly in the flags (i.e. using \&\f(CW\*(C`EVBACKEND_KQUEUE\*(C'\fR) or libev was compiled on a known-to-be-good (\-enough) system like NetBSD. .Sp You still can embed kqueue into a normal poll or select backend and use it only for sockets (after having made sure that sockets work with kqueue on the target platform). See \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .Sp It scales in the same way as the epoll backend, but the interface to the kernel is more efficient (which says nothing about its actual speed, of course). While stopping, setting and starting an I/O watcher does never cause an extra syscall as with \f(CW\*(C`EVBACKEND_EPOLL\*(C'\fR, it still adds up to two event changes per incident, support for \f(CW\*(C`fork ()\*(C'\fR is very bad and it drops fds silently in similarly hard-to-detect cases. .Sp This backend usually performs well under most conditions. .Sp While nominally embeddable in other event loops, this doesn't work everywhere, so you might need to test for this. And since it is broken almost everywhere, you should only use it when you have a lot of sockets (for which it usually works), by embedding it into another event loop (e.g. \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR) and using it only for sockets. .ie n .IP """EVBACKEND_DEVPOLL"" (value 16, Solaris 8)" 4 .el .IP "\f(CWEVBACKEND_DEVPOLL\fR (value 16, Solaris 8)" 4 .IX Item "EVBACKEND_DEVPOLL (value 16, Solaris 8)" This is not implemented yet (and might never be, unless you send me an implementation). According to reports, \f(CW\*(C`/dev/poll\*(C'\fR only supports sockets and is not embeddable, which would limit the usefulness of this backend immensely. .ie n .IP """EVBACKEND_PORT"" (value 32, Solaris 10)" 4 .el .IP "\f(CWEVBACKEND_PORT\fR (value 32, Solaris 10)" 4 .IX Item "EVBACKEND_PORT (value 32, Solaris 10)" This uses the Solaris 10 event port mechanism. As with everything on Solaris, it's really slow, but it still scales very well (O(active_fds)). .Sp Please note that solaris event ports can deliver a lot of spurious notifications, so you need to use non-blocking I/O or other means to avoid blocking when no data (or space) is available. .Sp While this backend scales well, it requires one system call per active file descriptor per loop iteration. For small and medium numbers of file descriptors a \*(L"slow\*(R" \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR backend might perform better. .Sp On the positive side, ignoring the spurious readyness notifications, this backend actually performed to specification in all tests and is fully embeddable, which is a rare feat among the OS-specific backends. .ie n .IP """EVBACKEND_ALL""" 4 .el .IP "\f(CWEVBACKEND_ALL\fR" 4 .IX Item "EVBACKEND_ALL" Try all backends (even potentially broken ones that wouldn't be tried with \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). Since this is a mask, you can do stuff such as \&\f(CW\*(C`EVBACKEND_ALL & ~EVBACKEND_KQUEUE\*(C'\fR. .Sp It is definitely not recommended to use this flag. .RE .RS 4 .Sp If one or more of these are ored into the flags value, then only these backends will be tried (in the reverse order as listed here). If none are specified, all backends in \f(CW\*(C`ev_recommended_backends ()\*(C'\fR will be tried. .Sp The most typical usage is like this: .Sp .Vb 2 \& if (!ev_default_loop (0)) \& fatal ("could not initialise libev, bad $LIBEV_FLAGS in environment?"); .Ve .Sp Restrict libev to the select and poll backends, and do not allow environment settings to be taken into account: .Sp .Vb 1 \& ev_default_loop (EVBACKEND_POLL | EVBACKEND_SELECT | EVFLAG_NOENV); .Ve .Sp Use whatever libev has to offer, but make sure that kqueue is used if available (warning, breaks stuff, best use only with your own private event loop and only if you know the \s-1OS\s0 supports your types of fds): .Sp .Vb 1 \& ev_default_loop (ev_recommended_backends () | EVBACKEND_KQUEUE); .Ve .RE .IP "struct ev_loop *ev_loop_new (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_loop_new (unsigned int flags)" Similar to \f(CW\*(C`ev_default_loop\*(C'\fR, but always creates a new event loop that is always distinct from the default loop. Unlike the default loop, it cannot handle signal and child watchers, and attempts to do so will be greeted by undefined behaviour (or a failed assertion if assertions are enabled). .Sp Note that this function \fIis\fR thread-safe, and the recommended way to use libev with threads is indeed to create one loop per thread, and using the default loop in the \*(L"main\*(R" or \*(L"initial\*(R" thread. .Sp Example: Try to create a event loop that uses epoll and nothing else. .Sp .Vb 3 \& struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); \& if (!epoller) \& fatal ("no epoll found here, maybe it hides under your chair"); .Ve .IP "ev_default_destroy ()" 4 .IX Item "ev_default_destroy ()" Destroys the default loop again (frees all memory and kernel state etc.). None of the active event watchers will be stopped in the normal sense, so e.g. \f(CW\*(C`ev_is_active\*(C'\fR might still return true. It is your responsibility to either stop all watchers cleanly yoursef \fIbefore\fR calling this function, or cope with the fact afterwards (which is usually the easiest thing, you can just ignore the watchers and/or \f(CW\*(C`free ()\*(C'\fR them for example). .Sp Note that certain global state, such as signal state, will not be freed by this function, and related watchers (such as signal and child watchers) would need to be stopped manually. .Sp In general it is not advisable to call this function except in the rare occasion where you really need to free e.g. the signal handling pipe fds. If you need dynamically allocated loops it is better to use \&\f(CW\*(C`ev_loop_new\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR). .IP "ev_loop_destroy (loop)" 4 .IX Item "ev_loop_destroy (loop)" Like \f(CW\*(C`ev_default_destroy\*(C'\fR, but destroys an event loop created by an earlier call to \f(CW\*(C`ev_loop_new\*(C'\fR. .IP "ev_default_fork ()" 4 .IX Item "ev_default_fork ()" This function sets a flag that causes subsequent \f(CW\*(C`ev_loop\*(C'\fR iterations to reinitialise the kernel state for backends that have one. Despite the name, you can call it anytime, but it makes most sense after forking, in the child process (or both child and parent, but that again makes little sense). You \fImust\fR call it in the child before using any of the libev functions, and it will only take effect at the next \f(CW\*(C`ev_loop\*(C'\fR iteration. .Sp On the other hand, you only need to call this function in the child process if and only if you want to use the event library in the child. If you just fork+exec, you don't have to call it at all. .Sp The function itself is quite fast and it's usually not a problem to call it just in case after a fork. To make this easy, the function will fit in quite nicely into a call to \f(CW\*(C`pthread_atfork\*(C'\fR: .Sp .Vb 1 \& pthread_atfork (0, 0, ev_default_fork); .Ve .IP "ev_loop_fork (loop)" 4 .IX Item "ev_loop_fork (loop)" Like \f(CW\*(C`ev_default_fork\*(C'\fR, but acts on an event loop created by \&\f(CW\*(C`ev_loop_new\*(C'\fR. Yes, you have to call this on every allocated event loop after fork, and how you do this is entirely your own problem. .IP "int ev_is_default_loop (loop)" 4 .IX Item "int ev_is_default_loop (loop)" Returns true when the given loop actually is the default loop, false otherwise. .IP "unsigned int ev_loop_count (loop)" 4 .IX Item "unsigned int ev_loop_count (loop)" Returns the count of loop iterations for the loop, which is identical to the number of times libev did poll for new events. It starts at \f(CW0\fR and happily wraps around with enough iterations. .Sp This value can sometimes be useful as a generation counter of sorts (it \&\*(L"ticks\*(R" the number of loop iterations), as it roughly corresponds with \&\f(CW\*(C`ev_prepare\*(C'\fR and \f(CW\*(C`ev_check\*(C'\fR calls. .IP "unsigned int ev_backend (loop)" 4 .IX Item "unsigned int ev_backend (loop)" Returns one of the \f(CW\*(C`EVBACKEND_*\*(C'\fR flags indicating the event backend in use. .IP "ev_tstamp ev_now (loop)" 4 .IX Item "ev_tstamp ev_now (loop)" Returns the current \*(L"event loop time\*(R", which is the time the event loop received events and started processing them. This timestamp does not change as long as callbacks are being processed, and this is also the base time used for relative timers. You can treat it as the timestamp of the event occurring (or more correctly, libev finding out about it). .IP "ev_loop (loop, int flags)" 4 .IX Item "ev_loop (loop, int flags)" Finally, this is it, the event handler. This function usually is called after you initialised all your watchers and you want to start handling events. .Sp If the flags argument is specified as \f(CW0\fR, it will not return until either no event watchers are active anymore or \f(CW\*(C`ev_unloop\*(C'\fR was called. .Sp Please note that an explicit \f(CW\*(C`ev_unloop\*(C'\fR is usually better than relying on all watchers to be stopped when deciding when a program has finished (especially in interactive programs), but having a program that automatically loops as long as it has to and no longer by virtue of relying on its watchers stopping correctly is a thing of beauty. .Sp A flags value of \f(CW\*(C`EVLOOP_NONBLOCK\*(C'\fR will look for new events, will handle those events and any outstanding ones, but will not block your process in case there are no events and will return after one iteration of the loop. .Sp A flags value of \f(CW\*(C`EVLOOP_ONESHOT\*(C'\fR will look for new events (waiting if neccessary) and will handle those and any outstanding ones. It will block your process until at least one new event arrives, and will return after one iteration of the loop. This is useful if you are waiting for some external event in conjunction with something not expressible using other libev watchers. However, a pair of \f(CW\*(C`ev_prepare\*(C'\fR/\f(CW\*(C`ev_check\*(C'\fR watchers is usually a better approach for this kind of thing. .Sp Here are the gory details of what \f(CW\*(C`ev_loop\*(C'\fR does: .Sp .Vb 10 \& \- Before the first iteration, call any pending watchers. \& * If EVFLAG_FORKCHECK was used, check for a fork. \& \- If a fork was detected, queue and call all fork watchers. \& \- Queue and call all prepare watchers. \& \- If we have been forked, recreate the kernel state. \& \- Update the kernel state with all outstanding changes. \& \- Update the "event loop time". \& \- Calculate for how long to sleep or block, if at all \& (active idle watchers, EVLOOP_NONBLOCK or not having \& any active watchers at all will result in not sleeping). \& \- Sleep if the I/O and timer collect interval say so. \& \- Block the process, waiting for any events. \& \- Queue all outstanding I/O (fd) events. \& \- Update the "event loop time" and do time jump handling. \& \- Queue all outstanding timers. \& \- Queue all outstanding periodics. \& \- If no events are pending now, queue all idle watchers. \& \- Queue all check watchers. \& \- Call all queued watchers in reverse order (i.e. check watchers first). \& Signals and child watchers are implemented as I/O watchers, and will \& be handled here by queueing them when their watcher gets executed. \& \- If ev_unloop has been called, or EVLOOP_ONESHOT or EVLOOP_NONBLOCK \& were used, or there are no active watchers, return, otherwise \& continue with step *. .Ve .Sp Example: Queue some jobs and then loop until no events are outstanding anymore. .Sp .Vb 4 \& ... queue jobs here, make sure they register event watchers as long \& ... as they still have work to do (even an idle watcher will do..) \& ev_loop (my_loop, 0); \& ... jobs done. yeah! .Ve .IP "ev_unloop (loop, how)" 4 .IX Item "ev_unloop (loop, how)" Can be used to make a call to \f(CW\*(C`ev_loop\*(C'\fR return early (but only after it has processed all outstanding events). The \f(CW\*(C`how\*(C'\fR argument must be either \&\f(CW\*(C`EVUNLOOP_ONE\*(C'\fR, which will make the innermost \f(CW\*(C`ev_loop\*(C'\fR call return, or \&\f(CW\*(C`EVUNLOOP_ALL\*(C'\fR, which will make all nested \f(CW\*(C`ev_loop\*(C'\fR calls return. .Sp This \*(L"unloop state\*(R" will be cleared when entering \f(CW\*(C`ev_loop\*(C'\fR again. .IP "ev_ref (loop)" 4 .IX Item "ev_ref (loop)" .PD 0 .IP "ev_unref (loop)" 4 .IX Item "ev_unref (loop)" .PD Ref/unref can be used to add or remove a reference count on the event loop: Every watcher keeps one reference, and as long as the reference count is nonzero, \f(CW\*(C`ev_loop\*(C'\fR will not return on its own. If you have a watcher you never unregister that should not keep \f(CW\*(C`ev_loop\*(C'\fR from returning, \fIev_unref()\fR after starting, and \fIev_ref()\fR before stopping it. For example, libev itself uses this for its internal signal pipe: It is not visible to the libev user and should not keep \f(CW\*(C`ev_loop\*(C'\fR from exiting if no event watchers registered by it are active. It is also an excellent way to do this for generic recurring timers or from within third-party libraries. Just remember to \fIunref after start\fR and \fIref before stop\fR (but only if the watcher wasn't active before, or was active before, respectively). .Sp Example: Create a signal watcher, but keep it from keeping \f(CW\*(C`ev_loop\*(C'\fR running when nothing else is active. .Sp .Vb 4 \& struct ev_signal exitsig; \& ev_signal_init (&exitsig, sig_cb, SIGINT); \& ev_signal_start (loop, &exitsig); \& evf_unref (loop); .Ve .Sp Example: For some weird reason, unregister the above signal handler again. .Sp .Vb 2 \& ev_ref (loop); \& ev_signal_stop (loop, &exitsig); .Ve .IP "ev_set_io_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_io_collect_interval (loop, ev_tstamp interval)" .PD 0 .IP "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" .PD These advanced functions influence the time that libev will spend waiting for events. Both are by default \f(CW0\fR, meaning that libev will try to invoke timer/periodic callbacks and I/O callbacks with minimum latency. .Sp Setting these to a higher value (the \f(CW\*(C`interval\*(C'\fR \fImust\fR be >= \f(CW0\fR) allows libev to delay invocation of I/O and timer/periodic callbacks to increase efficiency of loop iterations. .Sp The background is that sometimes your program runs just fast enough to handle one (or very few) event(s) per loop iteration. While this makes the program responsive, it also wastes a lot of \s-1CPU\s0 time to poll for new events, especially with backends like \f(CW\*(C`select ()\*(C'\fR which have a high overhead for the actual polling but can deliver many events at once. .Sp By setting a higher \fIio collect interval\fR you allow libev to spend more time collecting I/O events, so you can handle more events per iteration, at the cost of increasing latency. Timeouts (both \f(CW\*(C`ev_periodic\*(C'\fR and \&\f(CW\*(C`ev_timer\*(C'\fR) will be not affected. Setting this to a non-null value will introduce an additional \f(CW\*(C`ev_sleep ()\*(C'\fR call into most loop iterations. .Sp Likewise, by setting a higher \fItimeout collect interval\fR you allow libev to spend more time collecting timeouts, at the expense of increased latency (the watcher callback will be called later). \f(CW\*(C`ev_io\*(C'\fR watchers will not be affected. Setting this to a non-null value will not introduce any overhead in libev. .Sp Many (busy) programs can usually benefit by setting the io collect interval to a value near \f(CW0.1\fR or so, which is often enough for interactive servers (of course not for games), likewise for timeouts. It usually doesn't make much sense to set it to a lower value than \f(CW0.01\fR, as this approsaches the timing granularity of most systems. .SH "ANATOMY OF A WATCHER" .IX Header "ANATOMY OF A WATCHER" A watcher is a structure that you create and register to record your interest in some event. For instance, if you want to wait for \s-1STDIN\s0 to become readable, you would create an \f(CW\*(C`ev_io\*(C'\fR watcher for that: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, struct ev_io *w, int revents) \& { \& ev_io_stop (w); \& ev_unloop (loop, EVUNLOOP_ALL); \& } \& \& struct ev_loop *loop = ev_default_loop (0); \& struct ev_io stdin_watcher; \& ev_init (&stdin_watcher, my_cb); \& ev_io_set (&stdin_watcher, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& ev_loop (loop, 0); .Ve .PP As you can see, you are responsible for allocating the memory for your watcher structures (and it is usually a bad idea to do this on the stack, although this can sometimes be quite valid). .PP Each watcher structure must be initialised by a call to \f(CW\*(C`ev_init (watcher *, callback)\*(C'\fR, which expects a callback to be provided. This callback gets invoked each time the event occurs (or, in the case of io watchers, each time the event loop detects that the file descriptor given is readable and/or writable). .PP Each watcher type has its own \f(CW\*(C`ev__set (watcher *, ...)\*(C'\fR macro with arguments specific to this watcher type. There is also a macro to combine initialisation and setting in one call: \f(CW\*(C`ev__init (watcher *, callback, ...)\*(C'\fR. .PP To make the watcher actually watch out for events, you have to start it with a watcher-specific start function (\f(CW\*(C`ev__start (loop, watcher *)\*(C'\fR), and you can stop watching for events at any time by calling the corresponding stop function (\f(CW\*(C`ev__stop (loop, watcher *)\*(C'\fR. .PP As long as your watcher is active (has been started but not stopped) you must not touch the values stored in it. Most specifically you must never reinitialise it or call its \f(CW\*(C`set\*(C'\fR macro. .PP Each and every callback receives the event loop pointer as first, the registered watcher structure as second, and a bitset of received events as third argument. .PP The received events usually include a single bit per event type received (you can receive multiple events at the same time). The possible bit masks are: .ie n .IP """EV_READ""" 4 .el .IP "\f(CWEV_READ\fR" 4 .IX Item "EV_READ" .PD 0 .ie n .IP """EV_WRITE""" 4 .el .IP "\f(CWEV_WRITE\fR" 4 .IX Item "EV_WRITE" .PD The file descriptor in the \f(CW\*(C`ev_io\*(C'\fR watcher has become readable and/or writable. .ie n .IP """EV_TIMEOUT""" 4 .el .IP "\f(CWEV_TIMEOUT\fR" 4 .IX Item "EV_TIMEOUT" The \f(CW\*(C`ev_timer\*(C'\fR watcher has timed out. .ie n .IP """EV_PERIODIC""" 4 .el .IP "\f(CWEV_PERIODIC\fR" 4 .IX Item "EV_PERIODIC" The \f(CW\*(C`ev_periodic\*(C'\fR watcher has timed out. .ie n .IP """EV_SIGNAL""" 4 .el .IP "\f(CWEV_SIGNAL\fR" 4 .IX Item "EV_SIGNAL" The signal specified in the \f(CW\*(C`ev_signal\*(C'\fR watcher has been received by a thread. .ie n .IP """EV_CHILD""" 4 .el .IP "\f(CWEV_CHILD\fR" 4 .IX Item "EV_CHILD" The pid specified in the \f(CW\*(C`ev_child\*(C'\fR watcher has received a status change. .ie n .IP """EV_STAT""" 4 .el .IP "\f(CWEV_STAT\fR" 4 .IX Item "EV_STAT" The path specified in the \f(CW\*(C`ev_stat\*(C'\fR watcher changed its attributes somehow. .ie n .IP """EV_IDLE""" 4 .el .IP "\f(CWEV_IDLE\fR" 4 .IX Item "EV_IDLE" The \f(CW\*(C`ev_idle\*(C'\fR watcher has determined that you have nothing better to do. .ie n .IP """EV_PREPARE""" 4 .el .IP "\f(CWEV_PREPARE\fR" 4 .IX Item "EV_PREPARE" .PD 0 .ie n .IP """EV_CHECK""" 4 .el .IP "\f(CWEV_CHECK\fR" 4 .IX Item "EV_CHECK" .PD All \f(CW\*(C`ev_prepare\*(C'\fR watchers are invoked just \fIbefore\fR \f(CW\*(C`ev_loop\*(C'\fR starts to gather new events, and all \f(CW\*(C`ev_check\*(C'\fR watchers are invoked just after \&\f(CW\*(C`ev_loop\*(C'\fR has gathered them, but before it invokes any callbacks for any received events. Callbacks of both watcher types can start and stop as many watchers as they want, and all of them will be taken into account (for example, a \f(CW\*(C`ev_prepare\*(C'\fR watcher might start an idle watcher to keep \&\f(CW\*(C`ev_loop\*(C'\fR from blocking). .ie n .IP """EV_EMBED""" 4 .el .IP "\f(CWEV_EMBED\fR" 4 .IX Item "EV_EMBED" The embedded event loop specified in the \f(CW\*(C`ev_embed\*(C'\fR watcher needs attention. .ie n .IP """EV_FORK""" 4 .el .IP "\f(CWEV_FORK\fR" 4 .IX Item "EV_FORK" The event loop has been resumed in the child process after fork (see \&\f(CW\*(C`ev_fork\*(C'\fR). .ie n .IP """EV_ASYNC""" 4 .el .IP "\f(CWEV_ASYNC\fR" 4 .IX Item "EV_ASYNC" The given async watcher has been asynchronously notified (see \f(CW\*(C`ev_async\*(C'\fR). .ie n .IP """EV_ERROR""" 4 .el .IP "\f(CWEV_ERROR\fR" 4 .IX Item "EV_ERROR" An unspecified error has occured, the watcher has been stopped. This might happen because the watcher could not be properly started because libev ran out of memory, a file descriptor was found to be closed or any other problem. You best act on it by reporting the problem and somehow coping with the watcher being stopped. .Sp Libev will usually signal a few \*(L"dummy\*(R" events together with an error, for example it might indicate that a fd is readable or writable, and if your callbacks is well-written it can just attempt the operation and cope with the error from \fIread()\fR or \fIwrite()\fR. This will not work in multithreaded programs, though, so beware. .Sh "\s-1GENERIC\s0 \s-1WATCHER\s0 \s-1FUNCTIONS\s0" .IX Subsection "GENERIC WATCHER FUNCTIONS" In the following description, \f(CW\*(C`TYPE\*(C'\fR stands for the watcher type, e.g. \f(CW\*(C`timer\*(C'\fR for \f(CW\*(C`ev_timer\*(C'\fR watchers and \f(CW\*(C`io\*(C'\fR for \f(CW\*(C`ev_io\*(C'\fR watchers. .ie n .IP """ev_init"" (ev_TYPE *watcher, callback)" 4 .el .IP "\f(CWev_init\fR (ev_TYPE *watcher, callback)" 4 .IX Item "ev_init (ev_TYPE *watcher, callback)" This macro initialises the generic portion of a watcher. The contents of the watcher object can be arbitrary (so \f(CW\*(C`malloc\*(C'\fR will do). Only the generic parts of the watcher are initialised, you \fIneed\fR to call the type-specific \f(CW\*(C`ev_TYPE_set\*(C'\fR macro afterwards to initialise the type-specific parts. For each type there is also a \f(CW\*(C`ev_TYPE_init\*(C'\fR macro which rolls both calls into one. .Sp You can reinitialise a watcher at any time as long as it has been stopped (or never started) and there are no pending events outstanding. .Sp The callback is always of type \f(CW\*(C`void (*)(ev_loop *loop, ev_TYPE *watcher, int revents)\*(C'\fR. .ie n .IP """ev_TYPE_set"" (ev_TYPE *, [args])" 4 .el .IP "\f(CWev_TYPE_set\fR (ev_TYPE *, [args])" 4 .IX Item "ev_TYPE_set (ev_TYPE *, [args])" This macro initialises the type-specific parts of a watcher. You need to call \f(CW\*(C`ev_init\*(C'\fR at least once before you call this macro, but you can call \f(CW\*(C`ev_TYPE_set\*(C'\fR any number of times. You must not, however, call this macro on a watcher that is active (it can be pending, however, which is a difference to the \f(CW\*(C`ev_init\*(C'\fR macro). .Sp Although some watcher types do not have type-specific arguments (e.g. \f(CW\*(C`ev_prepare\*(C'\fR) you still need to call its \f(CW\*(C`set\*(C'\fR macro. .ie n .IP """ev_TYPE_init"" (ev_TYPE *watcher, callback, [args])" 4 .el .IP "\f(CWev_TYPE_init\fR (ev_TYPE *watcher, callback, [args])" 4 .IX Item "ev_TYPE_init (ev_TYPE *watcher, callback, [args])" This convinience macro rolls both \f(CW\*(C`ev_init\*(C'\fR and \f(CW\*(C`ev_TYPE_set\*(C'\fR macro calls into a single call. This is the most convinient method to initialise a watcher. The same limitations apply, of course. .ie n .IP """ev_TYPE_start"" (loop *, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_start\fR (loop *, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_start (loop *, ev_TYPE *watcher)" Starts (activates) the given watcher. Only active watchers will receive events. If the watcher is already active nothing will happen. .ie n .IP """ev_TYPE_stop"" (loop *, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_stop\fR (loop *, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_stop (loop *, ev_TYPE *watcher)" Stops the given watcher again (if active) and clears the pending status. It is possible that stopped watchers are pending (for example, non-repeating timers are being stopped when they become pending), but \&\f(CW\*(C`ev_TYPE_stop\*(C'\fR ensures that the watcher is neither active nor pending. If you want to free or reuse the memory used by the watcher it is therefore a good idea to always call its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. .IP "bool ev_is_active (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_active (ev_TYPE *watcher)" Returns a true value iff the watcher is active (i.e. it has been started and not yet been stopped). As long as a watcher is active you must not modify it. .IP "bool ev_is_pending (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_pending (ev_TYPE *watcher)" Returns a true value iff the watcher is pending, (i.e. it has outstanding events but its callback has not yet been invoked). As long as a watcher is pending (but not active) you must not call an init function on it (but \&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR it). .IP "callback ev_cb (ev_TYPE *watcher)" 4 .IX Item "callback ev_cb (ev_TYPE *watcher)" Returns the callback currently set on the watcher. .IP "ev_cb_set (ev_TYPE *watcher, callback)" 4 .IX Item "ev_cb_set (ev_TYPE *watcher, callback)" Change the callback. You can change the callback at virtually any time (modulo threads). .IP "ev_set_priority (ev_TYPE *watcher, priority)" 4 .IX Item "ev_set_priority (ev_TYPE *watcher, priority)" .PD 0 .IP "int ev_priority (ev_TYPE *watcher)" 4 .IX Item "int ev_priority (ev_TYPE *watcher)" .PD Set and query the priority of the watcher. The priority is a small integer between \f(CW\*(C`EV_MAXPRI\*(C'\fR (default: \f(CW2\fR) and \f(CW\*(C`EV_MINPRI\*(C'\fR (default: \f(CW\*(C`\-2\*(C'\fR). Pending watchers with higher priority will be invoked before watchers with lower priority, but priority will not keep watchers from being executed (except for \f(CW\*(C`ev_idle\*(C'\fR watchers). .Sp This means that priorities are \fIonly\fR used for ordering callback invocation after new events have been received. This is useful, for example, to reduce latency after idling, or more often, to bind two watchers on the same event and make sure one is called first. .Sp If you need to suppress invocation when higher priority events are pending you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. .Sp You \fImust not\fR change the priority of a watcher as long as it is active or pending. .Sp The default priority used by watchers when no priority has been set is always \f(CW0\fR, which is supposed to not be too high and not be too low :). .Sp Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is fine, as long as you do not mind that the priority value you query might or might not have been adjusted to be within valid range. .IP "ev_invoke (loop, ev_TYPE *watcher, int revents)" 4 .IX Item "ev_invoke (loop, ev_TYPE *watcher, int revents)" Invoke the \f(CW\*(C`watcher\*(C'\fR with the given \f(CW\*(C`loop\*(C'\fR and \f(CW\*(C`revents\*(C'\fR. Neither \&\f(CW\*(C`loop\*(C'\fR nor \f(CW\*(C`revents\*(C'\fR need to be valid as long as the watcher callback can deal with that fact. .IP "int ev_clear_pending (loop, ev_TYPE *watcher)" 4 .IX Item "int ev_clear_pending (loop, ev_TYPE *watcher)" If the watcher is pending, this function returns clears its pending status and returns its \f(CW\*(C`revents\*(C'\fR bitset (as if its callback was invoked). If the watcher isn't pending it does nothing and returns \f(CW0\fR. .Sh "\s-1ASSOCIATING\s0 \s-1CUSTOM\s0 \s-1DATA\s0 \s-1WITH\s0 A \s-1WATCHER\s0" .IX Subsection "ASSOCIATING CUSTOM DATA WITH A WATCHER" Each watcher has, by default, a member \f(CW\*(C`void *data\*(C'\fR that you can change and read at any time, libev will completely ignore it. This can be used to associate arbitrary data with your watcher. If you need more data and don't want to allocate memory and store a pointer to it in that data member, you can also \*(L"subclass\*(R" the watcher type and provide your own data: .PP .Vb 7 \& struct my_io \& { \& struct ev_io io; \& int otherfd; \& void *somedata; \& struct whatever *mostinteresting; \& } .Ve .PP And since your callback will be called with a pointer to the watcher, you can cast it back to your own type: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, struct ev_io *w_, int revents) \& { \& struct my_io *w = (struct my_io *)w_; \& ... \& } .Ve .PP More interesting and less C\-conformant ways of casting your callback type instead have been omitted. .PP Another common scenario is having some data structure with multiple watchers: .PP .Vb 6 \& struct my_biggy \& { \& int some_data; \& ev_timer t1; \& ev_timer t2; \& } .Ve .PP In this case getting the pointer to \f(CW\*(C`my_biggy\*(C'\fR is a bit more complicated, you need to use \f(CW\*(C`offsetof\*(C'\fR: .PP .Vb 1 \& #include \& \& static void \& t1_cb (EV_P_ struct ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy * \& (((char *)w) \- offsetof (struct my_biggy, t1)); \& } \& \& static void \& t2_cb (EV_P_ struct ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy * \& (((char *)w) \- offsetof (struct my_biggy, t2)); \& } .Ve .SH "WATCHER TYPES" .IX Header "WATCHER TYPES" This section describes each watcher in detail, but will not repeat information given in the last section. Any initialisation/set macros, functions and members specific to the watcher type are explained. .PP Members are additionally marked with either \fI[read\-only]\fR, meaning that, while the watcher is active, you can look at the member and expect some sensible content, but you must not modify it (you can modify it while the watcher is stopped to your hearts content), or \fI[read\-write]\fR, which means you can expect it to have some sensible content while the watcher is active, but you can also modify it. Modifying it may not do something sensible or take immediate effect (or do anything at all), but libev will not crash or malfunction in any way. .ie n .Sh """ev_io"" \- is this file descriptor readable or writable?" .el .Sh "\f(CWev_io\fP \- is this file descriptor readable or writable?" .IX Subsection "ev_io - is this file descriptor readable or writable?" I/O watchers check whether a file descriptor is readable or writable in each iteration of the event loop, or, more precisely, when reading would not block the process and writing would at least be able to write some data. This behaviour is called level-triggering because you keep receiving events as long as the condition persists. Remember you can stop the watcher if you don't want to act on the event and neither want to receive future events. .PP In general you can register as many read and/or write event watchers per fd as you want (as long as you don't confuse yourself). Setting all file descriptors to non-blocking mode is also usually a good idea (but not required if you know what you are doing). .PP If you must do this, then force the use of a known-to-be-good backend (at the time of this writing, this includes only \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR and \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR). .PP Another thing you have to watch out for is that it is quite easy to receive \*(L"spurious\*(R" readyness notifications, that is your callback might be called with \f(CW\*(C`EV_READ\*(C'\fR but a subsequent \f(CW\*(C`read\*(C'\fR(2) will actually block because there is no data. Not only are some backends known to create a lot of those (for example solaris ports), it is very easy to get into this situation even with a relatively standard program structure. Thus it is best to always use non-blocking I/O: An extra \f(CW\*(C`read\*(C'\fR(2) returning \&\f(CW\*(C`EAGAIN\*(C'\fR is far preferable to a program hanging until some data arrives. .PP If you cannot run the fd in non-blocking mode (for example you should not play around with an Xlib connection), then you have to seperately re-test whether a file descriptor is really ready with a known-to-be good interface such as poll (fortunately in our Xlib example, Xlib already does this on its own, so its quite safe to use). .PP \fIThe special problem of disappearing file descriptors\fR .IX Subsection "The special problem of disappearing file descriptors" .PP Some backends (e.g. kqueue, epoll) need to be told about closing a file descriptor (either by calling \f(CW\*(C`close\*(C'\fR explicitly or by any other means, such as \f(CW\*(C`dup\*(C'\fR). The reason is that you register interest in some file descriptor, but when it goes away, the operating system will silently drop this interest. If another file descriptor with the same number then is registered with libev, there is no efficient way to see that this is, in fact, a different file descriptor. .PP To avoid having to explicitly tell libev about such cases, libev follows the following policy: Each time \f(CW\*(C`ev_io_set\*(C'\fR is being called, libev will assume that this is potentially a new file descriptor, otherwise it is assumed that the file descriptor stays the same. That means that you \fIhave\fR to call \f(CW\*(C`ev_io_set\*(C'\fR (or \f(CW\*(C`ev_io_init\*(C'\fR) when you change the descriptor even if the file descriptor number itself did not change. .PP This is how one would do it normally anyway, the important point is that the libev application should not optimise around libev but should leave optimisations to libev. .PP \fIThe special problem of dup'ed file descriptors\fR .IX Subsection "The special problem of dup'ed file descriptors" .PP Some backends (e.g. epoll), cannot register events for file descriptors, but only events for the underlying file descriptions. That means when you have \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors or weirder constellations, and register events for them, only one file descriptor might actually receive events. .PP There is no workaround possible except not registering events for potentially \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors, or to resort to \&\f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of fork\fR .IX Subsection "The special problem of fork" .PP Some backends (epoll, kqueue) do not support \f(CW\*(C`fork ()\*(C'\fR at all or exhibit useless behaviour. Libev fully supports fork, but needs to be told about it in the child. .PP To support fork in your programs, you either have to call \&\f(CW\*(C`ev_default_fork ()\*(C'\fR or \f(CW\*(C`ev_loop_fork ()\*(C'\fR after a fork in the child, enable \f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR, or resort to \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of \s-1SIGPIPE\s0\fR .IX Subsection "The special problem of SIGPIPE" .PP While not really specific to libev, it is easy to forget about \s-1SIGPIPE:\s0 when reading from a pipe whose other end has been closed, your program gets send a \s-1SIGPIPE\s0, which, by default, aborts your program. For most programs this is sensible behaviour, for daemons, this is usually undesirable. .PP So when you encounter spurious, unexplained daemon exits, make sure you ignore \s-1SIGPIPE\s0 (and maybe make sure you log the exit status of your daemon somewhere, as that would have given you a big clue). .PP \fIWatcher-Specific Functions\fR .IX Subsection "Watcher-Specific Functions" .IP "ev_io_init (ev_io *, callback, int fd, int events)" 4 .IX Item "ev_io_init (ev_io *, callback, int fd, int events)" .PD 0 .IP "ev_io_set (ev_io *, int fd, int events)" 4 .IX Item "ev_io_set (ev_io *, int fd, int events)" .PD Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to rceeive events for and events is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR to receive the given events. .IP "int fd [read\-only]" 4 .IX Item "int fd [read-only]" The file descriptor being watched. .IP "int events [read\-only]" 4 .IX Item "int events [read-only]" The events being watched. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well readable, but only once. Since it is likely line-buffered, you could attempt to read a whole line in the callback. .PP .Vb 6 \& static void \& stdin_readable_cb (struct ev_loop *loop, struct ev_io *w, int revents) \& { \& ev_io_stop (loop, w); \& .. read from stdin here (or from w\->fd) and haqndle any I/O errors \& } \& \& ... \& struct ev_loop *loop = ev_default_init (0); \& struct ev_io stdin_readable; \& ev_io_init (&stdin_readable, stdin_readable_cb, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_readable); \& ev_loop (loop, 0); .Ve .ie n .Sh """ev_timer"" \- relative and optionally repeating timeouts" .el .Sh "\f(CWev_timer\fP \- relative and optionally repeating timeouts" .IX Subsection "ev_timer - relative and optionally repeating timeouts" Timer watchers are simple relative timers that generate an event after a given time, and optionally repeating in regular intervals after that. .PP The timers are based on real time, that is, if you register an event that times out after an hour and you reset your system clock to last years time, it will still time out after (roughly) and hour. \*(L"Roughly\*(R" because detecting time jumps is hard, and some inaccuracies are unavoidable (the monotonic clock option helps a lot here). .PP The relative timeouts are calculated relative to the \f(CW\*(C`ev_now ()\*(C'\fR time. This is usually the right thing as this timestamp refers to the time of the event triggering whatever timeout you are modifying/starting. If you suspect event processing to be delayed and you \fIneed\fR to base the timeout on the current time, use something like this to adjust for this: .PP .Vb 1 \& ev_timer_set (&timer, after + ev_now () \- ev_time (), 0.); .Ve .PP The callback is guarenteed to be invoked only when its timeout has passed, but if multiple timers become ready during the same loop iteration then order of execution is undefined. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" .PD 0 .IP "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" .PD Configure the timer to trigger after \f(CW\*(C`after\*(C'\fR seconds. If \f(CW\*(C`repeat\*(C'\fR is \&\f(CW0.\fR, then it will automatically be stopped. If it is positive, then the timer will automatically be configured to trigger again \f(CW\*(C`repeat\*(C'\fR seconds later, again, and again, until stopped manually. .Sp The timer itself will do a best-effort at avoiding drift, that is, if you configure a timer to trigger every 10 seconds, then it will trigger at exactly 10 second intervals. If, however, your program cannot keep up with the timer (because it takes longer than those 10 seconds to do stuff) the timer will not fire more than once per event loop iteration. .IP "ev_timer_again (loop, ev_timer *)" 4 .IX Item "ev_timer_again (loop, ev_timer *)" This will act as if the timer timed out and restart it again if it is repeating. The exact semantics are: .Sp If the timer is pending, its pending status is cleared. .Sp If the timer is started but nonrepeating, stop it (as if it timed out). .Sp If the timer is repeating, either start it if necessary (with the \&\f(CW\*(C`repeat\*(C'\fR value), or reset the running timer to the \f(CW\*(C`repeat\*(C'\fR value. .Sp This sounds a bit complicated, but here is a useful and typical example: Imagine you have a tcp connection and you want a so-called idle timeout, that is, you want to be called when there have been, say, 60 seconds of inactivity on the socket. The easiest way to do this is to configure an \f(CW\*(C`ev_timer\*(C'\fR with a \f(CW\*(C`repeat\*(C'\fR value of \f(CW60\fR and then call \&\f(CW\*(C`ev_timer_again\*(C'\fR each time you successfully read or write some data. If you go into an idle state where you do not expect data to travel on the socket, you can \f(CW\*(C`ev_timer_stop\*(C'\fR the timer, and \f(CW\*(C`ev_timer_again\*(C'\fR will automatically restart it if need be. .Sp That means you can ignore the \f(CW\*(C`after\*(C'\fR value and \f(CW\*(C`ev_timer_start\*(C'\fR altogether and only ever use the \f(CW\*(C`repeat\*(C'\fR value and \f(CW\*(C`ev_timer_again\*(C'\fR: .Sp .Vb 8 \& ev_timer_init (timer, callback, 0., 5.); \& ev_timer_again (loop, timer); \& ... \& timer\->again = 17.; \& ev_timer_again (loop, timer); \& ... \& timer\->again = 10.; \& ev_timer_again (loop, timer); .Ve .Sp This is more slightly efficient then stopping/starting the timer each time you want to modify its timeout value. .IP "ev_tstamp repeat [read\-write]" 4 .IX Item "ev_tstamp repeat [read-write]" The current \f(CW\*(C`repeat\*(C'\fR value. Will be used each time the watcher times out or \f(CW\*(C`ev_timer_again\*(C'\fR is called and determines the next timeout (if any), which is also when any modifications are taken into account. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Create a timer that fires after 60 seconds. .PP .Vb 5 \& static void \& one_minute_cb (struct ev_loop *loop, struct ev_timer *w, int revents) \& { \& .. one minute over, w is actually stopped right here \& } \& \& struct ev_timer mytimer; \& ev_timer_init (&mytimer, one_minute_cb, 60., 0.); \& ev_timer_start (loop, &mytimer); .Ve .PP Example: Create a timeout timer that times out after 10 seconds of inactivity. .PP .Vb 5 \& static void \& timeout_cb (struct ev_loop *loop, struct ev_timer *w, int revents) \& { \& .. ten seconds without any activity \& } \& \& struct ev_timer mytimer; \& ev_timer_init (&mytimer, timeout_cb, 0., 10.); /* note, only repeat used */ \& ev_timer_again (&mytimer); /* start timer */ \& ev_loop (loop, 0); \& \& // and in some piece of code that gets executed on any "activity": \& // reset the timeout to start ticking again at 10 seconds \& ev_timer_again (&mytimer); .Ve .ie n .Sh """ev_periodic"" \- to cron or not to cron?" .el .Sh "\f(CWev_periodic\fP \- to cron or not to cron?" .IX Subsection "ev_periodic - to cron or not to cron?" Periodic watchers are also timers of a kind, but they are very versatile (and unfortunately a bit complex). .PP Unlike \f(CW\*(C`ev_timer\*(C'\fR's, they are not based on real time (or relative time) but on wallclock time (absolute time). You can tell a periodic watcher to trigger \*(L"at\*(R" some specific point in time. For example, if you tell a periodic watcher to trigger in 10 seconds (by specifiying e.g. \f(CW\*(C`ev_now () + 10.\*(C'\fR) and then reset your system clock to the last year, then it will take a year to trigger the event (unlike an \f(CW\*(C`ev_timer\*(C'\fR, which would trigger roughly 10 seconds later). .PP They can also be used to implement vastly more complex timers, such as triggering an event on each midnight, local time or other, complicated, rules. .PP As with timers, the callback is guarenteed to be invoked only when the time (\f(CW\*(C`at\*(C'\fR) has been passed, but if multiple periodic timers become ready during the same loop iteration then order of execution is undefined. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_periodic_init (ev_periodic *, callback, ev_tstamp at, ev_tstamp interval, reschedule_cb)" 4 .IX Item "ev_periodic_init (ev_periodic *, callback, ev_tstamp at, ev_tstamp interval, reschedule_cb)" .PD 0 .IP "ev_periodic_set (ev_periodic *, ev_tstamp after, ev_tstamp repeat, reschedule_cb)" 4 .IX Item "ev_periodic_set (ev_periodic *, ev_tstamp after, ev_tstamp repeat, reschedule_cb)" .PD Lots of arguments, lets sort it out... There are basically three modes of operation, and we will explain them from simplest to complex: .RS 4 .IP "\(bu" 4 absolute timer (at = time, interval = reschedule_cb = 0) .Sp In this configuration the watcher triggers an event at the wallclock time \&\f(CW\*(C`at\*(C'\fR and doesn't repeat. It will not adjust when a time jump occurs, that is, if it is to be run at January 1st 2011 then it will run when the system time reaches or surpasses this time. .IP "\(bu" 4 repeating interval timer (at = offset, interval > 0, reschedule_cb = 0) .Sp In this mode the watcher will always be scheduled to time out at the next \&\f(CW\*(C`at + N * interval\*(C'\fR time (for some integer N, which can also be negative) and then repeat, regardless of any time jumps. .Sp This can be used to create timers that do not drift with respect to system time: .Sp .Vb 1 \& ev_periodic_set (&periodic, 0., 3600., 0); .Ve .Sp This doesn't mean there will always be 3600 seconds in between triggers, but only that the the callback will be called when the system time shows a full hour (\s-1UTC\s0), or more correctly, when the system time is evenly divisible by 3600. .Sp Another way to think about it (for the mathematically inclined) is that \&\f(CW\*(C`ev_periodic\*(C'\fR will try to run the callback in this mode at the next possible time where \f(CW\*(C`time = at (mod interval)\*(C'\fR, regardless of any time jumps. .Sp For numerical stability it is preferable that the \f(CW\*(C`at\*(C'\fR value is near \&\f(CW\*(C`ev_now ()\*(C'\fR (the current time), but there is no range requirement for this value. .IP "\(bu" 4 manual reschedule mode (at and interval ignored, reschedule_cb = callback) .Sp In this mode the values for \f(CW\*(C`interval\*(C'\fR and \f(CW\*(C`at\*(C'\fR are both being ignored. Instead, each time the periodic watcher gets scheduled, the reschedule callback will be called with the watcher as first, and the current time as second argument. .Sp \&\s-1NOTE:\s0 \fIThis callback \s-1MUST\s0 \s-1NOT\s0 stop or destroy any periodic watcher, ever, or make any event loop modifications\fR. If you need to stop it, return \f(CW\*(C`now + 1e30\*(C'\fR (or so, fudge fudge) and stop it afterwards (e.g. by starting an \f(CW\*(C`ev_prepare\*(C'\fR watcher, which is legal). .Sp Its prototype is \f(CW\*(C`ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now)\*(C'\fR, e.g.: .Sp .Vb 4 \& static ev_tstamp my_rescheduler (struct ev_periodic *w, ev_tstamp now) \& { \& return now + 60.; \& } .Ve .Sp It must return the next time to trigger, based on the passed time value (that is, the lowest time value larger than to the second argument). It will usually be called just before the callback will be triggered, but might be called at other times, too. .Sp \&\s-1NOTE:\s0 \fIThis callback must always return a time that is later than the passed \f(CI\*(C`now\*(C'\fI value\fR. Not even \f(CW\*(C`now\*(C'\fR itself will do, it \fImust\fR be larger. .Sp This can be used to create very complex timers, such as a timer that triggers on each midnight, local time. To do this, you would calculate the next midnight after \f(CW\*(C`now\*(C'\fR and return the timestamp value for this. How you do this is, again, up to you (but it is not trivial, which is the main reason I omitted it as an example). .RE .RS 4 .RE .IP "ev_periodic_again (loop, ev_periodic *)" 4 .IX Item "ev_periodic_again (loop, ev_periodic *)" Simply stops and restarts the periodic watcher again. This is only useful when you changed some parameters or the reschedule callback would return a different time than the last time it was called (e.g. in a crond like program when the crontabs have changed). .IP "ev_tstamp ev_periodic_at (ev_periodic *)" 4 .IX Item "ev_tstamp ev_periodic_at (ev_periodic *)" When active, returns the absolute time that the watcher is supposed to trigger next. .IP "ev_tstamp offset [read\-write]" 4 .IX Item "ev_tstamp offset [read-write]" When repeating, this contains the offset value, otherwise this is the absolute point in time (the \f(CW\*(C`at\*(C'\fR value passed to \f(CW\*(C`ev_periodic_set\*(C'\fR). .Sp Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp interval [read\-write]" 4 .IX Item "ev_tstamp interval [read-write]" The current interval value. Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) [read\-write]" 4 .IX Item "ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) [read-write]" The current reschedule callback, or \f(CW0\fR, if this functionality is switched off. Can be changed any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call a callback every hour, or, more precisely, whenever the system clock is divisible by 3600. The callback invocation times have potentially a lot of jittering, but good long-term stability. .PP .Vb 5 \& static void \& clock_cb (struct ev_loop *loop, struct ev_io *w, int revents) \& { \& ... its now a full hour (UTC, or TAI or whatever your clock follows) \& } \& \& struct ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, 0., 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .PP Example: The same as above, but use a reschedule callback to do it: .PP .Vb 1 \& #include \& \& static ev_tstamp \& my_scheduler_cb (struct ev_periodic *w, ev_tstamp now) \& { \& return fmod (now, 3600.) + 3600.; \& } \& \& ev_periodic_init (&hourly_tick, clock_cb, 0., 0., my_scheduler_cb); .Ve .PP Example: Call a callback every hour, starting now: .PP .Vb 4 \& struct ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, \& fmod (ev_now (loop), 3600.), 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .ie n .Sh """ev_signal"" \- signal me when a signal gets signalled!" .el .Sh "\f(CWev_signal\fP \- signal me when a signal gets signalled!" .IX Subsection "ev_signal - signal me when a signal gets signalled!" Signal watchers will trigger an event when the process receives a specific signal one or more times. Even though signals are very asynchronous, libev will try it's best to deliver signals synchronously, i.e. as part of the normal event processing, like any other event. .PP You can configure as many watchers as you like per signal. Only when the first watcher gets started will libev actually register a signal watcher with the kernel (thus it coexists with your own signal handlers as long as you don't register any with libev). Similarly, when the last signal watcher for a signal is stopped libev will reset the signal handler to \&\s-1SIG_DFL\s0 (regardless of what it was set to before). .PP If possible and supported, libev will install its handlers with \&\f(CW\*(C`SA_RESTART\*(C'\fR behaviour enabled, so syscalls should not be unduly interrupted. If you have a problem with syscalls getting interrupted by signals you can block all signals in an \f(CW\*(C`ev_check\*(C'\fR watcher and unblock them in an \f(CW\*(C`ev_prepare\*(C'\fR watcher. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_signal_init (ev_signal *, callback, int signum)" 4 .IX Item "ev_signal_init (ev_signal *, callback, int signum)" .PD 0 .IP "ev_signal_set (ev_signal *, int signum)" 4 .IX Item "ev_signal_set (ev_signal *, int signum)" .PD Configures the watcher to trigger on the given signal number (usually one of the \f(CW\*(C`SIGxxx\*(C'\fR constants). .IP "int signum [read\-only]" 4 .IX Item "int signum [read-only]" The signal the watcher watches out for. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to exit cleanly on \s-1SIGINT\s0 and \s-1SIGTERM\s0. .PP .Vb 5 \& static void \& sigint_cb (struct ev_loop *loop, struct ev_signal *w, int revents) \& { \& ev_unloop (loop, EVUNLOOP_ALL); \& } \& \& struct ev_signal signal_watcher; \& ev_signal_init (&signal_watcher, sigint_cb, SIGINT); \& ev_signal_start (loop, &sigint_cb); .Ve .ie n .Sh """ev_child"" \- watch out for process status changes" .el .Sh "\f(CWev_child\fP \- watch out for process status changes" .IX Subsection "ev_child - watch out for process status changes" Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to some child status changes (most typically when a child of yours dies). It is permissible to install a child watcher \fIafter\fR the child has been forked (which implies it might have already exited), as long as the event loop isn't entered (or is continued from a watcher). .PP Only the default event loop is capable of handling signals, and therefore you can only rgeister child watchers in the default event loop. .PP \fIProcess Interaction\fR .IX Subsection "Process Interaction" .PP Libev grabs \f(CW\*(C`SIGCHLD\*(C'\fR as soon as the default event loop is initialised. This is necessary to guarantee proper behaviour even if the first child watcher is started after the child exits. The occurance of \f(CW\*(C`SIGCHLD\*(C'\fR is recorded asynchronously, but child reaping is done synchronously as part of the event loop processing. Libev always reaps all children, even ones not watched. .PP \fIOverriding the Built-In Processing\fR .IX Subsection "Overriding the Built-In Processing" .PP Libev offers no special support for overriding the built-in child processing, but if your application collides with libev's default child handler, you can override it easily by installing your own handler for \&\f(CW\*(C`SIGCHLD\*(C'\fR after initialising the default loop, and making sure the default loop never gets destroyed. You are encouraged, however, to use an event-based approach to child reaping and thus use libev's support for that, so other libev users can use \f(CW\*(C`ev_child\*(C'\fR watchers freely. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_child_init (ev_child *, callback, int pid, int trace)" 4 .IX Item "ev_child_init (ev_child *, callback, int pid, int trace)" .PD 0 .IP "ev_child_set (ev_child *, int pid, int trace)" 4 .IX Item "ev_child_set (ev_child *, int pid, int trace)" .PD Configures the watcher to wait for status changes of process \f(CW\*(C`pid\*(C'\fR (or \&\fIany\fR process if \f(CW\*(C`pid\*(C'\fR is specified as \f(CW0\fR). The callback can look at the \f(CW\*(C`rstatus\*(C'\fR member of the \f(CW\*(C`ev_child\*(C'\fR watcher structure to see the status word (use the macros from \f(CW\*(C`sys/wait.h\*(C'\fR and see your systems \&\f(CW\*(C`waitpid\*(C'\fR documentation). The \f(CW\*(C`rpid\*(C'\fR member contains the pid of the process causing the status change. \f(CW\*(C`trace\*(C'\fR must be either \f(CW0\fR (only activate the watcher when the process terminates) or \f(CW1\fR (additionally activate the watcher when the process is stopped or continued). .IP "int pid [read\-only]" 4 .IX Item "int pid [read-only]" The process id this watcher watches out for, or \f(CW0\fR, meaning any process id. .IP "int rpid [read\-write]" 4 .IX Item "int rpid [read-write]" The process id that detected a status change. .IP "int rstatus [read\-write]" 4 .IX Item "int rstatus [read-write]" The process exit/trace status caused by \f(CW\*(C`rpid\*(C'\fR (see your systems \&\f(CW\*(C`waitpid\*(C'\fR and \f(CW\*(C`sys/wait.h\*(C'\fR documentation for details). .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: \f(CW\*(C`fork()\*(C'\fR a new process and install a child handler to wait for its completion. .PP .Vb 1 \& ev_child cw; \& \& static void \& child_cb (EV_P_ struct ev_child *w, int revents) \& { \& ev_child_stop (EV_A_ w); \& printf ("process %d exited with status %x\en", w\->rpid, w\->rstatus); \& } \& \& pid_t pid = fork (); \& \& if (pid < 0) \& // error \& else if (pid == 0) \& { \& // the forked child executes here \& exit (1); \& } \& else \& { \& ev_child_init (&cw, child_cb, pid, 0); \& ev_child_start (EV_DEFAULT_ &cw); \& } .Ve .ie n .Sh """ev_stat"" \- did the file attributes just change?" .el .Sh "\f(CWev_stat\fP \- did the file attributes just change?" .IX Subsection "ev_stat - did the file attributes just change?" This watches a filesystem path for attribute changes. That is, it calls \&\f(CW\*(C`stat\*(C'\fR regularly (or when the \s-1OS\s0 says it changed) and sees if it changed compared to the last time, invoking the callback if it did. .PP The path does not need to exist: changing from \*(L"path exists\*(R" to \*(L"path does not exist\*(R" is a status change like any other. The condition \*(L"path does not exist\*(R" is signified by the \f(CW\*(C`st_nlink\*(C'\fR field being zero (which is otherwise always forced to be at least one) and all the other fields of the stat buffer having unspecified contents. .PP The path \fIshould\fR be absolute and \fImust not\fR end in a slash. If it is relative and your working directory changes, the behaviour is undefined. .PP Since there is no standard to do this, the portable implementation simply calls \f(CW\*(C`stat (2)\*(C'\fR regularly on the path to see if it changed somehow. You can specify a recommended polling interval for this case. If you specify a polling interval of \f(CW0\fR (highly recommended!) then a \fIsuitable, unspecified default\fR value will be used (which you can expect to be around five seconds, although this might change dynamically). Libev will also impose a minimum interval which is currently around \f(CW0.1\fR, but thats usually overkill. .PP This watcher type is not meant for massive numbers of stat watchers, as even with OS-supported change notifications, this can be resource-intensive. .PP At the time of this writing, only the Linux inotify interface is implemented (implementing kqueue support is left as an exercise for the reader, note, however, that the author sees no way of implementing ev_stat semantics with kqueue). Inotify will be used to give hints only and should not change the semantics of \f(CW\*(C`ev_stat\*(C'\fR watchers, which means that libev sometimes needs to fall back to regular polling again even with inotify, but changes are usually detected immediately, and if the file exists there will be no polling. .PP \fI\s-1ABI\s0 Issues (Largefile Support)\fR .IX Subsection "ABI Issues (Largefile Support)" .PP Libev by default (unless the user overrides this) uses the default compilation environment, which means that on systems with optionally disabled large file support, you get the 32 bit version of the stat structure. When using the library from programs that change the \s-1ABI\s0 to use 64 bit file offsets the programs will fail. In that case you have to compile libev with the same flags to get binary compatibility. This is obviously the case with any flags that change the \s-1ABI\s0, but the problem is most noticably with ev_stat and largefile support. .PP \fIInotify\fR .IX Subsection "Inotify" .PP When \f(CW\*(C`inotify (7)\*(C'\fR support has been compiled into libev (generally only available on Linux) and present at runtime, it will be used to speed up change detection where possible. The inotify descriptor will be created lazily when the first \f(CW\*(C`ev_stat\*(C'\fR watcher is being started. .PP Inotify presence does not change the semantics of \f(CW\*(C`ev_stat\*(C'\fR watchers except that changes might be detected earlier, and in some cases, to avoid making regular \f(CW\*(C`stat\*(C'\fR calls. Even in the presence of inotify support there are many cases where libev has to resort to regular \f(CW\*(C`stat\*(C'\fR polling. .PP (There is no support for kqueue, as apparently it cannot be used to implement this functionality, due to the requirement of having a file descriptor open on the object at all times). .PP \fIThe special problem of stat time resolution\fR .IX Subsection "The special problem of stat time resolution" .PP The \f(CW\*(C`stat ()\*(C'\fR syscall only supports full-second resolution portably, and even on systems where the resolution is higher, many filesystems still only support whole seconds. .PP That means that, if the time is the only thing that changes, you can easily miss updates: on the first update, \f(CW\*(C`ev_stat\*(C'\fR detects a change and calls your callback, which does something. When there is another update within the same second, \f(CW\*(C`ev_stat\*(C'\fR will be unable to detect it as the stat data does not change. .PP The solution to this is to delay acting on a change for slightly more than second (or till slightly after the next full second boundary), using a roughly one-second-delay \f(CW\*(C`ev_timer\*(C'\fR (e.g. \f(CW\*(C`ev_timer_set (w, 0., 1.02); ev_timer_again (loop, w)\*(C'\fR). .PP The \f(CW.02\fR offset is added to work around small timing inconsistencies of some operating systems (where the second counter of the current time might be be delayed. One such system is the Linux kernel, where a call to \&\f(CW\*(C`gettimeofday\*(C'\fR might return a timestamp with a full second later than a subsequent \f(CW\*(C`time\*(C'\fR call \- if the equivalent of \f(CW\*(C`time ()\*(C'\fR is used to update file times then there will be a small window where the kernel uses the previous second to update file times but libev might already execute the timer callback). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" .PD 0 .IP "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" .PD Configures the watcher to wait for status changes of the given \&\f(CW\*(C`path\*(C'\fR. The \f(CW\*(C`interval\*(C'\fR is a hint on how quickly a change is expected to be detected and should normally be specified as \f(CW0\fR to let libev choose a suitable value. The memory pointed to by \f(CW\*(C`path\*(C'\fR must point to the same path for as long as the watcher is active. .Sp The callback will receive \f(CW\*(C`EV_STAT\*(C'\fR when a change was detected, relative to the attributes at the time the watcher was started (or the last change was detected). .IP "ev_stat_stat (loop, ev_stat *)" 4 .IX Item "ev_stat_stat (loop, ev_stat *)" Updates the stat buffer immediately with new values. If you change the watched path in your callback, you could call this function to avoid detecting this change (while introducing a race condition if you are not the only one changing the path). Can also be useful simply to find out the new values. .IP "ev_statdata attr [read\-only]" 4 .IX Item "ev_statdata attr [read-only]" The most-recently detected attributes of the file. Although the type is \&\f(CW\*(C`ev_statdata\*(C'\fR, this is usually the (or one of the) \f(CW\*(C`struct stat\*(C'\fR types suitable for your system, but you can only rely on the POSIX-standardised members to be present. If the \f(CW\*(C`st_nlink\*(C'\fR member is \f(CW0\fR, then there was some error while \f(CW\*(C`stat\*(C'\fRing the file. .IP "ev_statdata prev [read\-only]" 4 .IX Item "ev_statdata prev [read-only]" The previous attributes of the file. The callback gets invoked whenever \&\f(CW\*(C`prev\*(C'\fR != \f(CW\*(C`attr\*(C'\fR, or, more precisely, one or more of these members differ: \f(CW\*(C`st_dev\*(C'\fR, \f(CW\*(C`st_ino\*(C'\fR, \f(CW\*(C`st_mode\*(C'\fR, \f(CW\*(C`st_nlink\*(C'\fR, \f(CW\*(C`st_uid\*(C'\fR, \&\f(CW\*(C`st_gid\*(C'\fR, \f(CW\*(C`st_rdev\*(C'\fR, \f(CW\*(C`st_size\*(C'\fR, \f(CW\*(C`st_atime\*(C'\fR, \f(CW\*(C`st_mtime\*(C'\fR, \f(CW\*(C`st_ctime\*(C'\fR. .IP "ev_tstamp interval [read\-only]" 4 .IX Item "ev_tstamp interval [read-only]" The specified interval. .IP "const char *path [read\-only]" 4 .IX Item "const char *path [read-only]" The filesystem path that is being watched. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Watch \f(CW\*(C`/etc/passwd\*(C'\fR for attribute changes. .PP .Vb 10 \& static void \& passwd_cb (struct ev_loop *loop, ev_stat *w, int revents) \& { \& /* /etc/passwd changed in some way */ \& if (w\->attr.st_nlink) \& { \& printf ("passwd current size %ld\en", (long)w\->attr.st_size); \& printf ("passwd current atime %ld\en", (long)w\->attr.st_mtime); \& printf ("passwd current mtime %ld\en", (long)w\->attr.st_mtime); \& } \& else \& /* you shalt not abuse printf for puts */ \& puts ("wow, /etc/passwd is not there, expect problems. " \& "if this is windows, they already arrived\en"); \& } \& \& ... \& ev_stat passwd; \& \& ev_stat_init (&passwd, passwd_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); .Ve .PP Example: Like above, but additionally use a one-second delay so we do not miss updates (however, frequent updates will delay processing, too, so one might do the work both on \f(CW\*(C`ev_stat\*(C'\fR callback invocation \fIand\fR on \&\f(CW\*(C`ev_timer\*(C'\fR callback invocation). .PP .Vb 2 \& static ev_stat passwd; \& static ev_timer timer; \& \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_timer_stop (EV_A_ w); \& \& /* now it\*(Aqs one second after the most recent passwd change */ \& } \& \& static void \& stat_cb (EV_P_ ev_stat *w, int revents) \& { \& /* reset the one\-second timer */ \& ev_timer_again (EV_A_ &timer); \& } \& \& ... \& ev_stat_init (&passwd, stat_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); \& ev_timer_init (&timer, timer_cb, 0., 1.02); .Ve .ie n .Sh """ev_idle"" \- when you've got nothing better to do..." .el .Sh "\f(CWev_idle\fP \- when you've got nothing better to do..." .IX Subsection "ev_idle - when you've got nothing better to do..." Idle watchers trigger events when no other events of the same or higher priority are pending (prepare, check and other idle watchers do not count). .PP That is, as long as your process is busy handling sockets or timeouts (or even signals, imagine) of the same or higher priority it will not be triggered. But when your process is idle (or only lower-priority watchers are pending), the idle watchers are being called once per event loop iteration \- until stopped, that is, or your process receives more events and becomes busy again with higher priority stuff. .PP The most noteworthy effect is that as long as any idle watchers are active, the process will not block when waiting for new events. .PP Apart from keeping your process non-blocking (which is a useful effect on its own sometimes), idle watchers are a good place to do \&\*(L"pseudo-background processing\*(R", or delay processing stuff to after the event loop has handled all outstanding events. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_idle_init (ev_signal *, callback)" 4 .IX Item "ev_idle_init (ev_signal *, callback)" Initialises and configures the idle watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_idle_set\*(C'\fR macro, but using it is utterly pointless, believe me. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Dynamically allocate an \f(CW\*(C`ev_idle\*(C'\fR watcher, start it, and in the callback, free it. Also, use no error checking, as usual. .PP .Vb 7 \& static void \& idle_cb (struct ev_loop *loop, struct ev_idle *w, int revents) \& { \& free (w); \& // now do something you wanted to do when the program has \& // no longer anything immediate to do. \& } \& \& struct ev_idle *idle_watcher = malloc (sizeof (struct ev_idle)); \& ev_idle_init (idle_watcher, idle_cb); \& ev_idle_start (loop, idle_cb); .Ve .ie n .Sh """ev_prepare""\fP and \f(CW""ev_check"" \- customise your event loop!" .el .Sh "\f(CWev_prepare\fP and \f(CWev_check\fP \- customise your event loop!" .IX Subsection "ev_prepare and ev_check - customise your event loop!" Prepare and check watchers are usually (but not always) used in tandem: prepare watchers get invoked before the process blocks and check watchers afterwards. .PP You \fImust not\fR call \f(CW\*(C`ev_loop\*(C'\fR or similar functions that enter the current event loop from either \f(CW\*(C`ev_prepare\*(C'\fR or \f(CW\*(C`ev_check\*(C'\fR watchers. Other loops than the current one are fine, however. The rationale behind this is that you do not need to check for recursion in those watchers, i.e. the sequence will always be \f(CW\*(C`ev_prepare\*(C'\fR, blocking, \&\f(CW\*(C`ev_check\*(C'\fR so if you have one watcher of each kind they will always be called in pairs bracketing the blocking call. .PP Their main purpose is to integrate other event mechanisms into libev and their use is somewhat advanced. This could be used, for example, to track variable changes, implement your own watchers, integrate net-snmp or a coroutine library and lots more. They are also occasionally useful if you cache some data and want to flush it before blocking (for example, in X programs you might want to do an \f(CW\*(C`XFlush ()\*(C'\fR in an \f(CW\*(C`ev_prepare\*(C'\fR watcher). .PP This is done by examining in each prepare call which file descriptors need to be watched by the other library, registering \f(CW\*(C`ev_io\*(C'\fR watchers for them and starting an \f(CW\*(C`ev_timer\*(C'\fR watcher for any timeouts (many libraries provide just this functionality). Then, in the check watcher you check for any events that occured (by checking the pending status of all watchers and stopping them) and call back into the library. The I/O and timer callbacks will never actually be called (but must be valid nevertheless, because you never know, you know?). .PP As another example, the Perl Coro module uses these hooks to integrate coroutines into libev programs, by yielding to other active coroutines during each prepare and only letting the process block if no coroutines are ready to run (it's actually more complicated: it only runs coroutines with priority higher than or equal to the event loop and one coroutine of lower priority, but only once, using idle watchers to keep the event loop from blocking if lower-priority coroutines are active, thus mapping low-priority coroutines to idle/background tasks). .PP It is recommended to give \f(CW\*(C`ev_check\*(C'\fR watchers highest (\f(CW\*(C`EV_MAXPRI\*(C'\fR) priority, to ensure that they are being run before any other watchers after the poll. Also, \f(CW\*(C`ev_check\*(C'\fR watchers (and \f(CW\*(C`ev_prepare\*(C'\fR watchers, too) should not activate (\*(L"feed\*(R") events into libev. While libev fully supports this, they might get executed before other \f(CW\*(C`ev_check\*(C'\fR watchers did their job. As \f(CW\*(C`ev_check\*(C'\fR watchers are often used to embed other (non-libev) event loops those other event loops might be in an unusable state until their \f(CW\*(C`ev_check\*(C'\fR watcher ran (always remind yourself to coexist peacefully with others). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_prepare_init (ev_prepare *, callback)" 4 .IX Item "ev_prepare_init (ev_prepare *, callback)" .PD 0 .IP "ev_check_init (ev_check *, callback)" 4 .IX Item "ev_check_init (ev_check *, callback)" .PD Initialises and configures the prepare or check watcher \- they have no parameters of any kind. There are \f(CW\*(C`ev_prepare_set\*(C'\fR and \f(CW\*(C`ev_check_set\*(C'\fR macros, but using them is utterly, utterly and completely pointless. .PP \fIExamples\fR .IX Subsection "Examples" .PP There are a number of principal ways to embed other event loops or modules into libev. Here are some ideas on how to include libadns into libev (there is a Perl module named \f(CW\*(C`EV::ADNS\*(C'\fR that does this, which you could use as a working example. Another Perl module named \f(CW\*(C`EV::Glib\*(C'\fR embeds a Glib main context into libev, and finally, \f(CW\*(C`Glib::EV\*(C'\fR embeds \s-1EV\s0 into the Glib event loop). .PP Method 1: Add \s-1IO\s0 watchers and a timeout watcher in a prepare handler, and in a check watcher, destroy them and call into libadns. What follows is pseudo-code only of course. This requires you to either use a low priority for the check watcher or use \f(CW\*(C`ev_clear_pending\*(C'\fR explicitly, as the callbacks for the IO/timeout watchers might not have been called yet. .PP .Vb 2 \& static ev_io iow [nfd]; \& static ev_timer tw; \& \& static void \& io_cb (ev_loop *loop, ev_io *w, int revents) \& { \& } \& \& // create io watchers for each fd and a timer before blocking \& static void \& adns_prepare_cb (ev_loop *loop, ev_prepare *w, int revents) \& { \& int timeout = 3600000; \& struct pollfd fds [nfd]; \& // actual code will need to loop here and realloc etc. \& adns_beforepoll (ads, fds, &nfd, &timeout, timeval_from (ev_time ())); \& \& /* the callback is illegal, but won\*(Aqt be called as we stop during check */ \& ev_timer_init (&tw, 0, timeout * 1e\-3); \& ev_timer_start (loop, &tw); \& \& // create one ev_io per pollfd \& for (int i = 0; i < nfd; ++i) \& { \& ev_io_init (iow + i, io_cb, fds [i].fd, \& ((fds [i].events & POLLIN ? EV_READ : 0) \& | (fds [i].events & POLLOUT ? EV_WRITE : 0))); \& \& fds [i].revents = 0; \& ev_io_start (loop, iow + i); \& } \& } \& \& // stop all watchers after blocking \& static void \& adns_check_cb (ev_loop *loop, ev_check *w, int revents) \& { \& ev_timer_stop (loop, &tw); \& \& for (int i = 0; i < nfd; ++i) \& { \& // set the relevant poll flags \& // could also call adns_processreadable etc. here \& struct pollfd *fd = fds + i; \& int revents = ev_clear_pending (iow + i); \& if (revents & EV_READ ) fd\->revents |= fd\->events & POLLIN; \& if (revents & EV_WRITE) fd\->revents |= fd\->events & POLLOUT; \& \& // now stop the watcher \& ev_io_stop (loop, iow + i); \& } \& \& adns_afterpoll (adns, fds, nfd, timeval_from (ev_now (loop)); \& } .Ve .PP Method 2: This would be just like method 1, but you run \f(CW\*(C`adns_afterpoll\*(C'\fR in the prepare watcher and would dispose of the check watcher. .PP Method 3: If the module to be embedded supports explicit event notification (adns does), you can also make use of the actual watcher callbacks, and only destroy/create the watchers in the prepare watcher. .PP .Vb 5 \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& adns_processtimeouts (ads, &tv_now); \& } \& \& static void \& io_cb (EV_P_ ev_io *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& if (revents & EV_READ ) adns_processreadable (ads, w\->fd, &tv_now); \& if (revents & EV_WRITE) adns_processwriteable (ads, w\->fd, &tv_now); \& } \& \& // do not ever call adns_afterpoll .Ve .PP Method 4: Do not use a prepare or check watcher because the module you want to embed is too inflexible to support it. Instead, youc na override their poll function. The drawback with this solution is that the main loop is now no longer controllable by \s-1EV\s0. The \f(CW\*(C`Glib::EV\*(C'\fR module does this. .PP .Vb 4 \& static gint \& event_poll_func (GPollFD *fds, guint nfds, gint timeout) \& { \& int got_events = 0; \& \& for (n = 0; n < nfds; ++n) \& // create/start io watcher that sets the relevant bits in fds[n] and increment got_events \& \& if (timeout >= 0) \& // create/start timer \& \& // poll \& ev_loop (EV_A_ 0); \& \& // stop timer again \& if (timeout >= 0) \& ev_timer_stop (EV_A_ &to); \& \& // stop io watchers again \- their callbacks should have set \& for (n = 0; n < nfds; ++n) \& ev_io_stop (EV_A_ iow [n]); \& \& return got_events; \& } .Ve .ie n .Sh """ev_embed"" \- when one backend isn't enough..." .el .Sh "\f(CWev_embed\fP \- when one backend isn't enough..." .IX Subsection "ev_embed - when one backend isn't enough..." This is a rather advanced watcher type that lets you embed one event loop into another (currently only \f(CW\*(C`ev_io\*(C'\fR events are supported in the embedded loop, other types of watchers might be handled in a delayed or incorrect fashion and must not be used). .PP There are primarily two reasons you would want that: work around bugs and prioritise I/O. .PP As an example for a bug workaround, the kqueue backend might only support sockets on some platform, so it is unusable as generic backend, but you still want to make use of it because you have many sockets and it scales so nicely. In this case, you would create a kqueue-based loop and embed it into your default loop (which might use e.g. poll). Overall operation will be a bit slower because first libev has to poll and then call kevent, but at least you can use both at what they are best. .PP As for prioritising I/O: rarely you have the case where some fds have to be watched and handled very quickly (with low latency), and even priorities and idle watchers might have too much overhead. In this case you would put all the high priority stuff in one loop and all the rest in a second one, and embed the second one in the first. .PP As long as the watcher is active, the callback will be invoked every time there might be events pending in the embedded loop. The callback must then call \f(CW\*(C`ev_embed_sweep (mainloop, watcher)\*(C'\fR to make a single sweep and invoke their callbacks (you could also start an idle watcher to give the embedded loop strictly lower priority for example). You can also set the callback to \f(CW0\fR, in which case the embed watcher will automatically execute the embedded loop sweep. .PP As long as the watcher is started it will automatically handle events. The callback will be invoked whenever some events have been handled. You can set the callback to \f(CW0\fR to avoid having to specify one if you are not interested in that. .PP Also, there have not currently been made special provisions for forking: when you fork, you not only have to call \f(CW\*(C`ev_loop_fork\*(C'\fR on both loops, but you will also have to stop and restart any \f(CW\*(C`ev_embed\*(C'\fR watchers yourself. .PP Unfortunately, not all backends are embeddable, only the ones returned by \&\f(CW\*(C`ev_embeddable_backends\*(C'\fR are, which, unfortunately, does not include any portable one. .PP So when you want to use this feature you will always have to be prepared that you cannot get an embeddable loop. The recommended way to get around this is to have a separate variables for your embeddable loop, try to create it, and if that fails, use the normal loop for everything. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" .PD 0 .IP "ev_embed_set (ev_embed *, callback, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_set (ev_embed *, callback, struct ev_loop *embedded_loop)" .PD Configures the watcher to embed the given loop, which must be embeddable. If the callback is \f(CW0\fR, then \f(CW\*(C`ev_embed_sweep\*(C'\fR will be invoked automatically, otherwise it is the responsibility of the callback to invoke it (it will continue to be called until the sweep has been done, if you do not want thta, you need to temporarily stop the embed watcher). .IP "ev_embed_sweep (loop, ev_embed *)" 4 .IX Item "ev_embed_sweep (loop, ev_embed *)" Make a single, non-blocking sweep over the embedded loop. This works similarly to \f(CW\*(C`ev_loop (embedded_loop, EVLOOP_NONBLOCK)\*(C'\fR, but in the most apropriate way for embedded loops. .IP "struct ev_loop *other [read\-only]" 4 .IX Item "struct ev_loop *other [read-only]" The embedded event loop. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to get an embeddable event loop and embed it into the default event loop. If that is not possible, use the default loop. The default loop is stored in \f(CW\*(C`loop_hi\*(C'\fR, while the mebeddable loop is stored in \&\f(CW\*(C`loop_lo\*(C'\fR (which is \f(CW\*(C`loop_hi\*(C'\fR in the acse no embeddable loop can be used). .PP .Vb 3 \& struct ev_loop *loop_hi = ev_default_init (0); \& struct ev_loop *loop_lo = 0; \& struct ev_embed embed; \& \& // see if there is a chance of getting one that works \& // (remember that a flags value of 0 means autodetection) \& loop_lo = ev_embeddable_backends () & ev_recommended_backends () \& ? ev_loop_new (ev_embeddable_backends () & ev_recommended_backends ()) \& : 0; \& \& // if we got one, then embed it, otherwise default to loop_hi \& if (loop_lo) \& { \& ev_embed_init (&embed, 0, loop_lo); \& ev_embed_start (loop_hi, &embed); \& } \& else \& loop_lo = loop_hi; .Ve .PP Example: Check if kqueue is available but not recommended and create a kqueue backend for use with sockets (which usually work with any kqueue implementation). Store the kqueue/socket\-only event loop in \&\f(CW\*(C`loop_socket\*(C'\fR. (One might optionally use \f(CW\*(C`EVFLAG_NOENV\*(C'\fR, too). .PP .Vb 3 \& struct ev_loop *loop = ev_default_init (0); \& struct ev_loop *loop_socket = 0; \& struct ev_embed embed; \& \& if (ev_supported_backends () & ~ev_recommended_backends () & EVBACKEND_KQUEUE) \& if ((loop_socket = ev_loop_new (EVBACKEND_KQUEUE)) \& { \& ev_embed_init (&embed, 0, loop_socket); \& ev_embed_start (loop, &embed); \& } \& \& if (!loop_socket) \& loop_socket = loop; \& \& // now use loop_socket for all sockets, and loop for everything else .Ve .ie n .Sh """ev_fork"" \- the audacity to resume the event loop after a fork" .el .Sh "\f(CWev_fork\fP \- the audacity to resume the event loop after a fork" .IX Subsection "ev_fork - the audacity to resume the event loop after a fork" Fork watchers are called when a \f(CW\*(C`fork ()\*(C'\fR was detected (usually because whoever is a good citizen cared to tell libev about it by calling \&\f(CW\*(C`ev_default_fork\*(C'\fR or \f(CW\*(C`ev_loop_fork\*(C'\fR). The invocation is done before the event loop blocks next and before \f(CW\*(C`ev_check\*(C'\fR watchers are being called, and only in the child after the fork. If whoever good citizen calling \&\f(CW\*(C`ev_default_fork\*(C'\fR cheats and calls it in the wrong process, the fork handlers will be invoked, too, of course. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_fork_init (ev_signal *, callback)" 4 .IX Item "ev_fork_init (ev_signal *, callback)" Initialises and configures the fork watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_fork_set\*(C'\fR macro, but using it is utterly pointless, believe me. .ie n .Sh """ev_async"" \- how to wake up another event loop" .el .Sh "\f(CWev_async\fP \- how to wake up another event loop" .IX Subsection "ev_async - how to wake up another event loop" In general, you cannot use an \f(CW\*(C`ev_loop\*(C'\fR from multiple threads or other asynchronous sources such as signal handlers (as opposed to multiple event loops \- those are of course safe to use in different threads). .PP Sometimes, however, you need to wake up another event loop you do not control, for example because it belongs to another thread. This is what \&\f(CW\*(C`ev_async\*(C'\fR watchers do: as long as the \f(CW\*(C`ev_async\*(C'\fR watcher is active, you can signal it by calling \f(CW\*(C`ev_async_send\*(C'\fR, which is thread\- and signal safe. .PP This functionality is very similar to \f(CW\*(C`ev_signal\*(C'\fR watchers, as signals, too, are asynchronous in nature, and signals, too, will be compressed (i.e. the number of callback invocations may be less than the number of \&\f(CW\*(C`ev_async_sent\*(C'\fR calls). .PP Unlike \f(CW\*(C`ev_signal\*(C'\fR watchers, \f(CW\*(C`ev_async\*(C'\fR works with any event loop, not just the default loop. .PP \fIQueueing\fR .IX Subsection "Queueing" .PP \&\f(CW\*(C`ev_async\*(C'\fR does not support queueing of data in any way. The reason is that the author does not know of a simple (or any) algorithm for a multiple-writer-single-reader queue that works in all cases and doesn't need elaborate support such as pthreads. .PP That means that if you want to queue data, you have to provide your own queue. But at least I can tell you would implement locking around your queue: .IP "queueing from a signal handler context" 4 .IX Item "queueing from a signal handler context" To implement race-free queueing, you simply add to the queue in the signal handler but you block the signal handler in the watcher callback. Here is an example that does that for some fictitiuous \s-1SIGUSR1\s0 handler: .Sp .Vb 1 \& static ev_async mysig; \& \& static void \& sigusr1_handler (void) \& { \& sometype data; \& \& // no locking etc. \& queue_put (data); \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& sometype data; \& sigset_t block, prev; \& \& sigemptyset (&block); \& sigaddset (&block, SIGUSR1); \& sigprocmask (SIG_BLOCK, &block, &prev); \& \& while (queue_get (&data)) \& process (data); \& \& if (sigismember (&prev, SIGUSR1) \& sigprocmask (SIG_UNBLOCK, &block, 0); \& } .Ve .Sp (Note: pthreads in theory requires you to use \f(CW\*(C`pthread_setmask\*(C'\fR instead of \f(CW\*(C`sigprocmask\*(C'\fR when you use threads, but libev doesn't do it either...). .IP "queueing from a thread context" 4 .IX Item "queueing from a thread context" The strategy for threads is different, as you cannot (easily) block threads but you can easily preempt them, so to queue safely you need to employ a traditional mutex lock, such as in this pthread example: .Sp .Vb 2 \& static ev_async mysig; \& static pthread_mutex_t mymutex = PTHREAD_MUTEX_INITIALIZER; \& \& static void \& otherthread (void) \& { \& // only need to lock the actual queueing operation \& pthread_mutex_lock (&mymutex); \& queue_put (data); \& pthread_mutex_unlock (&mymutex); \& \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& pthread_mutex_lock (&mymutex); \& \& while (queue_get (&data)) \& process (data); \& \& pthread_mutex_unlock (&mymutex); \& } .Ve .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_async_init (ev_async *, callback)" 4 .IX Item "ev_async_init (ev_async *, callback)" Initialises and configures the async watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_asynd_set\*(C'\fR macro, but using it is utterly pointless, believe me. .IP "ev_async_send (loop, ev_async *)" 4 .IX Item "ev_async_send (loop, ev_async *)" Sends/signals/activates the given \f(CW\*(C`ev_async\*(C'\fR watcher, that is, feeds an \f(CW\*(C`EV_ASYNC\*(C'\fR event on the watcher into the event loop. Unlike \&\f(CW\*(C`ev_feed_event\*(C'\fR, this call is safe to do in other threads, signal or similar contexts (see the dicusssion of \f(CW\*(C`EV_ATOMIC_T\*(C'\fR in the embedding section below on what exactly this means). .Sp This call incurs the overhead of a syscall only once per loop iteration, so while the overhead might be noticable, it doesn't apply to repeated calls to \f(CW\*(C`ev_async_send\*(C'\fR. .IP "bool = ev_async_pending (ev_async *)" 4 .IX Item "bool = ev_async_pending (ev_async *)" Returns a non-zero value when \f(CW\*(C`ev_async_send\*(C'\fR has been called on the watcher but the event has not yet been processed (or even noted) by the event loop. .Sp \&\f(CW\*(C`ev_async_send\*(C'\fR sets a flag in the watcher and wakes up the loop. When the loop iterates next and checks for the watcher to have become active, it will reset the flag again. \f(CW\*(C`ev_async_pending\*(C'\fR can be used to very quickly check wether invoking the loop might be a good idea. .Sp Not that this does \fInot\fR check wether the watcher itself is pending, only wether it has been requested to make this watcher pending. .SH "OTHER FUNCTIONS" .IX Header "OTHER FUNCTIONS" There are some other functions of possible interest. Described. Here. Now. .IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4 .IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" This function combines a simple timer and an I/O watcher, calls your callback on whichever event happens first and automatically stop both watchers. This is useful if you want to wait for a single event on an fd or timeout without having to allocate/configure/start/stop/free one or more watchers yourself. .Sp If \f(CW\*(C`fd\*(C'\fR is less than 0, then no I/O watcher will be started and events is being ignored. Otherwise, an \f(CW\*(C`ev_io\*(C'\fR watcher for the given \f(CW\*(C`fd\*(C'\fR and \&\f(CW\*(C`events\*(C'\fR set will be craeted and started. .Sp If \f(CW\*(C`timeout\*(C'\fR is less than 0, then no timeout watcher will be started. Otherwise an \f(CW\*(C`ev_timer\*(C'\fR watcher with after = \f(CW\*(C`timeout\*(C'\fR (and repeat = 0) will be started. While \f(CW0\fR is a valid timeout, it is of dubious value. .Sp The callback has the type \f(CW\*(C`void (*cb)(int revents, void *arg)\*(C'\fR and gets passed an \f(CW\*(C`revents\*(C'\fR set like normal event callbacks (a combination of \&\f(CW\*(C`EV_ERROR\*(C'\fR, \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or \f(CW\*(C`EV_TIMEOUT\*(C'\fR) and the \f(CW\*(C`arg\*(C'\fR value passed to \f(CW\*(C`ev_once\*(C'\fR: .Sp .Vb 7 \& static void stdin_ready (int revents, void *arg) \& { \& if (revents & EV_TIMEOUT) \& /* doh, nothing entered */; \& else if (revents & EV_READ) \& /* stdin might have data for us, joy! */; \& } \& \& ev_once (STDIN_FILENO, EV_READ, 10., stdin_ready, 0); .Ve .IP "ev_feed_event (ev_loop *, watcher *, int revents)" 4 .IX Item "ev_feed_event (ev_loop *, watcher *, int revents)" Feeds the given event set into the event loop, as if the specified event had happened for the specified watcher (which must be a pointer to an initialised but not necessarily started event watcher). .IP "ev_feed_fd_event (ev_loop *, int fd, int revents)" 4 .IX Item "ev_feed_fd_event (ev_loop *, int fd, int revents)" Feed an event on the given fd, as if a file descriptor backend detected the given events it. .IP "ev_feed_signal_event (ev_loop *loop, int signum)" 4 .IX Item "ev_feed_signal_event (ev_loop *loop, int signum)" Feed an event as if the given signal occured (\f(CW\*(C`loop\*(C'\fR must be the default loop!). .SH "LIBEVENT EMULATION" .IX Header "LIBEVENT EMULATION" Libev offers a compatibility emulation layer for libevent. It cannot emulate the internals of libevent, so here are some usage hints: .IP "\(bu" 4 Use it by including , as usual. .IP "\(bu" 4 The following members are fully supported: ev_base, ev_callback, ev_arg, ev_fd, ev_res, ev_events. .IP "\(bu" 4 Avoid using ev_flags and the EVLIST_*\-macros, while it is maintained by libev, it does not work exactly the same way as in libevent (consider it a private \s-1API\s0). .IP "\(bu" 4 Priorities are not currently supported. Initialising priorities will fail and all watchers will have the same priority, even though there is an ev_pri field. .IP "\(bu" 4 In libevent, the last base created gets the signals, in libev, the first base created (== the default loop) gets the signals. .IP "\(bu" 4 Other members are not supported. .IP "\(bu" 4 The libev emulation is \fInot\fR \s-1ABI\s0 compatible to libevent, you need to use the libev header file and library. .SH "\*(C+ SUPPORT" .IX Header " SUPPORT" Libev comes with some simplistic wrapper classes for \*(C+ that mainly allow you to use some convinience methods to start/stop watchers and also change the callback model to a model using method callbacks on objects. .PP To use it, .PP .Vb 1 \& #include .Ve .PP This automatically includes \fIev.h\fR and puts all of its definitions (many of them macros) into the global namespace. All \*(C+ specific things are put into the \f(CW\*(C`ev\*(C'\fR namespace. It should support all the same embedding options as \fIev.h\fR, most notably \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. .PP Care has been taken to keep the overhead low. The only data member the \*(C+ classes add (compared to plain C\-style watchers) is the event loop pointer that the watcher is associated with (or no additional members at all if you disable \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR when embedding libev). .PP Currently, functions, and static and non-static member functions can be used as callbacks. Other types should be easy to add as long as they only need one additional pointer for context. If you need support for other types of functors please contact the author (preferably after implementing it). .PP Here is a list of things available in the \f(CW\*(C`ev\*(C'\fR namespace: .ie n .IP """ev::READ""\fR, \f(CW""ev::WRITE"" etc." 4 .el .IP "\f(CWev::READ\fR, \f(CWev::WRITE\fR etc." 4 .IX Item "ev::READ, ev::WRITE etc." These are just enum values with the same values as the \f(CW\*(C`EV_READ\*(C'\fR etc. macros from \fIev.h\fR. .ie n .IP """ev::tstamp""\fR, \f(CW""ev::now""" 4 .el .IP "\f(CWev::tstamp\fR, \f(CWev::now\fR" 4 .IX Item "ev::tstamp, ev::now" Aliases to the same types/functions as with the \f(CW\*(C`ev_\*(C'\fR prefix. .ie n .IP """ev::io""\fR, \f(CW""ev::timer""\fR, \f(CW""ev::periodic""\fR, \f(CW""ev::idle""\fR, \f(CW""ev::sig"" etc." 4 .el .IP "\f(CWev::io\fR, \f(CWev::timer\fR, \f(CWev::periodic\fR, \f(CWev::idle\fR, \f(CWev::sig\fR etc." 4 .IX Item "ev::io, ev::timer, ev::periodic, ev::idle, ev::sig etc." For each \f(CW\*(C`ev_TYPE\*(C'\fR watcher in \fIev.h\fR there is a corresponding class of the same name in the \f(CW\*(C`ev\*(C'\fR namespace, with the exception of \f(CW\*(C`ev_signal\*(C'\fR which is called \f(CW\*(C`ev::sig\*(C'\fR to avoid clashes with the \f(CW\*(C`signal\*(C'\fR macro defines by many implementations. .Sp All of those classes have these methods: .RS 4 .IP "ev::TYPE::TYPE ()" 4 .IX Item "ev::TYPE::TYPE ()" .PD 0 .IP "ev::TYPE::TYPE (struct ev_loop *)" 4 .IX Item "ev::TYPE::TYPE (struct ev_loop *)" .IP "ev::TYPE::~TYPE" 4 .IX Item "ev::TYPE::~TYPE" .PD The constructor (optionally) takes an event loop to associate the watcher with. If it is omitted, it will use \f(CW\*(C`EV_DEFAULT\*(C'\fR. .Sp The constructor calls \f(CW\*(C`ev_init\*(C'\fR for you, which means you have to call the \&\f(CW\*(C`set\*(C'\fR method before starting it. .Sp It will not set a callback, however: You have to call the templated \f(CW\*(C`set\*(C'\fR method to set a callback before you can start the watcher. .Sp (The reason why you have to use a method is a limitation in \*(C+ which does not allow explicit template arguments for constructors). .Sp The destructor automatically stops the watcher if it is active. .IP "w\->set (object *)" 4 .IX Item "w->set (object *)" This method sets the callback method to call. The method has to have a signature of \f(CW\*(C`void (*)(ev_TYPE &, int)\*(C'\fR, it receives the watcher as first argument and the \f(CW\*(C`revents\*(C'\fR as second. The object must be given as parameter and is stored in the \f(CW\*(C`data\*(C'\fR member of the watcher. .Sp This method synthesizes efficient thunking code to call your method from the C callback that libev requires. If your compiler can inline your callback (i.e. it is visible to it at the place of the \f(CW\*(C`set\*(C'\fR call and your compiler is good :), then the method will be fully inlined into the thunking function, making it as fast as a direct C callback. .Sp Example: simple class declaration and watcher initialisation .Sp .Vb 4 \& struct myclass \& { \& void io_cb (ev::io &w, int revents) { } \& } \& \& myclass obj; \& ev::io iow; \& iow.set (&obj); .Ve .IP "w\->set (void *data = 0)" 4 .IX Item "w->set (void *data = 0)" Also sets a callback, but uses a static method or plain function as callback. The optional \f(CW\*(C`data\*(C'\fR argument will be stored in the watcher's \&\f(CW\*(C`data\*(C'\fR member and is free for you to use. .Sp The prototype of the \f(CW\*(C`function\*(C'\fR must be \f(CW\*(C`void (*)(ev::TYPE &w, int)\*(C'\fR. .Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. .Sp Example: .Sp .Vb 2 \& static void io_cb (ev::io &w, int revents) { } \& iow.set (); .Ve .IP "w\->set (struct ev_loop *)" 4 .IX Item "w->set (struct ev_loop *)" Associates a different \f(CW\*(C`struct ev_loop\*(C'\fR with this watcher. You can only do this when the watcher is inactive (and not pending either). .IP "w\->set ([args])" 4 .IX Item "w->set ([args])" Basically the same as \f(CW\*(C`ev_TYPE_set\*(C'\fR, with the same args. Must be called at least once. Unlike the C counterpart, an active watcher gets automatically stopped and restarted when reconfiguring it with this method. .IP "w\->start ()" 4 .IX Item "w->start ()" Starts the watcher. Note that there is no \f(CW\*(C`loop\*(C'\fR argument, as the constructor already stores the event loop. .IP "w\->stop ()" 4 .IX Item "w->stop ()" Stops the watcher if it is active. Again, no \f(CW\*(C`loop\*(C'\fR argument. .ie n .IP "w\->again () (""ev::timer""\fR, \f(CW""ev::periodic"" only)" 4 .el .IP "w\->again () (\f(CWev::timer\fR, \f(CWev::periodic\fR only)" 4 .IX Item "w->again () (ev::timer, ev::periodic only)" For \f(CW\*(C`ev::timer\*(C'\fR and \f(CW\*(C`ev::periodic\*(C'\fR, this invokes the corresponding \&\f(CW\*(C`ev_TYPE_again\*(C'\fR function. .ie n .IP "w\->sweep () (""ev::embed"" only)" 4 .el .IP "w\->sweep () (\f(CWev::embed\fR only)" 4 .IX Item "w->sweep () (ev::embed only)" Invokes \f(CW\*(C`ev_embed_sweep\*(C'\fR. .ie n .IP "w\->update () (""ev::stat"" only)" 4 .el .IP "w\->update () (\f(CWev::stat\fR only)" 4 .IX Item "w->update () (ev::stat only)" Invokes \f(CW\*(C`ev_stat_stat\*(C'\fR. .RE .RS 4 .RE .PP Example: Define a class with an \s-1IO\s0 and idle watcher, start one of them in the constructor. .PP .Vb 4 \& class myclass \& { \& ev::io io; void io_cb (ev::io &w, int revents); \& ev:idle idle void idle_cb (ev::idle &w, int revents); \& \& myclass (int fd) \& { \& io .set (this); \& idle.set (this); \& \& io.start (fd, ev::READ); \& } \& }; .Ve .SH "OTHER LANGUAGE BINDINGS" .IX Header "OTHER LANGUAGE BINDINGS" Libev does not offer other language bindings itself, but bindings for a numbe rof languages exist in the form of third-party packages. If you know any interesting language binding in addition to the ones listed here, drop me a note. .IP "Perl" 4 .IX Item "Perl" The \s-1EV\s0 module implements the full libev \s-1API\s0 and is actually used to test libev. \s-1EV\s0 is developed together with libev. Apart from the \s-1EV\s0 core module, there are additional modules that implement libev-compatible interfaces to \f(CW\*(C`libadns\*(C'\fR (\f(CW\*(C`EV::ADNS\*(C'\fR), \f(CW\*(C`Net::SNMP\*(C'\fR (\f(CW\*(C`Net::SNMP::EV\*(C'\fR) and the \&\f(CW\*(C`libglib\*(C'\fR event core (\f(CW\*(C`Glib::EV\*(C'\fR and \f(CW\*(C`EV::Glib\*(C'\fR). .Sp It can be found and installed via \s-1CPAN\s0, its homepage is found at . .IP "Ruby" 4 .IX Item "Ruby" Tony Arcieri has written a ruby extension that offers access to a subset of the libev \s-1API\s0 and adds filehandle abstractions, asynchronous \s-1DNS\s0 and more on top of it. It can be found via gem servers. Its homepage is at . .IP "D" 4 .IX Item "D" Leandro Lucarella has written a D language binding (\fIev.d\fR) for libev, to be found at . .SH "MACRO MAGIC" .IX Header "MACRO MAGIC" Libev can be compiled with a variety of options, the most fundamantal of which is \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. This option determines whether (most) functions and callbacks have an initial \f(CW\*(C`struct ev_loop *\*(C'\fR argument. .PP To make it easier to write programs that cope with either variant, the following macros are defined: .ie n .IP """EV_A""\fR, \f(CW""EV_A_""" 4 .el .IP "\f(CWEV_A\fR, \f(CWEV_A_\fR" 4 .IX Item "EV_A, EV_A_" This provides the loop \fIargument\fR for functions, if one is required (\*(L"ev loop argument\*(R"). The \f(CW\*(C`EV_A\*(C'\fR form is used when this is the sole argument, \&\f(CW\*(C`EV_A_\*(C'\fR is used when other arguments are following. Example: .Sp .Vb 3 \& ev_unref (EV_A); \& ev_timer_add (EV_A_ watcher); \& ev_loop (EV_A_ 0); .Ve .Sp It assumes the variable \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR is in scope, which is often provided by the following macro. .ie n .IP """EV_P""\fR, \f(CW""EV_P_""" 4 .el .IP "\f(CWEV_P\fR, \f(CWEV_P_\fR" 4 .IX Item "EV_P, EV_P_" This provides the loop \fIparameter\fR for functions, if one is required (\*(L"ev loop parameter\*(R"). The \f(CW\*(C`EV_P\*(C'\fR form is used when this is the sole parameter, \&\f(CW\*(C`EV_P_\*(C'\fR is used when other parameters are following. Example: .Sp .Vb 2 \& // this is how ev_unref is being declared \& static void ev_unref (EV_P); \& \& // this is how you can declare your typical callback \& static void cb (EV_P_ ev_timer *w, int revents) .Ve .Sp It declares a parameter \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR, quite suitable for use with \f(CW\*(C`EV_A\*(C'\fR. .ie n .IP """EV_DEFAULT""\fR, \f(CW""EV_DEFAULT_""" 4 .el .IP "\f(CWEV_DEFAULT\fR, \f(CWEV_DEFAULT_\fR" 4 .IX Item "EV_DEFAULT, EV_DEFAULT_" Similar to the other two macros, this gives you the value of the default loop, if multiple loops are supported (\*(L"ev loop default\*(R"). .ie n .IP """EV_DEFAULT_UC""\fR, \f(CW""EV_DEFAULT_UC_""" 4 .el .IP "\f(CWEV_DEFAULT_UC\fR, \f(CWEV_DEFAULT_UC_\fR" 4 .IX Item "EV_DEFAULT_UC, EV_DEFAULT_UC_" Usage identical to \f(CW\*(C`EV_DEFAULT\*(C'\fR and \f(CW\*(C`EV_DEFAULT_\*(C'\fR, but requires that the default loop has been initialised (\f(CW\*(C`UC\*(C'\fR == unchecked). Their behaviour is undefined when the default loop has not been initialised by a previous execution of \f(CW\*(C`EV_DEFAULT\*(C'\fR, \f(CW\*(C`EV_DEFAULT_\*(C'\fR or \f(CW\*(C`ev_default_init (...)\*(C'\fR. .Sp It is often prudent to use \f(CW\*(C`EV_DEFAULT\*(C'\fR when initialising the first watcher in a function but use \f(CW\*(C`EV_DEFAULT_UC\*(C'\fR afterwards. .PP Example: Declare and initialise a check watcher, utilising the above macros so it will work regardless of whether multiple loops are supported or not. .PP .Vb 5 \& static void \& check_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_check_stop (EV_A_ w); \& } \& \& ev_check check; \& ev_check_init (&check, check_cb); \& ev_check_start (EV_DEFAULT_ &check); \& ev_loop (EV_DEFAULT_ 0); .Ve .SH "EMBEDDING" .IX Header "EMBEDDING" Libev can (and often is) directly embedded into host applications. Examples of applications that embed it include the Deliantra Game Server, the \s-1EV\s0 perl module, the \s-1GNU\s0 Virtual Private Ethernet (gvpe) and rxvt-unicode. .PP The goal is to enable you to just copy the necessary files into your source directory without having to change even a single line in them, so you can easily upgrade by simply copying (or having a checked-out copy of libev somewhere in your source tree). .Sh "\s-1FILESETS\s0" .IX Subsection "FILESETS" Depending on what features you need you need to include one or more sets of files in your app. .PP \fI\s-1CORE\s0 \s-1EVENT\s0 \s-1LOOP\s0\fR .IX Subsection "CORE EVENT LOOP" .PP To include only the libev core (all the \f(CW\*(C`ev_*\*(C'\fR functions), with manual configuration (no autoconf): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.c" .Ve .PP This will automatically include \fIev.h\fR, too, and should be done in a single C source file only to provide the function implementations. To use it, do the same for \fIev.h\fR in all files wishing to use this \s-1API\s0 (best done by writing a wrapper around \fIev.h\fR that you can include instead and where you can put other configuration options): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.h" .Ve .PP Both header files and implementation files can be compiled with a \*(C+ compiler (at least, thats a stated goal, and breakage will be treated as a bug). .PP You need the following files in your source tree, or in a directory in your include path (e.g. in libev/ when using \-Ilibev): .PP .Vb 4 \& ev.h \& ev.c \& ev_vars.h \& ev_wrap.h \& \& ev_win32.c required on win32 platforms only \& \& ev_select.c only when select backend is enabled (which is enabled by default) \& ev_poll.c only when poll backend is enabled (disabled by default) \& ev_epoll.c only when the epoll backend is enabled (disabled by default) \& ev_kqueue.c only when the kqueue backend is enabled (disabled by default) \& ev_port.c only when the solaris port backend is enabled (disabled by default) .Ve .PP \&\fIev.c\fR includes the backend files directly when enabled, so you only need to compile this single file. .PP \fI\s-1LIBEVENT\s0 \s-1COMPATIBILITY\s0 \s-1API\s0\fR .IX Subsection "LIBEVENT COMPATIBILITY API" .PP To include the libevent compatibility \s-1API\s0, also include: .PP .Vb 1 \& #include "event.c" .Ve .PP in the file including \fIev.c\fR, and: .PP .Vb 1 \& #include "event.h" .Ve .PP in the files that want to use the libevent \s-1API\s0. This also includes \fIev.h\fR. .PP You need the following additional files for this: .PP .Vb 2 \& event.h \& event.c .Ve .PP \fI\s-1AUTOCONF\s0 \s-1SUPPORT\s0\fR .IX Subsection "AUTOCONF SUPPORT" .PP Instead of using \f(CW\*(C`EV_STANDALONE=1\*(C'\fR and providing your config in whatever way you want, you can also \f(CW\*(C`m4_include([libev.m4])\*(C'\fR in your \&\fIconfigure.ac\fR and leave \f(CW\*(C`EV_STANDALONE\*(C'\fR undefined. \fIev.c\fR will then include \fIconfig.h\fR and configure itself accordingly. .PP For this of course you need the m4 file: .PP .Vb 1 \& libev.m4 .Ve .Sh "\s-1PREPROCESSOR\s0 \s-1SYMBOLS/MACROS\s0" .IX Subsection "PREPROCESSOR SYMBOLS/MACROS" Libev can be configured via a variety of preprocessor symbols you have to define before including any of its files. The default in the absense of autoconf is noted for every option. .IP "\s-1EV_STANDALONE\s0" 4 .IX Item "EV_STANDALONE" Must always be \f(CW1\fR if you do not use autoconf configuration, which keeps libev from including \fIconfig.h\fR, and it also defines dummy implementations for some libevent functions (such as logging, which is not supported). It will also not define any of the structs usually found in \&\fIevent.h\fR that are not directly supported by the libev core alone. .IP "\s-1EV_USE_MONOTONIC\s0" 4 .IX Item "EV_USE_MONOTONIC" If defined to be \f(CW1\fR, libev will try to detect the availability of the monotonic clock option at both compiletime and runtime. Otherwise no use of the monotonic clock option will be attempted. If you enable this, you usually have to link against librt or something similar. Enabling it when the functionality isn't available is safe, though, although you have to make sure you link against any libraries where the \f(CW\*(C`clock_gettime\*(C'\fR function is hiding in (often \fI\-lrt\fR). .IP "\s-1EV_USE_REALTIME\s0" 4 .IX Item "EV_USE_REALTIME" If defined to be \f(CW1\fR, libev will try to detect the availability of the realtime clock option at compiletime (and assume its availability at runtime if successful). Otherwise no use of the realtime clock option will be attempted. This effectively replaces \f(CW\*(C`gettimeofday\*(C'\fR by \f(CW\*(C`clock_get (CLOCK_REALTIME, ...)\*(C'\fR and will not normally affect correctness. See the note about libraries in the description of \f(CW\*(C`EV_USE_MONOTONIC\*(C'\fR, though. .IP "\s-1EV_USE_NANOSLEEP\s0" 4 .IX Item "EV_USE_NANOSLEEP" If defined to be \f(CW1\fR, libev will assume that \f(CW\*(C`nanosleep ()\*(C'\fR is available and will use it for delays. Otherwise it will use \f(CW\*(C`select ()\*(C'\fR. .IP "\s-1EV_USE_EVENTFD\s0" 4 .IX Item "EV_USE_EVENTFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`eventfd ()\*(C'\fR is available and will probe for kernel support at runtime. This will improve \&\f(CW\*(C`ev_signal\*(C'\fR and \f(CW\*(C`ev_async\*(C'\fR performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. .IP "\s-1EV_USE_SELECT\s0" 4 .IX Item "EV_USE_SELECT" If undefined or defined to be \f(CW1\fR, libev will compile in support for the \&\f(CW\*(C`select\*(C'\fR(2) backend. No attempt at autodetection will be done: if no other method takes over, select will be it. Otherwise the select backend will not be compiled in. .IP "\s-1EV_SELECT_USE_FD_SET\s0" 4 .IX Item "EV_SELECT_USE_FD_SET" If defined to \f(CW1\fR, then the select backend will use the system \f(CW\*(C`fd_set\*(C'\fR structure. This is useful if libev doesn't compile due to a missing \&\f(CW\*(C`NFDBITS\*(C'\fR or \f(CW\*(C`fd_mask\*(C'\fR definition or it misguesses the bitset layout on exotic systems. This usually limits the range of file descriptors to some low limit such as 1024 or might have other limitations (winsocket only allows 64 sockets). The \f(CW\*(C`FD_SETSIZE\*(C'\fR macro, set before compilation, might influence the size of the \f(CW\*(C`fd_set\*(C'\fR used. .IP "\s-1EV_SELECT_IS_WINSOCKET\s0" 4 .IX Item "EV_SELECT_IS_WINSOCKET" When defined to \f(CW1\fR, the select backend will assume that select/socket/connect etc. don't understand file descriptors but wants osf handles on win32 (this is the case when the select to be used is the winsock select). This means that it will call \&\f(CW\*(C`_get_osfhandle\*(C'\fR on the fd to convert it to an \s-1OS\s0 handle. Otherwise, it is assumed that all these functions actually work on fds, even on win32. Should not be defined on non\-win32 platforms. .IP "\s-1EV_FD_TO_WIN32_HANDLE\s0" 4 .IX Item "EV_FD_TO_WIN32_HANDLE" If \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR is enabled, then libev needs a way to map file descriptors to socket handles. When not defining this symbol (the default), then libev will call \f(CW\*(C`_get_osfhandle\*(C'\fR, which is usually correct. In some cases, programs use their own file descriptor management, in which case they can provide this function to map fds to socket handles. .IP "\s-1EV_USE_POLL\s0" 4 .IX Item "EV_USE_POLL" If defined to be \f(CW1\fR, libev will compile in support for the \f(CW\*(C`poll\*(C'\fR(2) backend. Otherwise it will be enabled on non\-win32 platforms. It takes precedence over select. .IP "\s-1EV_USE_EPOLL\s0" 4 .IX Item "EV_USE_EPOLL" If defined to be \f(CW1\fR, libev will compile in support for the Linux \&\f(CW\*(C`epoll\*(C'\fR(7) backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for GNU/Linux systems. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_USE_KQUEUE\s0" 4 .IX Item "EV_USE_KQUEUE" If defined to be \f(CW1\fR, libev will compile in support for the \s-1BSD\s0 style \&\f(CW\*(C`kqueue\*(C'\fR(2) backend. Its actual availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for \s-1BSD\s0 and BSD-like systems, although on most BSDs kqueue only supports some types of fds correctly (the only platform we found that supports ptys for example was NetBSD), so kqueue might be compiled in, but not be used unless explicitly requested. The best way to use it is to find out whether kqueue supports your type of fd properly and use an embedded kqueue loop. .IP "\s-1EV_USE_PORT\s0" 4 .IX Item "EV_USE_PORT" If defined to be \f(CW1\fR, libev will compile in support for the Solaris 10 port style backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for Solaris 10 systems. .IP "\s-1EV_USE_DEVPOLL\s0" 4 .IX Item "EV_USE_DEVPOLL" reserved for future expansion, works like the \s-1USE\s0 symbols above. .IP "\s-1EV_USE_INOTIFY\s0" 4 .IX Item "EV_USE_INOTIFY" If defined to be \f(CW1\fR, libev will compile in support for the Linux inotify interface to speed up \f(CW\*(C`ev_stat\*(C'\fR watchers. Its actual availability will be detected at runtime. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_ATOMIC_T\s0" 4 .IX Item "EV_ATOMIC_T" Libev requires an integer type (suitable for storing \f(CW0\fR or \f(CW1\fR) whose access is atomic with respect to other threads or signal contexts. No such type is easily found in the C language, so you can provide your own type that you know is safe for your purposes. It is used both for signal handler \*(L"locking\*(R" as well as for signal and thread safety in \f(CW\*(C`ev_async\*(C'\fR watchers. .Sp In the absense of this define, libev will use \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (from \fIsignal.h\fR), which is usually good enough on most platforms. .IP "\s-1EV_H\s0" 4 .IX Item "EV_H" The name of the \fIev.h\fR header file used to include it. The default if undefined is \f(CW"ev.h"\fR in \fIevent.h\fR, \fIev.c\fR and \fIev++.h\fR. This can be used to virtually rename the \fIev.h\fR header file in case of conflicts. .IP "\s-1EV_CONFIG_H\s0" 4 .IX Item "EV_CONFIG_H" If \f(CW\*(C`EV_STANDALONE\*(C'\fR isn't \f(CW1\fR, this variable can be used to override \&\fIev.c\fR's idea of where to find the \fIconfig.h\fR file, similarly to \&\f(CW\*(C`EV_H\*(C'\fR, above. .IP "\s-1EV_EVENT_H\s0" 4 .IX Item "EV_EVENT_H" Similarly to \f(CW\*(C`EV_H\*(C'\fR, this macro can be used to override \fIevent.c\fR's idea of how the \fIevent.h\fR header can be found, the default is \f(CW"event.h"\fR. .IP "\s-1EV_PROTOTYPES\s0" 4 .IX Item "EV_PROTOTYPES" If defined to be \f(CW0\fR, then \fIev.h\fR will not define any function prototypes, but still define all the structs and other symbols. This is occasionally useful if you want to provide your own wrapper functions around libev functions. .IP "\s-1EV_MULTIPLICITY\s0" 4 .IX Item "EV_MULTIPLICITY" If undefined or defined to \f(CW1\fR, then all event-loop-specific functions will have the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument, and you can create additional independent event loops. Otherwise there will be no support for multiple event loops and there is no first event loop pointer argument. Instead, all functions act on the single default loop. .IP "\s-1EV_MINPRI\s0" 4 .IX Item "EV_MINPRI" .PD 0 .IP "\s-1EV_MAXPRI\s0" 4 .IX Item "EV_MAXPRI" .PD The range of allowed priorities. \f(CW\*(C`EV_MINPRI\*(C'\fR must be smaller or equal to \&\f(CW\*(C`EV_MAXPRI\*(C'\fR, but otherwise there are no non-obvious limitations. You can provide for more priorities by overriding those symbols (usually defined to be \f(CW\*(C`\-2\*(C'\fR and \f(CW2\fR, respectively). .Sp When doing priority-based operations, libev usually has to linearly search all the priorities, so having many of them (hundreds) uses a lot of space and time, so using the defaults of five priorities (\-2 .. +2) is usually fine. .Sp If your embedding app does not need any priorities, defining these both to \&\f(CW0\fR will save some memory and cpu. .IP "\s-1EV_PERIODIC_ENABLE\s0" 4 .IX Item "EV_PERIODIC_ENABLE" If undefined or defined to be \f(CW1\fR, then periodic timers are supported. If defined to be \f(CW0\fR, then they are not. Disabling them saves a few kB of code. .IP "\s-1EV_IDLE_ENABLE\s0" 4 .IX Item "EV_IDLE_ENABLE" If undefined or defined to be \f(CW1\fR, then idle watchers are supported. If defined to be \f(CW0\fR, then they are not. Disabling them saves a few kB of code. .IP "\s-1EV_EMBED_ENABLE\s0" 4 .IX Item "EV_EMBED_ENABLE" If undefined or defined to be \f(CW1\fR, then embed watchers are supported. If defined to be \f(CW0\fR, then they are not. .IP "\s-1EV_STAT_ENABLE\s0" 4 .IX Item "EV_STAT_ENABLE" If undefined or defined to be \f(CW1\fR, then stat watchers are supported. If defined to be \f(CW0\fR, then they are not. .IP "\s-1EV_FORK_ENABLE\s0" 4 .IX Item "EV_FORK_ENABLE" If undefined or defined to be \f(CW1\fR, then fork watchers are supported. If defined to be \f(CW0\fR, then they are not. .IP "\s-1EV_ASYNC_ENABLE\s0" 4 .IX Item "EV_ASYNC_ENABLE" If undefined or defined to be \f(CW1\fR, then async watchers are supported. If defined to be \f(CW0\fR, then they are not. .IP "\s-1EV_MINIMAL\s0" 4 .IX Item "EV_MINIMAL" If you need to shave off some kilobytes of code at the expense of some speed, define this symbol to \f(CW1\fR. Currently this is used to override some inlining decisions, saves roughly 30% codesize of amd64. It also selects a much smaller 2\-heap for timer management over the default 4\-heap. .IP "\s-1EV_PID_HASHSIZE\s0" 4 .IX Item "EV_PID_HASHSIZE" \&\f(CW\*(C`ev_child\*(C'\fR watchers use a small hash table to distribute workload by pid. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_MINIMAL\*(C'\fR), usually more than enough. If you need to manage thousands of children you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_INOTIFY_HASHSIZE\s0" 4 .IX Item "EV_INOTIFY_HASHSIZE" \&\f(CW\*(C`ev_stat\*(C'\fR watchers use a small hash table to distribute workload by inotify watch id. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_MINIMAL\*(C'\fR), usually more than enough. If you need to manage thousands of \f(CW\*(C`ev_stat\*(C'\fR watchers you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_USE_4HEAP\s0" 4 .IX Item "EV_USE_4HEAP" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heap, libev uses a 4\-heap when this symbol is defined to \f(CW1\fR. The 4\-heap uses more complicated (longer) code but has a noticable after performance with many (thousands) of watchers. .Sp The default is \f(CW1\fR unless \f(CW\*(C`EV_MINIMAL\*(C'\fR is set in which case it is \f(CW0\fR (disabled). .IP "\s-1EV_HEAP_CACHE_AT\s0" 4 .IX Item "EV_HEAP_CACHE_AT" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heap, libev can cache the timestamp (\fIat\fR) within the heap structure (selected by defining \f(CW\*(C`EV_HEAP_CACHE_AT\*(C'\fR to \f(CW1\fR), which uses 8\-12 bytes more per watcher and a few hundred bytes more code, but avoids random read accesses on heap changes. This noticably improves performance noticably with with many (hundreds) of watchers. .Sp The default is \f(CW1\fR unless \f(CW\*(C`EV_MINIMAL\*(C'\fR is set in which case it is \f(CW0\fR (disabled). .IP "\s-1EV_COMMON\s0" 4 .IX Item "EV_COMMON" By default, all watchers have a \f(CW\*(C`void *data\*(C'\fR member. By redefining this macro to a something else you can include more and other types of members. You have to define it each time you include one of the files, though, and it must be identical each time. .Sp For example, the perl \s-1EV\s0 module uses something like this: .Sp .Vb 3 \& #define EV_COMMON \e \& SV *self; /* contains this struct */ \e \& SV *cb_sv, *fh /* note no trailing ";" */ .Ve .IP "\s-1EV_CB_DECLARE\s0 (type)" 4 .IX Item "EV_CB_DECLARE (type)" .PD 0 .IP "\s-1EV_CB_INVOKE\s0 (watcher, revents)" 4 .IX Item "EV_CB_INVOKE (watcher, revents)" .IP "ev_set_cb (ev, cb)" 4 .IX Item "ev_set_cb (ev, cb)" .PD Can be used to change the callback member declaration in each watcher, and the way callbacks are invoked and set. Must expand to a struct member definition and a statement, respectively. See the \fIev.h\fR header file for their default definitions. One possible use for overriding these is to avoid the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument in all cases, or to use method calls instead of plain function calls in \*(C+. .Sh "\s-1EXPORTED\s0 \s-1API\s0 \s-1SYMBOLS\s0" .IX Subsection "EXPORTED API SYMBOLS" If you need to re-export the \s-1API\s0 (e.g. via a dll) and you need a list of exported symbols, you can use the provided \fISymbol.*\fR files which list all public symbols, one per line: .PP .Vb 2 \& Symbols.ev for libev proper \& Symbols.event for the libevent emulation .Ve .PP This can also be used to rename all public symbols to avoid clashes with multiple versions of libev linked together (which is obviously bad in itself, but sometimes it is inconvinient to avoid this). .PP A sed command like this will create wrapper \f(CW\*(C`#define\*(C'\fR's that you need to include before including \fIev.h\fR: .PP .Vb 1 \& wrap.h .Ve .PP This would create a file \fIwrap.h\fR which essentially looks like this: .PP .Vb 4 \& #define ev_backend myprefix_ev_backend \& #define ev_check_start myprefix_ev_check_start \& #define ev_check_stop myprefix_ev_check_stop \& ... .Ve .Sh "\s-1EXAMPLES\s0" .IX Subsection "EXAMPLES" For a real-world example of a program the includes libev verbatim, you can have a look at the \s-1EV\s0 perl module (). It has the libev files in the \fIlibev/\fR subdirectory and includes them in the \fI\s-1EV/EVAPI\s0.h\fR (public interface) and \fI\s-1EV\s0.xs\fR (implementation) files. Only the \fI\s-1EV\s0.xs\fR file will be compiled. It is pretty complex because it provides its own header file. .PP The usage in rxvt-unicode is simpler. It has a \fIev_cpp.h\fR header file that everybody includes and which overrides some configure choices: .PP .Vb 9 \& #define EV_MINIMAL 1 \& #define EV_USE_POLL 0 \& #define EV_MULTIPLICITY 0 \& #define EV_PERIODIC_ENABLE 0 \& #define EV_STAT_ENABLE 0 \& #define EV_FORK_ENABLE 0 \& #define EV_CONFIG_H \& #define EV_MINPRI 0 \& #define EV_MAXPRI 0 \& \& #include "ev++.h" .Ve .PP And a \fIev_cpp.C\fR implementation file that contains libev proper and is compiled: .PP .Vb 2 \& #include "ev_cpp.h" \& #include "ev.c" .Ve .SH "THREADS AND COROUTINES" .IX Header "THREADS AND COROUTINES" .Sh "\s-1THREADS\s0" .IX Subsection "THREADS" Libev itself is completely threadsafe, but it uses no locking. This means that you can use as many loops as you want in parallel, as long as only one thread ever calls into one libev function with the same loop parameter. .PP Or put differently: calls with different loop parameters can be done in parallel from multiple threads, calls with the same loop parameter must be done serially (but can be done from different threads, as long as only one thread ever is inside a call at any point in time, e.g. by using a mutex per loop). .PP If you want to know which design is best for your problem, then I cannot help you but by giving some generic advice: .IP "\(bu" 4 most applications have a main thread: use the default libev loop in that thread, or create a seperate thread running only the default loop. .Sp This helps integrating other libraries or software modules that use libev themselves and don't care/know about threading. .IP "\(bu" 4 one loop per thread is usually a good model. .Sp Doing this is almost never wrong, sometimes a better-performance model exists, but it is always a good start. .IP "\(bu" 4 other models exist, such as the leader/follower pattern, where one loop is handed through multiple threads in a kind of round-robbin fashion. .Sp Chosing a model is hard \- look around, learn, know that usually you cna do better than you currently do :\-) .IP "\(bu" 4 often you need to talk to some other thread which blocks in the event loop \- \f(CW\*(C`ev_async\*(C'\fR watchers can be used to wake them up from other threads safely (or from signal contexts...). .Sh "\s-1COROUTINES\s0" .IX Subsection "COROUTINES" Libev is much more accomodating to coroutines (\*(L"cooperative threads\*(R"): libev fully supports nesting calls to it's functions from different coroutines (e.g. you can call \f(CW\*(C`ev_loop\*(C'\fR on the same loop from two different coroutines and switch freely between both coroutines running the loop, as long as you don't confuse yourself). The only exception is that you must not do this from \f(CW\*(C`ev_periodic\*(C'\fR reschedule callbacks. .PP Care has been invested into making sure that libev does not keep local state inside \f(CW\*(C`ev_loop\*(C'\fR, and other calls do not usually allow coroutine switches. .SH "COMPLEXITIES" .IX Header "COMPLEXITIES" In this section the complexities of (many of) the algorithms used inside libev will be explained. For complexity discussions about backends see the documentation for \f(CW\*(C`ev_default_init\*(C'\fR. .PP All of the following are about amortised time: If an array needs to be extended, libev needs to realloc and move the whole array, but this happens asymptotically never with higher number of elements, so O(1) might mean it might do a lengthy realloc operation in rare cases, but on average it is much faster and asymptotically approaches constant time. .IP "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" 4 .IX Item "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" This means that, when you have a watcher that triggers in one hour and there are 100 watchers that would trigger before that then inserting will have to skip roughly seven (\f(CW\*(C`ld 100\*(C'\fR) of these watchers. .IP "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" 4 .IX Item "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" That means that changing a timer costs less than removing/adding them as only the relative motion in the event queue has to be paid for. .IP "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" 4 .IX Item "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" These just add the watcher into an array or at the head of a list. .IP "Stopping check/prepare/idle/fork/async watchers: O(1)" 4 .IX Item "Stopping check/prepare/idle/fork/async watchers: O(1)" .PD 0 .IP "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % \s-1EV_PID_HASHSIZE\s0))" 4 .IX Item "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % EV_PID_HASHSIZE))" .PD These watchers are stored in lists then need to be walked to find the correct watcher to remove. The lists are usually short (you don't usually have many watchers waiting for the same fd or signal). .IP "Finding the next timer in each loop iteration: O(1)" 4 .IX Item "Finding the next timer in each loop iteration: O(1)" By virtue of using a binary or 4\-heap, the next timer is always found at a fixed position in the storage array. .IP "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" 4 .IX Item "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" A change means an I/O watcher gets started or stopped, which requires libev to recalculate its status (and possibly tell the kernel, depending on backend and wether \f(CW\*(C`ev_io_set\*(C'\fR was used). .IP "Activating one watcher (putting it into the pending state): O(1)" 4 .IX Item "Activating one watcher (putting it into the pending state): O(1)" .PD 0 .IP "Priority handling: O(number_of_priorities)" 4 .IX Item "Priority handling: O(number_of_priorities)" .PD Priorities are implemented by allocating some space for each priority. When doing priority-based operations, libev usually has to linearly search all the priorities, but starting/stopping and activating watchers becomes O(1) w.r.t. priority handling. .IP "Sending an ev_async: O(1)" 4 .IX Item "Sending an ev_async: O(1)" .PD 0 .IP "Processing ev_async_send: O(number_of_async_watchers)" 4 .IX Item "Processing ev_async_send: O(number_of_async_watchers)" .IP "Processing signals: O(max_signal_number)" 4 .IX Item "Processing signals: O(max_signal_number)" .PD Sending involves a syscall \fIiff\fR there were no other \f(CW\*(C`ev_async_send\*(C'\fR calls in the current loop iteration. Checking for async and signal events involves iterating over all running async watchers or all signal numbers. .SH "Win32 platform limitations and workarounds" .IX Header "Win32 platform limitations and workarounds" Win32 doesn't support any of the standards (e.g. \s-1POSIX\s0) that libev requires, and its I/O model is fundamentally incompatible with the \s-1POSIX\s0 model. Libev still offers limited functionality on this platform in the form of the \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR backend, and only supports socket descriptors. This only applies when using Win32 natively, not when using e.g. cygwin. .PP Lifting these limitations would basically require the full re-implementation of the I/O system. If you are into these kinds of things, then note that glib does exactly that for you in a very portable way (note also that glib is the slowest event library known to man). .PP There is no supported compilation method available on windows except embedding it into other applications. .PP Due to the many, low, and arbitrary limits on the win32 platform and the abysmal performance of winsockets, using a large number of sockets is not recommended (and not reasonable). If your program needs to use more than a hundred or so sockets, then likely it needs to use a totally different implementation for windows, as libev offers the \s-1POSIX\s0 readyness notification model, which cannot be implemented efficiently on windows (microsoft monopoly games). .IP "The winsocket select function" 4 .IX Item "The winsocket select function" The winsocket \f(CW\*(C`select\*(C'\fR function doesn't follow \s-1POSIX\s0 in that it requires socket \fIhandles\fR and not socket \fIfile descriptors\fR. This makes select very inefficient, and also requires a mapping from file descriptors to socket handles. See the discussion of the \f(CW\*(C`EV_SELECT_USE_FD_SET\*(C'\fR, \&\f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR and \f(CW\*(C`EV_FD_TO_WIN32_HANDLE\*(C'\fR preprocessor symbols for more info. .Sp The configuration for a \*(L"naked\*(R" win32 using the microsoft runtime libraries and raw winsocket select is: .Sp .Vb 2 \& #define EV_USE_SELECT 1 \& #define EV_SELECT_IS_WINSOCKET 1 /* forces EV_SELECT_USE_FD_SET, too */ .Ve .Sp Note that winsockets handling of fd sets is O(n), so you can easily get a complexity in the O(nA\*^X) range when using win32. .IP "Limited number of file descriptors" 4 .IX Item "Limited number of file descriptors" Windows has numerous arbitrary (and low) limits on things. .Sp Early versions of winsocket's select only supported waiting for a maximum of \f(CW64\fR handles (probably owning to the fact that all windows kernels can only wait for \f(CW64\fR things at the same time internally; microsoft recommends spawning a chain of threads and wait for 63 handles and the previous thread in each. Great). .Sp Newer versions support more handles, but you need to define \f(CW\*(C`FD_SETSIZE\*(C'\fR to some high number (e.g. \f(CW2048\fR) before compiling the winsocket select call (which might be in libev or elsewhere, for example, perl does its own select emulation on windows). .Sp Another limit is the number of file descriptors in the microsoft runtime libraries, which by default is \f(CW64\fR (there must be a hidden \fI64\fR fetish or something like this inside microsoft). You can increase this by calling \&\f(CW\*(C`_setmaxstdio\*(C'\fR, which can increase this limit to \f(CW2048\fR (another arbitrary limit), but is broken in many versions of the microsoft runtime libraries. .Sp This might get you to about \f(CW512\fR or \f(CW2048\fR sockets (depending on windows version and/or the phase of the moon). To get more, you need to wrap all I/O functions and provide your own fd management, but the cost of calling select (O(nA\*^X)) will likely make this unworkable. .SH "PORTABILITY REQUIREMENTS" .IX Header "PORTABILITY REQUIREMENTS" In addition to a working ISO-C implementation, libev relies on a few additional extensions: .ie n .IP """sig_atomic_t volatile"" must be thread-atomic as well" 4 .el .IP "\f(CWsig_atomic_t volatile\fR must be thread-atomic as well" 4 .IX Item "sig_atomic_t volatile must be thread-atomic as well" The type \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (or whatever is defined as \&\f(CW\*(C`EV_ATOMIC_T\*(C'\fR) must be atomic w.r.t. accesses from different threads. This is not part of the specification for \f(CW\*(C`sig_atomic_t\*(C'\fR, but is believed to be sufficiently portable. .ie n .IP """sigprocmask"" must work in a threaded environment" 4 .el .IP "\f(CWsigprocmask\fR must work in a threaded environment" 4 .IX Item "sigprocmask must work in a threaded environment" Libev uses \f(CW\*(C`sigprocmask\*(C'\fR to temporarily block signals. This is not allowed in a threaded program (\f(CW\*(C`pthread_sigmask\*(C'\fR has to be used). Typical pthread implementations will either allow \f(CW\*(C`sigprocmask\*(C'\fR in the \*(L"main thread\*(R" or will block signals process-wide, both behaviours would be compatible with libev. Interaction between \f(CW\*(C`sigprocmask\*(C'\fR and \&\f(CW\*(C`pthread_sigmask\*(C'\fR could complicate things, however. .Sp The most portable way to handle signals is to block signals in all threads except the initial one, and run the default loop in the initial thread as well. .ie n .IP """long"" must be large enough for common memory allocation sizes" 4 .el .IP "\f(CWlong\fR must be large enough for common memory allocation sizes" 4 .IX Item "long must be large enough for common memory allocation sizes" To improve portability and simplify using libev, libev uses \f(CW\*(C`long\*(C'\fR internally instead of \f(CW\*(C`size_t\*(C'\fR when allocating its data structures. On non-POSIX systems (Microsoft...) this might be unexpectedly low, but is still at least 31 bits everywhere, which is enough for hundreds of millions of watchers. .ie n .IP """double"" must hold a time value in seconds with enough accuracy" 4 .el .IP "\f(CWdouble\fR must hold a time value in seconds with enough accuracy" 4 .IX Item "double must hold a time value in seconds with enough accuracy" The type \f(CW\*(C`double\*(C'\fR is used to represent timestamps. It is required to have at least 51 bits of mantissa (and 9 bits of exponent), which is good enough for at least into the year 4000. This requirement is fulfilled by implementations implementing \s-1IEEE\s0 754 (basically all existing ones). .PP If you know of other additional requirements drop me a note. .SH "AUTHOR" .IX Header "AUTHOR" Marc Lehmann . .SH "POD ERRORS" .IX Header "POD ERRORS" Hey! \fBThe above document had some coding errors, which are explained below:\fR .IP "Around line 3052:" 4 .IX Item "Around line 3052:" You forgot a '=back' before '=head2' tarantool_1.6.7.588.g76bbd9c/third_party/libeio/Makefile.am0000664000000000000000000000043512634006617022002 0ustar rootrootAUTOMAKE_OPTIONS = foreign no-dependencies VERSION_INFO = 1:0 EXTRA_DIST = LICENSE Changes autogen.sh etp.c #man_MANS = ev.3 include_HEADERS = eio.h lib_LTLIBRARIES = libeio.la libeio_la_SOURCES = eio.c ecb.h xthread.h config.h libeio_la_LDFLAGS = -version-info $(VERSION_INFO) tarantool_1.6.7.588.g76bbd9c/third_party/libeio/demo.c0000664000000000000000000001141712634006617021040 0ustar rootroot#include #include #include #include #include #include #include #include #include #include "eio.h" int respipe [2]; void want_poll (void) { char dummy; printf ("want_poll ()\n"); write (respipe [1], &dummy, 1); } void done_poll (void) { char dummy; printf ("done_poll ()\n"); read (respipe [0], &dummy, 1); } void event_loop (void) { // an event loop. yeah. struct pollfd pfd; pfd.fd = respipe [0]; pfd.events = POLLIN; printf ("\nentering event loop\n"); while (eio_nreqs ()) { poll (&pfd, 1, -1); printf ("eio_poll () = %d\n", eio_poll ()); } printf ("leaving event loop\n"); } int res_cb (eio_req *req) { printf ("res_cb(%d|%s) = %d\n", req->type, req->data ? req->data : "?", EIO_RESULT (req)); if (req->result < 0) abort (); return 0; } int readdir_cb (eio_req *req) { char *buf = (char *)EIO_BUF (req); printf ("readdir_cb = %d\n", EIO_RESULT (req)); if (EIO_RESULT (req) < 0) return 0; while (EIO_RESULT (req)--) { printf ("readdir = <%s>\n", buf); buf += strlen (buf) + 1; } return 0; } int stat_cb (eio_req *req) { struct stat *buf = EIO_STAT_BUF (req); if (req->type == EIO_FSTAT) printf ("fstat_cb = %d\n", EIO_RESULT (req)); else printf ("stat_cb(%s) = %d\n", EIO_PATH (req), EIO_RESULT (req)); if (!EIO_RESULT (req)) printf ("stat size %d perm 0%o\n", buf->st_size, buf->st_mode & 0777); return 0; } int read_cb (eio_req *req) { unsigned char *buf = (unsigned char *)EIO_BUF (req); printf ("read_cb = %d (%02x%02x%02x%02x %02x%02x%02x%02x)\n", EIO_RESULT (req), buf [0], buf [1], buf [2], buf [3], buf [4], buf [5], buf [6], buf [7]); return 0; } int last_fd; int open_cb (eio_req *req) { printf ("open_cb = %d\n", EIO_RESULT (req)); last_fd = EIO_RESULT (req); return 0; } int main (void) { printf ("pipe ()\n"); if (pipe (respipe)) abort (); printf ("eio_init ()\n"); if (eio_init (want_poll, done_poll)) abort (); do { /* avoid relative paths yourself(!) */ eio_mkdir ("eio-test-dir", 0777, 0, res_cb, "mkdir"); eio_nop (0, res_cb, "nop"); event_loop (); eio_stat ("eio-test-dir", 0, stat_cb, "stat"); eio_lstat ("eio-test-dir", 0, stat_cb, "stat"); eio_open ("eio-test-dir/eio-test-file", O_RDWR | O_CREAT, 0777, 0, open_cb, "open"); eio_symlink ("test", "eio-test-dir/eio-symlink", 0, res_cb, "symlink"); eio_mknod ("eio-test-dir/eio-fifo", S_IFIFO, 0, 0, res_cb, "mknod"); event_loop (); eio_utime ("eio-test-dir", 12345.678, 23456.789, 0, res_cb, "utime"); eio_futime (last_fd, 92345.678, 93456.789, 0, res_cb, "futime"); eio_chown ("eio-test-dir", getuid (), getgid (), 0, res_cb, "chown"); eio_fchown (last_fd, getuid (), getgid (), 0, res_cb, "fchown"); eio_fchmod (last_fd, 0723, 0, res_cb, "fchmod"); eio_readdir ("eio-test-dir", 0, 0, readdir_cb, "readdir"); eio_readdir ("/nonexistant", 0, 0, readdir_cb, "readdir"); eio_fstat (last_fd, 0, stat_cb, "stat"); eio_write (last_fd, "test\nfail\n", 10, 4, 0, res_cb, "write"); event_loop (); eio_read (last_fd, 0, 8, 0, EIO_PRI_DEFAULT, read_cb, "read"); eio_readlink ("eio-test-dir/eio-symlink", 0, res_cb, "readlink"); event_loop (); eio_dup2 (1, 2, EIO_PRI_DEFAULT, res_cb, "dup"); // dup stdout to stderr eio_chmod ("eio-test-dir", 0765, 0, res_cb, "chmod"); eio_ftruncate (last_fd, 9, 0, res_cb, "ftruncate"); eio_fdatasync (last_fd, 0, res_cb, "fdatasync"); eio_fsync (last_fd, 0, res_cb, "fsync"); eio_sync (0, res_cb, "sync"); eio_busy (0.5, 0, res_cb, "busy"); event_loop (); eio_sendfile (1, last_fd, 4, 5, 0, res_cb, "sendfile"); // write "test\n" to stdout eio_fstat (last_fd, 0, stat_cb, "stat"); event_loop (); eio_truncate ("eio-test-dir/eio-test-file", 6, 0, res_cb, "truncate"); eio_readahead (last_fd, 0, 64, 0, res_cb, "readahead"); event_loop (); eio_close (last_fd, 0, res_cb, "close"); eio_link ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-2", 0, res_cb, "link"); event_loop (); eio_rename ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-renamed", 0, res_cb, "rename"); event_loop (); eio_unlink ("eio-test-dir/eio-fifo", 0, res_cb, "unlink"); eio_unlink ("eio-test-dir/eio-symlink", 0, res_cb, "unlink"); eio_unlink ("eio-test-dir/eio-test-file-2", 0, res_cb, "unlink"); eio_unlink ("eio-test-dir/eio-test-file-renamed", 0, res_cb, "unlink"); event_loop (); eio_rmdir ("eio-test-dir", 0, res_cb, "rmdir"); event_loop (); } while (0); return 0; } tarantool_1.6.7.588.g76bbd9c/third_party/libeio/aclocal.m40000664000000000000000000124265512634006617021623 0ustar rootroot# generated automatically by aclocal 1.12 -*- Autoconf -*- # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, # 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, # Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. m4_ifndef([AC_AUTOCONF_VERSION], [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, [m4_warning([this file was generated for autoconf 2.69. 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#endif int fnord () { return 42; } int main () { void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); int status = $lt_dlunknown; if (self) { if (dlsym (self,"fnord")) status = $lt_dlno_uscore; else { if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; else puts (dlerror ()); } /* dlclose (self); */ } else puts (dlerror ()); return status; }] _LT_EOF if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} 2>/dev/null; then (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null lt_status=$? case x$lt_status in x$lt_dlno_uscore) $1 ;; x$lt_dlneed_uscore) $2 ;; x$lt_dlunknown|x*) $3 ;; esac else : # compilation failed $3 fi fi rm -fr conftest* ])# _LT_TRY_DLOPEN_SELF # LT_SYS_DLOPEN_SELF # ------------------ AC_DEFUN([LT_SYS_DLOPEN_SELF], [m4_require([_LT_HEADER_DLFCN])dnl if test "x$enable_dlopen" != xyes; then enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown else lt_cv_dlopen=no lt_cv_dlopen_libs= case $host_os in beos*) lt_cv_dlopen="load_add_on" lt_cv_dlopen_libs= lt_cv_dlopen_self=yes ;; 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esac # HP-UX runs *really* slowly unless shared libraries are mode 555, ... postinstall_cmds='chmod 555 $lib' # or fails outright, so override atomically: install_override_mode=555 ;; interix[[3-9]]*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes ;; irix5* | irix6* | nonstopux*) case $host_os in nonstopux*) version_type=nonstopux ;; *) if test "$lt_cv_prog_gnu_ld" = yes; then version_type=linux # correct to gnu/linux during the next big refactor else version_type=irix fi ;; esac need_lib_prefix=no need_version=no soname_spec='${libname}${release}${shared_ext}$major' library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext} $libname${shared_ext}' case $host_os in irix5* | nonstopux*) libsuff= shlibsuff= ;; *) case $LD in # libtool.m4 will add one of these switches to LD *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ") libsuff= shlibsuff= libmagic=32-bit;; *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ") libsuff=32 shlibsuff=N32 libmagic=N32;; *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ") libsuff=64 shlibsuff=64 libmagic=64-bit;; *) libsuff= shlibsuff= libmagic=never-match;; esac ;; esac shlibpath_var=LD_LIBRARY${shlibsuff}_PATH shlibpath_overrides_runpath=no sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}" sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}" hardcode_into_libs=yes ;; # No shared lib support for Linux oldld, aout, or coff. linux*oldld* | linux*aout* | linux*coff*) dynamic_linker=no ;; # This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no # Some binutils ld are patched to set DT_RUNPATH AC_CACHE_VAL([lt_cv_shlibpath_overrides_runpath], [lt_cv_shlibpath_overrides_runpath=no save_LDFLAGS=$LDFLAGS save_libdir=$libdir eval "libdir=/foo; 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sunos4*) version_type=sunos library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix' finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes if test "$with_gnu_ld" = yes; then need_lib_prefix=no fi need_version=yes ;; sysv4 | sysv4.3*) version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' shlibpath_var=LD_LIBRARY_PATH case $host_vendor in sni) shlibpath_overrides_runpath=no need_lib_prefix=no runpath_var=LD_RUN_PATH ;; siemens) need_lib_prefix=no ;; motorola) need_lib_prefix=no need_version=no shlibpath_overrides_runpath=no sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib' ;; esac ;; sysv4*MP*) if test -d /usr/nec ;then version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='$libname${shared_ext}.$versuffix $libname${shared_ext}.$major $libname${shared_ext}' soname_spec='$libname${shared_ext}.$major' shlibpath_var=LD_LIBRARY_PATH fi ;; 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hppa*64*) [lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]'] lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl ;; *) lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|PA-RISC[[0-9]]\.[[0-9]]) shared library' lt_cv_file_magic_test_file=/usr/lib/libc.sl ;; esac ;; interix[[3-9]]*) # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|\.a)$' ;; irix5* | irix6* | nonstopux*) case $LD in *-32|*"-32 ") libmagic=32-bit;; *-n32|*"-n32 ") libmagic=N32;; *-64|*"-64 ") libmagic=64-bit;; *) libmagic=never-match;; esac lt_cv_deplibs_check_method=pass_all ;; # This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu) lt_cv_deplibs_check_method=pass_all ;; netbsd*) if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|_pic\.a)$' fi ;; newos6*) lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (executable|dynamic lib)' lt_cv_file_magic_cmd=/usr/bin/file lt_cv_file_magic_test_file=/usr/lib/libnls.so ;; *nto* | *qnx*) lt_cv_deplibs_check_method=pass_all ;; openbsd*) if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|\.so|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$' fi ;; osf3* | osf4* | osf5*) lt_cv_deplibs_check_method=pass_all ;; rdos*) lt_cv_deplibs_check_method=pass_all ;; solaris*) lt_cv_deplibs_check_method=pass_all ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) lt_cv_deplibs_check_method=pass_all ;; sysv4 | sysv4.3*) case $host_vendor in motorola) lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib) M[[0-9]][[0-9]]* Version [[0-9]]' lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*` ;; ncr) lt_cv_deplibs_check_method=pass_all ;; sequent) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB (shared object|dynamic lib )' ;; sni) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method="file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB dynamic lib" lt_cv_file_magic_test_file=/lib/libc.so ;; siemens) lt_cv_deplibs_check_method=pass_all ;; pc) lt_cv_deplibs_check_method=pass_all ;; esac ;; tpf*) lt_cv_deplibs_check_method=pass_all ;; esac ]) file_magic_glob= want_nocaseglob=no if test "$build" = "$host"; then case $host_os in mingw* | pw32*) if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then want_nocaseglob=yes else file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[[\1]]\/[[\1]]\/g;/g"` fi ;; esac fi file_magic_cmd=$lt_cv_file_magic_cmd deplibs_check_method=$lt_cv_deplibs_check_method test -z "$deplibs_check_method" && deplibs_check_method=unknown _LT_DECL([], [deplibs_check_method], [1], [Method to check whether dependent libraries are shared objects]) _LT_DECL([], [file_magic_cmd], [1], [Command to use when deplibs_check_method = "file_magic"]) _LT_DECL([], [file_magic_glob], [1], [How to find potential files when deplibs_check_method = "file_magic"]) _LT_DECL([], [want_nocaseglob], [1], [Find potential files using nocaseglob when deplibs_check_method = "file_magic"]) ])# _LT_CHECK_MAGIC_METHOD # LT_PATH_NM # ---------- # find the pathname to a BSD- or MS-compatible name lister AC_DEFUN([LT_PATH_NM], [AC_REQUIRE([AC_PROG_CC])dnl AC_CACHE_CHECK([for BSD- or MS-compatible name lister (nm)], lt_cv_path_NM, [if test -n "$NM"; then # Let the user override the test. lt_cv_path_NM="$NM" else lt_nm_to_check="${ac_tool_prefix}nm" if test -n "$ac_tool_prefix" && test "$build" = "$host"; then lt_nm_to_check="$lt_nm_to_check nm" fi for lt_tmp_nm in $lt_nm_to_check; do lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do IFS="$lt_save_ifs" test -z "$ac_dir" && ac_dir=. tmp_nm="$ac_dir/$lt_tmp_nm" if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext" ; then # Check to see if the nm accepts a BSD-compat flag. # Adding the `sed 1q' prevents false positives on HP-UX, which says: # nm: unknown option "B" ignored # Tru64's nm complains that /dev/null is an invalid object file case `"$tmp_nm" -B /dev/null 2>&1 | sed '1q'` in */dev/null* | *'Invalid file or object type'*) lt_cv_path_NM="$tmp_nm -B" break ;; *) case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in */dev/null*) lt_cv_path_NM="$tmp_nm -p" break ;; *) lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but continue # so that we can try to find one that supports BSD flags ;; esac ;; esac fi done IFS="$lt_save_ifs" done : ${lt_cv_path_NM=no} fi]) if test "$lt_cv_path_NM" != "no"; then NM="$lt_cv_path_NM" else # Didn't find any BSD compatible name lister, look for dumpbin. if test -n "$DUMPBIN"; then : # Let the user override the test. else AC_CHECK_TOOLS(DUMPBIN, [dumpbin "link -dump"], :) case `$DUMPBIN -symbols /dev/null 2>&1 | sed '1q'` in *COFF*) DUMPBIN="$DUMPBIN -symbols" ;; *) DUMPBIN=: ;; esac fi AC_SUBST([DUMPBIN]) if test "$DUMPBIN" != ":"; then NM="$DUMPBIN" fi fi test -z "$NM" && NM=nm AC_SUBST([NM]) _LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface], [lt_cv_nm_interface="BSD nm" echo "int some_variable = 0;" > conftest.$ac_ext (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&AS_MESSAGE_LOG_FD) (eval "$ac_compile" 2>conftest.err) cat conftest.err >&AS_MESSAGE_LOG_FD (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD) (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) cat conftest.err >&AS_MESSAGE_LOG_FD (eval echo "\"\$as_me:$LINENO: output\"" >&AS_MESSAGE_LOG_FD) cat conftest.out >&AS_MESSAGE_LOG_FD if $GREP 'External.*some_variable' conftest.out > /dev/null; then lt_cv_nm_interface="MS dumpbin" fi rm -f conftest*]) ])# LT_PATH_NM # Old names: AU_ALIAS([AM_PROG_NM], [LT_PATH_NM]) AU_ALIAS([AC_PROG_NM], [LT_PATH_NM]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AM_PROG_NM], []) dnl AC_DEFUN([AC_PROG_NM], []) # _LT_CHECK_SHAREDLIB_FROM_LINKLIB # -------------------------------- # how to determine the name of the shared library # associated with a specific link library. # -- PORTME fill in with the dynamic library characteristics m4_defun([_LT_CHECK_SHAREDLIB_FROM_LINKLIB], [m4_require([_LT_DECL_EGREP]) m4_require([_LT_DECL_OBJDUMP]) m4_require([_LT_DECL_DLLTOOL]) AC_CACHE_CHECK([how to associate runtime and link libraries], lt_cv_sharedlib_from_linklib_cmd, [lt_cv_sharedlib_from_linklib_cmd='unknown' case $host_os in cygwin* | mingw* | pw32* | cegcc*) # two different shell functions defined in ltmain.sh # decide which to use based on capabilities of $DLLTOOL case `$DLLTOOL --help 2>&1` in *--identify-strict*) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib ;; *) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback ;; esac ;; *) # fallback: assume linklib IS sharedlib lt_cv_sharedlib_from_linklib_cmd="$ECHO" ;; esac ]) sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO _LT_DECL([], [sharedlib_from_linklib_cmd], [1], [Command to associate shared and link libraries]) ])# _LT_CHECK_SHAREDLIB_FROM_LINKLIB # _LT_PATH_MANIFEST_TOOL # ---------------------- # locate the manifest tool m4_defun([_LT_PATH_MANIFEST_TOOL], [AC_CHECK_TOOL(MANIFEST_TOOL, mt, :) test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt AC_CACHE_CHECK([if $MANIFEST_TOOL is a manifest tool], [lt_cv_path_mainfest_tool], [lt_cv_path_mainfest_tool=no echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&AS_MESSAGE_LOG_FD $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out cat conftest.err >&AS_MESSAGE_LOG_FD if $GREP 'Manifest Tool' conftest.out > /dev/null; then lt_cv_path_mainfest_tool=yes fi rm -f conftest*]) if test "x$lt_cv_path_mainfest_tool" != xyes; then MANIFEST_TOOL=: fi _LT_DECL([], [MANIFEST_TOOL], [1], [Manifest tool])dnl ])# _LT_PATH_MANIFEST_TOOL # LT_LIB_M # -------- # check for math library AC_DEFUN([LT_LIB_M], [AC_REQUIRE([AC_CANONICAL_HOST])dnl LIBM= case $host in *-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*) # These system don't have libm, or don't need it ;; *-ncr-sysv4.3*) AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw") AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm") ;; *) AC_CHECK_LIB(m, cos, LIBM="-lm") ;; esac AC_SUBST([LIBM]) ])# LT_LIB_M # Old name: AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_CHECK_LIBM], []) # _LT_COMPILER_NO_RTTI([TAGNAME]) # ------------------------------- m4_defun([_LT_COMPILER_NO_RTTI], [m4_require([_LT_TAG_COMPILER])dnl _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= if test "$GCC" = yes; then case $cc_basename in nvcc*) _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -Xcompiler -fno-builtin' ;; *) _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin' ;; esac _LT_COMPILER_OPTION([if $compiler supports -fno-rtti -fno-exceptions], lt_cv_prog_compiler_rtti_exceptions, [-fno-rtti -fno-exceptions], [], [_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)="$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1) -fno-rtti -fno-exceptions"]) fi _LT_TAGDECL([no_builtin_flag], [lt_prog_compiler_no_builtin_flag], [1], [Compiler flag to turn off builtin functions]) ])# _LT_COMPILER_NO_RTTI # _LT_CMD_GLOBAL_SYMBOLS # ---------------------- m4_defun([_LT_CMD_GLOBAL_SYMBOLS], [AC_REQUIRE([AC_CANONICAL_HOST])dnl AC_REQUIRE([AC_PROG_CC])dnl AC_REQUIRE([AC_PROG_AWK])dnl AC_REQUIRE([LT_PATH_NM])dnl AC_REQUIRE([LT_PATH_LD])dnl m4_require([_LT_DECL_SED])dnl m4_require([_LT_DECL_EGREP])dnl m4_require([_LT_TAG_COMPILER])dnl # Check for command to grab the raw symbol name followed by C symbol from nm. AC_MSG_CHECKING([command to parse $NM output from $compiler object]) AC_CACHE_VAL([lt_cv_sys_global_symbol_pipe], [ # These are sane defaults that work on at least a few old systems. # [They come from Ultrix. What could be older than Ultrix?!! ;)] # Character class describing NM global symbol codes. symcode='[[BCDEGRST]]' # Regexp to match symbols that can be accessed directly from C. sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)' # Define system-specific variables. case $host_os in aix*) symcode='[[BCDT]]' ;; cygwin* | mingw* | pw32* | cegcc*) symcode='[[ABCDGISTW]]' ;; hpux*) if test "$host_cpu" = ia64; then symcode='[[ABCDEGRST]]' fi ;; irix* | nonstopux*) symcode='[[BCDEGRST]]' ;; osf*) symcode='[[BCDEGQRST]]' ;; solaris*) symcode='[[BDRT]]' ;; sco3.2v5*) symcode='[[DT]]' ;; sysv4.2uw2*) symcode='[[DT]]' ;; sysv5* | sco5v6* | unixware* | OpenUNIX*) symcode='[[ABDT]]' ;; sysv4) symcode='[[DFNSTU]]' ;; esac # If we're using GNU nm, then use its standard symbol codes. case `$NM -V 2>&1` in *GNU* | *'with BFD'*) symcode='[[ABCDGIRSTW]]' ;; esac # Transform an extracted symbol line into a proper C declaration. # Some systems (esp. on ia64) link data and code symbols differently, # so use this general approach. lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'" # Transform an extracted symbol line into symbol name and symbol address lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([[^ ]]*\)[[ ]]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/ {\"\2\", (void *) \&\2},/p'" lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \([[^ ]]*\)[[ ]]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \(lib[[^ ]]*\)$/ {\"\2\", (void *) \&\2},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/ {\"lib\2\", (void *) \&\2},/p'" # Handle CRLF in mingw tool chain opt_cr= case $build_os in mingw*) opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp ;; esac # Try without a prefix underscore, then with it. for ac_symprfx in "" "_"; do # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. symxfrm="\\1 $ac_symprfx\\2 \\2" # Write the raw and C identifiers. if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Fake it for dumpbin and say T for any non-static function # and D for any global variable. # Also find C++ and __fastcall symbols from MSVC++, # which start with @ or ?. lt_cv_sys_global_symbol_pipe="$AWK ['"\ " {last_section=section; section=\$ 3};"\ " /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ " /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ " \$ 0!~/External *\|/{next};"\ " / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ " {if(hide[section]) next};"\ " {f=0}; \$ 0~/\(\).*\|/{f=1}; {printf f ? \"T \" : \"D \"};"\ " {split(\$ 0, a, /\||\r/); split(a[2], s)};"\ " s[1]~/^[@?]/{print s[1], s[1]; next};"\ " s[1]~prfx {split(s[1],t,\"@\"); print t[1], substr(t[1],length(prfx))}"\ " ' prfx=^$ac_symprfx]" else lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[[ ]]\($symcode$symcode*\)[[ ]][[ ]]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" fi lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" # Check to see that the pipe works correctly. pipe_works=no rm -f conftest* cat > conftest.$ac_ext <<_LT_EOF #ifdef __cplusplus extern "C" { #endif char nm_test_var; void nm_test_func(void); void nm_test_func(void){} #ifdef __cplusplus } #endif int main(){nm_test_var='a';nm_test_func();return(0);} _LT_EOF if AC_TRY_EVAL(ac_compile); then # Now try to grab the symbols. nlist=conftest.nm if AC_TRY_EVAL(NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) && test -s "$nlist"; then # Try sorting and uniquifying the output. if sort "$nlist" | uniq > "$nlist"T; then mv -f "$nlist"T "$nlist" else rm -f "$nlist"T fi # Make sure that we snagged all the symbols we need. if $GREP ' nm_test_var$' "$nlist" >/dev/null; then if $GREP ' nm_test_func$' "$nlist" >/dev/null; then cat <<_LT_EOF > conftest.$ac_ext /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) /* DATA imports from DLLs on WIN32 con't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT@&t@_DLSYM_CONST #elif defined(__osf__) /* This system does not cope well with relocations in const data. */ # define LT@&t@_DLSYM_CONST #else # define LT@&t@_DLSYM_CONST const #endif #ifdef __cplusplus extern "C" { #endif _LT_EOF # Now generate the symbol file. eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' cat <<_LT_EOF >> conftest.$ac_ext /* The mapping between symbol names and symbols. */ LT@&t@_DLSYM_CONST struct { const char *name; void *address; } lt__PROGRAM__LTX_preloaded_symbols[[]] = { { "@PROGRAM@", (void *) 0 }, _LT_EOF $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/ {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext cat <<\_LT_EOF >> conftest.$ac_ext {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt__PROGRAM__LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif _LT_EOF # Now try linking the two files. mv conftest.$ac_objext conftstm.$ac_objext lt_globsym_save_LIBS=$LIBS lt_globsym_save_CFLAGS=$CFLAGS LIBS="conftstm.$ac_objext" CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)" if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then pipe_works=yes fi LIBS=$lt_globsym_save_LIBS CFLAGS=$lt_globsym_save_CFLAGS else echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD fi else echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD fi else echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD fi else echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD cat conftest.$ac_ext >&5 fi rm -rf conftest* conftst* # Do not use the global_symbol_pipe unless it works. if test "$pipe_works" = yes; then break else lt_cv_sys_global_symbol_pipe= fi done ]) if test -z "$lt_cv_sys_global_symbol_pipe"; then lt_cv_sys_global_symbol_to_cdecl= fi if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then AC_MSG_RESULT(failed) else AC_MSG_RESULT(ok) fi # Response file support. if test "$lt_cv_nm_interface" = "MS dumpbin"; then nm_file_list_spec='@' elif $NM --help 2>/dev/null | grep '[[@]]FILE' >/dev/null; then nm_file_list_spec='@' fi _LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1], [Take the output of nm and produce a listing of raw symbols and C names]) _LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1], [Transform the output of nm in a proper C declaration]) _LT_DECL([global_symbol_to_c_name_address], [lt_cv_sys_global_symbol_to_c_name_address], [1], [Transform the output of nm in a C name address pair]) _LT_DECL([global_symbol_to_c_name_address_lib_prefix], [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1], [Transform the output of nm in a C name address pair when lib prefix is needed]) _LT_DECL([], [nm_file_list_spec], [1], [Specify filename containing input files for $NM]) ]) # _LT_CMD_GLOBAL_SYMBOLS # _LT_COMPILER_PIC([TAGNAME]) # --------------------------- m4_defun([_LT_COMPILER_PIC], [m4_require([_LT_TAG_COMPILER])dnl _LT_TAGVAR(lt_prog_compiler_wl, $1)= _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)= m4_if([$1], [CXX], [ # C++ specific cases for pic, static, wl, etc. if test "$GXX" = yes; then _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' case $host_os in aix*) # All AIX code is PIC. if test "$host_cpu" = ia64; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi ;; amigaos*) case $host_cpu in powerpc) # see comment about AmigaOS4 .so support _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; m68k) # FIXME: we need at least 68020 code to build shared libraries, but # adding the `-m68020' flag to GCC prevents building anything better, # like `-m68040'. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' ;; esac ;; beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) # PIC is the default for these OSes. ;; mingw* | cygwin* | os2* | pw32* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). # Although the cygwin gcc ignores -fPIC, still need this for old-style # (--disable-auto-import) libraries m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) ;; darwin* | rhapsody*) # PIC is the default on this platform # Common symbols not allowed in MH_DYLIB files _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' ;; *djgpp*) # DJGPP does not support shared libraries at all _LT_TAGVAR(lt_prog_compiler_pic, $1)= ;; haiku*) # PIC is the default for Haiku. # The "-static" flag exists, but is broken. _LT_TAGVAR(lt_prog_compiler_static, $1)= ;; interix[[3-9]]*) # Interix 3.x gcc -fpic/-fPIC options generate broken code. # Instead, we relocate shared libraries at runtime. ;; sysv4*MP*) if test -d /usr/nec; then _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic fi ;; hpux*) # PIC is the default for 64-bit PA HP-UX, but not for 32-bit # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag # sets the default TLS model and affects inlining. case $host_cpu in hppa*64*) ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac ;; *qnx* | *nto*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac else case $host_os in aix[[4-9]]*) # All AIX code is PIC. if test "$host_cpu" = ia64; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' else _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' fi ;; chorus*) case $cc_basename in cxch68*) # Green Hills C++ Compiler # _LT_TAGVAR(lt_prog_compiler_static, $1)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a" ;; esac ;; mingw* | cygwin* | os2* | pw32* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) ;; dgux*) case $cc_basename in ec++*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' ;; ghcx*) # Green Hills C++ Compiler _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; *) ;; esac ;; freebsd* | dragonfly*) # FreeBSD uses GNU C++ ;; hpux9* | hpux10* | hpux11*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' if test "$host_cpu" != ia64; then _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' fi ;; aCC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' case $host_cpu in hppa*64*|ia64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' ;; esac ;; *) ;; esac ;; interix*) # This is c89, which is MS Visual C++ (no shared libs) # Anyone wants to do a port? ;; irix5* | irix6* | nonstopux*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' # CC pic flag -KPIC is the default. ;; *) ;; esac ;; linux* | k*bsd*-gnu | kopensolaris*-gnu) case $cc_basename in KCC*) # KAI C++ Compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; ecpc* ) # old Intel C++ for x86_64 which still supported -KPIC. _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; icpc* ) # Intel C++, used to be incompatible with GCC. # ICC 10 doesn't accept -KPIC any more. _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; pgCC* | pgcpp*) # Portland Group C++ compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; cxx*) # Compaq C++ # Make sure the PIC flag is empty. It appears that all Alpha # Linux and Compaq Tru64 Unix objects are PIC. _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; xlc* | xlC* | bgxl[[cC]]* | mpixl[[cC]]*) # IBM XL 8.0, 9.0 on PPC and BlueGene _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' ;; *) case `$CC -V 2>&1 | sed 5q` in *Sun\ C*) # Sun C++ 5.9 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; esac ;; esac ;; lynxos*) ;; m88k*) ;; mvs*) case $cc_basename in cxx*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall' ;; *) ;; esac ;; netbsd*) ;; *qnx* | *nto*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; osf3* | osf4* | osf5*) case $cc_basename in KCC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' ;; RCC*) # Rational C++ 2.4.1 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; cxx*) # Digital/Compaq C++ _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # Make sure the PIC flag is empty. It appears that all Alpha # Linux and Compaq Tru64 Unix objects are PIC. _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; *) ;; esac ;; psos*) ;; solaris*) case $cc_basename in CC* | sunCC*) # Sun C++ 4.2, 5.x and Centerline C++ _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; gcx*) # Green Hills C++ Compiler _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' ;; *) ;; esac ;; sunos4*) case $cc_basename in CC*) # Sun C++ 4.x _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; lcc*) # Lucid _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; *) ;; esac ;; sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; esac ;; tandem*) case $cc_basename in NCC*) # NonStop-UX NCC 3.20 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' ;; *) ;; esac ;; vxworks*) ;; *) _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; esac fi ], [ if test "$GCC" = yes; then _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' case $host_os in aix*) # All AIX code is PIC. if test "$host_cpu" = ia64; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi ;; amigaos*) case $host_cpu in powerpc) # see comment about AmigaOS4 .so support _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; m68k) # FIXME: we need at least 68020 code to build shared libraries, but # adding the `-m68020' flag to GCC prevents building anything better, # like `-m68040'. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' ;; esac ;; beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) # PIC is the default for these OSes. ;; mingw* | cygwin* | pw32* | os2* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). # Although the cygwin gcc ignores -fPIC, still need this for old-style # (--disable-auto-import) libraries m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) ;; darwin* | rhapsody*) # PIC is the default on this platform # Common symbols not allowed in MH_DYLIB files _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' ;; haiku*) # PIC is the default for Haiku. # The "-static" flag exists, but is broken. _LT_TAGVAR(lt_prog_compiler_static, $1)= ;; hpux*) # PIC is the default for 64-bit PA HP-UX, but not for 32-bit # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag # sets the default TLS model and affects inlining. case $host_cpu in hppa*64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac ;; interix[[3-9]]*) # Interix 3.x gcc -fpic/-fPIC options generate broken code. # Instead, we relocate shared libraries at runtime. ;; msdosdjgpp*) # Just because we use GCC doesn't mean we suddenly get shared libraries # on systems that don't support them. _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no enable_shared=no ;; *nto* | *qnx*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; sysv4*MP*) if test -d /usr/nec; then _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic fi ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac case $cc_basename in nvcc*) # Cuda Compiler Driver 2.2 _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Xlinker ' if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then _LT_TAGVAR(lt_prog_compiler_pic, $1)="-Xcompiler $_LT_TAGVAR(lt_prog_compiler_pic, $1)" fi ;; esac else # PORTME Check for flag to pass linker flags through the system compiler. case $host_os in aix*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' if test "$host_cpu" = ia64; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' else _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' fi ;; mingw* | cygwin* | pw32* | os2* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) ;; hpux9* | hpux10* | hpux11*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but # not for PA HP-UX. case $host_cpu in hppa*64*|ia64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' ;; esac # Is there a better lt_prog_compiler_static that works with the bundled CC? _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive' ;; irix5* | irix6* | nonstopux*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # PIC (with -KPIC) is the default. _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; linux* | k*bsd*-gnu | kopensolaris*-gnu) case $cc_basename in # old Intel for x86_64 which still supported -KPIC. ecc*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; # icc used to be incompatible with GCC. # ICC 10 doesn't accept -KPIC any more. icc* | ifort*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; # Lahey Fortran 8.1. lf95*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='--shared' _LT_TAGVAR(lt_prog_compiler_static, $1)='--static' ;; nagfor*) # NAG Fortran compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*) # Portland Group compilers (*not* the Pentium gcc compiler, # which looks to be a dead project) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; ccc*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # All Alpha code is PIC. _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; xl* | bgxl* | bgf* | mpixl*) # IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' ;; *) case `$CC -V 2>&1 | sed 5q` in *Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [[1-7]].* | *Sun*Fortran*\ 8.[[0-3]]*) # Sun Fortran 8.3 passes all unrecognized flags to the linker _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='' ;; *Sun\ F* | *Sun*Fortran*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; *Sun\ C*) # Sun C 5.9 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' ;; *Intel*\ [[CF]]*Compiler*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; *Portland\ Group*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; esac ;; esac ;; newsos6) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; *nto* | *qnx*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; osf3* | osf4* | osf5*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # All OSF/1 code is PIC. _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; rdos*) _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; solaris*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' case $cc_basename in f77* | f90* | f95* | sunf77* | sunf90* | sunf95*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ';; *) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,';; esac ;; sunos4*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; sysv4 | sysv4.2uw2* | sysv4.3*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; sysv4*MP*) if test -d /usr/nec ;then _LT_TAGVAR(lt_prog_compiler_pic, $1)='-Kconform_pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi ;; sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; unicos*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; uts4*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; *) _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; esac fi ]) case $host_os in # For platforms which do not support PIC, -DPIC is meaningless: *djgpp*) _LT_TAGVAR(lt_prog_compiler_pic, $1)= ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)="$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])" ;; esac AC_CACHE_CHECK([for $compiler option to produce PIC], [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)], [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_prog_compiler_pic, $1)]) _LT_TAGVAR(lt_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_cv_prog_compiler_pic, $1) # # Check to make sure the PIC flag actually works. # if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then _LT_COMPILER_OPTION([if $compiler PIC flag $_LT_TAGVAR(lt_prog_compiler_pic, $1) works], [_LT_TAGVAR(lt_cv_prog_compiler_pic_works, $1)], [$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])], [], [case $_LT_TAGVAR(lt_prog_compiler_pic, $1) in "" | " "*) ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)=" $_LT_TAGVAR(lt_prog_compiler_pic, $1)" ;; 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osf4* | osf5*) # as osf3* with the addition of -msym flag if test "$GCC" = yes; then _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*' _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $pic_flag $libobjs $deplibs $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir' else _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*' _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~ $CC -shared${allow_undefined_flag} ${wl}-input ${wl}$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib~$RM $lib.exp' # Both c and cxx compiler support -rpath directly _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir' fi _LT_TAGVAR(archive_cmds_need_lc, $1)='no' _LT_TAGVAR(hardcode_libdir_separator, $1)=: ;; solaris*) _LT_TAGVAR(no_undefined_flag, $1)=' -z defs' if test "$GCC" = yes; then wlarc='${wl}' _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' else case `$CC -V 2>&1` in *"Compilers 5.0"*) wlarc='' _LT_TAGVAR(archive_cmds, $1)='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' ;; *) wlarc='${wl}' _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' ;; esac fi _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' _LT_TAGVAR(hardcode_shlibpath_var, $1)=no case $host_os in solaris2.[[0-5]] | solaris2.[[0-5]].*) ;; *) # The compiler driver will combine and reorder linker options, # but understands `-z linker_flag'. GCC discards it without `$wl', # but is careful enough not to reorder. # Supported since Solaris 2.6 (maybe 2.5.1?) if test "$GCC" = yes; then _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract' else _LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract' fi ;; esac _LT_TAGVAR(link_all_deplibs, $1)=yes ;; sunos4*) if test "x$host_vendor" = xsequent; then # Use $CC to link under sequent, because it throws in some extra .o # files that make .init and .fini sections work. _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags' else _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags' fi _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' _LT_TAGVAR(hardcode_direct, $1)=yes _LT_TAGVAR(hardcode_minus_L, $1)=yes _LT_TAGVAR(hardcode_shlibpath_var, $1)=no ;; sysv4) case $host_vendor in sni) _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(hardcode_direct, $1)=yes # is this really true??? ;; siemens) ## LD is ld it makes a PLAMLIB ## CC just makes a GrossModule. _LT_TAGVAR(archive_cmds, $1)='$LD -G -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(reload_cmds, $1)='$CC -r -o $output$reload_objs' _LT_TAGVAR(hardcode_direct, $1)=no ;; motorola) _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(hardcode_direct, $1)=no #Motorola manual says yes, but my tests say they lie ;; esac runpath_var='LD_RUN_PATH' _LT_TAGVAR(hardcode_shlibpath_var, $1)=no ;; sysv4.3*) _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(hardcode_shlibpath_var, $1)=no _LT_TAGVAR(export_dynamic_flag_spec, $1)='-Bexport' ;; sysv4*MP*) if test -d /usr/nec; then _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(hardcode_shlibpath_var, $1)=no runpath_var=LD_RUN_PATH hardcode_runpath_var=yes _LT_TAGVAR(ld_shlibs, $1)=yes fi ;; sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*) _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text' _LT_TAGVAR(archive_cmds_need_lc, $1)=no _LT_TAGVAR(hardcode_shlibpath_var, $1)=no runpath_var='LD_RUN_PATH' if test "$GCC" = yes; then _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' else _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' fi ;; sysv5* | sco3.2v5* | sco5v6*) # Note: We can NOT use -z defs as we might desire, because we do not # link with -lc, and that would cause any symbols used from libc to # always be unresolved, which means just about no library would # ever link correctly. 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(KAI) C++ Compiler # KCC will only create a shared library if the output file # ends with ".so" (or ".sl" for HP-UX), so rename the library # to its proper name (with version) after linking. _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib ${wl}-retain-symbols-file,$export_symbols; mv \$templib $lib' # Commands to make compiler produce verbose output that lists # what "hidden" libraries, object files and flags are used when # linking a shared library. # # There doesn't appear to be a way to prevent this compiler from # explicitly linking system object files so we need to strip them # from the output so that they don't get included in the library # dependencies. output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; 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These are needed # for certain cross-compile configurations and native mingw. m4_defun([_LT_PATH_CONVERSION_FUNCTIONS], [AC_REQUIRE([AC_CANONICAL_HOST])dnl AC_REQUIRE([AC_CANONICAL_BUILD])dnl AC_MSG_CHECKING([how to convert $build file names to $host format]) AC_CACHE_VAL(lt_cv_to_host_file_cmd, [case $host in *-*-mingw* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32 ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32 ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32 ;; esac ;; *-*-cygwin* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_noop ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin ;; esac ;; * ) # unhandled hosts (and "normal" native builds) lt_cv_to_host_file_cmd=func_convert_file_noop ;; esac ]) to_host_file_cmd=$lt_cv_to_host_file_cmd AC_MSG_RESULT([$lt_cv_to_host_file_cmd]) _LT_DECL([to_host_file_cmd], [lt_cv_to_host_file_cmd], [0], [convert $build file names to $host format])dnl AC_MSG_CHECKING([how to convert $build file names to toolchain format]) AC_CACHE_VAL(lt_cv_to_tool_file_cmd, [#assume ordinary cross tools, or native build. lt_cv_to_tool_file_cmd=func_convert_file_noop case $host in *-*-mingw* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32 ;; esac ;; esac ]) to_tool_file_cmd=$lt_cv_to_tool_file_cmd AC_MSG_RESULT([$lt_cv_to_tool_file_cmd]) _LT_DECL([to_tool_file_cmd], [lt_cv_to_tool_file_cmd], [0], [convert $build files to toolchain format])dnl ])# _LT_PATH_CONVERSION_FUNCTIONS # Helper functions for option handling. -*- Autoconf -*- # # Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation, # Inc. # Written by Gary V. Vaughan, 2004 # # This file is free software; the Free Software Foundation gives # unlimited permission to copy and/or distribute it, with or without # modifications, as long as this notice is preserved. # serial 7 ltoptions.m4 # This is to help aclocal find these macros, as it can't see m4_define. AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])]) # _LT_MANGLE_OPTION(MACRO-NAME, OPTION-NAME) # ------------------------------------------ m4_define([_LT_MANGLE_OPTION], [[_LT_OPTION_]m4_bpatsubst($1__$2, [[^a-zA-Z0-9_]], [_])]) # _LT_SET_OPTION(MACRO-NAME, OPTION-NAME) # --------------------------------------- # Set option OPTION-NAME for macro MACRO-NAME, and if there is a # matching handler defined, dispatch to it. Other OPTION-NAMEs are # saved as a flag. m4_define([_LT_SET_OPTION], [m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]), _LT_MANGLE_DEFUN([$1], [$2]), [m4_warning([Unknown $1 option `$2'])])[]dnl ]) # _LT_IF_OPTION(MACRO-NAME, OPTION-NAME, IF-SET, [IF-NOT-SET]) # ------------------------------------------------------------ # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise. m4_define([_LT_IF_OPTION], [m4_ifdef(_LT_MANGLE_OPTION([$1], [$2]), [$3], [$4])]) # _LT_UNLESS_OPTIONS(MACRO-NAME, OPTION-LIST, IF-NOT-SET) # ------------------------------------------------------- # Execute IF-NOT-SET unless all options in OPTION-LIST for MACRO-NAME # are set. m4_define([_LT_UNLESS_OPTIONS], [m4_foreach([_LT_Option], m4_split(m4_normalize([$2])), [m4_ifdef(_LT_MANGLE_OPTION([$1], _LT_Option), [m4_define([$0_found])])])[]dnl m4_ifdef([$0_found], [m4_undefine([$0_found])], [$3 ])[]dnl ]) # _LT_SET_OPTIONS(MACRO-NAME, OPTION-LIST) # ---------------------------------------- # OPTION-LIST is a space-separated list of Libtool options associated # with MACRO-NAME. If any OPTION has a matching handler declared with # LT_OPTION_DEFINE, dispatch to that macro; otherwise complain about # the unknown option and exit. m4_defun([_LT_SET_OPTIONS], [# Set options m4_foreach([_LT_Option], m4_split(m4_normalize([$2])), [_LT_SET_OPTION([$1], _LT_Option)]) m4_if([$1],[LT_INIT],[ dnl dnl Simply set some default values (i.e off) if boolean options were not dnl specified: _LT_UNLESS_OPTIONS([LT_INIT], [dlopen], [enable_dlopen=no ]) _LT_UNLESS_OPTIONS([LT_INIT], [win32-dll], [enable_win32_dll=no ]) dnl dnl If no reference was made to various pairs of opposing options, then dnl we run the default mode handler for the pair. For example, if neither dnl `shared' nor `disable-shared' was passed, we enable building of shared dnl archives by default: _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED]) _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC]) _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC]) _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install], [_LT_ENABLE_FAST_INSTALL]) ]) ])# _LT_SET_OPTIONS # _LT_MANGLE_DEFUN(MACRO-NAME, OPTION-NAME) # ----------------------------------------- m4_define([_LT_MANGLE_DEFUN], [[_LT_OPTION_DEFUN_]m4_bpatsubst(m4_toupper([$1__$2]), [[^A-Z0-9_]], [_])]) # LT_OPTION_DEFINE(MACRO-NAME, OPTION-NAME, CODE) # ----------------------------------------------- m4_define([LT_OPTION_DEFINE], [m4_define(_LT_MANGLE_DEFUN([$1], [$2]), [$3])[]dnl ])# LT_OPTION_DEFINE # dlopen # ------ LT_OPTION_DEFINE([LT_INIT], [dlopen], [enable_dlopen=yes ]) AU_DEFUN([AC_LIBTOOL_DLOPEN], [_LT_SET_OPTION([LT_INIT], [dlopen]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the `dlopen' option into LT_INIT's first parameter.]) ]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_DLOPEN], []) # win32-dll # --------- # Declare package support for building win32 dll's. LT_OPTION_DEFINE([LT_INIT], [win32-dll], [enable_win32_dll=yes case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*) AC_CHECK_TOOL(AS, as, false) AC_CHECK_TOOL(DLLTOOL, dlltool, false) AC_CHECK_TOOL(OBJDUMP, objdump, false) ;; esac test -z "$AS" && AS=as _LT_DECL([], [AS], [1], [Assembler program])dnl test -z "$DLLTOOL" && DLLTOOL=dlltool _LT_DECL([], [DLLTOOL], [1], [DLL creation program])dnl test -z "$OBJDUMP" && OBJDUMP=objdump _LT_DECL([], [OBJDUMP], [1], [Object dumper program])dnl ])# win32-dll AU_DEFUN([AC_LIBTOOL_WIN32_DLL], [AC_REQUIRE([AC_CANONICAL_HOST])dnl _LT_SET_OPTION([LT_INIT], [win32-dll]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the `win32-dll' option into LT_INIT's first parameter.]) ]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], []) # _LT_ENABLE_SHARED([DEFAULT]) # ---------------------------- # implement the --enable-shared flag, and supports the `shared' and # `disable-shared' LT_INIT options. # DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. m4_define([_LT_ENABLE_SHARED], [m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl AC_ARG_ENABLE([shared], [AS_HELP_STRING([--enable-shared@<:@=PKGS@:>@], [build shared libraries @<:@default=]_LT_ENABLE_SHARED_DEFAULT[@:>@])], [p=${PACKAGE-default} case $enableval in yes) enable_shared=yes ;; no) enable_shared=no ;; *) enable_shared=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_shared=yes fi done IFS="$lt_save_ifs" ;; esac], [enable_shared=]_LT_ENABLE_SHARED_DEFAULT) _LT_DECL([build_libtool_libs], [enable_shared], [0], [Whether or not to build shared libraries]) ])# _LT_ENABLE_SHARED LT_OPTION_DEFINE([LT_INIT], [shared], [_LT_ENABLE_SHARED([yes])]) LT_OPTION_DEFINE([LT_INIT], [disable-shared], [_LT_ENABLE_SHARED([no])]) # Old names: AC_DEFUN([AC_ENABLE_SHARED], [_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared]) ]) AC_DEFUN([AC_DISABLE_SHARED], [_LT_SET_OPTION([LT_INIT], [disable-shared]) ]) AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)]) AU_DEFUN([AM_DISABLE_SHARED], [AC_DISABLE_SHARED($@)]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AM_ENABLE_SHARED], []) dnl AC_DEFUN([AM_DISABLE_SHARED], []) # _LT_ENABLE_STATIC([DEFAULT]) # ---------------------------- # implement the --enable-static flag, and support the `static' and # `disable-static' LT_INIT options. # DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. m4_define([_LT_ENABLE_STATIC], [m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl AC_ARG_ENABLE([static], [AS_HELP_STRING([--enable-static@<:@=PKGS@:>@], [build static libraries @<:@default=]_LT_ENABLE_STATIC_DEFAULT[@:>@])], [p=${PACKAGE-default} case $enableval in yes) enable_static=yes ;; no) enable_static=no ;; *) enable_static=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_static=yes fi done IFS="$lt_save_ifs" ;; esac], [enable_static=]_LT_ENABLE_STATIC_DEFAULT) _LT_DECL([build_old_libs], [enable_static], [0], [Whether or not to build static libraries]) ])# _LT_ENABLE_STATIC LT_OPTION_DEFINE([LT_INIT], [static], [_LT_ENABLE_STATIC([yes])]) LT_OPTION_DEFINE([LT_INIT], [disable-static], [_LT_ENABLE_STATIC([no])]) # Old names: AC_DEFUN([AC_ENABLE_STATIC], [_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[static]) ]) AC_DEFUN([AC_DISABLE_STATIC], [_LT_SET_OPTION([LT_INIT], [disable-static]) ]) AU_DEFUN([AM_ENABLE_STATIC], [AC_ENABLE_STATIC($@)]) AU_DEFUN([AM_DISABLE_STATIC], [AC_DISABLE_STATIC($@)]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AM_ENABLE_STATIC], []) dnl AC_DEFUN([AM_DISABLE_STATIC], []) # _LT_ENABLE_FAST_INSTALL([DEFAULT]) # ---------------------------------- # implement the --enable-fast-install flag, and support the `fast-install' # and `disable-fast-install' LT_INIT options. # DEFAULT is either `yes' or `no'. If omitted, it defaults to `yes'. m4_define([_LT_ENABLE_FAST_INSTALL], [m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl AC_ARG_ENABLE([fast-install], [AS_HELP_STRING([--enable-fast-install@<:@=PKGS@:>@], [optimize for fast installation @<:@default=]_LT_ENABLE_FAST_INSTALL_DEFAULT[@:>@])], [p=${PACKAGE-default} case $enableval in yes) enable_fast_install=yes ;; no) enable_fast_install=no ;; *) enable_fast_install=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_fast_install=yes fi done IFS="$lt_save_ifs" ;; esac], [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT) _LT_DECL([fast_install], [enable_fast_install], [0], [Whether or not to optimize for fast installation])dnl ])# _LT_ENABLE_FAST_INSTALL LT_OPTION_DEFINE([LT_INIT], [fast-install], [_LT_ENABLE_FAST_INSTALL([yes])]) LT_OPTION_DEFINE([LT_INIT], [disable-fast-install], [_LT_ENABLE_FAST_INSTALL([no])]) # Old names: AU_DEFUN([AC_ENABLE_FAST_INSTALL], [_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the `fast-install' option into LT_INIT's first parameter.]) ]) AU_DEFUN([AC_DISABLE_FAST_INSTALL], [_LT_SET_OPTION([LT_INIT], [disable-fast-install]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the `disable-fast-install' option into LT_INIT's first parameter.]) ]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], []) dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], []) # _LT_WITH_PIC([MODE]) # -------------------- # implement the --with-pic flag, and support the `pic-only' and `no-pic' # LT_INIT options. # MODE is either `yes' or `no'. If omitted, it defaults to `both'. m4_define([_LT_WITH_PIC], [AC_ARG_WITH([pic], [AS_HELP_STRING([--with-pic@<:@=PKGS@:>@], [try to use only PIC/non-PIC objects @<:@default=use both@:>@])], [lt_p=${PACKAGE-default} case $withval in yes|no) pic_mode=$withval ;; *) pic_mode=default # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for lt_pkg in $withval; do IFS="$lt_save_ifs" if test "X$lt_pkg" = "X$lt_p"; then pic_mode=yes fi done IFS="$lt_save_ifs" ;; esac], [pic_mode=default]) test -z "$pic_mode" && pic_mode=m4_default([$1], [default]) _LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl ])# _LT_WITH_PIC LT_OPTION_DEFINE([LT_INIT], [pic-only], [_LT_WITH_PIC([yes])]) LT_OPTION_DEFINE([LT_INIT], [no-pic], [_LT_WITH_PIC([no])]) # Old name: AU_DEFUN([AC_LIBTOOL_PICMODE], [_LT_SET_OPTION([LT_INIT], [pic-only]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the `pic-only' option into LT_INIT's first parameter.]) ]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_PICMODE], []) m4_define([_LTDL_MODE], []) LT_OPTION_DEFINE([LTDL_INIT], [nonrecursive], [m4_define([_LTDL_MODE], [nonrecursive])]) LT_OPTION_DEFINE([LTDL_INIT], [recursive], [m4_define([_LTDL_MODE], [recursive])]) LT_OPTION_DEFINE([LTDL_INIT], [subproject], [m4_define([_LTDL_MODE], [subproject])]) m4_define([_LTDL_TYPE], []) LT_OPTION_DEFINE([LTDL_INIT], [installable], [m4_define([_LTDL_TYPE], [installable])]) LT_OPTION_DEFINE([LTDL_INIT], [convenience], [m4_define([_LTDL_TYPE], [convenience])]) # ltsugar.m4 -- libtool m4 base layer. -*-Autoconf-*- # # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc. # Written by Gary V. Vaughan, 2004 # # This file is free software; the Free Software Foundation gives # unlimited permission to copy and/or distribute it, with or without # modifications, as long as this notice is preserved. # serial 6 ltsugar.m4 # This is to help aclocal find these macros, as it can't see m4_define. AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])]) # lt_join(SEP, ARG1, [ARG2...]) # ----------------------------- # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their # associated separator. # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier # versions in m4sugar had bugs. m4_define([lt_join], [m4_if([$#], [1], [], [$#], [2], [[$2]], [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])]) m4_define([_lt_join], [m4_if([$#$2], [2], [], [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])]) # lt_car(LIST) # lt_cdr(LIST) # ------------ # Manipulate m4 lists. # These macros are necessary as long as will still need to support # Autoconf-2.59 which quotes differently. m4_define([lt_car], [[$1]]) m4_define([lt_cdr], [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])], [$#], 1, [], [m4_dquote(m4_shift($@))])]) m4_define([lt_unquote], $1) # lt_append(MACRO-NAME, STRING, [SEPARATOR]) # ------------------------------------------ # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'. # Note that neither SEPARATOR nor STRING are expanded; they are appended # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked). # No SEPARATOR is output if MACRO-NAME was previously undefined (different # than defined and empty). # # This macro is needed until we can rely on Autoconf 2.62, since earlier # versions of m4sugar mistakenly expanded SEPARATOR but not STRING. m4_define([lt_append], [m4_define([$1], m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])]) # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...]) # ---------------------------------------------------------- # Produce a SEP delimited list of all paired combinations of elements of # PREFIX-LIST with SUFFIX1 through SUFFIXn. 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Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #include "eio.h" #include "ecb.h" #ifdef EIO_STACKSIZE # define X_STACKSIZE EIO_STACKSIZE #endif #include "xthread.h" #include #include #include #include #include #include #include #include #include #include /* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ /* intptr_t only comes from stdint.h, says idiot openbsd coder */ #if HAVE_STDINT_H # include #endif #ifndef ECANCELED # define ECANCELED EDOM #endif #ifndef ELOOP # define ELOOP EDOM #endif #ifndef O_CLOEXEC # define O_CLOEXEC 0 #endif #if !defined(ENOTSOCK) && defined(WSAENOTSOCK) # define ENOTSOCK WSAENOTSOCK #endif static void eio_destroy (eio_req *req); #ifndef EIO_FINISH # define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 #endif #ifndef EIO_DESTROY # define EIO_DESTROY(req) do { if ((req)->destroy) (req)->destroy (req); } while (0) #endif #ifndef EIO_FEED # define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) #endif #ifndef EIO_FD_TO_WIN32_HANDLE # define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) #endif #ifndef EIO_WIN32_HANDLE_TO_FD # define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) #endif #define EIO_ERRNO(errval,retval) ((errno = errval), retval) #define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) #ifdef _WIN32 #undef PAGESIZE #define PAGESIZE 4096 /* GetSystemInfo? */ /* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */ #ifdef EIO_STRUCT_STATI64 /* look at perl's non-sloppy stat */ #define stat(path,buf) _stati64 (path,buf) #define fstat(fd,buf) _fstati64 (fd,buf) #endif #define lstat(path,buf) stat (path,buf) #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) #define mkdir(path,mode) _mkdir (path) #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) #define chmod(path,mode) _chmod (path, mode) #define dup(fd) _dup (fd) #define dup2(fd1,fd2) _dup2 (fd1, fd2) #define pipe(fds) _pipe (fds, 4096, O_BINARY) #define fchmod(fd,mode) EIO_ENOSYS () #define chown(path,uid,gid) EIO_ENOSYS () #define fchown(fd,uid,gid) EIO_ENOSYS () #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ #define mknod(path,mode,dev) EIO_ENOSYS () #define sync() EIO_ENOSYS () #define readlink(path,buf,s) EIO_ENOSYS () #define statvfs(path,buf) EIO_ENOSYS () #define fstatvfs(fd,buf) EIO_ENOSYS () #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset) #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset) #if __GNUC__ typedef long long eio_off_t; /* signed for compatibility to msvc */ #else typedef __int64 eio_off_t; /* unsigned not supported by msvc */ #endif static eio_ssize_t eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset) { OVERLAPPED o = { 0 }; DWORD got; o.Offset = offset; o.OffsetHigh = offset >> 32; return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) ? got : -1; } static eio_ssize_t eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset) { OVERLAPPED o = { 0 }; DWORD got; o.Offset = offset; o.OffsetHigh = offset >> 32; return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o) ? got : -1; } /* rename() uses MoveFile, which fails to overwrite */ #define rename(old,neu) eio__rename (old, neu) static int eio__rename (const char *old, const char *neu) { if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING)) return 0; /* should steal _dosmaperr */ switch (GetLastError ()) { case ERROR_FILE_NOT_FOUND: case ERROR_PATH_NOT_FOUND: case ERROR_INVALID_DRIVE: case ERROR_NO_MORE_FILES: case ERROR_BAD_NETPATH: case ERROR_BAD_NET_NAME: case ERROR_BAD_PATHNAME: case ERROR_FILENAME_EXCED_RANGE: errno = ENOENT; break; default: errno = EACCES; break; } return -1; } /* we could even stat and see if it exists */ static int symlink (const char *old, const char *neu) { #if WINVER >= 0x0600 if (CreateSymbolicLink (neu, old, 1)) return 0; if (CreateSymbolicLink (neu, old, 0)) return 0; #endif return EIO_ERRNO (ENOENT, -1); } /* POSIX API only, causing trouble for win32 apps */ #define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */ #define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */ struct statvfs { int dummy; }; #define DT_DIR EIO_DT_DIR #define DT_REG EIO_DT_REG #define D_NAME(entp) entp.cFileName #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) #else #include #include #include #include #include #ifdef ANDROID #include #define statvfs statfs #define fstatvfs fstatfs #include /* supposedly limits.h does #define PAGESIZE PAGESIZE */ #else #include #endif #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES #include #endif #define D_NAME(entp) entp->d_name /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ #if __FreeBSD__ || __NetBSD__ || __OpenBSD__ #define _DIRENT_HAVE_D_TYPE /* sigh */ #define D_INO(de) (de)->d_fileno #define D_NAMLEN(de) (de)->d_namlen #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 #define D_INO(de) (de)->d_ino #endif #ifdef _D_EXACT_NAMLEN #undef D_NAMLEN #define D_NAMLEN(de) _D_EXACT_NAMLEN (de) #endif #ifdef _DIRENT_HAVE_D_TYPE #define D_TYPE(de) (de)->d_type #endif #ifndef EIO_STRUCT_DIRENT #define EIO_STRUCT_DIRENT struct dirent #endif #endif #if HAVE_UTIMES # include #endif #if HAVE_SYS_SYSCALL_H # include #endif #if HAVE_SYS_PRCTL_H # include #endif #if HAVE_SENDFILE # if __linux # include # elif __FreeBSD__ || defined __APPLE__ # include # include # elif __hpux # include # elif __solaris # include # else # error sendfile support requested but not available # endif #endif #ifndef D_TYPE # define D_TYPE(de) 0 #endif #ifndef D_INO # define D_INO(de) 0 #endif #ifndef D_NAMLEN # define D_NAMLEN(entp) strlen (D_NAME (entp)) #endif /* used for struct dirent, AIX doesn't provide it */ #ifndef NAME_MAX # define NAME_MAX 4096 #endif /* used for readlink etc. */ #ifndef PATH_MAX # define PATH_MAX 4096 #endif /* buffer size for various temporary buffers */ #define EIO_BUFSIZE 65536 #define dBUF \ char *eio_buf = malloc (EIO_BUFSIZE); \ errno = ENOMEM; \ if (!eio_buf) \ return -1 #define FUBd \ free (eio_buf) /*****************************************************************************/ struct etp_tmpbuf; #if _POSIX_VERSION >= 200809L #define HAVE_AT 1 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD) #ifndef O_SEARCH #define O_SEARCH O_RDONLY #endif #else #define HAVE_AT 0 static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path); #endif struct eio_pwd { #if HAVE_AT int fd; #endif int len; char str[1]; /* actually, a 0-terminated canonical path */ }; /*****************************************************************************/ #define ETP_PRI_MIN EIO_PRI_MIN #define ETP_PRI_MAX EIO_PRI_MAX #define ETP_TYPE_QUIT -1 #define ETP_TYPE_GROUP EIO_GROUP static void eio_nop_callback (void) { } static void (*eio_want_poll_cb)(void) = eio_nop_callback; static void (*eio_done_poll_cb)(void) = eio_nop_callback; #define ETP_WANT_POLL(pool) eio_want_poll_cb () #define ETP_DONE_POLL(pool) eio_done_poll_cb () struct etp_worker; #define ETP_REQ eio_req #define ETP_DESTROY(req) eio_destroy (req) static int eio_finish (eio_req *req); #define ETP_FINISH(req) eio_finish (req) static void eio_execute (struct etp_worker *self, eio_req *req); #define ETP_EXECUTE(wrk,req) eio_execute (wrk, req) #include "etp.c" static struct etp_pool eio_pool; #define EIO_POOL (&eio_pool) /*****************************************************************************/ static void grp_try_feed (eio_req *grp) { while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) { grp->flags &= ~ETP_FLAG_GROUPADD; EIO_FEED (grp); /* stop if no progress has been made */ if (!(grp->flags & ETP_FLAG_GROUPADD)) { grp->feed = 0; break; } } } static int grp_dec (eio_req *grp) { --grp->size; /* call feeder, if applicable */ grp_try_feed (grp); /* finish, if done */ if (!grp->size && grp->flags & ETP_FLAG_DELAYED) return eio_finish (grp); else return 0; } static void eio_destroy (eio_req *req) { if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); EIO_DESTROY (req); } static int eio_finish (eio_req *req) { int res = EIO_FINISH (req); if (req->grp) { int res2; eio_req *grp = req->grp; /* unlink request */ if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; if (grp->grp_first == req) grp->grp_first = req->grp_next; res2 = grp_dec (grp); if (!res) res = res2; } eio_destroy (req); return res; } void eio_grp_cancel (eio_req *grp) { etp_grp_cancel (EIO_POOL, grp); } void eio_cancel (eio_req *req) { etp_cancel (EIO_POOL, req); } void eio_submit (eio_req *req) { etp_submit (EIO_POOL, req); } unsigned int eio_nreqs (void) { return etp_nreqs (EIO_POOL); } unsigned int eio_nready (void) { return etp_nready (EIO_POOL); } unsigned int eio_npending (void) { return etp_npending (EIO_POOL); } unsigned int ecb_cold eio_nthreads (void) { return etp_nthreads (EIO_POOL); } void ecb_cold eio_set_max_poll_time (double nseconds) { etp_set_max_poll_time (EIO_POOL, nseconds); } void ecb_cold eio_set_max_poll_reqs (unsigned int maxreqs) { etp_set_max_poll_reqs (EIO_POOL, maxreqs); } void ecb_cold eio_set_max_idle (unsigned int nthreads) { etp_set_max_idle (EIO_POOL, nthreads); } void ecb_cold eio_set_idle_timeout (unsigned int seconds) { etp_set_idle_timeout (EIO_POOL, seconds); } void ecb_cold eio_set_min_parallel (unsigned int nthreads) { etp_set_min_parallel (EIO_POOL, nthreads); } void ecb_cold eio_set_max_parallel (unsigned int nthreads) { etp_set_max_parallel (EIO_POOL, nthreads); } int eio_poll (void) { return etp_poll (EIO_POOL); } /*****************************************************************************/ /* work around various missing functions */ #ifndef HAVE_UTIMES # undef utimes # define utimes(path,times) eio__utimes (path, times) static int eio__utimes (const char *filename, const struct timeval times[2]) { if (times) { struct utimbuf buf; buf.actime = times[0].tv_sec; buf.modtime = times[1].tv_sec; return utime (filename, &buf); } else return utime (filename, 0); } #endif #ifndef HAVE_FUTIMES # undef futimes # define futimes(fd,times) eio__futimes (fd, times) static int eio__futimes (int fd, const struct timeval tv[2]) { errno = ENOSYS; return -1; } #endif #if !HAVE_FDATASYNC # undef fdatasync # define fdatasync(fd) fsync (fd) #endif static int eio__syncfs (int fd) { int res; #if HAVE_SYS_SYNCFS res = (int)syscall (__NR_syncfs, (int)(fd)); #else res = EIO_ENOSYS (); #endif if (res < 0 && errno == ENOSYS && fd >= 0) sync (); return res; } /* sync_file_range always needs emulation */ static int eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) { #if HAVE_SYNC_FILE_RANGE int res; if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER) { flags = 0 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0) | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0) | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); } res = sync_file_range (fd, offset, nbytes, flags); if (!res || errno != ENOSYS) return res; #endif /* even though we could play tricks with the flags, it's better to always * call fdatasync, as that matches the expectation of its users best */ return fdatasync (fd); } static int eio__fallocate (int fd, int mode, off_t offset, size_t len) { #if HAVE_LINUX_FALLOCATE return fallocate (fd, mode, offset, len); #else return EIO_ENOSYS (); #endif } #if !HAVE_READAHEAD # undef readahead # define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) static eio_ssize_t eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) { size_t todo = count; dBUF; while (todo > 0) { size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; pread (fd, eio_buf, len, offset); offset += len; todo -= len; } FUBd; /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */ /* but not for e.g. EIO or eof, so we also never fail */ return 0; } #endif /* sendfile always needs emulation */ static eio_ssize_t eio__sendfile (int ofd, int ifd, off_t offset, size_t count) { eio_ssize_t written = 0; eio_ssize_t res; if (!count) return 0; for (;;) { #ifdef __APPLE__ # undef HAVE_SENDFILE /* broken, as everything on os x */ #endif #if HAVE_SENDFILE # if __linux off_t soffset = offset; res = sendfile (ofd, ifd, &soffset, count); # elif __FreeBSD__ /* * Of course, the freebsd sendfile is a dire hack with no thoughts * wasted on making it similar to other I/O functions. */ off_t sbytes; res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); #if 0 /* according to the manpage, this is correct, but broken behaviour */ /* freebsd' sendfile will return 0 on success */ /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ /* not on e.g. EIO or EPIPE - sounds broken */ if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) res = sbytes; #endif /* according to source inspection, this is correct, and useful behaviour */ if (sbytes) res = sbytes; # elif defined __APPLE__ off_t sbytes = count; res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); /* according to the manpage, sbytes is always valid */ if (sbytes) res = sbytes; # elif __hpux res = sendfile (ofd, ifd, offset, count, 0, 0); # elif __solaris struct sendfilevec vec; size_t sbytes; vec.sfv_fd = ifd; vec.sfv_flag = 0; vec.sfv_off = offset; vec.sfv_len = count; res = sendfilev (ofd, &vec, 1, &sbytes); if (res < 0 && sbytes) res = sbytes; # endif #elif defined (_WIN32) && 0 /* does not work, just for documentation of what would need to be done */ /* actually, cannot be done like this, as TransmitFile changes the file offset, */ /* libeio guarantees that the file offset does not change, and windows */ /* has no way to get an independent handle to the same file description */ HANDLE h = TO_SOCKET (ifd); SetFilePointer (h, offset, 0, FILE_BEGIN); res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); #else res = EIO_ENOSYS (); #endif /* we assume sendfile can copy at least 128mb in one go */ if (res <= 128 * 1024 * 1024) { if (res > 0) written += res; if (written) return written; break; } else { /* if we requested more, then probably the kernel was lazy */ written += res; offset += res; count -= res; if (!count) return written; } } if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK /* BSDs */ #ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ || errno == ENOTSUP #endif #ifdef EOPNOTSUPP /* windows */ || errno == EOPNOTSUPP /* BSDs */ #endif #if __solaris || errno == EAFNOSUPPORT || errno == EPROTOTYPE #endif ) ) { /* emulate sendfile. this is a major pain in the ass */ dBUF; res = 0; while (count) { eio_ssize_t cnt; cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); if (cnt <= 0) { if (cnt && !res) res = -1; break; } cnt = write (ofd, eio_buf, cnt); if (cnt <= 0) { if (cnt && !res) res = -1; break; } offset += cnt; res += cnt; count -= cnt; } FUBd; } return res; } #ifdef PAGESIZE # define eio_pagesize() PAGESIZE #else static intptr_t eio_pagesize (void) { static intptr_t page; if (!page) page = sysconf (_SC_PAGESIZE); return page; } #endif static void eio_page_align (void **addr, size_t *length) { intptr_t mask = eio_pagesize () - 1; /* round down addr */ intptr_t adj = mask & (intptr_t)*addr; *addr = (void *)((intptr_t)*addr - adj); *length += adj; /* round up length */ *length = (*length + mask) & ~mask; } #if !_POSIX_MEMLOCK # define eio__mlockall(a) EIO_ENOSYS () #else static int eio__mlockall (int flags) { #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 extern int mallopt (int, int); mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ #endif if (EIO_MCL_CURRENT != MCL_CURRENT || EIO_MCL_FUTURE != MCL_FUTURE) { flags = 0 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); } return mlockall (flags); } #endif #if !_POSIX_MEMLOCK_RANGE # define eio__mlock(a,b) EIO_ENOSYS () #else static int eio__mlock (void *addr, size_t length) { eio_page_align (&addr, &length); return mlock (addr, length); } #endif #if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) # define eio__msync(a,b,c) EIO_ENOSYS () #else static int eio__msync (void *mem, size_t len, int flags) { eio_page_align (&mem, &len); if (EIO_MS_ASYNC != MS_SYNC || EIO_MS_INVALIDATE != MS_INVALIDATE || EIO_MS_SYNC != MS_SYNC) { flags = 0 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) | (flags & EIO_MS_SYNC ? MS_SYNC : 0); } return msync (mem, len, flags); } #endif static int eio__mtouch (eio_req *req) { void *mem = req->ptr2; size_t len = req->size; int flags = req->int1; eio_page_align (&mem, &len); { intptr_t addr = (intptr_t)mem; intptr_t end = addr + len; intptr_t page = eio_pagesize (); if (addr < end) if (flags & EIO_MT_MODIFY) /* modify */ do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req)); else do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req)); } return 0; } /*****************************************************************************/ /* requests implemented outside eio_execute, because they are so large */ static void eio__lseek (eio_req *req) { /* this usually gets optimised away completely, or your compiler sucks, */ /* or the whence constants really are not 0, 1, 2 */ int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET : req->int2 == EIO_SEEK_CUR ? SEEK_CUR : req->int2 == EIO_SEEK_END ? SEEK_END : req->int2; req->offs = lseek (req->int1, req->offs, whence); req->result = req->offs == (off_t)-1 ? -1 : 0; } /* result will always end up in tmpbuf, there is always space for adding a 0-byte */ static int eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { char *res; const char *rel = path; char *tmp1, *tmp2; #if SYMLOOP_MAX > 32 int symlinks = SYMLOOP_MAX; #else int symlinks = 32; #endif errno = EINVAL; if (!rel) return -1; errno = ENOENT; if (!*rel) return -1; res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3); #ifdef _WIN32 if (_access (rel, 4) != 0) return -1; symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0); errno = ENAMETOOLONG; if (symlinks >= PATH_MAX * 3) return -1; errno = EIO; if (symlinks <= 0) return -1; return symlinks; #else tmp1 = res + PATH_MAX; tmp2 = tmp1 + PATH_MAX; #if 0 /* disabled, the musl way to do things is just too racy */ #if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) /* on linux we may be able to ask the kernel */ { int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); if (fd >= 0) { sprintf (tmp1, "/proc/self/fd/%d", fd); req->result = readlink (tmp1, res, PATH_MAX); /* here we should probably stat the open file and the disk file, to make sure they still match */ close (fd); if (req->result > 0) goto done; } else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) return -1; } #endif #endif if (*rel != '/') { int len; errno = ENOENT; if (wd == EIO_INVALID_WD) return -1; if (wd == EIO_CWD) { if (!getcwd (res, PATH_MAX)) return -1; len = strlen (res); } else memcpy (res, wd->str, len = wd->len); if (res [1]) /* only use if not / */ res += len; } while (*rel) { eio_ssize_t len, linklen; const char *beg = rel; while (*rel && *rel != '/') ++rel; len = rel - beg; if (!len) /* skip slashes */ { ++rel; continue; } if (beg [0] == '.') { if (len == 1) continue; /* . - nop */ if (beg [1] == '.' && len == 2) { /* .. - back up one component, if possible */ while (res != tmpbuf->ptr) if (*--res == '/') break; continue; } } errno = ENAMETOOLONG; if (res + 1 + len + 1 >= tmp1) return -1; /* copy one component */ *res = '/'; memcpy (res + 1, beg, len); /* zero-terminate, for readlink */ res [len + 1] = 0; /* now check if it's a symlink */ linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX); if (linklen < 0) { if (errno != EINVAL) return -1; /* it's a normal directory. hopefully */ res += len + 1; } else { /* yay, it was a symlink - build new path in tmp2 */ int rellen = strlen (rel); errno = ENAMETOOLONG; if (linklen + 1 + rellen >= PATH_MAX) return -1; errno = ELOOP; if (!--symlinks) return -1; if (*tmp1 == '/') res = tmpbuf->ptr; /* symlink resolves to an absolute path */ /* we need to be careful, as rel might point into tmp2 already */ memmove (tmp2 + linklen + 1, rel, rellen + 1); tmp2 [linklen] = '/'; memcpy (tmp2, tmp1, linklen); rel = tmp2; } } /* special case for the lone root path */ if (res == tmpbuf->ptr) *res++ = '/'; return res - (char *)tmpbuf->ptr; #endif } static signed char eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) { return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ : a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; } #define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 #define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ #define EIO_SORT_FAST 60 /* when to only use insertion sort */ static void eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) { unsigned char bits [9 + sizeof (eio_ino_t) * 8]; unsigned char *bit = bits; assert (CHAR_BIT == 8); assert (sizeof (eio_dirent) * 8 < 256); assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ if (size <= EIO_SORT_FAST) return; /* first prepare an array of bits to test in our radix sort */ /* try to take endianness into account, as well as differences in eio_ino_t sizes */ /* inode_bits must contain all inodes ORed together */ /* which is used to skip bits that are 0 everywhere, which is very common */ { eio_ino_t endianness; int i, j; /* we store the byte offset of byte n into byte n of "endianness" */ for (i = 0; i < sizeof (eio_ino_t); ++i) ((unsigned char *)&endianness)[i] = i; *bit++ = 0; for (i = 0; i < sizeof (eio_ino_t); ++i) { /* shifting off the byte offsets out of "endianness" */ int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; endianness >>= 8; for (j = 0; j < 8; ++j) if (inode_bits & (((eio_ino_t)1) << (i * 8 + j))) *bit++ = offs + j; } for (j = 0; j < 8; ++j) if (score_bits & (1 << j)) *bit++ = offsetof (eio_dirent, score) * 8 + j; } /* now actually do the sorting (a variant of MSD radix sort) */ { eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base; eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end; unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8]; int stk_idx = 0; base_stk [stk_idx] = dents; end_stk [stk_idx] = dents + size; bit_stk [stk_idx] = bit - 1; do { base = base_stk [stk_idx]; end = end_stk [stk_idx]; bit = bit_stk [stk_idx]; for (;;) { unsigned char O = *bit >> 3; unsigned char M = 1 << (*bit & 7); eio_dirent *a = base; eio_dirent *b = end; if (b - a < EIO_SORT_CUTOFF) break; /* now bit-partition the array on the bit */ /* this ugly asymmetric loop seems to perform much better than typical */ /* partition algos found in the literature */ do if (!(((unsigned char *)a)[O] & M)) ++a; else if (!(((unsigned char *)--b)[O] & M)) { eio_dirent tmp = *a; *a = *b; *b = tmp; ++a; } while (b > a); /* next bit, or stop, if no bits left in this path */ if (!*--bit) break; base_stk [stk_idx] = a; end_stk [stk_idx] = end; bit_stk [stk_idx] = bit; ++stk_idx; end = a; } } while (stk_idx--); } } static void eio_dent_insertion_sort (eio_dirent *dents, int size) { /* first move the smallest element to the front, to act as a sentinel */ { int i; eio_dirent *min = dents; /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) if (EIO_DENT_CMP (dents [i], <, *min)) min = &dents [i]; /* swap elements 0 and j (minimum) */ { eio_dirent tmp = *dents; *dents = *min; *min = tmp; } } /* then do standard insertion sort, assuming that all elements are >= dents [0] */ { eio_dirent *i, *j; for (i = dents + 1; i < dents + size; ++i) { eio_dirent value = *i; for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) j [1] = j [0]; j [1] = value; } } } static void eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) { if (size <= 1) return; /* our insertion sort relies on size > 0 */ /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ eio_dent_radix_sort (dents, size, score_bits, inode_bits); /* use an insertion sort at the end, or for small arrays, */ /* as insertion sort is more efficient for small partitions */ eio_dent_insertion_sort (dents, size); } /* read a full directory */ static void eio__scandir (eio_req *req, etp_worker *self) { char *name, *names; int namesalloc = 4096 - sizeof (void *) * 4; int namesoffs = 0; int flags = req->int1; eio_dirent *dents = 0; int dentalloc = 128; int dentoffs = 0; eio_ino_t inode_bits = 0; #ifdef _WIN32 HANDLE dirp; WIN32_FIND_DATA entp; #else DIR *dirp; EIO_STRUCT_DIRENT *entp; #endif req->result = -1; if (!(flags & EIO_READDIR_DENTS)) flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); #ifdef _WIN32 { int len = strlen ((const char *)req->ptr1); char *path = malloc (MAX_PATH); const char *fmt; const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1); if (!len) fmt = "./*"; else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\') fmt = "%s*"; else fmt = "%s/*"; _snprintf (path, MAX_PATH, fmt, reqpath); dirp = FindFirstFile (path, &entp); free (path); if (dirp == INVALID_HANDLE_VALUE) { /* should steal _dosmaperr */ switch (GetLastError ()) { case ERROR_FILE_NOT_FOUND: req->result = 0; break; case ERROR_INVALID_NAME: case ERROR_PATH_NOT_FOUND: case ERROR_NO_MORE_FILES: errno = ENOENT; break; case ERROR_NOT_ENOUGH_MEMORY: errno = ENOMEM; break; default: errno = EINVAL; break; } return; } } #else #if HAVE_AT if (req->wd) { int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY); if (fd < 0) return; dirp = fdopendir (fd); if (!dirp) close (fd); } else dirp = opendir (req->ptr1); #else dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); #endif if (!dirp) return; #endif if (req->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; req->ptr2 = names = malloc (namesalloc); if (!names || (flags && !dents)) return; for (;;) { int done; #ifdef _WIN32 done = !dirp; #else errno = 0; entp = readdir (dirp); done = !entp; #endif if (done) { #ifndef _WIN32 int old_errno = errno; closedir (dirp); errno = old_errno; if (errno) break; #endif /* sort etc. */ req->int1 = flags; req->result = dentoffs; if (flags & EIO_READDIR_STAT_ORDER) eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); else if (flags & EIO_READDIR_DIRS_FIRST) if (flags & EIO_READDIR_FOUND_UNKNOWN) eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ else { /* in this case, all is known, and we just put dirs first and sort them */ eio_dirent *oth = dents + dentoffs; eio_dirent *dir = dents; /* now partition dirs to the front, and non-dirs to the back */ /* by walking from both sides and swapping if necessary */ while (oth > dir) { if (dir->type == EIO_DT_DIR) ++dir; else if ((--oth)->type == EIO_DT_DIR) { eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; ++dir; } } /* now sort the dirs only (dirs all have the same score) */ eio_dent_sort (dents, dir - dents, 0, inode_bits); } break; } /* now add the entry to our list(s) */ name = D_NAME (entp); /* skip . and .. entries */ if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) { int len = D_NAMLEN (entp) + 1; while (ecb_expect_false (namesoffs + len > namesalloc)) { namesalloc *= 2; req->ptr2 = names = realloc (names, namesalloc); if (!names) break; } memcpy (names + namesoffs, name, len); if (dents) { struct eio_dirent *ent; if (ecb_expect_false (dentoffs == dentalloc)) { dentalloc *= 2; req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); if (!dents) break; } ent = dents + dentoffs; ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ ent->namelen = len - 1; ent->inode = D_INO (entp); inode_bits |= ent->inode; switch (D_TYPE (entp)) { default: ent->type = EIO_DT_UNKNOWN; flags |= EIO_READDIR_FOUND_UNKNOWN; break; #ifdef DT_FIFO case DT_FIFO: ent->type = EIO_DT_FIFO; break; #endif #ifdef DT_CHR case DT_CHR: ent->type = EIO_DT_CHR; break; #endif #ifdef DT_MPC case DT_MPC: ent->type = EIO_DT_MPC; break; #endif #ifdef DT_DIR case DT_DIR: ent->type = EIO_DT_DIR; break; #endif #ifdef DT_NAM case DT_NAM: ent->type = EIO_DT_NAM; break; #endif #ifdef DT_BLK case DT_BLK: ent->type = EIO_DT_BLK; break; #endif #ifdef DT_MPB case DT_MPB: ent->type = EIO_DT_MPB; break; #endif #ifdef DT_REG case DT_REG: ent->type = EIO_DT_REG; break; #endif #ifdef DT_NWK case DT_NWK: ent->type = EIO_DT_NWK; break; #endif #ifdef DT_CMP case DT_CMP: ent->type = EIO_DT_CMP; break; #endif #ifdef DT_LNK case DT_LNK: ent->type = EIO_DT_LNK; break; #endif #ifdef DT_SOCK case DT_SOCK: ent->type = EIO_DT_SOCK; break; #endif #ifdef DT_DOOR case DT_DOOR: ent->type = EIO_DT_DOOR; break; #endif #ifdef DT_WHT case DT_WHT: ent->type = EIO_DT_WHT; break; #endif } ent->score = 7; if (flags & EIO_READDIR_DIRS_FIRST) { if (ent->type == EIO_DT_UNKNOWN) { if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ ent->score = 1; else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */ ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ } else if (ent->type == EIO_DT_DIR) ent->score = 0; } } namesoffs += len; ++dentoffs; } if (EIO_CANCELLED (req)) { errno = ECANCELED; break; } #ifdef _WIN32 if (!FindNextFile (dirp, &entp)) { FindClose (dirp); dirp = 0; } #endif } } /*****************************************************************************/ /* working directory stuff */ /* various deficiencies in the posix 2008 api force us to */ /* keep the absolute path in string form at all times */ /* fuck yeah. */ #if !HAVE_AT /* a bit like realpath, but usually faster because it doesn'T have to return */ /* an absolute or canonical path */ static const char * wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { if (!wd || *path == '/') return path; if (path [0] == '.' && !path [1]) return wd->str; { int l1 = wd->len; int l2 = strlen (path); char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2); memcpy (res, wd->str, l1); res [l1] = '/'; memcpy (res + l1 + 1, path, l2 + 1); return res; } } #endif static eio_wd eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path) { int fd; eio_wd res; int len = eio__realpath (tmpbuf, wd, path); if (len < 0) return EIO_INVALID_WD; #if HAVE_AT fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY); if (fd < 0) return EIO_INVALID_WD; #endif res = malloc (sizeof (*res) + len); /* one extra 0-byte */ #if HAVE_AT res->fd = fd; #endif res->len = len; memcpy (res->str, tmpbuf->ptr, len); res->str [len] = 0; return res; } eio_wd eio_wd_open_sync (eio_wd wd, const char *path) { struct etp_tmpbuf tmpbuf = { }; wd = eio__wd_open_sync (&tmpbuf, wd, path); free (tmpbuf.ptr); return wd; } void eio_wd_close_sync (eio_wd wd) { if (wd != EIO_INVALID_WD && wd != EIO_CWD) { #if HAVE_AT close (wd->fd); #endif free (wd); } } #if HAVE_AT /* they forgot these */ static int eio__truncateat (int dirfd, const char *path, off_t length) { int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC); int res; if (fd < 0) return fd; res = ftruncate (fd, length); close (fd); return res; } static int eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) { int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC); int res; if (fd < 0) return fd; res = fstatvfs (fd, buf); close (fd); return res; } #endif /*****************************************************************************/ #define ALLOC(len) \ if (!req->ptr2) \ { \ X_LOCK (EIO_POOL->wrklock); \ req->flags |= EIO_FLAG_PTR2_FREE; \ X_UNLOCK (EIO_POOL->wrklock); \ req->ptr2 = malloc (len); \ if (!req->ptr2) \ { \ errno = ENOMEM; \ req->result = -1; \ break; \ } \ } /*****************************************************************************/ int ecb_cold eio_init (void (*want_poll)(void), void (*done_poll)(void)) { eio_want_poll_cb = want_poll; eio_done_poll_cb = done_poll; return etp_init (EIO_POOL, 0, 0, 0); } ecb_inline void eio_api_destroy (eio_req *req) { free (req); } #define REQ(rtype) \ eio_req *req; \ \ req = (eio_req *)calloc (1, sizeof *req); \ if (!req) \ return 0; \ \ req->type = rtype; \ req->pri = pri; \ req->finish = cb; \ req->data = data; \ req->destroy = eio_api_destroy; #define SEND eio_submit (req); return req #define PATH \ req->flags |= EIO_FLAG_PTR1_FREE; \ req->ptr1 = strdup (path); \ if (!req->ptr1) \ { \ eio_api_destroy (req); \ return 0; \ } #define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)]) static void eio_execute (etp_worker *self, eio_req *req) { #if HAVE_AT int dirfd = -1; #else const char *path; #endif if (ecb_expect_false (EIO_CANCELLED (req))) { req->result = -1; req->errorno = ECANCELED; return; } if (ecb_expect_false (req->wd == EIO_INVALID_WD)) { req->result = -1; req->errorno = ENOENT; return; } if (req->type >= EIO_OPEN) { #if HAVE_AT dirfd = WD2FD (req->wd); #else path = wd_expand (&self->tmpbuf, req->wd, req->ptr1); #endif } switch (req->type) { case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1); req->result = req->wd == EIO_INVALID_WD ? -1 : 0; break; case EIO_WD_CLOSE: req->result = 0; eio_wd_close_sync (req->wd); break; case EIO_SEEK: eio__lseek (req); break; case EIO_READ: ALLOC (req->size); req->result = req->offs >= 0 ? pread (req->int1, req->ptr2, req->size, req->offs) : read (req->int1, req->ptr2, req->size); break; case EIO_WRITE: req->result = req->offs >= 0 ? pwrite (req->int1, req->ptr2, req->size, req->offs) : write (req->int1, req->ptr2, req->size); break; case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break; #if HAVE_AT case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break; case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */ req->result = req->wd && SINGLEDOT (req->ptr1) ? rmdir (req->wd->str) : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */ req->result = req->wd && SINGLEDOT (req->ptr1) ? rename (req->wd->str, req->ptr2) : renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break; case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; case EIO_READLINK: ALLOC (PATH_MAX); req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break; case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_UTIME: case EIO_FUTIME: { struct timespec ts[2]; struct timespec *times; if (req->nv1 != -1. || req->nv2 != -1.) { ts[0].tv_sec = req->nv1; ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9; ts[1].tv_sec = req->nv2; ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9; times = ts; } else times = 0; req->result = req->type == EIO_FUTIME ? futimens (req->int1, times) : utimensat (dirfd, req->ptr1, times, 0); } break; #else case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; case EIO_UNLINK: req->result = unlink (path ); break; case EIO_RMDIR: req->result = rmdir (path ); break; case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; case EIO_RENAME: req->result = rename (path , req->ptr2); break; case EIO_LINK: req->result = link (path , req->ptr2); break; case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; case EIO_READLINK: ALLOC (PATH_MAX); req->result = readlink (path, req->ptr2, PATH_MAX); break; case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_UTIME: case EIO_FUTIME: { struct timeval tv[2]; struct timeval *times; if (req->nv1 != -1. || req->nv2 != -1.) { tv[0].tv_sec = req->nv1; tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6; tv[1].tv_sec = req->nv2; tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6; times = tv; } else times = 0; req->result = req->type == EIO_FUTIME ? futimes (req->int1, times) : utimes (req->ptr1, times); } break; #endif case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1))) { ALLOC (req->result); memcpy (req->ptr2, self->tmpbuf.ptr, req->result); } break; case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; case EIO_CLOSE: req->result = close (req->int1); break; case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; case EIO_SYNC: req->result = 0; sync (); break; case EIO_FSYNC: req->result = fsync (req->int1); break; case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; case EIO_MTOUCH: req->result = eio__mtouch (req); break; case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; case EIO_READDIR: eio__scandir (req, self); break; case EIO_BUSY: #ifdef _WIN32 Sleep (req->nv1 * 1e3); #else { struct timeval tv; tv.tv_sec = req->nv1; tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; req->result = select (0, 0, 0, 0, &tv); } #endif break; #if 0 case EIO_GROUP: abort (); /* handled in eio_request */ #endif case EIO_NOP: req->result = 0; break; case EIO_CUSTOM: req->feed (req); break; default: req->result = EIO_ENOSYS (); break; } req->errorno = errno; } #ifndef EIO_NO_WRAPPERS eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data) { REQ (EIO_WD_OPEN); PATH; SEND; } eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data) { REQ (EIO_WD_CLOSE); req->wd = wd; SEND; } eio_req *eio_nop (int pri, eio_cb cb, void *data) { REQ (EIO_NOP); SEND; } eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data) { REQ (EIO_BUSY); req->nv1 = delay; SEND; } eio_req *eio_sync (int pri, eio_cb cb, void *data) { REQ (EIO_SYNC); SEND; } eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSYNC); req->int1 = fd; SEND; } eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; } eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FDATASYNC); req->int1 = fd; SEND; } eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_SYNCFS); req->int1 = fd; SEND; } eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) { REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; } eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; } eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; } eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) { REQ (EIO_MLOCKALL); req->int1 = flags; SEND; } eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) { REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; } eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_CLOSE); req->int1 = fd; SEND; } eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; } eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data) { REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND; } eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; } eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; } eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSTAT); req->int1 = fd; SEND; } eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FSTATVFS); req->int1 = fd; SEND; } eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) { REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; } eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; } eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; } eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) { REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND; } eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) { REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; } eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; } eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data) { REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; } eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; } eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND; } eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) { REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND; } static eio_req * eio__1path (int type, const char *path, int pri, eio_cb cb, void *data) { REQ (type); PATH; SEND; } eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_READLINK, path, pri, cb, data); } eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_REALPATH, path, pri, cb, data); } eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_STAT, path, pri, cb, data); } eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_LSTAT, path, pri, cb, data); } eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_STATVFS, path, pri, cb, data); } eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_UNLINK, path, pri, cb, data); } eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_RMDIR, path, pri, cb, data); } eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) { REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; } eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) { REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; } static eio_req * eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) { REQ (type); PATH; req->flags |= EIO_FLAG_PTR2_FREE; req->ptr2 = strdup (new_path); if (!req->ptr2) { eio_api_destroy (req); return 0; } SEND; } eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_LINK, path, new_path, pri, cb, data); } eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data); } eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) { return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); } eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) { REQ (EIO_CUSTOM); req->feed = execute; SEND; } #endif eio_req *eio_grp (eio_cb cb, void *data) { const int pri = EIO_PRI_MAX; REQ (EIO_GROUP); SEND; } #undef REQ #undef PATH #undef SEND /*****************************************************************************/ /* grp functions */ void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) { grp->int2 = limit; grp->feed = feed; grp_try_feed (grp); } void eio_grp_limit (eio_req *grp, int limit) { grp->int2 = limit; grp_try_feed (grp); } void eio_grp_add (eio_req *grp, eio_req *req) { assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); grp->flags |= ETP_FLAG_GROUPADD; ++grp->size; req->grp = grp; req->grp_prev = 0; req->grp_next = grp->grp_first; if (grp->grp_first) grp->grp_first->grp_prev = req; grp->grp_first = req; } /*****************************************************************************/ /* misc garbage */ eio_ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) { return eio__sendfile (ofd, ifd, offset, count); } tarantool_1.6.7.588.g76bbd9c/third_party/libeio/libeio.m40000664000000000000000000001440012634006617021450 0ustar rootrootdnl openbsd in it's neverending brokenness requires stdint.h for intptr_t, dnl but that header isn't very portable... AC_CHECK_HEADERS([stdint.h sys/syscall.h sys/prctl.h]) AC_SEARCH_LIBS( pthread_create, [pthread pthreads pthreadVC2], , [AC_MSG_ERROR(pthread functions not found)] ) AC_CACHE_CHECK(for utimes, ac_cv_utimes, [AC_LINK_IFELSE([AC_LANG_SOURCE([[ #include #include #include struct timeval tv[2]; int res; int main (void) { res = utimes ("/", tv); return 0; } ]])],ac_cv_utimes=yes,ac_cv_utimes=no)]) test $ac_cv_utimes = yes && AC_DEFINE(HAVE_UTIMES, 1, utimes(2) is available) AC_CACHE_CHECK(for futimes, ac_cv_futimes, [AC_LINK_IFELSE([AC_LANG_SOURCE([[ #include #include #include struct timeval tv[2]; int res; int fd; int main (void) { res = futimes (fd, tv); return 0; } ]])],ac_cv_futimes=yes,ac_cv_futimes=no)]) test $ac_cv_futimes = yes && AC_DEFINE(HAVE_FUTIMES, 1, futimes(2) is available) AC_CACHE_CHECK(for readahead, ac_cv_readahead, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { int fd = 0; size_t count = 2; ssize_t res; res = readahead (fd, 0, count); return 0; } ])],ac_cv_readahead=yes,ac_cv_readahead=no)]) test $ac_cv_readahead = yes && AC_DEFINE(HAVE_READAHEAD, 1, readahead(2) is available (linux)) AC_CACHE_CHECK(for fdatasync, ac_cv_fdatasync, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { int fd = 0; fdatasync (fd); return 0; } ])],ac_cv_fdatasync=yes,ac_cv_fdatasync=no)]) test $ac_cv_fdatasync = yes && AC_DEFINE(HAVE_FDATASYNC, 1, fdatasync(2) is available) AC_CACHE_CHECK(for sendfile, ac_cv_sendfile, [AC_LINK_IFELSE([AC_LANG_SOURCE([ # include #if __linux # include #elif __FreeBSD__ || defined __APPLE__ # include # include #elif __hpux # include #else # error unsupported architecture #endif int main (void) { int fd = 0; off_t offset = 1; size_t count = 2; ssize_t res; #if __linux res = sendfile (fd, fd, offset, count); #elif __FreeBSD__ res = sendfile (fd, fd, offset, count, 0, &offset, 0); #elif __hpux res = sendfile (fd, fd, offset, count, 0, 0); #endif return 0; } ])],ac_cv_sendfile=yes,ac_cv_sendfile=no)]) test $ac_cv_sendfile = yes && AC_DEFINE(HAVE_SENDFILE, 1, sendfile(2) is available and supported) AC_CACHE_CHECK(for sync_file_range, ac_cv_sync_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { int fd = 0; off64_t offset = 1; off64_t nbytes = 1; unsigned int flags = SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER; ssize_t res; res = sync_file_range (fd, offset, nbytes, flags); return 0; } ])],ac_cv_sync_file_range=yes,ac_cv_sync_file_range=no)]) test $ac_cv_sync_file_range = yes && AC_DEFINE(HAVE_SYNC_FILE_RANGE, 1, sync_file_range(2) is available) AC_CACHE_CHECK(for fallocate, ac_cv_linux_fallocate, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { int fd = 0; int mode = 0; off_t offset = 1; off_t len = 1; int res; res = fallocate (fd, mode, offset, len); return 0; } ])],ac_cv_linux_fallocate=yes,ac_cv_linux_fallocate=no)]) test $ac_cv_linux_fallocate = yes && AC_DEFINE(HAVE_LINUX_FALLOCATE, 1, fallocate(2) is available) AC_CACHE_CHECK(for sys_syncfs, ac_cv_sys_syncfs, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include #include int main (void) { int res = syscall (__NR_syncfs, (int)0); } ])],ac_cv_sys_syncfs=yes,ac_cv_sys_syncfs=no)]) test $ac_cv_sys_syncfs = yes && AC_DEFINE(HAVE_SYS_SYNCFS, 1, syscall(__NR_syncfs) is available) AC_CACHE_CHECK(for prctl_set_name, ac_cv_prctl_set_name, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { char name[] = "test123"; int res = prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0); } ])],ac_cv_prctl_set_name=yes,ac_cv_prctl_set_name=no)]) test $ac_cv_prctl_set_name = yes && AC_DEFINE(HAVE_PRCTL_SET_NAME, 1, prctl(PR_SET_NAME) is available) dnl ############################################################################# dnl # these checks exist for the benefit of IO::AIO dnl at least uclibc defines _POSIX_ADVISORY_INFO without *any* of the required dnl functionality actually being present. ugh. AC_CACHE_CHECK(for posix_madvise, ac_cv_posix_madvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { int res = posix_madvise ((void *)0, (size_t)0, POSIX_MADV_NORMAL); int a = POSIX_MADV_SEQUENTIAL; int b = POSIX_MADV_RANDOM; int c = POSIX_MADV_WILLNEED; int d = POSIX_MADV_DONTNEED; return 0; } ])],ac_cv_posix_madvise=yes,ac_cv_posix_madvise=no)]) test $ac_cv_posix_madvise = yes && AC_DEFINE(HAVE_POSIX_MADVISE, 1, posix_madvise(2) is available) AC_CACHE_CHECK(for posix_fadvise, ac_cv_posix_fadvise, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #define _XOPEN_SOURCE 600 #include int main (void) { int res = posix_fadvise ((int)0, (off_t)0, (off_t)0, POSIX_FADV_NORMAL); int a = POSIX_FADV_SEQUENTIAL; int b = POSIX_FADV_NOREUSE; int c = POSIX_FADV_RANDOM; int d = POSIX_FADV_WILLNEED; int e = POSIX_FADV_DONTNEED; return 0; } ])],ac_cv_posix_fadvise=yes,ac_cv_posix_fadvise=no)]) test $ac_cv_posix_fadvise = yes && AC_DEFINE(HAVE_POSIX_FADVISE, 1, posix_fadvise(2) is available) dnl lots of linux specifics AC_CHECK_HEADERS([linux/fs.h linux/fiemap.h]) AC_CACHE_CHECK([for splice, vmsplice and tee], ac_cv_linux_splice, [AC_LINK_IFELSE([AC_LANG_SOURCE([ #include int main (void) { ssize_t res; res = splice ((int)0, (loff_t)0, (int)0, (loff_t *)0, (size_t)0, SPLICE_F_MOVE | SPLICE_F_NONBLOCK | SPLICE_F_MORE); res = tee ((int)0, (int)0, (size_t)0, SPLICE_F_NONBLOCK); res = vmsplice ((int)0, (struct iovec *)0, 0, SPLICE_F_NONBLOCK | SPLICE_F_GIFT); return 0; } ])],ac_cv_linux_splice=yes,ac_cv_linux_splice=no)]) test $ac_cv_linux_splice = yes && AC_DEFINE(HAVE_LINUX_SPLICE, 1, splice/vmsplice/tee(2) are available) AC_CACHE_CHECK(for pipe2, ac_cv_pipe2, [AC_LINK_IFELSE([AC_LANG_SOURCE([[ #include #include int res; int main (void) { res = pipe2 (0, 0); return 0; } ]])],ac_cv_pipe2=yes,ac_cv_pipe2=no)]) test $ac_cv_pipe2 = yes && AC_DEFINE(HAVE_PIPE2, 1, pipe2(2) is available) tarantool_1.6.7.588.g76bbd9c/third_party/libeio/ltmain.sh0000664000000000000000000105152212634006617021572 0ustar rootroot # libtool (GNU libtool) 2.4.2 # Written by Gordon Matzigkeit , 1996 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, # 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. # This is free software; see the source for copying conditions. There is NO # warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # GNU Libtool is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # As a special exception to the GNU General Public License, # if you distribute this file as part of a program or library that # is built using GNU Libtool, you may include this file under the # same distribution terms that you use for the rest of that program. # # GNU Libtool is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with GNU Libtool; see the file COPYING. If not, a copy # can be downloaded from http://www.gnu.org/licenses/gpl.html, # or obtained by writing to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # Usage: $progname [OPTION]... [MODE-ARG]... # # Provide generalized library-building support services. # # --config show all configuration variables # --debug enable verbose shell tracing # -n, --dry-run display commands without modifying any files # --features display basic configuration information and exit # --mode=MODE use operation mode MODE # --preserve-dup-deps don't remove duplicate dependency libraries # --quiet, --silent don't print informational messages # --no-quiet, --no-silent # print informational messages (default) # --no-warn don't display warning messages # --tag=TAG use configuration variables from tag TAG # -v, --verbose print more informational messages than default # --no-verbose don't print the extra informational messages # --version print version information # -h, --help, --help-all print short, long, or detailed help message # # MODE must be one of the following: # # clean remove files from the build directory # compile compile a source file into a libtool object # execute automatically set library path, then run a program # finish complete the installation of libtool libraries # install install libraries or executables # link create a library or an executable # uninstall remove libraries from an installed directory # # MODE-ARGS vary depending on the MODE. When passed as first option, # `--mode=MODE' may be abbreviated as `MODE' or a unique abbreviation of that. # Try `$progname --help --mode=MODE' for a more detailed description of MODE. # # When reporting a bug, please describe a test case to reproduce it and # include the following information: # # host-triplet: $host # shell: $SHELL # compiler: $LTCC # compiler flags: $LTCFLAGS # linker: $LD (gnu? $with_gnu_ld) # $progname: (GNU libtool) 2.4.2 # automake: $automake_version # autoconf: $autoconf_version # # Report bugs to . # GNU libtool home page: . # General help using GNU software: . PROGRAM=libtool PACKAGE=libtool VERSION=2.4.2 TIMESTAMP="" package_revision=1.3337 # Be Bourne compatible if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then emulate sh NULLCMD=: # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which # is contrary to our usage. Disable this feature. alias -g '${1+"$@"}'='"$@"' setopt NO_GLOB_SUBST else case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac fi BIN_SH=xpg4; export BIN_SH # for Tru64 DUALCASE=1; export DUALCASE # for MKS sh # A function that is used when there is no print builtin or printf. func_fallback_echo () { eval 'cat <<_LTECHO_EOF $1 _LTECHO_EOF' } # NLS nuisances: We save the old values to restore during execute mode. lt_user_locale= lt_safe_locale= for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES do eval "if test \"\${$lt_var+set}\" = set; then save_$lt_var=\$$lt_var $lt_var=C export $lt_var lt_user_locale=\"$lt_var=\\\$save_\$lt_var; \$lt_user_locale\" lt_safe_locale=\"$lt_var=C; \$lt_safe_locale\" fi" done LC_ALL=C LANGUAGE=C export LANGUAGE LC_ALL $lt_unset CDPATH # Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh # is ksh but when the shell is invoked as "sh" and the current value of # the _XPG environment variable is not equal to 1 (one), the special # positional parameter $0, within a function call, is the name of the # function. progpath="$0" : ${CP="cp -f"} test "${ECHO+set}" = set || ECHO=${as_echo-'printf %s\n'} : ${MAKE="make"} : ${MKDIR="mkdir"} : ${MV="mv -f"} : ${RM="rm -f"} : ${SHELL="${CONFIG_SHELL-/bin/sh}"} : ${Xsed="$SED -e 1s/^X//"} # Global variables: EXIT_SUCCESS=0 EXIT_FAILURE=1 EXIT_MISMATCH=63 # $? = 63 is used to indicate version mismatch to missing. EXIT_SKIP=77 # $? = 77 is used to indicate a skipped test to automake. exit_status=$EXIT_SUCCESS # Make sure IFS has a sensible default lt_nl=' ' IFS=" $lt_nl" dirname="s,/[^/]*$,," basename="s,^.*/,," # func_dirname file append nondir_replacement # Compute the dirname of FILE. If nonempty, add APPEND to the result, # otherwise set result to NONDIR_REPLACEMENT. func_dirname () { func_dirname_result=`$ECHO "${1}" | $SED "$dirname"` if test "X$func_dirname_result" = "X${1}"; then func_dirname_result="${3}" else func_dirname_result="$func_dirname_result${2}" fi } # func_dirname may be replaced by extended shell implementation # func_basename file func_basename () { func_basename_result=`$ECHO "${1}" | $SED "$basename"` } # func_basename may be replaced by extended shell implementation # func_dirname_and_basename file append nondir_replacement # perform func_basename and func_dirname in a single function # call: # dirname: Compute the dirname of FILE. If nonempty, # add APPEND to the result, otherwise set result # to NONDIR_REPLACEMENT. # value returned in "$func_dirname_result" # basename: Compute filename of FILE. # value retuned in "$func_basename_result" # Implementation must be kept synchronized with func_dirname # and func_basename. For efficiency, we do not delegate to # those functions but instead duplicate the functionality here. func_dirname_and_basename () { # Extract subdirectory from the argument. func_dirname_result=`$ECHO "${1}" | $SED -e "$dirname"` if test "X$func_dirname_result" = "X${1}"; then func_dirname_result="${3}" else func_dirname_result="$func_dirname_result${2}" fi func_basename_result=`$ECHO "${1}" | $SED -e "$basename"` } # func_dirname_and_basename may be replaced by extended shell implementation # func_stripname prefix suffix name # strip PREFIX and SUFFIX off of NAME. # PREFIX and SUFFIX must not contain globbing or regex special # characters, hashes, percent signs, but SUFFIX may contain a leading # dot (in which case that matches only a dot). # func_strip_suffix prefix name func_stripname () { case ${2} in .*) func_stripname_result=`$ECHO "${3}" | $SED "s%^${1}%%; s%\\\\${2}\$%%"`;; *) func_stripname_result=`$ECHO "${3}" | $SED "s%^${1}%%; s%${2}\$%%"`;; esac } # func_stripname may be replaced by extended shell implementation # These SED scripts presuppose an absolute path with a trailing slash. pathcar='s,^/\([^/]*\).*$,\1,' pathcdr='s,^/[^/]*,,' removedotparts=':dotsl s@/\./@/@g t dotsl s,/\.$,/,' collapseslashes='s@/\{1,\}@/@g' finalslash='s,/*$,/,' # func_normal_abspath PATH # Remove doubled-up and trailing slashes, "." path components, # and cancel out any ".." path components in PATH after making # it an absolute path. # value returned in "$func_normal_abspath_result" func_normal_abspath () { # Start from root dir and reassemble the path. func_normal_abspath_result= func_normal_abspath_tpath=$1 func_normal_abspath_altnamespace= case $func_normal_abspath_tpath in "") # Empty path, that just means $cwd. func_stripname '' '/' "`pwd`" func_normal_abspath_result=$func_stripname_result return ;; # The next three entries are used to spot a run of precisely # two leading slashes without using negated character classes; # we take advantage of case's first-match behaviour. ///*) # Unusual form of absolute path, do nothing. ;; //*) # Not necessarily an ordinary path; POSIX reserves leading '//' # and for example Cygwin uses it to access remote file shares # over CIFS/SMB, so we conserve a leading double slash if found. func_normal_abspath_altnamespace=/ ;; /*) # Absolute path, do nothing. ;; *) # Relative path, prepend $cwd. func_normal_abspath_tpath=`pwd`/$func_normal_abspath_tpath ;; esac # Cancel out all the simple stuff to save iterations. We also want # the path to end with a slash for ease of parsing, so make sure # there is one (and only one) here. func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$removedotparts" -e "$collapseslashes" -e "$finalslash"` while :; do # Processed it all yet? if test "$func_normal_abspath_tpath" = / ; then # If we ascended to the root using ".." the result may be empty now. if test -z "$func_normal_abspath_result" ; then func_normal_abspath_result=/ fi break fi func_normal_abspath_tcomponent=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$pathcar"` func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$pathcdr"` # Figure out what to do with it case $func_normal_abspath_tcomponent in "") # Trailing empty path component, ignore it. ;; ..) # Parent dir; strip last assembled component from result. func_dirname "$func_normal_abspath_result" func_normal_abspath_result=$func_dirname_result ;; *) # Actual path component, append it. func_normal_abspath_result=$func_normal_abspath_result/$func_normal_abspath_tcomponent ;; esac done # Restore leading double-slash if one was found on entry. func_normal_abspath_result=$func_normal_abspath_altnamespace$func_normal_abspath_result } # func_relative_path SRCDIR DSTDIR # generates a relative path from SRCDIR to DSTDIR, with a trailing # slash if non-empty, suitable for immediately appending a filename # without needing to append a separator. # value returned in "$func_relative_path_result" func_relative_path () { func_relative_path_result= func_normal_abspath "$1" func_relative_path_tlibdir=$func_normal_abspath_result func_normal_abspath "$2" func_relative_path_tbindir=$func_normal_abspath_result # Ascend the tree starting from libdir while :; do # check if we have found a prefix of bindir case $func_relative_path_tbindir in $func_relative_path_tlibdir) # found an exact match func_relative_path_tcancelled= break ;; $func_relative_path_tlibdir*) # found a matching prefix func_stripname "$func_relative_path_tlibdir" '' "$func_relative_path_tbindir" func_relative_path_tcancelled=$func_stripname_result if test -z "$func_relative_path_result"; then func_relative_path_result=. fi break ;; *) func_dirname $func_relative_path_tlibdir func_relative_path_tlibdir=${func_dirname_result} if test "x$func_relative_path_tlibdir" = x ; then # Have to descend all the way to the root! func_relative_path_result=../$func_relative_path_result func_relative_path_tcancelled=$func_relative_path_tbindir break fi func_relative_path_result=../$func_relative_path_result ;; esac done # Now calculate path; take care to avoid doubling-up slashes. func_stripname '' '/' "$func_relative_path_result" func_relative_path_result=$func_stripname_result func_stripname '/' '/' "$func_relative_path_tcancelled" if test "x$func_stripname_result" != x ; then func_relative_path_result=${func_relative_path_result}/${func_stripname_result} fi # Normalisation. If bindir is libdir, return empty string, # else relative path ending with a slash; either way, target # file name can be directly appended. if test ! -z "$func_relative_path_result"; then func_stripname './' '' "$func_relative_path_result/" func_relative_path_result=$func_stripname_result fi } # The name of this program: func_dirname_and_basename "$progpath" progname=$func_basename_result # Make sure we have an absolute path for reexecution: case $progpath in [\\/]*|[A-Za-z]:\\*) ;; *[\\/]*) progdir=$func_dirname_result progdir=`cd "$progdir" && pwd` progpath="$progdir/$progname" ;; *) save_IFS="$IFS" IFS=${PATH_SEPARATOR-:} for progdir in $PATH; do IFS="$save_IFS" test -x "$progdir/$progname" && break done IFS="$save_IFS" test -n "$progdir" || progdir=`pwd` progpath="$progdir/$progname" ;; esac # Sed substitution that helps us do robust quoting. It backslashifies # metacharacters that are still active within double-quoted strings. Xsed="${SED}"' -e 1s/^X//' sed_quote_subst='s/\([`"$\\]\)/\\\1/g' # Same as above, but do not quote variable references. double_quote_subst='s/\(["`\\]\)/\\\1/g' # Sed substitution that turns a string into a regex matching for the # string literally. sed_make_literal_regex='s,[].[^$\\*\/],\\&,g' # Sed substitution that converts a w32 file name or path # which contains forward slashes, into one that contains # (escaped) backslashes. A very naive implementation. lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' # Re-`\' parameter expansions in output of double_quote_subst that were # `\'-ed in input to the same. If an odd number of `\' preceded a '$' # in input to double_quote_subst, that '$' was protected from expansion. # Since each input `\' is now two `\'s, look for any number of runs of # four `\'s followed by two `\'s and then a '$'. `\' that '$'. bs='\\' bs2='\\\\' bs4='\\\\\\\\' dollar='\$' sed_double_backslash="\ s/$bs4/&\\ /g s/^$bs2$dollar/$bs&/ s/\\([^$bs]\\)$bs2$dollar/\\1$bs2$bs$dollar/g s/\n//g" # Standard options: opt_dry_run=false opt_help=false opt_quiet=false opt_verbose=false opt_warning=: # func_echo arg... # Echo program name prefixed message, along with the current mode # name if it has been set yet. func_echo () { $ECHO "$progname: ${opt_mode+$opt_mode: }$*" } # func_verbose arg... # Echo program name prefixed message in verbose mode only. func_verbose () { $opt_verbose && func_echo ${1+"$@"} # A bug in bash halts the script if the last line of a function # fails when set -e is in force, so we need another command to # work around that: : } # func_echo_all arg... # Invoke $ECHO with all args, space-separated. func_echo_all () { $ECHO "$*" } # func_error arg... # Echo program name prefixed message to standard error. func_error () { $ECHO "$progname: ${opt_mode+$opt_mode: }"${1+"$@"} 1>&2 } # func_warning arg... # Echo program name prefixed warning message to standard error. func_warning () { $opt_warning && $ECHO "$progname: ${opt_mode+$opt_mode: }warning: "${1+"$@"} 1>&2 # bash bug again: : } # func_fatal_error arg... # Echo program name prefixed message to standard error, and exit. func_fatal_error () { func_error ${1+"$@"} exit $EXIT_FAILURE } # func_fatal_help arg... # Echo program name prefixed message to standard error, followed by # a help hint, and exit. func_fatal_help () { func_error ${1+"$@"} func_fatal_error "$help" } help="Try \`$progname --help' for more information." ## default # func_grep expression filename # Check whether EXPRESSION matches any line of FILENAME, without output. func_grep () { $GREP "$1" "$2" >/dev/null 2>&1 } # func_mkdir_p directory-path # Make sure the entire path to DIRECTORY-PATH is available. func_mkdir_p () { my_directory_path="$1" my_dir_list= if test -n "$my_directory_path" && test "$opt_dry_run" != ":"; then # Protect directory names starting with `-' case $my_directory_path in -*) my_directory_path="./$my_directory_path" ;; esac # While some portion of DIR does not yet exist... while test ! -d "$my_directory_path"; do # ...make a list in topmost first order. Use a colon delimited # list incase some portion of path contains whitespace. my_dir_list="$my_directory_path:$my_dir_list" # If the last portion added has no slash in it, the list is done case $my_directory_path in */*) ;; *) break ;; esac # ...otherwise throw away the child directory and loop my_directory_path=`$ECHO "$my_directory_path" | $SED -e "$dirname"` done my_dir_list=`$ECHO "$my_dir_list" | $SED 's,:*$,,'` save_mkdir_p_IFS="$IFS"; IFS=':' for my_dir in $my_dir_list; do IFS="$save_mkdir_p_IFS" # mkdir can fail with a `File exist' error if two processes # try to create one of the directories concurrently. Don't # stop in that case! $MKDIR "$my_dir" 2>/dev/null || : done IFS="$save_mkdir_p_IFS" # Bail out if we (or some other process) failed to create a directory. test -d "$my_directory_path" || \ func_fatal_error "Failed to create \`$1'" fi } # func_mktempdir [string] # Make a temporary directory that won't clash with other running # libtool processes, and avoids race conditions if possible. If # given, STRING is the basename for that directory. func_mktempdir () { my_template="${TMPDIR-/tmp}/${1-$progname}" if test "$opt_dry_run" = ":"; then # Return a directory name, but don't create it in dry-run mode my_tmpdir="${my_template}-$$" else # If mktemp works, use that first and foremost my_tmpdir=`mktemp -d "${my_template}-XXXXXXXX" 2>/dev/null` if test ! -d "$my_tmpdir"; then # Failing that, at least try and use $RANDOM to avoid a race my_tmpdir="${my_template}-${RANDOM-0}$$" save_mktempdir_umask=`umask` umask 0077 $MKDIR "$my_tmpdir" umask $save_mktempdir_umask fi # If we're not in dry-run mode, bomb out on failure test -d "$my_tmpdir" || \ func_fatal_error "cannot create temporary directory \`$my_tmpdir'" fi $ECHO "$my_tmpdir" } # func_quote_for_eval arg # Aesthetically quote ARG to be evaled later. # This function returns two values: FUNC_QUOTE_FOR_EVAL_RESULT # is double-quoted, suitable for a subsequent eval, whereas # FUNC_QUOTE_FOR_EVAL_UNQUOTED_RESULT has merely all characters # which are still active within double quotes backslashified. func_quote_for_eval () { case $1 in *[\\\`\"\$]*) func_quote_for_eval_unquoted_result=`$ECHO "$1" | $SED "$sed_quote_subst"` ;; *) func_quote_for_eval_unquoted_result="$1" ;; esac case $func_quote_for_eval_unquoted_result in # Double-quote args containing shell metacharacters to delay # word splitting, command substitution and and variable # expansion for a subsequent eval. # Many Bourne shells cannot handle close brackets correctly # in scan sets, so we specify it separately. *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*|"") func_quote_for_eval_result="\"$func_quote_for_eval_unquoted_result\"" ;; *) func_quote_for_eval_result="$func_quote_for_eval_unquoted_result" esac } # func_quote_for_expand arg # Aesthetically quote ARG to be evaled later; same as above, # but do not quote variable references. func_quote_for_expand () { case $1 in *[\\\`\"]*) my_arg=`$ECHO "$1" | $SED \ -e "$double_quote_subst" -e "$sed_double_backslash"` ;; *) my_arg="$1" ;; esac case $my_arg in # Double-quote args containing shell metacharacters to delay # word splitting and command substitution for a subsequent eval. # Many Bourne shells cannot handle close brackets correctly # in scan sets, so we specify it separately. *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*|"") my_arg="\"$my_arg\"" ;; esac func_quote_for_expand_result="$my_arg" } # func_show_eval cmd [fail_exp] # Unless opt_silent is true, then output CMD. Then, if opt_dryrun is # not true, evaluate CMD. If the evaluation of CMD fails, and FAIL_EXP # is given, then evaluate it. func_show_eval () { my_cmd="$1" my_fail_exp="${2-:}" ${opt_silent-false} || { func_quote_for_expand "$my_cmd" eval "func_echo $func_quote_for_expand_result" } if ${opt_dry_run-false}; then :; else eval "$my_cmd" my_status=$? if test "$my_status" -eq 0; then :; else eval "(exit $my_status); $my_fail_exp" fi fi } # func_show_eval_locale cmd [fail_exp] # Unless opt_silent is true, then output CMD. Then, if opt_dryrun is # not true, evaluate CMD. If the evaluation of CMD fails, and FAIL_EXP # is given, then evaluate it. Use the saved locale for evaluation. func_show_eval_locale () { my_cmd="$1" my_fail_exp="${2-:}" ${opt_silent-false} || { func_quote_for_expand "$my_cmd" eval "func_echo $func_quote_for_expand_result" } if ${opt_dry_run-false}; then :; else eval "$lt_user_locale $my_cmd" my_status=$? eval "$lt_safe_locale" if test "$my_status" -eq 0; then :; else eval "(exit $my_status); $my_fail_exp" fi fi } # func_tr_sh # Turn $1 into a string suitable for a shell variable name. # Result is stored in $func_tr_sh_result. All characters # not in the set a-zA-Z0-9_ are replaced with '_'. Further, # if $1 begins with a digit, a '_' is prepended as well. func_tr_sh () { case $1 in [0-9]* | *[!a-zA-Z0-9_]*) func_tr_sh_result=`$ECHO "$1" | $SED 's/^\([0-9]\)/_\1/; s/[^a-zA-Z0-9_]/_/g'` ;; * ) func_tr_sh_result=$1 ;; esac } # func_version # Echo version message to standard output and exit. func_version () { $opt_debug $SED -n '/(C)/!b go :more /\./!{ N s/\n# / / b more } :go /^# '$PROGRAM' (GNU /,/# warranty; / { s/^# // s/^# *$// s/\((C)\)[ 0-9,-]*\( [1-9][0-9]*\)/\1\2/ p }' < "$progpath" exit $? } # func_usage # Echo short help message to standard output and exit. func_usage () { $opt_debug $SED -n '/^# Usage:/,/^# *.*--help/ { s/^# // s/^# *$// s/\$progname/'$progname'/ p }' < "$progpath" echo $ECHO "run \`$progname --help | more' for full usage" exit $? } # func_help [NOEXIT] # Echo long help message to standard output and exit, # unless 'noexit' is passed as argument. func_help () { $opt_debug $SED -n '/^# Usage:/,/# Report bugs to/ { :print s/^# // s/^# *$// s*\$progname*'$progname'* s*\$host*'"$host"'* s*\$SHELL*'"$SHELL"'* s*\$LTCC*'"$LTCC"'* s*\$LTCFLAGS*'"$LTCFLAGS"'* s*\$LD*'"$LD"'* s/\$with_gnu_ld/'"$with_gnu_ld"'/ s/\$automake_version/'"`(${AUTOMAKE-automake} --version) 2>/dev/null |$SED 1q`"'/ s/\$autoconf_version/'"`(${AUTOCONF-autoconf} --version) 2>/dev/null |$SED 1q`"'/ p d } /^# .* home page:/b print /^# General help using/b print ' < "$progpath" ret=$? if test -z "$1"; then exit $ret fi } # func_missing_arg argname # Echo program name prefixed message to standard error and set global # exit_cmd. func_missing_arg () { $opt_debug func_error "missing argument for $1." exit_cmd=exit } # func_split_short_opt shortopt # Set func_split_short_opt_name and func_split_short_opt_arg shell # variables after splitting SHORTOPT after the 2nd character. func_split_short_opt () { my_sed_short_opt='1s/^\(..\).*$/\1/;q' my_sed_short_rest='1s/^..\(.*\)$/\1/;q' func_split_short_opt_name=`$ECHO "$1" | $SED "$my_sed_short_opt"` func_split_short_opt_arg=`$ECHO "$1" | $SED "$my_sed_short_rest"` } # func_split_short_opt may be replaced by extended shell implementation # func_split_long_opt longopt # Set func_split_long_opt_name and func_split_long_opt_arg shell # variables after splitting LONGOPT at the `=' sign. func_split_long_opt () { my_sed_long_opt='1s/^\(--[^=]*\)=.*/\1/;q' my_sed_long_arg='1s/^--[^=]*=//' func_split_long_opt_name=`$ECHO "$1" | $SED "$my_sed_long_opt"` func_split_long_opt_arg=`$ECHO "$1" | $SED "$my_sed_long_arg"` } # func_split_long_opt may be replaced by extended shell implementation exit_cmd=: magic="%%%MAGIC variable%%%" magic_exe="%%%MAGIC EXE variable%%%" # Global variables. nonopt= preserve_args= lo2o="s/\\.lo\$/.${objext}/" o2lo="s/\\.${objext}\$/.lo/" extracted_archives= extracted_serial=0 # If this variable is set in any of the actions, the command in it # will be execed at the end. This prevents here-documents from being # left over by shells. exec_cmd= # func_append var value # Append VALUE to the end of shell variable VAR. func_append () { eval "${1}=\$${1}\${2}" } # func_append may be replaced by extended shell implementation # func_append_quoted var value # Quote VALUE and append to the end of shell variable VAR, separated # by a space. func_append_quoted () { func_quote_for_eval "${2}" eval "${1}=\$${1}\\ \$func_quote_for_eval_result" } # func_append_quoted may be replaced by extended shell implementation # func_arith arithmetic-term... func_arith () { func_arith_result=`expr "${@}"` } # func_arith may be replaced by extended shell implementation # func_len string # STRING may not start with a hyphen. func_len () { func_len_result=`expr "${1}" : ".*" 2>/dev/null || echo $max_cmd_len` } # func_len may be replaced by extended shell implementation # func_lo2o object func_lo2o () { func_lo2o_result=`$ECHO "${1}" | $SED "$lo2o"` } # func_lo2o may be replaced by extended shell implementation # func_xform libobj-or-source func_xform () { func_xform_result=`$ECHO "${1}" | $SED 's/\.[^.]*$/.lo/'` } # func_xform may be replaced by extended shell implementation # func_fatal_configuration arg... # Echo program name prefixed message to standard error, followed by # a configuration failure hint, and exit. func_fatal_configuration () { func_error ${1+"$@"} func_error "See the $PACKAGE documentation for more information." func_fatal_error "Fatal configuration error." } # func_config # Display the configuration for all the tags in this script. func_config () { re_begincf='^# ### BEGIN LIBTOOL' re_endcf='^# ### END LIBTOOL' # Default configuration. $SED "1,/$re_begincf CONFIG/d;/$re_endcf CONFIG/,\$d" < "$progpath" # Now print the configurations for the tags. for tagname in $taglist; do $SED -n "/$re_begincf TAG CONFIG: $tagname\$/,/$re_endcf TAG CONFIG: $tagname\$/p" < "$progpath" done exit $? } # func_features # Display the features supported by this script. func_features () { echo "host: $host" if test "$build_libtool_libs" = yes; then echo "enable shared libraries" else echo "disable shared libraries" fi if test "$build_old_libs" = yes; then echo "enable static libraries" else echo "disable static libraries" fi exit $? } # func_enable_tag tagname # Verify that TAGNAME is valid, and either flag an error and exit, or # enable the TAGNAME tag. We also add TAGNAME to the global $taglist # variable here. func_enable_tag () { # Global variable: tagname="$1" re_begincf="^# ### BEGIN LIBTOOL TAG CONFIG: $tagname\$" re_endcf="^# ### END LIBTOOL TAG CONFIG: $tagname\$" sed_extractcf="/$re_begincf/,/$re_endcf/p" # Validate tagname. case $tagname in *[!-_A-Za-z0-9,/]*) func_fatal_error "invalid tag name: $tagname" ;; esac # Don't test for the "default" C tag, as we know it's # there but not specially marked. case $tagname in CC) ;; *) if $GREP "$re_begincf" "$progpath" >/dev/null 2>&1; then taglist="$taglist $tagname" # Evaluate the configuration. Be careful to quote the path # and the sed script, to avoid splitting on whitespace, but # also don't use non-portable quotes within backquotes within # quotes we have to do it in 2 steps: extractedcf=`$SED -n -e "$sed_extractcf" < "$progpath"` eval "$extractedcf" else func_error "ignoring unknown tag $tagname" fi ;; esac } # func_check_version_match # Ensure that we are using m4 macros, and libtool script from the same # release of libtool. func_check_version_match () { if test "$package_revision" != "$macro_revision"; then if test "$VERSION" != "$macro_version"; then if test -z "$macro_version"; then cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, but the $progname: definition of this LT_INIT comes from an older release. $progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION $progname: and run autoconf again. _LT_EOF else cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, but the $progname: definition of this LT_INIT comes from $PACKAGE $macro_version. $progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION $progname: and run autoconf again. _LT_EOF fi else cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, revision $package_revision, $progname: but the definition of this LT_INIT comes from revision $macro_revision. $progname: You should recreate aclocal.m4 with macros from revision $package_revision $progname: of $PACKAGE $VERSION and run autoconf again. _LT_EOF fi exit $EXIT_MISMATCH fi } # Shorthand for --mode=foo, only valid as the first argument case $1 in clean|clea|cle|cl) shift; set dummy --mode clean ${1+"$@"}; shift ;; compile|compil|compi|comp|com|co|c) shift; set dummy --mode compile ${1+"$@"}; shift ;; execute|execut|execu|exec|exe|ex|e) shift; set dummy --mode execute ${1+"$@"}; shift ;; finish|finis|fini|fin|fi|f) shift; set dummy --mode finish ${1+"$@"}; shift ;; install|instal|insta|inst|ins|in|i) shift; set dummy --mode install ${1+"$@"}; shift ;; link|lin|li|l) shift; set dummy --mode link ${1+"$@"}; shift ;; uninstall|uninstal|uninsta|uninst|unins|unin|uni|un|u) shift; set dummy --mode uninstall ${1+"$@"}; shift ;; esac # Option defaults: opt_debug=: opt_dry_run=false opt_config=false opt_preserve_dup_deps=false opt_features=false opt_finish=false opt_help=false opt_help_all=false opt_silent=: opt_warning=: opt_verbose=: opt_silent=false opt_verbose=false # Parse options once, thoroughly. This comes as soon as possible in the # script to make things like `--version' happen as quickly as we can. { # this just eases exit handling while test $# -gt 0; do opt="$1" shift case $opt in --debug|-x) opt_debug='set -x' func_echo "enabling shell trace mode" $opt_debug ;; --dry-run|--dryrun|-n) opt_dry_run=: ;; --config) opt_config=: func_config ;; --dlopen|-dlopen) optarg="$1" opt_dlopen="${opt_dlopen+$opt_dlopen }$optarg" shift ;; --preserve-dup-deps) opt_preserve_dup_deps=: ;; --features) opt_features=: func_features ;; --finish) opt_finish=: set dummy --mode finish ${1+"$@"}; shift ;; --help) opt_help=: ;; --help-all) opt_help_all=: opt_help=': help-all' ;; --mode) test $# = 0 && func_missing_arg $opt && break optarg="$1" opt_mode="$optarg" case $optarg in # Valid mode arguments: clean|compile|execute|finish|install|link|relink|uninstall) ;; # Catch anything else as an error *) func_error "invalid argument for $opt" exit_cmd=exit break ;; esac shift ;; --no-silent|--no-quiet) opt_silent=false func_append preserve_args " $opt" ;; --no-warning|--no-warn) opt_warning=false func_append preserve_args " $opt" ;; --no-verbose) opt_verbose=false func_append preserve_args " $opt" ;; --silent|--quiet) opt_silent=: func_append preserve_args " $opt" opt_verbose=false ;; --verbose|-v) opt_verbose=: func_append preserve_args " $opt" opt_silent=false ;; --tag) test $# = 0 && func_missing_arg $opt && break optarg="$1" opt_tag="$optarg" func_append preserve_args " $opt $optarg" func_enable_tag "$optarg" shift ;; -\?|-h) func_usage ;; --help) func_help ;; --version) func_version ;; # Separate optargs to long options: --*=*) func_split_long_opt "$opt" set dummy "$func_split_long_opt_name" "$func_split_long_opt_arg" ${1+"$@"} shift ;; # Separate non-argument short options: -\?*|-h*|-n*|-v*) func_split_short_opt "$opt" set dummy "$func_split_short_opt_name" "-$func_split_short_opt_arg" ${1+"$@"} shift ;; --) break ;; -*) func_fatal_help "unrecognized option \`$opt'" ;; *) set dummy "$opt" ${1+"$@"}; shift; break ;; esac done # Validate options: # save first non-option argument if test "$#" -gt 0; then nonopt="$opt" shift fi # preserve --debug test "$opt_debug" = : || func_append preserve_args " --debug" case $host in *cygwin* | *mingw* | *pw32* | *cegcc*) # don't eliminate duplications in $postdeps and $predeps opt_duplicate_compiler_generated_deps=: ;; *) opt_duplicate_compiler_generated_deps=$opt_preserve_dup_deps ;; esac $opt_help || { # Sanity checks first: func_check_version_match if test "$build_libtool_libs" != yes && test "$build_old_libs" != yes; then func_fatal_configuration "not configured to build any kind of library" fi # Darwin sucks eval std_shrext=\"$shrext_cmds\" # Only execute mode is allowed to have -dlopen flags. if test -n "$opt_dlopen" && test "$opt_mode" != execute; then func_error "unrecognized option \`-dlopen'" $ECHO "$help" 1>&2 exit $EXIT_FAILURE fi # Change the help message to a mode-specific one. generic_help="$help" help="Try \`$progname --help --mode=$opt_mode' for more information." } # Bail if the options were screwed $exit_cmd $EXIT_FAILURE } ## ----------- ## ## Main. ## ## ----------- ## # func_lalib_p file # True iff FILE is a libtool `.la' library or `.lo' object file. # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_lalib_p () { test -f "$1" && $SED -e 4q "$1" 2>/dev/null \ | $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1 } # func_lalib_unsafe_p file # True iff FILE is a libtool `.la' library or `.lo' object file. # This function implements the same check as func_lalib_p without # resorting to external programs. To this end, it redirects stdin and # closes it afterwards, without saving the original file descriptor. # As a safety measure, use it only where a negative result would be # fatal anyway. Works if `file' does not exist. func_lalib_unsafe_p () { lalib_p=no if test -f "$1" && test -r "$1" && exec 5<&0 <"$1"; then for lalib_p_l in 1 2 3 4 do read lalib_p_line case "$lalib_p_line" in \#\ Generated\ by\ *$PACKAGE* ) lalib_p=yes; break;; esac done exec 0<&5 5<&- fi test "$lalib_p" = yes } # func_ltwrapper_script_p file # True iff FILE is a libtool wrapper script # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_script_p () { func_lalib_p "$1" } # func_ltwrapper_executable_p file # True iff FILE is a libtool wrapper executable # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_executable_p () { func_ltwrapper_exec_suffix= case $1 in *.exe) ;; *) func_ltwrapper_exec_suffix=.exe ;; esac $GREP "$magic_exe" "$1$func_ltwrapper_exec_suffix" >/dev/null 2>&1 } # func_ltwrapper_scriptname file # Assumes file is an ltwrapper_executable # uses $file to determine the appropriate filename for a # temporary ltwrapper_script. func_ltwrapper_scriptname () { func_dirname_and_basename "$1" "" "." func_stripname '' '.exe' "$func_basename_result" func_ltwrapper_scriptname_result="$func_dirname_result/$objdir/${func_stripname_result}_ltshwrapper" } # func_ltwrapper_p file # True iff FILE is a libtool wrapper script or wrapper executable # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_p () { func_ltwrapper_script_p "$1" || func_ltwrapper_executable_p "$1" } # func_execute_cmds commands fail_cmd # Execute tilde-delimited COMMANDS. # If FAIL_CMD is given, eval that upon failure. # FAIL_CMD may read-access the current command in variable CMD! func_execute_cmds () { $opt_debug save_ifs=$IFS; IFS='~' for cmd in $1; do IFS=$save_ifs eval cmd=\"$cmd\" func_show_eval "$cmd" "${2-:}" done IFS=$save_ifs } # func_source file # Source FILE, adding directory component if necessary. # Note that it is not necessary on cygwin/mingw to append a dot to # FILE even if both FILE and FILE.exe exist: automatic-append-.exe # behavior happens only for exec(3), not for open(2)! Also, sourcing # `FILE.' does not work on cygwin managed mounts. func_source () { $opt_debug case $1 in */* | *\\*) . "$1" ;; *) . "./$1" ;; esac } # func_resolve_sysroot PATH # Replace a leading = in PATH with a sysroot. Store the result into # func_resolve_sysroot_result func_resolve_sysroot () { func_resolve_sysroot_result=$1 case $func_resolve_sysroot_result in =*) func_stripname '=' '' "$func_resolve_sysroot_result" func_resolve_sysroot_result=$lt_sysroot$func_stripname_result ;; esac } # func_replace_sysroot PATH # If PATH begins with the sysroot, replace it with = and # store the result into func_replace_sysroot_result. func_replace_sysroot () { case "$lt_sysroot:$1" in ?*:"$lt_sysroot"*) func_stripname "$lt_sysroot" '' "$1" func_replace_sysroot_result="=$func_stripname_result" ;; *) # Including no sysroot. func_replace_sysroot_result=$1 ;; esac } # func_infer_tag arg # Infer tagged configuration to use if any are available and # if one wasn't chosen via the "--tag" command line option. # Only attempt this if the compiler in the base compile # command doesn't match the default compiler. # arg is usually of the form 'gcc ...' func_infer_tag () { $opt_debug if test -n "$available_tags" && test -z "$tagname"; then CC_quoted= for arg in $CC; do func_append_quoted CC_quoted "$arg" done CC_expanded=`func_echo_all $CC` CC_quoted_expanded=`func_echo_all $CC_quoted` case $@ in # Blanks in the command may have been stripped by the calling shell, # but not from the CC environment variable when configure was run. " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \ " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*) ;; # Blanks at the start of $base_compile will cause this to fail # if we don't check for them as well. *) for z in $available_tags; do if $GREP "^# ### BEGIN LIBTOOL TAG CONFIG: $z$" < "$progpath" > /dev/null; then # Evaluate the configuration. eval "`${SED} -n -e '/^# ### BEGIN LIBTOOL TAG CONFIG: '$z'$/,/^# ### END LIBTOOL TAG CONFIG: '$z'$/p' < $progpath`" CC_quoted= for arg in $CC; do # Double-quote args containing other shell metacharacters. func_append_quoted CC_quoted "$arg" done CC_expanded=`func_echo_all $CC` CC_quoted_expanded=`func_echo_all $CC_quoted` case "$@ " in " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \ " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*) # The compiler in the base compile command matches # the one in the tagged configuration. # Assume this is the tagged configuration we want. tagname=$z break ;; esac fi done # If $tagname still isn't set, then no tagged configuration # was found and let the user know that the "--tag" command # line option must be used. if test -z "$tagname"; then func_echo "unable to infer tagged configuration" func_fatal_error "specify a tag with \`--tag'" # else # func_verbose "using $tagname tagged configuration" fi ;; esac fi } # func_write_libtool_object output_name pic_name nonpic_name # Create a libtool object file (analogous to a ".la" file), # but don't create it if we're doing a dry run. func_write_libtool_object () { write_libobj=${1} if test "$build_libtool_libs" = yes; then write_lobj=\'${2}\' else write_lobj=none fi if test "$build_old_libs" = yes; then write_oldobj=\'${3}\' else write_oldobj=none fi $opt_dry_run || { cat >${write_libobj}T </dev/null` if test "$?" -eq 0 && test -n "${func_convert_core_file_wine_to_w32_tmp}"; then func_convert_core_file_wine_to_w32_result=`$ECHO "$func_convert_core_file_wine_to_w32_tmp" | $SED -e "$lt_sed_naive_backslashify"` else func_convert_core_file_wine_to_w32_result= fi fi } # end: func_convert_core_file_wine_to_w32 # func_convert_core_path_wine_to_w32 ARG # Helper function used by path conversion functions when $build is *nix, and # $host is mingw, cygwin, or some other w32 environment. Relies on a correctly # configured wine environment available, with the winepath program in $build's # $PATH. Assumes ARG has no leading or trailing path separator characters. # # ARG is path to be converted from $build format to win32. # Result is available in $func_convert_core_path_wine_to_w32_result. # Unconvertible file (directory) names in ARG are skipped; if no directory names # are convertible, then the result may be empty. func_convert_core_path_wine_to_w32 () { $opt_debug # unfortunately, winepath doesn't convert paths, only file names func_convert_core_path_wine_to_w32_result="" if test -n "$1"; then oldIFS=$IFS IFS=: for func_convert_core_path_wine_to_w32_f in $1; do IFS=$oldIFS func_convert_core_file_wine_to_w32 "$func_convert_core_path_wine_to_w32_f" if test -n "$func_convert_core_file_wine_to_w32_result" ; then if test -z "$func_convert_core_path_wine_to_w32_result"; then func_convert_core_path_wine_to_w32_result="$func_convert_core_file_wine_to_w32_result" else func_append func_convert_core_path_wine_to_w32_result ";$func_convert_core_file_wine_to_w32_result" fi fi done IFS=$oldIFS fi } # end: func_convert_core_path_wine_to_w32 # func_cygpath ARGS... # Wrapper around calling the cygpath program via LT_CYGPATH. This is used when # when (1) $build is *nix and Cygwin is hosted via a wine environment; or (2) # $build is MSYS and $host is Cygwin, or (3) $build is Cygwin. In case (1) or # (2), returns the Cygwin file name or path in func_cygpath_result (input # file name or path is assumed to be in w32 format, as previously converted # from $build's *nix or MSYS format). In case (3), returns the w32 file name # or path in func_cygpath_result (input file name or path is assumed to be in # Cygwin format). Returns an empty string on error. # # ARGS are passed to cygpath, with the last one being the file name or path to # be converted. # # Specify the absolute *nix (or w32) name to cygpath in the LT_CYGPATH # environment variable; do not put it in $PATH. func_cygpath () { $opt_debug if test -n "$LT_CYGPATH" && test -f "$LT_CYGPATH"; then func_cygpath_result=`$LT_CYGPATH "$@" 2>/dev/null` if test "$?" -ne 0; then # on failure, ensure result is empty func_cygpath_result= fi else func_cygpath_result= func_error "LT_CYGPATH is empty or specifies non-existent file: \`$LT_CYGPATH'" fi } #end: func_cygpath # func_convert_core_msys_to_w32 ARG # Convert file name or path ARG from MSYS format to w32 format. Return # result in func_convert_core_msys_to_w32_result. func_convert_core_msys_to_w32 () { $opt_debug # awkward: cmd appends spaces to result func_convert_core_msys_to_w32_result=`( cmd //c echo "$1" ) 2>/dev/null | $SED -e 's/[ ]*$//' -e "$lt_sed_naive_backslashify"` } #end: func_convert_core_msys_to_w32 # func_convert_file_check ARG1 ARG2 # Verify that ARG1 (a file name in $build format) was converted to $host # format in ARG2. Otherwise, emit an error message, but continue (resetting # func_to_host_file_result to ARG1). func_convert_file_check () { $opt_debug if test -z "$2" && test -n "$1" ; then func_error "Could not determine host file name corresponding to" func_error " \`$1'" func_error "Continuing, but uninstalled executables may not work." # Fallback: func_to_host_file_result="$1" fi } # end func_convert_file_check # func_convert_path_check FROM_PATHSEP TO_PATHSEP FROM_PATH TO_PATH # Verify that FROM_PATH (a path in $build format) was converted to $host # format in TO_PATH. Otherwise, emit an error message, but continue, resetting # func_to_host_file_result to a simplistic fallback value (see below). func_convert_path_check () { $opt_debug if test -z "$4" && test -n "$3"; then func_error "Could not determine the host path corresponding to" func_error " \`$3'" func_error "Continuing, but uninstalled executables may not work." # Fallback. This is a deliberately simplistic "conversion" and # should not be "improved". See libtool.info. if test "x$1" != "x$2"; then lt_replace_pathsep_chars="s|$1|$2|g" func_to_host_path_result=`echo "$3" | $SED -e "$lt_replace_pathsep_chars"` else func_to_host_path_result="$3" fi fi } # end func_convert_path_check # func_convert_path_front_back_pathsep FRONTPAT BACKPAT REPL ORIG # Modifies func_to_host_path_result by prepending REPL if ORIG matches FRONTPAT # and appending REPL if ORIG matches BACKPAT. func_convert_path_front_back_pathsep () { $opt_debug case $4 in $1 ) func_to_host_path_result="$3$func_to_host_path_result" ;; esac case $4 in $2 ) func_append func_to_host_path_result "$3" ;; esac } # end func_convert_path_front_back_pathsep ################################################## # $build to $host FILE NAME CONVERSION FUNCTIONS # ################################################## # invoked via `$to_host_file_cmd ARG' # # In each case, ARG is the path to be converted from $build to $host format. # Result will be available in $func_to_host_file_result. # func_to_host_file ARG # Converts the file name ARG from $build format to $host format. Return result # in func_to_host_file_result. func_to_host_file () { $opt_debug $to_host_file_cmd "$1" } # end func_to_host_file # func_to_tool_file ARG LAZY # converts the file name ARG from $build format to toolchain format. Return # result in func_to_tool_file_result. If the conversion in use is listed # in (the comma separated) LAZY, no conversion takes place. func_to_tool_file () { $opt_debug case ,$2, in *,"$to_tool_file_cmd",*) func_to_tool_file_result=$1 ;; *) $to_tool_file_cmd "$1" func_to_tool_file_result=$func_to_host_file_result ;; esac } # end func_to_tool_file # func_convert_file_noop ARG # Copy ARG to func_to_host_file_result. func_convert_file_noop () { func_to_host_file_result="$1" } # end func_convert_file_noop # func_convert_file_msys_to_w32 ARG # Convert file name ARG from (mingw) MSYS to (mingw) w32 format; automatic # conversion to w32 is not available inside the cwrapper. Returns result in # func_to_host_file_result. func_convert_file_msys_to_w32 () { $opt_debug func_to_host_file_result="$1" if test -n "$1"; then func_convert_core_msys_to_w32 "$1" func_to_host_file_result="$func_convert_core_msys_to_w32_result" fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_msys_to_w32 # func_convert_file_cygwin_to_w32 ARG # Convert file name ARG from Cygwin to w32 format. Returns result in # func_to_host_file_result. func_convert_file_cygwin_to_w32 () { $opt_debug func_to_host_file_result="$1" if test -n "$1"; then # because $build is cygwin, we call "the" cygpath in $PATH; no need to use # LT_CYGPATH in this case. func_to_host_file_result=`cygpath -m "$1"` fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_cygwin_to_w32 # func_convert_file_nix_to_w32 ARG # Convert file name ARG from *nix to w32 format. Requires a wine environment # and a working winepath. Returns result in func_to_host_file_result. func_convert_file_nix_to_w32 () { $opt_debug func_to_host_file_result="$1" if test -n "$1"; then func_convert_core_file_wine_to_w32 "$1" func_to_host_file_result="$func_convert_core_file_wine_to_w32_result" fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_nix_to_w32 # func_convert_file_msys_to_cygwin ARG # Convert file name ARG from MSYS to Cygwin format. Requires LT_CYGPATH set. # Returns result in func_to_host_file_result. func_convert_file_msys_to_cygwin () { $opt_debug func_to_host_file_result="$1" if test -n "$1"; then func_convert_core_msys_to_w32 "$1" func_cygpath -u "$func_convert_core_msys_to_w32_result" func_to_host_file_result="$func_cygpath_result" fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_msys_to_cygwin # func_convert_file_nix_to_cygwin ARG # Convert file name ARG from *nix to Cygwin format. Requires Cygwin installed # in a wine environment, working winepath, and LT_CYGPATH set. Returns result # in func_to_host_file_result. func_convert_file_nix_to_cygwin () { $opt_debug func_to_host_file_result="$1" if test -n "$1"; then # convert from *nix to w32, then use cygpath to convert from w32 to cygwin. func_convert_core_file_wine_to_w32 "$1" func_cygpath -u "$func_convert_core_file_wine_to_w32_result" func_to_host_file_result="$func_cygpath_result" fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_nix_to_cygwin ############################################# # $build to $host PATH CONVERSION FUNCTIONS # ############################################# # invoked via `$to_host_path_cmd ARG' # # In each case, ARG is the path to be converted from $build to $host format. # The result will be available in $func_to_host_path_result. # # Path separators are also converted from $build format to $host format. If # ARG begins or ends with a path separator character, it is preserved (but # converted to $host format) on output. # # All path conversion functions are named using the following convention: # file name conversion function : func_convert_file_X_to_Y () # path conversion function : func_convert_path_X_to_Y () # where, for any given $build/$host combination the 'X_to_Y' value is the # same. If conversion functions are added for new $build/$host combinations, # the two new functions must follow this pattern, or func_init_to_host_path_cmd # will break. # func_init_to_host_path_cmd # Ensures that function "pointer" variable $to_host_path_cmd is set to the # appropriate value, based on the value of $to_host_file_cmd. to_host_path_cmd= func_init_to_host_path_cmd () { $opt_debug if test -z "$to_host_path_cmd"; then func_stripname 'func_convert_file_' '' "$to_host_file_cmd" to_host_path_cmd="func_convert_path_${func_stripname_result}" fi } # func_to_host_path ARG # Converts the path ARG from $build format to $host format. Return result # in func_to_host_path_result. func_to_host_path () { $opt_debug func_init_to_host_path_cmd $to_host_path_cmd "$1" } # end func_to_host_path # func_convert_path_noop ARG # Copy ARG to func_to_host_path_result. func_convert_path_noop () { func_to_host_path_result="$1" } # end func_convert_path_noop # func_convert_path_msys_to_w32 ARG # Convert path ARG from (mingw) MSYS to (mingw) w32 format; automatic # conversion to w32 is not available inside the cwrapper. Returns result in # func_to_host_path_result. func_convert_path_msys_to_w32 () { $opt_debug func_to_host_path_result="$1" if test -n "$1"; then # Remove leading and trailing path separator characters from ARG. MSYS # behavior is inconsistent here; cygpath turns them into '.;' and ';.'; # and winepath ignores them completely. func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_msys_to_w32 "$func_to_host_path_tmp1" func_to_host_path_result="$func_convert_core_msys_to_w32_result" func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_msys_to_w32 # func_convert_path_cygwin_to_w32 ARG # Convert path ARG from Cygwin to w32 format. Returns result in # func_to_host_file_result. func_convert_path_cygwin_to_w32 () { $opt_debug func_to_host_path_result="$1" if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_to_host_path_result=`cygpath -m -p "$func_to_host_path_tmp1"` func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_cygwin_to_w32 # func_convert_path_nix_to_w32 ARG # Convert path ARG from *nix to w32 format. Requires a wine environment and # a working winepath. Returns result in func_to_host_file_result. func_convert_path_nix_to_w32 () { $opt_debug func_to_host_path_result="$1" if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1" func_to_host_path_result="$func_convert_core_path_wine_to_w32_result" func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_nix_to_w32 # func_convert_path_msys_to_cygwin ARG # Convert path ARG from MSYS to Cygwin format. Requires LT_CYGPATH set. # Returns result in func_to_host_file_result. func_convert_path_msys_to_cygwin () { $opt_debug func_to_host_path_result="$1" if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_msys_to_w32 "$func_to_host_path_tmp1" func_cygpath -u -p "$func_convert_core_msys_to_w32_result" func_to_host_path_result="$func_cygpath_result" func_convert_path_check : : \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" : "$1" fi } # end func_convert_path_msys_to_cygwin # func_convert_path_nix_to_cygwin ARG # Convert path ARG from *nix to Cygwin format. Requires Cygwin installed in a # a wine environment, working winepath, and LT_CYGPATH set. Returns result in # func_to_host_file_result. func_convert_path_nix_to_cygwin () { $opt_debug func_to_host_path_result="$1" if test -n "$1"; then # Remove leading and trailing path separator characters from # ARG. msys behavior is inconsistent here, cygpath turns them # into '.;' and ';.', and winepath ignores them completely. func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1" func_cygpath -u -p "$func_convert_core_path_wine_to_w32_result" func_to_host_path_result="$func_cygpath_result" func_convert_path_check : : \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" : "$1" fi } # end func_convert_path_nix_to_cygwin # func_mode_compile arg... func_mode_compile () { $opt_debug # Get the compilation command and the source file. base_compile= srcfile="$nonopt" # always keep a non-empty value in "srcfile" suppress_opt=yes suppress_output= arg_mode=normal libobj= later= pie_flag= for arg do case $arg_mode in arg ) # do not "continue". Instead, add this to base_compile lastarg="$arg" arg_mode=normal ;; target ) libobj="$arg" arg_mode=normal continue ;; normal ) # Accept any command-line options. case $arg in -o) test -n "$libobj" && \ func_fatal_error "you cannot specify \`-o' more than once" arg_mode=target continue ;; -pie | -fpie | -fPIE) func_append pie_flag " $arg" continue ;; -shared | -static | -prefer-pic | -prefer-non-pic) func_append later " $arg" continue ;; -no-suppress) suppress_opt=no continue ;; -Xcompiler) arg_mode=arg # the next one goes into the "base_compile" arg list continue # The current "srcfile" will either be retained or ;; # replaced later. I would guess that would be a bug. -Wc,*) func_stripname '-Wc,' '' "$arg" args=$func_stripname_result lastarg= save_ifs="$IFS"; IFS=',' for arg in $args; do IFS="$save_ifs" func_append_quoted lastarg "$arg" done IFS="$save_ifs" func_stripname ' ' '' "$lastarg" lastarg=$func_stripname_result # Add the arguments to base_compile. func_append base_compile " $lastarg" continue ;; *) # Accept the current argument as the source file. # The previous "srcfile" becomes the current argument. # lastarg="$srcfile" srcfile="$arg" ;; esac # case $arg ;; esac # case $arg_mode # Aesthetically quote the previous argument. func_append_quoted base_compile "$lastarg" done # for arg case $arg_mode in arg) func_fatal_error "you must specify an argument for -Xcompile" ;; target) func_fatal_error "you must specify a target with \`-o'" ;; *) # Get the name of the library object. test -z "$libobj" && { func_basename "$srcfile" libobj="$func_basename_result" } ;; esac # Recognize several different file suffixes. # If the user specifies -o file.o, it is replaced with file.lo case $libobj in *.[cCFSifmso] | \ *.ada | *.adb | *.ads | *.asm | \ *.c++ | *.cc | *.ii | *.class | *.cpp | *.cxx | \ *.[fF][09]? | *.for | *.java | *.go | *.obj | *.sx | *.cu | *.cup) func_xform "$libobj" libobj=$func_xform_result ;; esac case $libobj in *.lo) func_lo2o "$libobj"; obj=$func_lo2o_result ;; *) func_fatal_error "cannot determine name of library object from \`$libobj'" ;; esac func_infer_tag $base_compile for arg in $later; do case $arg in -shared) test "$build_libtool_libs" != yes && \ func_fatal_configuration "can not build a shared library" build_old_libs=no continue ;; -static) build_libtool_libs=no build_old_libs=yes continue ;; -prefer-pic) pic_mode=yes continue ;; -prefer-non-pic) pic_mode=no continue ;; esac done func_quote_for_eval "$libobj" test "X$libobj" != "X$func_quote_for_eval_result" \ && $ECHO "X$libobj" | $GREP '[]~#^*{};<>?"'"'"' &()|`$[]' \ && func_warning "libobj name \`$libobj' may not contain shell special characters." func_dirname_and_basename "$obj" "/" "" objname="$func_basename_result" xdir="$func_dirname_result" lobj=${xdir}$objdir/$objname test -z "$base_compile" && \ func_fatal_help "you must specify a compilation command" # Delete any leftover library objects. if test "$build_old_libs" = yes; then removelist="$obj $lobj $libobj ${libobj}T" else removelist="$lobj $libobj ${libobj}T" fi # On Cygwin there's no "real" PIC flag so we must build both object types case $host_os in cygwin* | mingw* | pw32* | os2* | cegcc*) pic_mode=default ;; esac if test "$pic_mode" = no && test "$deplibs_check_method" != pass_all; then # non-PIC code in shared libraries is not supported pic_mode=default fi # Calculate the filename of the output object if compiler does # not support -o with -c if test "$compiler_c_o" = no; then output_obj=`$ECHO "$srcfile" | $SED 's%^.*/%%; s%\.[^.]*$%%'`.${objext} lockfile="$output_obj.lock" else output_obj= need_locks=no lockfile= fi # Lock this critical section if it is needed # We use this script file to make the link, it avoids creating a new file if test "$need_locks" = yes; then until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do func_echo "Waiting for $lockfile to be removed" sleep 2 done elif test "$need_locks" = warn; then if test -f "$lockfile"; then $ECHO "\ *** ERROR, $lockfile exists and contains: `cat $lockfile 2>/dev/null` This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support \`-c' and \`-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi func_append removelist " $output_obj" $ECHO "$srcfile" > "$lockfile" fi $opt_dry_run || $RM $removelist func_append removelist " $lockfile" trap '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' 1 2 15 func_to_tool_file "$srcfile" func_convert_file_msys_to_w32 srcfile=$func_to_tool_file_result func_quote_for_eval "$srcfile" qsrcfile=$func_quote_for_eval_result # Only build a PIC object if we are building libtool libraries. if test "$build_libtool_libs" = yes; then # Without this assignment, base_compile gets emptied. fbsd_hideous_sh_bug=$base_compile if test "$pic_mode" != no; then command="$base_compile $qsrcfile $pic_flag" else # Don't build PIC code command="$base_compile $qsrcfile" fi func_mkdir_p "$xdir$objdir" if test -z "$output_obj"; then # Place PIC objects in $objdir func_append command " -o $lobj" fi func_show_eval_locale "$command" \ 'test -n "$output_obj" && $RM $removelist; exit $EXIT_FAILURE' if test "$need_locks" = warn && test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then $ECHO "\ *** ERROR, $lockfile contains: `cat $lockfile 2>/dev/null` but it should contain: $srcfile This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support \`-c' and \`-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi # Just move the object if needed, then go on to compile the next one if test -n "$output_obj" && test "X$output_obj" != "X$lobj"; then func_show_eval '$MV "$output_obj" "$lobj"' \ 'error=$?; $opt_dry_run || $RM $removelist; exit $error' fi # Allow error messages only from the first compilation. if test "$suppress_opt" = yes; then suppress_output=' >/dev/null 2>&1' fi fi # Only build a position-dependent object if we build old libraries. if test "$build_old_libs" = yes; then if test "$pic_mode" != yes; then # Don't build PIC code command="$base_compile $qsrcfile$pie_flag" else command="$base_compile $qsrcfile $pic_flag" fi if test "$compiler_c_o" = yes; then func_append command " -o $obj" fi # Suppress compiler output if we already did a PIC compilation. func_append command "$suppress_output" func_show_eval_locale "$command" \ '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' if test "$need_locks" = warn && test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then $ECHO "\ *** ERROR, $lockfile contains: `cat $lockfile 2>/dev/null` but it should contain: $srcfile This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support \`-c' and \`-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi # Just move the object if needed if test -n "$output_obj" && test "X$output_obj" != "X$obj"; then func_show_eval '$MV "$output_obj" "$obj"' \ 'error=$?; $opt_dry_run || $RM $removelist; exit $error' fi fi $opt_dry_run || { func_write_libtool_object "$libobj" "$objdir/$objname" "$objname" # Unlock the critical section if it was locked if test "$need_locks" != no; then removelist=$lockfile $RM "$lockfile" fi } exit $EXIT_SUCCESS } $opt_help || { test "$opt_mode" = compile && func_mode_compile ${1+"$@"} } func_mode_help () { # We need to display help for each of the modes. case $opt_mode in "") # Generic help is extracted from the usage comments # at the start of this file. func_help ;; clean) $ECHO \ "Usage: $progname [OPTION]... --mode=clean RM [RM-OPTION]... FILE... Remove files from the build directory. RM is the name of the program to use to delete files associated with each FILE (typically \`/bin/rm'). RM-OPTIONS are options (such as \`-f') to be passed to RM. If FILE is a libtool library, object or program, all the files associated with it are deleted. Otherwise, only FILE itself is deleted using RM." ;; compile) $ECHO \ "Usage: $progname [OPTION]... --mode=compile COMPILE-COMMAND... SOURCEFILE Compile a source file into a libtool library object. This mode accepts the following additional options: -o OUTPUT-FILE set the output file name to OUTPUT-FILE -no-suppress do not suppress compiler output for multiple passes -prefer-pic try to build PIC objects only -prefer-non-pic try to build non-PIC objects only -shared do not build a \`.o' file suitable for static linking -static only build a \`.o' file suitable for static linking -Wc,FLAG pass FLAG directly to the compiler COMPILE-COMMAND is a command to be used in creating a \`standard' object file from the given SOURCEFILE. The output file name is determined by removing the directory component from SOURCEFILE, then substituting the C source code suffix \`.c' with the library object suffix, \`.lo'." ;; execute) $ECHO \ "Usage: $progname [OPTION]... --mode=execute COMMAND [ARGS]... Automatically set library path, then run a program. This mode accepts the following additional options: -dlopen FILE add the directory containing FILE to the library path This mode sets the library path environment variable according to \`-dlopen' flags. If any of the ARGS are libtool executable wrappers, then they are translated into their corresponding uninstalled binary, and any of their required library directories are added to the library path. Then, COMMAND is executed, with ARGS as arguments." ;; finish) $ECHO \ "Usage: $progname [OPTION]... --mode=finish [LIBDIR]... Complete the installation of libtool libraries. Each LIBDIR is a directory that contains libtool libraries. The commands that this mode executes may require superuser privileges. Use the \`--dry-run' option if you just want to see what would be executed." ;; install) $ECHO \ "Usage: $progname [OPTION]... --mode=install INSTALL-COMMAND... Install executables or libraries. INSTALL-COMMAND is the installation command. The first component should be either the \`install' or \`cp' program. The following components of INSTALL-COMMAND are treated specially: -inst-prefix-dir PREFIX-DIR Use PREFIX-DIR as a staging area for installation The rest of the components are interpreted as arguments to that command (only BSD-compatible install options are recognized)." ;; link) $ECHO \ "Usage: $progname [OPTION]... --mode=link LINK-COMMAND... Link object files or libraries together to form another library, or to create an executable program. LINK-COMMAND is a command using the C compiler that you would use to create a program from several object files. The following components of LINK-COMMAND are treated specially: -all-static do not do any dynamic linking at all -avoid-version do not add a version suffix if possible -bindir BINDIR specify path to binaries directory (for systems where libraries must be found in the PATH setting at runtime) -dlopen FILE \`-dlpreopen' FILE if it cannot be dlopened at runtime -dlpreopen FILE link in FILE and add its symbols to lt_preloaded_symbols -export-dynamic allow symbols from OUTPUT-FILE to be resolved with dlsym(3) -export-symbols SYMFILE try to export only the symbols listed in SYMFILE -export-symbols-regex REGEX try to export only the symbols matching REGEX -LLIBDIR search LIBDIR for required installed libraries -lNAME OUTPUT-FILE requires the installed library libNAME -module build a library that can dlopened -no-fast-install disable the fast-install mode -no-install link a not-installable executable -no-undefined declare that a library does not refer to external symbols -o OUTPUT-FILE create OUTPUT-FILE from the specified objects -objectlist FILE Use a list of object files found in FILE to specify objects -precious-files-regex REGEX don't remove output files matching REGEX -release RELEASE specify package release information -rpath LIBDIR the created library will eventually be installed in LIBDIR -R[ ]LIBDIR add LIBDIR to the runtime path of programs and libraries -shared only do dynamic linking of libtool libraries -shrext SUFFIX override the standard shared library file extension -static do not do any dynamic linking of uninstalled libtool libraries -static-libtool-libs do not do any dynamic linking of libtool libraries -version-info CURRENT[:REVISION[:AGE]] specify library version info [each variable defaults to 0] -weak LIBNAME declare that the target provides the LIBNAME interface -Wc,FLAG -Xcompiler FLAG pass linker-specific FLAG directly to the compiler -Wl,FLAG -Xlinker FLAG pass linker-specific FLAG directly to the linker -XCClinker FLAG pass link-specific FLAG to the compiler driver (CC) All other options (arguments beginning with \`-') are ignored. Every other argument is treated as a filename. Files ending in \`.la' are treated as uninstalled libtool libraries, other files are standard or library object files. If the OUTPUT-FILE ends in \`.la', then a libtool library is created, only library objects (\`.lo' files) may be specified, and \`-rpath' is required, except when creating a convenience library. If OUTPUT-FILE ends in \`.a' or \`.lib', then a standard library is created using \`ar' and \`ranlib', or on Windows using \`lib'. If OUTPUT-FILE ends in \`.lo' or \`.${objext}', then a reloadable object file is created, otherwise an executable program is created." ;; uninstall) $ECHO \ "Usage: $progname [OPTION]... --mode=uninstall RM [RM-OPTION]... FILE... Remove libraries from an installation directory. RM is the name of the program to use to delete files associated with each FILE (typically \`/bin/rm'). RM-OPTIONS are options (such as \`-f') to be passed to RM. If FILE is a libtool library, all the files associated with it are deleted. Otherwise, only FILE itself is deleted using RM." ;; *) func_fatal_help "invalid operation mode \`$opt_mode'" ;; esac echo $ECHO "Try \`$progname --help' for more information about other modes." } # Now that we've collected a possible --mode arg, show help if necessary if $opt_help; then if test "$opt_help" = :; then func_mode_help else { func_help noexit for opt_mode in compile link execute install finish uninstall clean; do func_mode_help done } | sed -n '1p; 2,$s/^Usage:/ or: /p' { func_help noexit for opt_mode in compile link execute install finish uninstall clean; do echo func_mode_help done } | sed '1d /^When reporting/,/^Report/{ H d } $x /information about other modes/d /more detailed .*MODE/d s/^Usage:.*--mode=\([^ ]*\) .*/Description of \1 mode:/' fi exit $? fi # func_mode_execute arg... func_mode_execute () { $opt_debug # The first argument is the command name. cmd="$nonopt" test -z "$cmd" && \ func_fatal_help "you must specify a COMMAND" # Handle -dlopen flags immediately. for file in $opt_dlopen; do test -f "$file" \ || func_fatal_help "\`$file' is not a file" dir= case $file in *.la) func_resolve_sysroot "$file" file=$func_resolve_sysroot_result # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$file" \ || func_fatal_help "\`$lib' is not a valid libtool archive" # Read the libtool library. dlname= library_names= func_source "$file" # Skip this library if it cannot be dlopened. if test -z "$dlname"; then # Warn if it was a shared library. test -n "$library_names" && \ func_warning "\`$file' was not linked with \`-export-dynamic'" continue fi func_dirname "$file" "" "." dir="$func_dirname_result" if test -f "$dir/$objdir/$dlname"; then func_append dir "/$objdir" else if test ! -f "$dir/$dlname"; then func_fatal_error "cannot find \`$dlname' in \`$dir' or \`$dir/$objdir'" fi fi ;; *.lo) # Just add the directory containing the .lo file. func_dirname "$file" "" "." dir="$func_dirname_result" ;; *) func_warning "\`-dlopen' is ignored for non-libtool libraries and objects" continue ;; esac # Get the absolute pathname. absdir=`cd "$dir" && pwd` test -n "$absdir" && dir="$absdir" # Now add the directory to shlibpath_var. if eval "test -z \"\$$shlibpath_var\""; then eval "$shlibpath_var=\"\$dir\"" else eval "$shlibpath_var=\"\$dir:\$$shlibpath_var\"" fi done # This variable tells wrapper scripts just to set shlibpath_var # rather than running their programs. libtool_execute_magic="$magic" # Check if any of the arguments is a wrapper script. args= for file do case $file in -* | *.la | *.lo ) ;; *) # Do a test to see if this is really a libtool program. if func_ltwrapper_script_p "$file"; then func_source "$file" # Transform arg to wrapped name. file="$progdir/$program" elif func_ltwrapper_executable_p "$file"; then func_ltwrapper_scriptname "$file" func_source "$func_ltwrapper_scriptname_result" # Transform arg to wrapped name. file="$progdir/$program" fi ;; esac # Quote arguments (to preserve shell metacharacters). func_append_quoted args "$file" done if test "X$opt_dry_run" = Xfalse; then if test -n "$shlibpath_var"; then # Export the shlibpath_var. eval "export $shlibpath_var" fi # Restore saved environment variables for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES do eval "if test \"\${save_$lt_var+set}\" = set; then $lt_var=\$save_$lt_var; export $lt_var else $lt_unset $lt_var fi" done # Now prepare to actually exec the command. exec_cmd="\$cmd$args" else # Display what would be done. if test -n "$shlibpath_var"; then eval "\$ECHO \"\$shlibpath_var=\$$shlibpath_var\"" echo "export $shlibpath_var" fi $ECHO "$cmd$args" exit $EXIT_SUCCESS fi } test "$opt_mode" = execute && func_mode_execute ${1+"$@"} # func_mode_finish arg... func_mode_finish () { $opt_debug libs= libdirs= admincmds= for opt in "$nonopt" ${1+"$@"} do if test -d "$opt"; then func_append libdirs " $opt" elif test -f "$opt"; then if func_lalib_unsafe_p "$opt"; then func_append libs " $opt" else func_warning "\`$opt' is not a valid libtool archive" fi else func_fatal_error "invalid argument \`$opt'" fi done if test -n "$libs"; then if test -n "$lt_sysroot"; then sysroot_regex=`$ECHO "$lt_sysroot" | $SED "$sed_make_literal_regex"` sysroot_cmd="s/\([ ']\)$sysroot_regex/\1/g;" else sysroot_cmd= fi # Remove sysroot references if $opt_dry_run; then for lib in $libs; do echo "removing references to $lt_sysroot and \`=' prefixes from $lib" done else tmpdir=`func_mktempdir` for lib in $libs; do sed -e "${sysroot_cmd} s/\([ ']-[LR]\)=/\1/g; s/\([ ']\)=/\1/g" $lib \ > $tmpdir/tmp-la mv -f $tmpdir/tmp-la $lib done ${RM}r "$tmpdir" fi fi if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then for libdir in $libdirs; do if test -n "$finish_cmds"; then # Do each command in the finish commands. func_execute_cmds "$finish_cmds" 'admincmds="$admincmds '"$cmd"'"' fi if test -n "$finish_eval"; then # Do the single finish_eval. eval cmds=\"$finish_eval\" $opt_dry_run || eval "$cmds" || func_append admincmds " $cmds" fi done fi # Exit here if they wanted silent mode. $opt_silent && exit $EXIT_SUCCESS if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then echo "----------------------------------------------------------------------" echo "Libraries have been installed in:" for libdir in $libdirs; do $ECHO " $libdir" done echo echo "If you ever happen to want to link against installed libraries" echo "in a given directory, LIBDIR, you must either use libtool, and" echo "specify the full pathname of the library, or use the \`-LLIBDIR'" echo "flag during linking and do at least one of the following:" if test -n "$shlibpath_var"; then echo " - add LIBDIR to the \`$shlibpath_var' environment variable" echo " during execution" fi if test -n "$runpath_var"; then echo " - add LIBDIR to the \`$runpath_var' environment variable" echo " during linking" fi if test -n "$hardcode_libdir_flag_spec"; then libdir=LIBDIR eval flag=\"$hardcode_libdir_flag_spec\" $ECHO " - use the \`$flag' linker flag" fi if test -n "$admincmds"; then $ECHO " - have your system administrator run these commands:$admincmds" fi if test -f /etc/ld.so.conf; then echo " - have your system administrator add LIBDIR to \`/etc/ld.so.conf'" fi echo echo "See any operating system documentation about shared libraries for" case $host in solaris2.[6789]|solaris2.1[0-9]) echo "more information, such as the ld(1), crle(1) and ld.so(8) manual" echo "pages." ;; *) echo "more information, such as the ld(1) and ld.so(8) manual pages." ;; esac echo "----------------------------------------------------------------------" fi exit $EXIT_SUCCESS } test "$opt_mode" = finish && func_mode_finish ${1+"$@"} # func_mode_install arg... func_mode_install () { $opt_debug # There may be an optional sh(1) argument at the beginning of # install_prog (especially on Windows NT). if test "$nonopt" = "$SHELL" || test "$nonopt" = /bin/sh || # Allow the use of GNU shtool's install command. case $nonopt in *shtool*) :;; *) false;; esac; then # Aesthetically quote it. func_quote_for_eval "$nonopt" install_prog="$func_quote_for_eval_result " arg=$1 shift else install_prog= arg=$nonopt fi # The real first argument should be the name of the installation program. # Aesthetically quote it. func_quote_for_eval "$arg" func_append install_prog "$func_quote_for_eval_result" install_shared_prog=$install_prog case " $install_prog " in *[\\\ /]cp\ *) install_cp=: ;; *) install_cp=false ;; esac # We need to accept at least all the BSD install flags. dest= files= opts= prev= install_type= isdir=no stripme= no_mode=: for arg do arg2= if test -n "$dest"; then func_append files " $dest" dest=$arg continue fi case $arg in -d) isdir=yes ;; -f) if $install_cp; then :; else prev=$arg fi ;; -g | -m | -o) prev=$arg ;; -s) stripme=" -s" continue ;; -*) ;; *) # If the previous option needed an argument, then skip it. if test -n "$prev"; then if test "x$prev" = x-m && test -n "$install_override_mode"; then arg2=$install_override_mode no_mode=false fi prev= else dest=$arg continue fi ;; esac # Aesthetically quote the argument. func_quote_for_eval "$arg" func_append install_prog " $func_quote_for_eval_result" if test -n "$arg2"; then func_quote_for_eval "$arg2" fi func_append install_shared_prog " $func_quote_for_eval_result" done test -z "$install_prog" && \ func_fatal_help "you must specify an install program" test -n "$prev" && \ func_fatal_help "the \`$prev' option requires an argument" if test -n "$install_override_mode" && $no_mode; then if $install_cp; then :; else func_quote_for_eval "$install_override_mode" func_append install_shared_prog " -m $func_quote_for_eval_result" fi fi if test -z "$files"; then if test -z "$dest"; then func_fatal_help "no file or destination specified" else func_fatal_help "you must specify a destination" fi fi # Strip any trailing slash from the destination. func_stripname '' '/' "$dest" dest=$func_stripname_result # Check to see that the destination is a directory. test -d "$dest" && isdir=yes if test "$isdir" = yes; then destdir="$dest" destname= else func_dirname_and_basename "$dest" "" "." destdir="$func_dirname_result" destname="$func_basename_result" # Not a directory, so check to see that there is only one file specified. set dummy $files; shift test "$#" -gt 1 && \ func_fatal_help "\`$dest' is not a directory" fi case $destdir in [\\/]* | [A-Za-z]:[\\/]*) ;; *) for file in $files; do case $file in *.lo) ;; *) func_fatal_help "\`$destdir' must be an absolute directory name" ;; esac done ;; esac # This variable tells wrapper scripts just to set variables rather # than running their programs. libtool_install_magic="$magic" staticlibs= future_libdirs= current_libdirs= for file in $files; do # Do each installation. case $file in *.$libext) # Do the static libraries later. func_append staticlibs " $file" ;; *.la) func_resolve_sysroot "$file" file=$func_resolve_sysroot_result # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$file" \ || func_fatal_help "\`$file' is not a valid libtool archive" library_names= old_library= relink_command= func_source "$file" # Add the libdir to current_libdirs if it is the destination. if test "X$destdir" = "X$libdir"; then case "$current_libdirs " in *" $libdir "*) ;; *) func_append current_libdirs " $libdir" ;; esac else # Note the libdir as a future libdir. case "$future_libdirs " in *" $libdir "*) ;; *) func_append future_libdirs " $libdir" ;; esac fi func_dirname "$file" "/" "" dir="$func_dirname_result" func_append dir "$objdir" if test -n "$relink_command"; then # Determine the prefix the user has applied to our future dir. inst_prefix_dir=`$ECHO "$destdir" | $SED -e "s%$libdir\$%%"` # Don't allow the user to place us outside of our expected # location b/c this prevents finding dependent libraries that # are installed to the same prefix. # At present, this check doesn't affect windows .dll's that # are installed into $libdir/../bin (currently, that works fine) # but it's something to keep an eye on. test "$inst_prefix_dir" = "$destdir" && \ func_fatal_error "error: cannot install \`$file' to a directory not ending in $libdir" if test -n "$inst_prefix_dir"; then # Stick the inst_prefix_dir data into the link command. relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"` else relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"` fi func_warning "relinking \`$file'" func_show_eval "$relink_command" \ 'func_fatal_error "error: relink \`$file'\'' with the above command before installing it"' fi # See the names of the shared library. set dummy $library_names; shift if test -n "$1"; then realname="$1" shift srcname="$realname" test -n "$relink_command" && srcname="$realname"T # Install the shared library and build the symlinks. func_show_eval "$install_shared_prog $dir/$srcname $destdir/$realname" \ 'exit $?' tstripme="$stripme" case $host_os in cygwin* | mingw* | pw32* | cegcc*) case $realname in *.dll.a) tstripme="" ;; esac ;; esac if test -n "$tstripme" && test -n "$striplib"; then func_show_eval "$striplib $destdir/$realname" 'exit $?' fi if test "$#" -gt 0; then # Delete the old symlinks, and create new ones. # Try `ln -sf' first, because the `ln' binary might depend on # the symlink we replace! Solaris /bin/ln does not understand -f, # so we also need to try rm && ln -s. for linkname do test "$linkname" != "$realname" \ && func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })" done fi # Do each command in the postinstall commands. lib="$destdir/$realname" func_execute_cmds "$postinstall_cmds" 'exit $?' fi # Install the pseudo-library for information purposes. func_basename "$file" name="$func_basename_result" instname="$dir/$name"i func_show_eval "$install_prog $instname $destdir/$name" 'exit $?' # Maybe install the static library, too. test -n "$old_library" && func_append staticlibs " $dir/$old_library" ;; *.lo) # Install (i.e. copy) a libtool object. # Figure out destination file name, if it wasn't already specified. if test -n "$destname"; then destfile="$destdir/$destname" else func_basename "$file" destfile="$func_basename_result" destfile="$destdir/$destfile" fi # Deduce the name of the destination old-style object file. case $destfile in *.lo) func_lo2o "$destfile" staticdest=$func_lo2o_result ;; *.$objext) staticdest="$destfile" destfile= ;; *) func_fatal_help "cannot copy a libtool object to \`$destfile'" ;; esac # Install the libtool object if requested. test -n "$destfile" && \ func_show_eval "$install_prog $file $destfile" 'exit $?' # Install the old object if enabled. if test "$build_old_libs" = yes; then # Deduce the name of the old-style object file. func_lo2o "$file" staticobj=$func_lo2o_result func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?' fi exit $EXIT_SUCCESS ;; *) # Figure out destination file name, if it wasn't already specified. if test -n "$destname"; then destfile="$destdir/$destname" else func_basename "$file" destfile="$func_basename_result" destfile="$destdir/$destfile" fi # If the file is missing, and there is a .exe on the end, strip it # because it is most likely a libtool script we actually want to # install stripped_ext="" case $file in *.exe) if test ! -f "$file"; then func_stripname '' '.exe' "$file" file=$func_stripname_result stripped_ext=".exe" fi ;; esac # Do a test to see if this is really a libtool program. case $host in *cygwin* | *mingw*) if func_ltwrapper_executable_p "$file"; then func_ltwrapper_scriptname "$file" wrapper=$func_ltwrapper_scriptname_result else func_stripname '' '.exe' "$file" wrapper=$func_stripname_result fi ;; *) wrapper=$file ;; esac if func_ltwrapper_script_p "$wrapper"; then notinst_deplibs= relink_command= func_source "$wrapper" # Check the variables that should have been set. test -z "$generated_by_libtool_version" && \ func_fatal_error "invalid libtool wrapper script \`$wrapper'" finalize=yes for lib in $notinst_deplibs; do # Check to see that each library is installed. libdir= if test -f "$lib"; then func_source "$lib" fi libfile="$libdir/"`$ECHO "$lib" | $SED 's%^.*/%%g'` ### testsuite: skip nested quoting test if test -n "$libdir" && test ! -f "$libfile"; then func_warning "\`$lib' has not been installed in \`$libdir'" finalize=no fi done relink_command= func_source "$wrapper" outputname= if test "$fast_install" = no && test -n "$relink_command"; then $opt_dry_run || { if test "$finalize" = yes; then tmpdir=`func_mktempdir` func_basename "$file$stripped_ext" file="$func_basename_result" outputname="$tmpdir/$file" # Replace the output file specification. relink_command=`$ECHO "$relink_command" | $SED 's%@OUTPUT@%'"$outputname"'%g'` $opt_silent || { func_quote_for_expand "$relink_command" eval "func_echo $func_quote_for_expand_result" } if eval "$relink_command"; then : else func_error "error: relink \`$file' with the above command before installing it" $opt_dry_run || ${RM}r "$tmpdir" continue fi file="$outputname" else func_warning "cannot relink \`$file'" fi } else # Install the binary that we compiled earlier. file=`$ECHO "$file$stripped_ext" | $SED "s%\([^/]*\)$%$objdir/\1%"` fi fi # remove .exe since cygwin /usr/bin/install will append another # one anyway case $install_prog,$host in */usr/bin/install*,*cygwin*) case $file:$destfile in *.exe:*.exe) # this is ok ;; *.exe:*) destfile=$destfile.exe ;; *:*.exe) func_stripname '' '.exe' "$destfile" destfile=$func_stripname_result ;; esac ;; esac func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?' $opt_dry_run || if test -n "$outputname"; then ${RM}r "$tmpdir" fi ;; esac done for file in $staticlibs; do func_basename "$file" name="$func_basename_result" # Set up the ranlib parameters. oldlib="$destdir/$name" func_to_tool_file "$oldlib" func_convert_file_msys_to_w32 tool_oldlib=$func_to_tool_file_result func_show_eval "$install_prog \$file \$oldlib" 'exit $?' if test -n "$stripme" && test -n "$old_striplib"; then func_show_eval "$old_striplib $tool_oldlib" 'exit $?' fi # Do each command in the postinstall commands. func_execute_cmds "$old_postinstall_cmds" 'exit $?' done test -n "$future_libdirs" && \ func_warning "remember to run \`$progname --finish$future_libdirs'" if test -n "$current_libdirs"; then # Maybe just do a dry run. $opt_dry_run && current_libdirs=" -n$current_libdirs" exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs' else exit $EXIT_SUCCESS fi } test "$opt_mode" = install && func_mode_install ${1+"$@"} # func_generate_dlsyms outputname originator pic_p # Extract symbols from dlprefiles and create ${outputname}S.o with # a dlpreopen symbol table. func_generate_dlsyms () { $opt_debug my_outputname="$1" my_originator="$2" my_pic_p="${3-no}" my_prefix=`$ECHO "$my_originator" | sed 's%[^a-zA-Z0-9]%_%g'` my_dlsyms= if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then if test -n "$NM" && test -n "$global_symbol_pipe"; then my_dlsyms="${my_outputname}S.c" else func_error "not configured to extract global symbols from dlpreopened files" fi fi if test -n "$my_dlsyms"; then case $my_dlsyms in "") ;; *.c) # Discover the nlist of each of the dlfiles. nlist="$output_objdir/${my_outputname}.nm" func_show_eval "$RM $nlist ${nlist}S ${nlist}T" # Parse the name list into a source file. func_verbose "creating $output_objdir/$my_dlsyms" $opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\ /* $my_dlsyms - symbol resolution table for \`$my_outputname' dlsym emulation. */ /* Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION */ #ifdef __cplusplus extern \"C\" { #endif #if defined(__GNUC__) && (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4)) || (__GNUC__ > 4)) #pragma GCC diagnostic ignored \"-Wstrict-prototypes\" #endif /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) /* DATA imports from DLLs on WIN32 con't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT_DLSYM_CONST #elif defined(__osf__) /* This system does not cope well with relocations in const data. */ # define LT_DLSYM_CONST #else # define LT_DLSYM_CONST const #endif /* External symbol declarations for the compiler. */\ " if test "$dlself" = yes; then func_verbose "generating symbol list for \`$output'" $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist" # Add our own program objects to the symbol list. progfiles=`$ECHO "$objs$old_deplibs" | $SP2NL | $SED "$lo2o" | $NL2SP` for progfile in $progfiles; do func_to_tool_file "$progfile" func_convert_file_msys_to_w32 func_verbose "extracting global C symbols from \`$func_to_tool_file_result'" $opt_dry_run || eval "$NM $func_to_tool_file_result | $global_symbol_pipe >> '$nlist'" done if test -n "$exclude_expsyms"; then $opt_dry_run || { eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' } fi if test -n "$export_symbols_regex"; then $opt_dry_run || { eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' } fi # Prepare the list of exported symbols if test -z "$export_symbols"; then export_symbols="$output_objdir/$outputname.exp" $opt_dry_run || { $RM $export_symbols eval "${SED} -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"' case $host in *cygwin* | *mingw* | *cegcc* ) eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"' ;; esac } else $opt_dry_run || { eval "${SED} -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"' eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' case $host in *cygwin* | *mingw* | *cegcc* ) eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' eval 'cat "$nlist" >> "$output_objdir/$outputname.def"' ;; esac } fi fi for dlprefile in $dlprefiles; do func_verbose "extracting global C symbols from \`$dlprefile'" func_basename "$dlprefile" name="$func_basename_result" case $host in *cygwin* | *mingw* | *cegcc* ) # if an import library, we need to obtain dlname if func_win32_import_lib_p "$dlprefile"; then func_tr_sh "$dlprefile" eval "curr_lafile=\$libfile_$func_tr_sh_result" dlprefile_dlbasename="" if test -n "$curr_lafile" && func_lalib_p "$curr_lafile"; then # Use subshell, to avoid clobbering current variable values dlprefile_dlname=`source "$curr_lafile" && echo "$dlname"` if test -n "$dlprefile_dlname" ; then func_basename "$dlprefile_dlname" dlprefile_dlbasename="$func_basename_result" else # no lafile. user explicitly requested -dlpreopen . $sharedlib_from_linklib_cmd "$dlprefile" dlprefile_dlbasename=$sharedlib_from_linklib_result fi fi $opt_dry_run || { if test -n "$dlprefile_dlbasename" ; then eval '$ECHO ": $dlprefile_dlbasename" >> "$nlist"' else func_warning "Could not compute DLL name from $name" eval '$ECHO ": $name " >> "$nlist"' fi func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe | $SED -e '/I __imp/d' -e 's/I __nm_/D /;s/_nm__//' >> '$nlist'" } else # not an import lib $opt_dry_run || { eval '$ECHO ": $name " >> "$nlist"' func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'" } fi ;; *) $opt_dry_run || { eval '$ECHO ": $name " >> "$nlist"' func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'" } ;; esac done $opt_dry_run || { # Make sure we have at least an empty file. test -f "$nlist" || : > "$nlist" if test -n "$exclude_expsyms"; then $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T $MV "$nlist"T "$nlist" fi # Try sorting and uniquifying the output. if $GREP -v "^: " < "$nlist" | if sort -k 3 /dev/null 2>&1; then sort -k 3 else sort +2 fi | uniq > "$nlist"S; then : else $GREP -v "^: " < "$nlist" > "$nlist"S fi if test -f "$nlist"S; then eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"' else echo '/* NONE */' >> "$output_objdir/$my_dlsyms" fi echo >> "$output_objdir/$my_dlsyms" "\ /* The mapping between symbol names and symbols. */ typedef struct { const char *name; void *address; } lt_dlsymlist; extern LT_DLSYM_CONST lt_dlsymlist lt_${my_prefix}_LTX_preloaded_symbols[]; LT_DLSYM_CONST lt_dlsymlist lt_${my_prefix}_LTX_preloaded_symbols[] = {\ { \"$my_originator\", (void *) 0 }," case $need_lib_prefix in no) eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms" ;; *) eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms" ;; esac echo >> "$output_objdir/$my_dlsyms" "\ {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt_${my_prefix}_LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif\ " } # !$opt_dry_run pic_flag_for_symtable= case "$compile_command " in *" -static "*) ;; *) case $host in # compiling the symbol table file with pic_flag works around # a FreeBSD bug that causes programs to crash when -lm is # linked before any other PIC object. But we must not use # pic_flag when linking with -static. The problem exists in # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1. *-*-freebsd2.*|*-*-freebsd3.0*|*-*-freebsdelf3.0*) pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;; *-*-hpux*) pic_flag_for_symtable=" $pic_flag" ;; *) if test "X$my_pic_p" != Xno; then pic_flag_for_symtable=" $pic_flag" fi ;; esac ;; esac symtab_cflags= for arg in $LTCFLAGS; do case $arg in -pie | -fpie | -fPIE) ;; *) func_append symtab_cflags " $arg" ;; esac done # Now compile the dynamic symbol file. func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?' # Clean up the generated files. func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T"' # Transform the symbol file into the correct name. symfileobj="$output_objdir/${my_outputname}S.$objext" case $host in *cygwin* | *mingw* | *cegcc* ) if test -f "$output_objdir/$my_outputname.def"; then compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` else compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` fi ;; *) compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` ;; esac ;; *) func_fatal_error "unknown suffix for \`$my_dlsyms'" ;; esac else # We keep going just in case the user didn't refer to # lt_preloaded_symbols. The linker will fail if global_symbol_pipe # really was required. # Nullify the symbol file. compile_command=`$ECHO "$compile_command" | $SED "s% @SYMFILE@%%"` finalize_command=`$ECHO "$finalize_command" | $SED "s% @SYMFILE@%%"` fi } # func_win32_libid arg # return the library type of file 'arg' # # Need a lot of goo to handle *both* DLLs and import libs # Has to be a shell function in order to 'eat' the argument # that is supplied when $file_magic_command is called. # Despite the name, also deal with 64 bit binaries. func_win32_libid () { $opt_debug win32_libid_type="unknown" win32_fileres=`file -L $1 2>/dev/null` case $win32_fileres in *ar\ archive\ import\ library*) # definitely import win32_libid_type="x86 archive import" ;; *ar\ archive*) # could be an import, or static # Keep the egrep pattern in sync with the one in _LT_CHECK_MAGIC_METHOD. if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | $EGREP 'file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' >/dev/null; then func_to_tool_file "$1" func_convert_file_msys_to_w32 win32_nmres=`eval $NM -f posix -A \"$func_to_tool_file_result\" | $SED -n -e ' 1,100{ / I /{ s,.*,import, p q } }'` case $win32_nmres in import*) win32_libid_type="x86 archive import";; *) win32_libid_type="x86 archive static";; esac fi ;; *DLL*) win32_libid_type="x86 DLL" ;; *executable*) # but shell scripts are "executable" too... case $win32_fileres in *MS\ Windows\ PE\ Intel*) win32_libid_type="x86 DLL" ;; esac ;; esac $ECHO "$win32_libid_type" } # func_cygming_dll_for_implib ARG # # Platform-specific function to extract the # name of the DLL associated with the specified # import library ARG. # Invoked by eval'ing the libtool variable # $sharedlib_from_linklib_cmd # Result is available in the variable # $sharedlib_from_linklib_result func_cygming_dll_for_implib () { $opt_debug sharedlib_from_linklib_result=`$DLLTOOL --identify-strict --identify "$1"` } # func_cygming_dll_for_implib_fallback_core SECTION_NAME LIBNAMEs # # The is the core of a fallback implementation of a # platform-specific function to extract the name of the # DLL associated with the specified import library LIBNAME. # # SECTION_NAME is either .idata$6 or .idata$7, depending # on the platform and compiler that created the implib. # # Echos the name of the DLL associated with the # specified import library. func_cygming_dll_for_implib_fallback_core () { $opt_debug match_literal=`$ECHO "$1" | $SED "$sed_make_literal_regex"` $OBJDUMP -s --section "$1" "$2" 2>/dev/null | $SED '/^Contents of section '"$match_literal"':/{ # Place marker at beginning of archive member dllname section s/.*/====MARK====/ p d } # These lines can sometimes be longer than 43 characters, but # are always uninteresting /:[ ]*file format pe[i]\{,1\}-/d /^In archive [^:]*:/d # Ensure marker is printed /^====MARK====/p # Remove all lines with less than 43 characters /^.\{43\}/!d # From remaining lines, remove first 43 characters s/^.\{43\}//' | $SED -n ' # Join marker and all lines until next marker into a single line /^====MARK====/ b para H $ b para b :para x s/\n//g # Remove the marker s/^====MARK====// # Remove trailing dots and whitespace s/[\. \t]*$// # Print /./p' | # we now have a list, one entry per line, of the stringified # contents of the appropriate section of all members of the # archive which possess that section. Heuristic: eliminate # all those which have a first or second character that is # a '.' (that is, objdump's representation of an unprintable # character.) This should work for all archives with less than # 0x302f exports -- but will fail for DLLs whose name actually # begins with a literal '.' or a single character followed by # a '.'. # # Of those that remain, print the first one. $SED -e '/^\./d;/^.\./d;q' } # func_cygming_gnu_implib_p ARG # This predicate returns with zero status (TRUE) if # ARG is a GNU/binutils-style import library. Returns # with nonzero status (FALSE) otherwise. func_cygming_gnu_implib_p () { $opt_debug func_to_tool_file "$1" func_convert_file_msys_to_w32 func_cygming_gnu_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $EGREP ' (_head_[A-Za-z0-9_]+_[ad]l*|[A-Za-z0-9_]+_[ad]l*_iname)$'` test -n "$func_cygming_gnu_implib_tmp" } # func_cygming_ms_implib_p ARG # This predicate returns with zero status (TRUE) if # ARG is an MS-style import library. Returns # with nonzero status (FALSE) otherwise. func_cygming_ms_implib_p () { $opt_debug func_to_tool_file "$1" func_convert_file_msys_to_w32 func_cygming_ms_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $GREP '_NULL_IMPORT_DESCRIPTOR'` test -n "$func_cygming_ms_implib_tmp" } # func_cygming_dll_for_implib_fallback ARG # Platform-specific function to extract the # name of the DLL associated with the specified # import library ARG. # # This fallback implementation is for use when $DLLTOOL # does not support the --identify-strict option. # Invoked by eval'ing the libtool variable # $sharedlib_from_linklib_cmd # Result is available in the variable # $sharedlib_from_linklib_result func_cygming_dll_for_implib_fallback () { $opt_debug if func_cygming_gnu_implib_p "$1" ; then # binutils import library sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$7' "$1"` elif func_cygming_ms_implib_p "$1" ; then # ms-generated import library sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$6' "$1"` else # unknown sharedlib_from_linklib_result="" fi } # func_extract_an_archive dir oldlib func_extract_an_archive () { $opt_debug f_ex_an_ar_dir="$1"; shift f_ex_an_ar_oldlib="$1" if test "$lock_old_archive_extraction" = yes; then lockfile=$f_ex_an_ar_oldlib.lock until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do func_echo "Waiting for $lockfile to be removed" sleep 2 done fi func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" \ 'stat=$?; rm -f "$lockfile"; exit $stat' if test "$lock_old_archive_extraction" = yes; then $opt_dry_run || rm -f "$lockfile" fi if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then : else func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib" fi } # func_extract_archives gentop oldlib ... func_extract_archives () { $opt_debug my_gentop="$1"; shift my_oldlibs=${1+"$@"} my_oldobjs="" my_xlib="" my_xabs="" my_xdir="" for my_xlib in $my_oldlibs; do # Extract the objects. case $my_xlib in [\\/]* | [A-Za-z]:[\\/]*) my_xabs="$my_xlib" ;; *) my_xabs=`pwd`"/$my_xlib" ;; esac func_basename "$my_xlib" my_xlib="$func_basename_result" my_xlib_u=$my_xlib while :; do case " $extracted_archives " in *" $my_xlib_u "*) func_arith $extracted_serial + 1 extracted_serial=$func_arith_result my_xlib_u=lt$extracted_serial-$my_xlib ;; *) break ;; esac done extracted_archives="$extracted_archives $my_xlib_u" my_xdir="$my_gentop/$my_xlib_u" func_mkdir_p "$my_xdir" case $host in *-darwin*) func_verbose "Extracting $my_xabs" # Do not bother doing anything if just a dry run $opt_dry_run || { darwin_orig_dir=`pwd` cd $my_xdir || exit $? darwin_archive=$my_xabs darwin_curdir=`pwd` darwin_base_archive=`basename "$darwin_archive"` darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true` if test -n "$darwin_arches"; then darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'` darwin_arch= func_verbose "$darwin_base_archive has multiple architectures $darwin_arches" for darwin_arch in $darwin_arches ; do func_mkdir_p "unfat-$$/${darwin_base_archive}-${darwin_arch}" $LIPO -thin $darwin_arch -output "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" "${darwin_archive}" cd "unfat-$$/${darwin_base_archive}-${darwin_arch}" func_extract_an_archive "`pwd`" "${darwin_base_archive}" cd "$darwin_curdir" $RM "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" done # $darwin_arches ## Okay now we've a bunch of thin objects, gotta fatten them up :) darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$basename" | sort -u` darwin_file= darwin_files= for darwin_file in $darwin_filelist; do darwin_files=`find unfat-$$ -name $darwin_file -print | sort | $NL2SP` $LIPO -create -output "$darwin_file" $darwin_files done # $darwin_filelist $RM -rf unfat-$$ cd "$darwin_orig_dir" else cd $darwin_orig_dir func_extract_an_archive "$my_xdir" "$my_xabs" fi # $darwin_arches } # !$opt_dry_run ;; *) func_extract_an_archive "$my_xdir" "$my_xabs" ;; esac my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | sort | $NL2SP` done func_extract_archives_result="$my_oldobjs" } # func_emit_wrapper [arg=no] # # Emit a libtool wrapper script on stdout. # Don't directly open a file because we may want to # incorporate the script contents within a cygwin/mingw # wrapper executable. Must ONLY be called from within # func_mode_link because it depends on a number of variables # set therein. # # ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR # variable will take. If 'yes', then the emitted script # will assume that the directory in which it is stored is # the $objdir directory. This is a cygwin/mingw-specific # behavior. func_emit_wrapper () { func_emit_wrapper_arg1=${1-no} $ECHO "\ #! $SHELL # $output - temporary wrapper script for $objdir/$outputname # Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION # # The $output program cannot be directly executed until all the libtool # libraries that it depends on are installed. # # This wrapper script should never be moved out of the build directory. # If it is, it will not operate correctly. # Sed substitution that helps us do robust quoting. It backslashifies # metacharacters that are still active within double-quoted strings. sed_quote_subst='$sed_quote_subst' # Be Bourne compatible if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then emulate sh NULLCMD=: # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which # is contrary to our usage. Disable this feature. alias -g '\${1+\"\$@\"}'='\"\$@\"' setopt NO_GLOB_SUBST else case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac fi BIN_SH=xpg4; export BIN_SH # for Tru64 DUALCASE=1; export DUALCASE # for MKS sh # The HP-UX ksh and POSIX shell print the target directory to stdout # if CDPATH is set. (unset CDPATH) >/dev/null 2>&1 && unset CDPATH relink_command=\"$relink_command\" # This environment variable determines our operation mode. if test \"\$libtool_install_magic\" = \"$magic\"; then # install mode needs the following variables: generated_by_libtool_version='$macro_version' notinst_deplibs='$notinst_deplibs' else # When we are sourced in execute mode, \$file and \$ECHO are already set. if test \"\$libtool_execute_magic\" != \"$magic\"; then file=\"\$0\"" qECHO=`$ECHO "$ECHO" | $SED "$sed_quote_subst"` $ECHO "\ # A function that is used when there is no print builtin or printf. func_fallback_echo () { eval 'cat <<_LTECHO_EOF \$1 _LTECHO_EOF' } ECHO=\"$qECHO\" fi # Very basic option parsing. These options are (a) specific to # the libtool wrapper, (b) are identical between the wrapper # /script/ and the wrapper /executable/ which is used only on # windows platforms, and (c) all begin with the string "--lt-" # (application programs are unlikely to have options which match # this pattern). # # There are only two supported options: --lt-debug and # --lt-dump-script. There is, deliberately, no --lt-help. # # The first argument to this parsing function should be the # script's $0 value, followed by "$@". lt_option_debug= func_parse_lt_options () { lt_script_arg0=\$0 shift for lt_opt do case \"\$lt_opt\" in --lt-debug) lt_option_debug=1 ;; --lt-dump-script) lt_dump_D=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%/[^/]*$%%'\` test \"X\$lt_dump_D\" = \"X\$lt_script_arg0\" && lt_dump_D=. lt_dump_F=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%^.*/%%'\` cat \"\$lt_dump_D/\$lt_dump_F\" exit 0 ;; --lt-*) \$ECHO \"Unrecognized --lt- option: '\$lt_opt'\" 1>&2 exit 1 ;; esac done # Print the debug banner immediately: if test -n \"\$lt_option_debug\"; then echo \"${outputname}:${output}:\${LINENO}: libtool wrapper (GNU $PACKAGE$TIMESTAMP) $VERSION\" 1>&2 fi } # Used when --lt-debug. Prints its arguments to stdout # (redirection is the responsibility of the caller) func_lt_dump_args () { lt_dump_args_N=1; for lt_arg do \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[\$lt_dump_args_N]: \$lt_arg\" lt_dump_args_N=\`expr \$lt_dump_args_N + 1\` done } # Core function for launching the target application func_exec_program_core () { " case $host in # Backslashes separate directories on plain windows *-*-mingw | *-*-os2* | *-cegcc*) $ECHO "\ if test -n \"\$lt_option_debug\"; then \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[0]: \$progdir\\\\\$program\" 1>&2 func_lt_dump_args \${1+\"\$@\"} 1>&2 fi exec \"\$progdir\\\\\$program\" \${1+\"\$@\"} " ;; *) $ECHO "\ if test -n \"\$lt_option_debug\"; then \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[0]: \$progdir/\$program\" 1>&2 func_lt_dump_args \${1+\"\$@\"} 1>&2 fi exec \"\$progdir/\$program\" \${1+\"\$@\"} " ;; esac $ECHO "\ \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2 exit 1 } # A function to encapsulate launching the target application # Strips options in the --lt-* namespace from \$@ and # launches target application with the remaining arguments. func_exec_program () { case \" \$* \" in *\\ --lt-*) for lt_wr_arg do case \$lt_wr_arg in --lt-*) ;; *) set x \"\$@\" \"\$lt_wr_arg\"; shift;; esac shift done ;; esac func_exec_program_core \${1+\"\$@\"} } # Parse options func_parse_lt_options \"\$0\" \${1+\"\$@\"} # Find the directory that this script lives in. thisdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*$%%'\` test \"x\$thisdir\" = \"x\$file\" && thisdir=. # Follow symbolic links until we get to the real thisdir. file=\`ls -ld \"\$file\" | $SED -n 's/.*-> //p'\` while test -n \"\$file\"; do destdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*\$%%'\` # If there was a directory component, then change thisdir. if test \"x\$destdir\" != \"x\$file\"; then case \"\$destdir\" in [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;; *) thisdir=\"\$thisdir/\$destdir\" ;; esac fi file=\`\$ECHO \"\$file\" | $SED 's%^.*/%%'\` file=\`ls -ld \"\$thisdir/\$file\" | $SED -n 's/.*-> //p'\` done # Usually 'no', except on cygwin/mingw when embedded into # the cwrapper. WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_arg1 if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then # special case for '.' if test \"\$thisdir\" = \".\"; then thisdir=\`pwd\` fi # remove .libs from thisdir case \"\$thisdir\" in *[\\\\/]$objdir ) thisdir=\`\$ECHO \"\$thisdir\" | $SED 's%[\\\\/][^\\\\/]*$%%'\` ;; $objdir ) thisdir=. ;; esac fi # Try to get the absolute directory name. absdir=\`cd \"\$thisdir\" && pwd\` test -n \"\$absdir\" && thisdir=\"\$absdir\" " if test "$fast_install" = yes; then $ECHO "\ program=lt-'$outputname'$exeext progdir=\"\$thisdir/$objdir\" if test ! -f \"\$progdir/\$program\" || { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | ${SED} 1q\`; \\ test \"X\$file\" != \"X\$progdir/\$program\"; }; then file=\"\$\$-\$program\" if test ! -d \"\$progdir\"; then $MKDIR \"\$progdir\" else $RM \"\$progdir/\$file\" fi" $ECHO "\ # relink executable if necessary if test -n \"\$relink_command\"; then if relink_command_output=\`eval \$relink_command 2>&1\`; then : else $ECHO \"\$relink_command_output\" >&2 $RM \"\$progdir/\$file\" exit 1 fi fi $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null || { $RM \"\$progdir/\$program\"; $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; } $RM \"\$progdir/\$file\" fi" else $ECHO "\ program='$outputname' progdir=\"\$thisdir/$objdir\" " fi $ECHO "\ if test -f \"\$progdir/\$program\"; then" # fixup the dll searchpath if we need to. # # Fix the DLL searchpath if we need to. Do this before prepending # to shlibpath, because on Windows, both are PATH and uninstalled # libraries must come first. if test -n "$dllsearchpath"; then $ECHO "\ # Add the dll search path components to the executable PATH PATH=$dllsearchpath:\$PATH " fi # Export our shlibpath_var if we have one. if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then $ECHO "\ # Add our own library path to $shlibpath_var $shlibpath_var=\"$temp_rpath\$$shlibpath_var\" # Some systems cannot cope with colon-terminated $shlibpath_var # The second colon is a workaround for a bug in BeOS R4 sed $shlibpath_var=\`\$ECHO \"\$$shlibpath_var\" | $SED 's/::*\$//'\` export $shlibpath_var " fi $ECHO "\ if test \"\$libtool_execute_magic\" != \"$magic\"; then # Run the actual program with our arguments. func_exec_program \${1+\"\$@\"} fi else # The program doesn't exist. \$ECHO \"\$0: error: \\\`\$progdir/\$program' does not exist\" 1>&2 \$ECHO \"This script is just a wrapper for \$program.\" 1>&2 \$ECHO \"See the $PACKAGE documentation for more information.\" 1>&2 exit 1 fi fi\ " } # func_emit_cwrapperexe_src # emit the source code for a wrapper executable on stdout # Must ONLY be called from within func_mode_link because # it depends on a number of variable set therein. func_emit_cwrapperexe_src () { cat < #include #ifdef _MSC_VER # include # include # include #else # include # include # ifdef __CYGWIN__ # include # endif #endif #include #include #include #include #include #include #include #include /* declarations of non-ANSI functions */ #if defined(__MINGW32__) # ifdef __STRICT_ANSI__ int _putenv (const char *); # endif #elif defined(__CYGWIN__) # ifdef __STRICT_ANSI__ char *realpath (const char *, char *); int putenv (char *); int setenv (const char *, const char *, int); # endif /* #elif defined (other platforms) ... */ #endif /* portability defines, excluding path handling macros */ #if defined(_MSC_VER) # define setmode _setmode # define stat _stat # define chmod _chmod # define getcwd _getcwd # define putenv _putenv # define S_IXUSR _S_IEXEC # ifndef _INTPTR_T_DEFINED # define _INTPTR_T_DEFINED # define intptr_t int # endif #elif defined(__MINGW32__) # define setmode _setmode # define stat _stat # define chmod _chmod # define getcwd _getcwd # define putenv _putenv #elif defined(__CYGWIN__) # define HAVE_SETENV # define FOPEN_WB "wb" /* #elif defined (other platforms) ... */ #endif #if defined(PATH_MAX) # define LT_PATHMAX PATH_MAX #elif defined(MAXPATHLEN) # define LT_PATHMAX MAXPATHLEN #else # define LT_PATHMAX 1024 #endif #ifndef S_IXOTH # define S_IXOTH 0 #endif #ifndef S_IXGRP # define S_IXGRP 0 #endif /* path handling portability macros */ #ifndef DIR_SEPARATOR # define DIR_SEPARATOR '/' # define PATH_SEPARATOR ':' #endif #if defined (_WIN32) || defined (__MSDOS__) || defined (__DJGPP__) || \ defined (__OS2__) # define HAVE_DOS_BASED_FILE_SYSTEM # define FOPEN_WB "wb" # ifndef DIR_SEPARATOR_2 # define DIR_SEPARATOR_2 '\\' # endif # ifndef PATH_SEPARATOR_2 # define PATH_SEPARATOR_2 ';' # endif #endif #ifndef DIR_SEPARATOR_2 # define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) #else /* DIR_SEPARATOR_2 */ # define IS_DIR_SEPARATOR(ch) \ (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) #endif /* DIR_SEPARATOR_2 */ #ifndef PATH_SEPARATOR_2 # define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR) #else /* PATH_SEPARATOR_2 */ # define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2) #endif /* PATH_SEPARATOR_2 */ #ifndef FOPEN_WB # define FOPEN_WB "w" #endif #ifndef _O_BINARY # define _O_BINARY 0 #endif #define XMALLOC(type, num) ((type *) xmalloc ((num) * sizeof(type))) #define XFREE(stale) do { \ if (stale) { free ((void *) stale); stale = 0; } \ } while (0) #if defined(LT_DEBUGWRAPPER) static int lt_debug = 1; #else static int lt_debug = 0; #endif const char *program_name = "libtool-wrapper"; /* in case xstrdup fails */ void *xmalloc (size_t num); char *xstrdup (const char *string); const char *base_name (const char *name); char *find_executable (const char *wrapper); char *chase_symlinks (const char *pathspec); int make_executable (const char *path); int check_executable (const char *path); char *strendzap (char *str, const char *pat); void lt_debugprintf (const char *file, int line, const char *fmt, ...); void lt_fatal (const char *file, int line, const char *message, ...); static const char *nonnull (const char *s); static const char *nonempty (const char *s); void lt_setenv (const char *name, const char *value); char *lt_extend_str (const char *orig_value, const char *add, int to_end); void lt_update_exe_path (const char *name, const char *value); void lt_update_lib_path (const char *name, const char *value); char **prepare_spawn (char **argv); void lt_dump_script (FILE *f); EOF cat <= 0) && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return 1; else return 0; } int make_executable (const char *path) { int rval = 0; struct stat st; lt_debugprintf (__FILE__, __LINE__, "(make_executable): %s\n", nonempty (path)); if ((!path) || (!*path)) return 0; if (stat (path, &st) >= 0) { rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR); } return rval; } /* Searches for the full path of the wrapper. Returns newly allocated full path name if found, NULL otherwise Does not chase symlinks, even on platforms that support them. */ char * find_executable (const char *wrapper) { int has_slash = 0; const char *p; const char *p_next; /* static buffer for getcwd */ char tmp[LT_PATHMAX + 1]; int tmp_len; char *concat_name; lt_debugprintf (__FILE__, __LINE__, "(find_executable): %s\n", nonempty (wrapper)); if ((wrapper == NULL) || (*wrapper == '\0')) return NULL; /* Absolute path? */ #if defined (HAVE_DOS_BASED_FILE_SYSTEM) if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':') { concat_name = xstrdup (wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } else { #endif if (IS_DIR_SEPARATOR (wrapper[0])) { concat_name = xstrdup (wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } #if defined (HAVE_DOS_BASED_FILE_SYSTEM) } #endif for (p = wrapper; *p; p++) if (*p == '/') { has_slash = 1; break; } if (!has_slash) { /* no slashes; search PATH */ const char *path = getenv ("PATH"); if (path != NULL) { for (p = path; *p; p = p_next) { const char *q; size_t p_len; for (q = p; *q; q++) if (IS_PATH_SEPARATOR (*q)) break; p_len = q - p; p_next = (*q == '\0' ? q : q + 1); if (p_len == 0) { /* empty path: current directory */ if (getcwd (tmp, LT_PATHMAX) == NULL) lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", nonnull (strerror (errno))); tmp_len = strlen (tmp); concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, tmp, tmp_len); concat_name[tmp_len] = '/'; strcpy (concat_name + tmp_len + 1, wrapper); } else { concat_name = XMALLOC (char, p_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, p, p_len); concat_name[p_len] = '/'; strcpy (concat_name + p_len + 1, wrapper); } if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } } /* not found in PATH; assume curdir */ } /* Relative path | not found in path: prepend cwd */ if (getcwd (tmp, LT_PATHMAX) == NULL) lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", nonnull (strerror (errno))); tmp_len = strlen (tmp); concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, tmp, tmp_len); concat_name[tmp_len] = '/'; strcpy (concat_name + tmp_len + 1, wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); return NULL; } char * chase_symlinks (const char *pathspec) { #ifndef S_ISLNK return xstrdup (pathspec); #else char buf[LT_PATHMAX]; struct stat s; char *tmp_pathspec = xstrdup (pathspec); char *p; int has_symlinks = 0; while (strlen (tmp_pathspec) && !has_symlinks) { lt_debugprintf (__FILE__, __LINE__, "checking path component for symlinks: %s\n", tmp_pathspec); if (lstat (tmp_pathspec, &s) == 0) { if (S_ISLNK (s.st_mode) != 0) { has_symlinks = 1; break; } /* search backwards for last DIR_SEPARATOR */ p = tmp_pathspec + strlen (tmp_pathspec) - 1; while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) p--; if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) { /* no more DIR_SEPARATORS left */ break; } *p = '\0'; } else { lt_fatal (__FILE__, __LINE__, "error accessing file \"%s\": %s", tmp_pathspec, nonnull (strerror (errno))); } } XFREE (tmp_pathspec); if (!has_symlinks) { return xstrdup (pathspec); } tmp_pathspec = realpath (pathspec, buf); if (tmp_pathspec == 0) { lt_fatal (__FILE__, __LINE__, "could not follow symlinks for %s", pathspec); } return xstrdup (tmp_pathspec); #endif } char * strendzap (char *str, const char *pat) { size_t len, patlen; assert (str != NULL); assert (pat != NULL); len = strlen (str); patlen = strlen (pat); if (patlen <= len) { str += len - patlen; if (strcmp (str, pat) == 0) *str = '\0'; } return str; } void lt_debugprintf (const char *file, int line, const char *fmt, ...) { va_list args; if (lt_debug) { (void) fprintf (stderr, "%s:%s:%d: ", program_name, file, line); va_start (args, fmt); (void) vfprintf (stderr, fmt, args); va_end (args); } } static void lt_error_core (int exit_status, const char *file, int line, const char *mode, const char *message, va_list ap) { fprintf (stderr, "%s:%s:%d: %s: ", program_name, file, line, mode); vfprintf (stderr, message, ap); fprintf (stderr, ".\n"); if (exit_status >= 0) exit (exit_status); } void lt_fatal (const char *file, int line, const char *message, ...) { va_list ap; va_start (ap, message); lt_error_core (EXIT_FAILURE, file, line, "FATAL", message, ap); va_end (ap); } static const char * nonnull (const char *s) { return s ? s : "(null)"; } static const char * nonempty (const char *s) { return (s && !*s) ? "(empty)" : nonnull (s); } void lt_setenv (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_setenv) setting '%s' to '%s'\n", nonnull (name), nonnull (value)); { #ifdef HAVE_SETENV /* always make a copy, for consistency with !HAVE_SETENV */ char *str = xstrdup (value); setenv (name, str, 1); #else int len = strlen (name) + 1 + strlen (value) + 1; char *str = XMALLOC (char, len); sprintf (str, "%s=%s", name, value); if (putenv (str) != EXIT_SUCCESS) { XFREE (str); } #endif } } char * lt_extend_str (const char *orig_value, const char *add, int to_end) { char *new_value; if (orig_value && *orig_value) { int orig_value_len = strlen (orig_value); int add_len = strlen (add); new_value = XMALLOC (char, add_len + orig_value_len + 1); if (to_end) { strcpy (new_value, orig_value); strcpy (new_value + orig_value_len, add); } else { strcpy (new_value, add); strcpy (new_value + add_len, orig_value); } } else { new_value = xstrdup (add); } return new_value; } void lt_update_exe_path (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_update_exe_path) modifying '%s' by prepending '%s'\n", nonnull (name), nonnull (value)); if (name && *name && value && *value) { char *new_value = lt_extend_str (getenv (name), value, 0); /* some systems can't cope with a ':'-terminated path #' */ int len = strlen (new_value); while (((len = strlen (new_value)) > 0) && IS_PATH_SEPARATOR (new_value[len-1])) { new_value[len-1] = '\0'; } lt_setenv (name, new_value); XFREE (new_value); } } void lt_update_lib_path (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_update_lib_path) modifying '%s' by prepending '%s'\n", nonnull (name), nonnull (value)); if (name && *name && value && *value) { char *new_value = lt_extend_str (getenv (name), value, 0); lt_setenv (name, new_value); XFREE (new_value); } } EOF case $host_os in mingw*) cat <<"EOF" /* Prepares an argument vector before calling spawn(). Note that spawn() does not by itself call the command interpreter (getenv ("COMSPEC") != NULL ? getenv ("COMSPEC") : ({ OSVERSIONINFO v; v.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); GetVersionEx(&v); v.dwPlatformId == VER_PLATFORM_WIN32_NT; }) ? "cmd.exe" : "command.com"). Instead it simply concatenates the arguments, separated by ' ', and calls CreateProcess(). We must quote the arguments since Win32 CreateProcess() interprets characters like ' ', '\t', '\\', '"' (but not '<' and '>') in a special way: - Space and tab are interpreted as delimiters. They are not treated as delimiters if they are surrounded by double quotes: "...". - Unescaped double quotes are removed from the input. Their only effect is that within double quotes, space and tab are treated like normal characters. - Backslashes not followed by double quotes are not special. - But 2*n+1 backslashes followed by a double quote become n backslashes followed by a double quote (n >= 0): \" -> " \\\" -> \" \\\\\" -> \\" */ #define SHELL_SPECIAL_CHARS "\"\\ \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" #define SHELL_SPACE_CHARS " \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" char ** prepare_spawn (char **argv) { size_t argc; char **new_argv; size_t i; /* Count number of arguments. */ for (argc = 0; argv[argc] != NULL; argc++) ; /* Allocate new argument vector. */ new_argv = XMALLOC (char *, argc + 1); /* Put quoted arguments into the new argument vector. */ for (i = 0; i < argc; i++) { const char *string = argv[i]; if (string[0] == '\0') new_argv[i] = xstrdup ("\"\""); else if (strpbrk (string, SHELL_SPECIAL_CHARS) != NULL) { int quote_around = (strpbrk (string, SHELL_SPACE_CHARS) != NULL); size_t length; unsigned int backslashes; const char *s; char *quoted_string; char *p; length = 0; backslashes = 0; if (quote_around) length++; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') length += backslashes + 1; length++; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) length += backslashes + 1; quoted_string = XMALLOC (char, length + 1); p = quoted_string; backslashes = 0; if (quote_around) *p++ = '"'; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') { unsigned int j; for (j = backslashes + 1; j > 0; j--) *p++ = '\\'; } *p++ = c; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) { unsigned int j; for (j = backslashes; j > 0; j--) *p++ = '\\'; *p++ = '"'; } *p = '\0'; new_argv[i] = quoted_string; } else new_argv[i] = (char *) string; } new_argv[argc] = NULL; return new_argv; } EOF ;; esac cat <<"EOF" void lt_dump_script (FILE* f) { EOF func_emit_wrapper yes | $SED -n -e ' s/^\(.\{79\}\)\(..*\)/\1\ \2/ h s/\([\\"]\)/\\\1/g s/$/\\n/ s/\([^\n]*\).*/ fputs ("\1", f);/p g D' cat <<"EOF" } EOF } # end: func_emit_cwrapperexe_src # func_win32_import_lib_p ARG # True if ARG is an import lib, as indicated by $file_magic_cmd func_win32_import_lib_p () { $opt_debug case `eval $file_magic_cmd \"\$1\" 2>/dev/null | $SED -e 10q` in *import*) : ;; *) false ;; esac } # func_mode_link arg... func_mode_link () { $opt_debug case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) # It is impossible to link a dll without this setting, and # we shouldn't force the makefile maintainer to figure out # which system we are compiling for in order to pass an extra # flag for every libtool invocation. # allow_undefined=no # FIXME: Unfortunately, there are problems with the above when trying # to make a dll which has undefined symbols, in which case not # even a static library is built. For now, we need to specify # -no-undefined on the libtool link line when we can be certain # that all symbols are satisfied, otherwise we get a static library. allow_undefined=yes ;; *) allow_undefined=yes ;; esac libtool_args=$nonopt base_compile="$nonopt $@" compile_command=$nonopt finalize_command=$nonopt compile_rpath= finalize_rpath= compile_shlibpath= finalize_shlibpath= convenience= old_convenience= deplibs= old_deplibs= compiler_flags= linker_flags= dllsearchpath= lib_search_path=`pwd` inst_prefix_dir= new_inherited_linker_flags= avoid_version=no bindir= dlfiles= dlprefiles= dlself=no export_dynamic=no export_symbols= export_symbols_regex= generated= libobjs= ltlibs= module=no no_install=no objs= non_pic_objects= precious_files_regex= prefer_static_libs=no preload=no prev= prevarg= release= rpath= xrpath= perm_rpath= temp_rpath= thread_safe=no vinfo= vinfo_number=no weak_libs= single_module="${wl}-single_module" func_infer_tag $base_compile # We need to know -static, to get the right output filenames. for arg do case $arg in -shared) test "$build_libtool_libs" != yes && \ func_fatal_configuration "can not build a shared library" build_old_libs=no break ;; -all-static | -static | -static-libtool-libs) case $arg in -all-static) if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then func_warning "complete static linking is impossible in this configuration" fi if test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=yes ;; -static) if test -z "$pic_flag" && test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=built ;; -static-libtool-libs) if test -z "$pic_flag" && test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=yes ;; esac build_libtool_libs=no build_old_libs=yes break ;; esac done # See if our shared archives depend on static archives. test -n "$old_archive_from_new_cmds" && build_old_libs=yes # Go through the arguments, transforming them on the way. while test "$#" -gt 0; do arg="$1" shift func_quote_for_eval "$arg" qarg=$func_quote_for_eval_unquoted_result func_append libtool_args " $func_quote_for_eval_result" # If the previous option needs an argument, assign it. if test -n "$prev"; then case $prev in output) func_append compile_command " @OUTPUT@" func_append finalize_command " @OUTPUT@" ;; esac case $prev in bindir) bindir="$arg" prev= continue ;; dlfiles|dlprefiles) if test "$preload" = no; then # Add the symbol object into the linking commands. func_append compile_command " @SYMFILE@" func_append finalize_command " @SYMFILE@" preload=yes fi case $arg in *.la | *.lo) ;; # We handle these cases below. force) if test "$dlself" = no; then dlself=needless export_dynamic=yes fi prev= continue ;; self) if test "$prev" = dlprefiles; then dlself=yes elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then dlself=yes else dlself=needless export_dynamic=yes fi prev= continue ;; *) if test "$prev" = dlfiles; then func_append dlfiles " $arg" else func_append dlprefiles " $arg" fi prev= continue ;; esac ;; expsyms) export_symbols="$arg" test -f "$arg" \ || func_fatal_error "symbol file \`$arg' does not exist" prev= continue ;; expsyms_regex) export_symbols_regex="$arg" prev= continue ;; framework) case $host in *-*-darwin*) case "$deplibs " in *" $qarg.ltframework "*) ;; *) func_append deplibs " $qarg.ltframework" # this is fixed later ;; esac ;; esac prev= continue ;; inst_prefix) inst_prefix_dir="$arg" prev= continue ;; objectlist) if test -f "$arg"; then save_arg=$arg moreargs= for fil in `cat "$save_arg"` do # func_append moreargs " $fil" arg=$fil # A libtool-controlled object. # Check to see that this really is a libtool object. if func_lalib_unsafe_p "$arg"; then pic_object= non_pic_object= # Read the .lo file func_source "$arg" if test -z "$pic_object" || test -z "$non_pic_object" || test "$pic_object" = none && test "$non_pic_object" = none; then func_fatal_error "cannot find name of object for \`$arg'" fi # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir="$func_dirname_result" if test "$pic_object" != none; then # Prepend the subdirectory the object is found in. pic_object="$xdir$pic_object" if test "$prev" = dlfiles; then if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then func_append dlfiles " $pic_object" prev= continue else # If libtool objects are unsupported, then we need to preload. prev=dlprefiles fi fi # CHECK ME: I think I busted this. -Ossama if test "$prev" = dlprefiles; then # Preload the old-style object. func_append dlprefiles " $pic_object" prev= fi # A PIC object. func_append libobjs " $pic_object" arg="$pic_object" fi # Non-PIC object. if test "$non_pic_object" != none; then # Prepend the subdirectory the object is found in. non_pic_object="$xdir$non_pic_object" # A standard non-PIC object func_append non_pic_objects " $non_pic_object" if test -z "$pic_object" || test "$pic_object" = none ; then arg="$non_pic_object" fi else # If the PIC object exists, use it instead. # $xdir was prepended to $pic_object above. non_pic_object="$pic_object" func_append non_pic_objects " $non_pic_object" fi else # Only an error if not doing a dry-run. if $opt_dry_run; then # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir="$func_dirname_result" func_lo2o "$arg" pic_object=$xdir$objdir/$func_lo2o_result non_pic_object=$xdir$func_lo2o_result func_append libobjs " $pic_object" func_append non_pic_objects " $non_pic_object" else func_fatal_error "\`$arg' is not a valid libtool object" fi fi done else func_fatal_error "link input file \`$arg' does not exist" fi arg=$save_arg prev= continue ;; precious_regex) precious_files_regex="$arg" prev= continue ;; release) release="-$arg" prev= continue ;; rpath | xrpath) # We need an absolute path. case $arg in [\\/]* | [A-Za-z]:[\\/]*) ;; *) func_fatal_error "only absolute run-paths are allowed" ;; esac if test "$prev" = rpath; then case "$rpath " in *" $arg "*) ;; *) func_append rpath " $arg" ;; esac else case "$xrpath " in *" $arg "*) ;; *) func_append xrpath " $arg" ;; esac fi prev= continue ;; shrext) shrext_cmds="$arg" prev= continue ;; weak) func_append weak_libs " $arg" prev= continue ;; xcclinker) func_append linker_flags " $qarg" func_append compiler_flags " $qarg" prev= func_append compile_command " $qarg" func_append finalize_command " $qarg" continue ;; xcompiler) func_append compiler_flags " $qarg" prev= func_append compile_command " $qarg" func_append finalize_command " $qarg" continue ;; xlinker) func_append linker_flags " $qarg" func_append compiler_flags " $wl$qarg" prev= func_append compile_command " $wl$qarg" func_append finalize_command " $wl$qarg" continue ;; *) eval "$prev=\"\$arg\"" prev= continue ;; esac fi # test -n "$prev" prevarg="$arg" case $arg in -all-static) if test -n "$link_static_flag"; then # See comment for -static flag below, for more details. func_append compile_command " $link_static_flag" func_append finalize_command " $link_static_flag" fi continue ;; -allow-undefined) # FIXME: remove this flag sometime in the future. func_fatal_error "\`-allow-undefined' must not be used because it is the default" ;; -avoid-version) avoid_version=yes continue ;; -bindir) prev=bindir continue ;; -dlopen) prev=dlfiles continue ;; -dlpreopen) prev=dlprefiles continue ;; -export-dynamic) export_dynamic=yes continue ;; -export-symbols | -export-symbols-regex) if test -n "$export_symbols" || test -n "$export_symbols_regex"; then func_fatal_error "more than one -exported-symbols argument is not allowed" fi if test "X$arg" = "X-export-symbols"; then prev=expsyms else prev=expsyms_regex fi continue ;; -framework) prev=framework continue ;; -inst-prefix-dir) prev=inst_prefix continue ;; # The native IRIX linker understands -LANG:*, -LIST:* and -LNO:* # so, if we see these flags be careful not to treat them like -L -L[A-Z][A-Z]*:*) case $with_gcc/$host in no/*-*-irix* | /*-*-irix*) func_append compile_command " $arg" func_append finalize_command " $arg" ;; esac continue ;; -L*) func_stripname "-L" '' "$arg" if test -z "$func_stripname_result"; then if test "$#" -gt 0; then func_fatal_error "require no space between \`-L' and \`$1'" else func_fatal_error "need path for \`-L' option" fi fi func_resolve_sysroot "$func_stripname_result" dir=$func_resolve_sysroot_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) ;; *) absdir=`cd "$dir" && pwd` test -z "$absdir" && \ func_fatal_error "cannot determine absolute directory name of \`$dir'" dir="$absdir" ;; esac case "$deplibs " in *" -L$dir "* | *" $arg "*) # Will only happen for absolute or sysroot arguments ;; *) # Preserve sysroot, but never include relative directories case $dir in [\\/]* | [A-Za-z]:[\\/]* | =*) func_append deplibs " $arg" ;; *) func_append deplibs " -L$dir" ;; esac func_append lib_search_path " $dir" ;; esac case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) testbindir=`$ECHO "$dir" | $SED 's*/lib$*/bin*'` case :$dllsearchpath: in *":$dir:"*) ;; ::) dllsearchpath=$dir;; *) func_append dllsearchpath ":$dir";; esac case :$dllsearchpath: in *":$testbindir:"*) ;; ::) dllsearchpath=$testbindir;; *) func_append dllsearchpath ":$testbindir";; esac ;; esac continue ;; -l*) if test "X$arg" = "X-lc" || test "X$arg" = "X-lm"; then case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-beos* | *-cegcc* | *-*-haiku*) # These systems don't actually have a C or math library (as such) continue ;; *-*-os2*) # These systems don't actually have a C library (as such) test "X$arg" = "X-lc" && continue ;; *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*) # Do not include libc due to us having libc/libc_r. test "X$arg" = "X-lc" && continue ;; *-*-rhapsody* | *-*-darwin1.[012]) # Rhapsody C and math libraries are in the System framework func_append deplibs " System.ltframework" continue ;; *-*-sco3.2v5* | *-*-sco5v6*) # Causes problems with __ctype test "X$arg" = "X-lc" && continue ;; *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*) # Compiler inserts libc in the correct place for threads to work test "X$arg" = "X-lc" && continue ;; esac elif test "X$arg" = "X-lc_r"; then case $host in *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*) # Do not include libc_r directly, use -pthread flag. continue ;; esac fi func_append deplibs " $arg" continue ;; -module) module=yes continue ;; # Tru64 UNIX uses -model [arg] to determine the layout of C++ # classes, name mangling, and exception handling. # Darwin uses the -arch flag to determine output architecture. -model|-arch|-isysroot|--sysroot) func_append compiler_flags " $arg" func_append compile_command " $arg" func_append finalize_command " $arg" prev=xcompiler continue ;; -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \ |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*) func_append compiler_flags " $arg" func_append compile_command " $arg" func_append finalize_command " $arg" case "$new_inherited_linker_flags " in *" $arg "*) ;; * ) func_append new_inherited_linker_flags " $arg" ;; esac continue ;; -multi_module) single_module="${wl}-multi_module" continue ;; -no-fast-install) fast_install=no continue ;; -no-install) case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-darwin* | *-cegcc*) # The PATH hackery in wrapper scripts is required on Windows # and Darwin in order for the loader to find any dlls it needs. func_warning "\`-no-install' is ignored for $host" func_warning "assuming \`-no-fast-install' instead" fast_install=no ;; *) no_install=yes ;; esac continue ;; -no-undefined) allow_undefined=no continue ;; -objectlist) prev=objectlist continue ;; -o) prev=output ;; -precious-files-regex) prev=precious_regex continue ;; -release) prev=release continue ;; -rpath) prev=rpath continue ;; -R) prev=xrpath continue ;; -R*) func_stripname '-R' '' "$arg" dir=$func_stripname_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) ;; =*) func_stripname '=' '' "$dir" dir=$lt_sysroot$func_stripname_result ;; *) func_fatal_error "only absolute run-paths are allowed" ;; esac case "$xrpath " in *" $dir "*) ;; *) func_append xrpath " $dir" ;; esac continue ;; -shared) # The effects of -shared are defined in a previous loop. continue ;; -shrext) prev=shrext continue ;; -static | -static-libtool-libs) # The effects of -static are defined in a previous loop. # We used to do the same as -all-static on platforms that # didn't have a PIC flag, but the assumption that the effects # would be equivalent was wrong. It would break on at least # Digital Unix and AIX. continue ;; -thread-safe) thread_safe=yes continue ;; -version-info) prev=vinfo continue ;; -version-number) prev=vinfo vinfo_number=yes continue ;; -weak) prev=weak continue ;; -Wc,*) func_stripname '-Wc,' '' "$arg" args=$func_stripname_result arg= save_ifs="$IFS"; IFS=',' for flag in $args; do IFS="$save_ifs" func_quote_for_eval "$flag" func_append arg " $func_quote_for_eval_result" func_append compiler_flags " $func_quote_for_eval_result" done IFS="$save_ifs" func_stripname ' ' '' "$arg" arg=$func_stripname_result ;; -Wl,*) func_stripname '-Wl,' '' "$arg" args=$func_stripname_result arg= save_ifs="$IFS"; IFS=',' for flag in $args; do IFS="$save_ifs" func_quote_for_eval "$flag" func_append arg " $wl$func_quote_for_eval_result" func_append compiler_flags " $wl$func_quote_for_eval_result" func_append linker_flags " $func_quote_for_eval_result" done IFS="$save_ifs" func_stripname ' ' '' "$arg" arg=$func_stripname_result ;; -Xcompiler) prev=xcompiler continue ;; -Xlinker) prev=xlinker continue ;; -XCClinker) prev=xcclinker continue ;; # -msg_* for osf cc -msg_*) func_quote_for_eval "$arg" arg="$func_quote_for_eval_result" ;; # Flags to be passed through unchanged, with rationale: # -64, -mips[0-9] enable 64-bit mode for the SGI compiler # -r[0-9][0-9]* specify processor for the SGI compiler # -xarch=*, -xtarget=* enable 64-bit mode for the Sun compiler # +DA*, +DD* enable 64-bit mode for the HP compiler # -q* compiler args for the IBM compiler # -m*, -t[45]*, -txscale* architecture-specific flags for GCC # -F/path path to uninstalled frameworks, gcc on darwin # -p, -pg, --coverage, -fprofile-* profiling flags for GCC # @file GCC response files # -tp=* Portland pgcc target processor selection # --sysroot=* for sysroot support # -O*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \ -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \ -O*|-flto*|-fwhopr*|-fuse-linker-plugin) func_quote_for_eval "$arg" arg="$func_quote_for_eval_result" func_append compile_command " $arg" func_append finalize_command " $arg" func_append compiler_flags " $arg" continue ;; # Some other compiler flag. -* | +*) func_quote_for_eval "$arg" arg="$func_quote_for_eval_result" ;; *.$objext) # A standard object. func_append objs " $arg" ;; *.lo) # A libtool-controlled object. # Check to see that this really is a libtool object. if func_lalib_unsafe_p "$arg"; then pic_object= non_pic_object= # Read the .lo file func_source "$arg" if test -z "$pic_object" || test -z "$non_pic_object" || test "$pic_object" = none && test "$non_pic_object" = none; then func_fatal_error "cannot find name of object for \`$arg'" fi # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir="$func_dirname_result" if test "$pic_object" != none; then # Prepend the subdirectory the object is found in. pic_object="$xdir$pic_object" if test "$prev" = dlfiles; then if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then func_append dlfiles " $pic_object" prev= continue else # If libtool objects are unsupported, then we need to preload. prev=dlprefiles fi fi # CHECK ME: I think I busted this. -Ossama if test "$prev" = dlprefiles; then # Preload the old-style object. func_append dlprefiles " $pic_object" prev= fi # A PIC object. func_append libobjs " $pic_object" arg="$pic_object" fi # Non-PIC object. if test "$non_pic_object" != none; then # Prepend the subdirectory the object is found in. non_pic_object="$xdir$non_pic_object" # A standard non-PIC object func_append non_pic_objects " $non_pic_object" if test -z "$pic_object" || test "$pic_object" = none ; then arg="$non_pic_object" fi else # If the PIC object exists, use it instead. # $xdir was prepended to $pic_object above. non_pic_object="$pic_object" func_append non_pic_objects " $non_pic_object" fi else # Only an error if not doing a dry-run. if $opt_dry_run; then # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir="$func_dirname_result" func_lo2o "$arg" pic_object=$xdir$objdir/$func_lo2o_result non_pic_object=$xdir$func_lo2o_result func_append libobjs " $pic_object" func_append non_pic_objects " $non_pic_object" else func_fatal_error "\`$arg' is not a valid libtool object" fi fi ;; *.$libext) # An archive. func_append deplibs " $arg" func_append old_deplibs " $arg" continue ;; *.la) # A libtool-controlled library. func_resolve_sysroot "$arg" if test "$prev" = dlfiles; then # This library was specified with -dlopen. func_append dlfiles " $func_resolve_sysroot_result" prev= elif test "$prev" = dlprefiles; then # The library was specified with -dlpreopen. func_append dlprefiles " $func_resolve_sysroot_result" prev= else func_append deplibs " $func_resolve_sysroot_result" fi continue ;; # Some other compiler argument. *) # Unknown arguments in both finalize_command and compile_command need # to be aesthetically quoted because they are evaled later. func_quote_for_eval "$arg" arg="$func_quote_for_eval_result" ;; esac # arg # Now actually substitute the argument into the commands. if test -n "$arg"; then func_append compile_command " $arg" func_append finalize_command " $arg" fi done # argument parsing loop test -n "$prev" && \ func_fatal_help "the \`$prevarg' option requires an argument" if test "$export_dynamic" = yes && test -n "$export_dynamic_flag_spec"; then eval arg=\"$export_dynamic_flag_spec\" func_append compile_command " $arg" func_append finalize_command " $arg" fi oldlibs= # calculate the name of the file, without its directory func_basename "$output" outputname="$func_basename_result" libobjs_save="$libobjs" if test -n "$shlibpath_var"; then # get the directories listed in $shlibpath_var eval shlib_search_path=\`\$ECHO \"\${$shlibpath_var}\" \| \$SED \'s/:/ /g\'\` else shlib_search_path= fi eval sys_lib_search_path=\"$sys_lib_search_path_spec\" eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\" func_dirname "$output" "/" "" output_objdir="$func_dirname_result$objdir" func_to_tool_file "$output_objdir/" tool_output_objdir=$func_to_tool_file_result # Create the object directory. func_mkdir_p "$output_objdir" # Determine the type of output case $output in "") func_fatal_help "you must specify an output file" ;; *.$libext) linkmode=oldlib ;; *.lo | *.$objext) linkmode=obj ;; *.la) linkmode=lib ;; *) linkmode=prog ;; # Anything else should be a program. esac specialdeplibs= libs= # Find all interdependent deplibs by searching for libraries # that are linked more than once (e.g. -la -lb -la) for deplib in $deplibs; do if $opt_preserve_dup_deps ; then case "$libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append libs " $deplib" done if test "$linkmode" = lib; then libs="$predeps $libs $compiler_lib_search_path $postdeps" # Compute libraries that are listed more than once in $predeps # $postdeps and mark them as special (i.e., whose duplicates are # not to be eliminated). pre_post_deps= if $opt_duplicate_compiler_generated_deps; then for pre_post_dep in $predeps $postdeps; do case "$pre_post_deps " in *" $pre_post_dep "*) func_append specialdeplibs " $pre_post_deps" ;; esac func_append pre_post_deps " $pre_post_dep" done fi pre_post_deps= fi deplibs= newdependency_libs= newlib_search_path= need_relink=no # whether we're linking any uninstalled libtool libraries notinst_deplibs= # not-installed libtool libraries notinst_path= # paths that contain not-installed libtool libraries case $linkmode in lib) passes="conv dlpreopen link" for file in $dlfiles $dlprefiles; do case $file in *.la) ;; *) func_fatal_help "libraries can \`-dlopen' only libtool libraries: $file" ;; esac done ;; prog) compile_deplibs= finalize_deplibs= alldeplibs=no newdlfiles= newdlprefiles= passes="conv scan dlopen dlpreopen link" ;; *) passes="conv" ;; esac for pass in $passes; do # The preopen pass in lib mode reverses $deplibs; put it back here # so that -L comes before libs that need it for instance... if test "$linkmode,$pass" = "lib,link"; then ## FIXME: Find the place where the list is rebuilt in the wrong ## order, and fix it there properly tmp_deplibs= for deplib in $deplibs; do tmp_deplibs="$deplib $tmp_deplibs" done deplibs="$tmp_deplibs" fi if test "$linkmode,$pass" = "lib,link" || test "$linkmode,$pass" = "prog,scan"; then libs="$deplibs" deplibs= fi if test "$linkmode" = prog; then case $pass in dlopen) libs="$dlfiles" ;; dlpreopen) libs="$dlprefiles" ;; link) libs="$deplibs %DEPLIBS% $dependency_libs" ;; esac fi if test "$linkmode,$pass" = "lib,dlpreopen"; then # Collect and forward deplibs of preopened libtool libs for lib in $dlprefiles; do # Ignore non-libtool-libs dependency_libs= func_resolve_sysroot "$lib" case $lib in *.la) func_source "$func_resolve_sysroot_result" ;; esac # Collect preopened libtool deplibs, except any this library # has declared as weak libs for deplib in $dependency_libs; do func_basename "$deplib" deplib_base=$func_basename_result case " $weak_libs " in *" $deplib_base "*) ;; *) func_append deplibs " $deplib" ;; esac done done libs="$dlprefiles" fi if test "$pass" = dlopen; then # Collect dlpreopened libraries save_deplibs="$deplibs" deplibs= fi for deplib in $libs; do lib= found=no case $deplib in -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \ |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*) if test "$linkmode,$pass" = "prog,link"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else func_append compiler_flags " $deplib" if test "$linkmode" = lib ; then case "$new_inherited_linker_flags " in *" $deplib "*) ;; * ) func_append new_inherited_linker_flags " $deplib" ;; esac fi fi continue ;; -l*) if test "$linkmode" != lib && test "$linkmode" != prog; then func_warning "\`-l' is ignored for archives/objects" continue fi func_stripname '-l' '' "$deplib" name=$func_stripname_result if test "$linkmode" = lib; then searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path" else searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path" fi for searchdir in $searchdirs; do for search_ext in .la $std_shrext .so .a; do # Search the libtool library lib="$searchdir/lib${name}${search_ext}" if test -f "$lib"; then if test "$search_ext" = ".la"; then found=yes else found=no fi break 2 fi done done if test "$found" != yes; then # deplib doesn't seem to be a libtool library if test "$linkmode,$pass" = "prog,link"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs" fi continue else # deplib is a libtool library # If $allow_libtool_libs_with_static_runtimes && $deplib is a stdlib, # We need to do some special things here, and not later. if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then case " $predeps $postdeps " in *" $deplib "*) if func_lalib_p "$lib"; then library_names= old_library= func_source "$lib" for l in $old_library $library_names; do ll="$l" done if test "X$ll" = "X$old_library" ; then # only static version available found=no func_dirname "$lib" "" "." ladir="$func_dirname_result" lib=$ladir/$old_library if test "$linkmode,$pass" = "prog,link"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs" fi continue fi fi ;; *) ;; esac fi fi ;; # -l *.ltframework) if test "$linkmode,$pass" = "prog,link"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" if test "$linkmode" = lib ; then case "$new_inherited_linker_flags " in *" $deplib "*) ;; * ) func_append new_inherited_linker_flags " $deplib" ;; esac fi fi continue ;; -L*) case $linkmode in lib) deplibs="$deplib $deplibs" test "$pass" = conv && continue newdependency_libs="$deplib $newdependency_libs" func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; prog) if test "$pass" = conv; then deplibs="$deplib $deplibs" continue fi if test "$pass" = scan; then deplibs="$deplib $deplibs" else compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" fi func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; *) func_warning "\`-L' is ignored for archives/objects" ;; esac # linkmode continue ;; # -L -R*) if test "$pass" = link; then func_stripname '-R' '' "$deplib" func_resolve_sysroot "$func_stripname_result" dir=$func_resolve_sysroot_result # Make sure the xrpath contains only unique directories. case "$xrpath " in *" $dir "*) ;; *) func_append xrpath " $dir" ;; esac fi deplibs="$deplib $deplibs" continue ;; *.la) func_resolve_sysroot "$deplib" lib=$func_resolve_sysroot_result ;; *.$libext) if test "$pass" = conv; then deplibs="$deplib $deplibs" continue fi case $linkmode in lib) # Linking convenience modules into shared libraries is allowed, # but linking other static libraries is non-portable. case " $dlpreconveniencelibs " in *" $deplib "*) ;; *) valid_a_lib=no case $deplibs_check_method in match_pattern*) set dummy $deplibs_check_method; shift match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"` if eval "\$ECHO \"$deplib\"" 2>/dev/null | $SED 10q \ | $EGREP "$match_pattern_regex" > /dev/null; then valid_a_lib=yes fi ;; pass_all) valid_a_lib=yes ;; esac if test "$valid_a_lib" != yes; then echo $ECHO "*** Warning: Trying to link with static lib archive $deplib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because the file extensions .$libext of this argument makes me believe" echo "*** that it is just a static archive that I should not use here." else echo $ECHO "*** Warning: Linking the shared library $output against the" $ECHO "*** static library $deplib is not portable!" deplibs="$deplib $deplibs" fi ;; esac continue ;; prog) if test "$pass" != link; then deplibs="$deplib $deplibs" else compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" fi continue ;; esac # linkmode ;; # *.$libext *.lo | *.$objext) if test "$pass" = conv; then deplibs="$deplib $deplibs" elif test "$linkmode" = prog; then if test "$pass" = dlpreopen || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then # If there is no dlopen support or we're linking statically, # we need to preload. func_append newdlprefiles " $deplib" compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else func_append newdlfiles " $deplib" fi fi continue ;; %DEPLIBS%) alldeplibs=yes continue ;; esac # case $deplib if test "$found" = yes || test -f "$lib"; then : else func_fatal_error "cannot find the library \`$lib' or unhandled argument \`$deplib'" fi # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$lib" \ || func_fatal_error "\`$lib' is not a valid libtool archive" func_dirname "$lib" "" "." ladir="$func_dirname_result" dlname= dlopen= dlpreopen= libdir= library_names= old_library= inherited_linker_flags= # If the library was installed with an old release of libtool, # it will not redefine variables installed, or shouldnotlink installed=yes shouldnotlink=no avoidtemprpath= # Read the .la file func_source "$lib" # Convert "-framework foo" to "foo.ltframework" if test -n "$inherited_linker_flags"; then tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g'` for tmp_inherited_linker_flag in $tmp_inherited_linker_flags; do case " $new_inherited_linker_flags " in *" $tmp_inherited_linker_flag "*) ;; *) func_append new_inherited_linker_flags " $tmp_inherited_linker_flag";; esac done fi dependency_libs=`$ECHO " $dependency_libs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` if test "$linkmode,$pass" = "lib,link" || test "$linkmode,$pass" = "prog,scan" || { test "$linkmode" != prog && test "$linkmode" != lib; }; then test -n "$dlopen" && func_append dlfiles " $dlopen" test -n "$dlpreopen" && func_append dlprefiles " $dlpreopen" fi if test "$pass" = conv; then # Only check for convenience libraries deplibs="$lib $deplibs" if test -z "$libdir"; then if test -z "$old_library"; then func_fatal_error "cannot find name of link library for \`$lib'" fi # It is a libtool convenience library, so add in its objects. func_append convenience " $ladir/$objdir/$old_library" func_append old_convenience " $ladir/$objdir/$old_library" elif test "$linkmode" != prog && test "$linkmode" != lib; then func_fatal_error "\`$lib' is not a convenience library" fi tmp_libs= for deplib in $dependency_libs; do deplibs="$deplib $deplibs" if $opt_preserve_dup_deps ; then case "$tmp_libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append tmp_libs " $deplib" done continue fi # $pass = conv # Get the name of the library we link against. linklib= if test -n "$old_library" && { test "$prefer_static_libs" = yes || test "$prefer_static_libs,$installed" = "built,no"; }; then linklib=$old_library else for l in $old_library $library_names; do linklib="$l" done fi if test -z "$linklib"; then func_fatal_error "cannot find name of link library for \`$lib'" fi # This library was specified with -dlopen. if test "$pass" = dlopen; then if test -z "$libdir"; then func_fatal_error "cannot -dlopen a convenience library: \`$lib'" fi if test -z "$dlname" || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then # If there is no dlname, no dlopen support or we're linking # statically, we need to preload. We also need to preload any # dependent libraries so libltdl's deplib preloader doesn't # bomb out in the load deplibs phase. func_append dlprefiles " $lib $dependency_libs" else func_append newdlfiles " $lib" fi continue fi # $pass = dlopen # We need an absolute path. case $ladir in [\\/]* | [A-Za-z]:[\\/]*) abs_ladir="$ladir" ;; *) abs_ladir=`cd "$ladir" && pwd` if test -z "$abs_ladir"; then func_warning "cannot determine absolute directory name of \`$ladir'" func_warning "passing it literally to the linker, although it might fail" abs_ladir="$ladir" fi ;; esac func_basename "$lib" laname="$func_basename_result" # Find the relevant object directory and library name. if test "X$installed" = Xyes; then if test ! -f "$lt_sysroot$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then func_warning "library \`$lib' was moved." dir="$ladir" absdir="$abs_ladir" libdir="$abs_ladir" else dir="$lt_sysroot$libdir" absdir="$lt_sysroot$libdir" fi test "X$hardcode_automatic" = Xyes && avoidtemprpath=yes else if test ! -f "$ladir/$objdir/$linklib" && test -f "$abs_ladir/$linklib"; then dir="$ladir" absdir="$abs_ladir" # Remove this search path later func_append notinst_path " $abs_ladir" else dir="$ladir/$objdir" absdir="$abs_ladir/$objdir" # Remove this search path later func_append notinst_path " $abs_ladir" fi fi # $installed = yes func_stripname 'lib' '.la' "$laname" name=$func_stripname_result # This library was specified with -dlpreopen. if test "$pass" = dlpreopen; then if test -z "$libdir" && test "$linkmode" = prog; then func_fatal_error "only libraries may -dlpreopen a convenience library: \`$lib'" fi case "$host" in # special handling for platforms with PE-DLLs. *cygwin* | *mingw* | *cegcc* ) # Linker will automatically link against shared library if both # static and shared are present. Therefore, ensure we extract # symbols from the import library if a shared library is present # (otherwise, the dlopen module name will be incorrect). We do # this by putting the import library name into $newdlprefiles. # We recover the dlopen module name by 'saving' the la file # name in a special purpose variable, and (later) extracting the # dlname from the la file. if test -n "$dlname"; then func_tr_sh "$dir/$linklib" eval "libfile_$func_tr_sh_result=\$abs_ladir/\$laname" func_append newdlprefiles " $dir/$linklib" else func_append newdlprefiles " $dir/$old_library" # Keep a list of preopened convenience libraries to check # that they are being used correctly in the link pass. test -z "$libdir" && \ func_append dlpreconveniencelibs " $dir/$old_library" fi ;; * ) # Prefer using a static library (so that no silly _DYNAMIC symbols # are required to link). if test -n "$old_library"; then func_append newdlprefiles " $dir/$old_library" # Keep a list of preopened convenience libraries to check # that they are being used correctly in the link pass. test -z "$libdir" && \ func_append dlpreconveniencelibs " $dir/$old_library" # Otherwise, use the dlname, so that lt_dlopen finds it. elif test -n "$dlname"; then func_append newdlprefiles " $dir/$dlname" else func_append newdlprefiles " $dir/$linklib" fi ;; esac fi # $pass = dlpreopen if test -z "$libdir"; then # Link the convenience library if test "$linkmode" = lib; then deplibs="$dir/$old_library $deplibs" elif test "$linkmode,$pass" = "prog,link"; then compile_deplibs="$dir/$old_library $compile_deplibs" finalize_deplibs="$dir/$old_library $finalize_deplibs" else deplibs="$lib $deplibs" # used for prog,scan pass fi continue fi if test "$linkmode" = prog && test "$pass" != link; then func_append newlib_search_path " $ladir" deplibs="$lib $deplibs" linkalldeplibs=no if test "$link_all_deplibs" != no || test -z "$library_names" || test "$build_libtool_libs" = no; then linkalldeplibs=yes fi tmp_libs= for deplib in $dependency_libs; do case $deplib in -L*) func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; esac # Need to link against all dependency_libs? if test "$linkalldeplibs" = yes; then deplibs="$deplib $deplibs" else # Need to hardcode shared library paths # or/and link against static libraries newdependency_libs="$deplib $newdependency_libs" fi if $opt_preserve_dup_deps ; then case "$tmp_libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append tmp_libs " $deplib" done # for deplib continue fi # $linkmode = prog... if test "$linkmode,$pass" = "prog,link"; then if test -n "$library_names" && { { test "$prefer_static_libs" = no || test "$prefer_static_libs,$installed" = "built,yes"; } || test -z "$old_library"; }; then # We need to hardcode the library path if test -n "$shlibpath_var" && test -z "$avoidtemprpath" ; then # Make sure the rpath contains only unique directories. case "$temp_rpath:" in *"$absdir:"*) ;; *) func_append temp_rpath "$absdir:" ;; esac fi # Hardcode the library path. # Skip directories that are in the system default run-time # search path. case " $sys_lib_dlsearch_path " in *" $absdir "*) ;; *) case "$compile_rpath " in *" $absdir "*) ;; *) func_append compile_rpath " $absdir" ;; esac ;; esac case " $sys_lib_dlsearch_path " in *" $libdir "*) ;; *) case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac ;; esac fi # $linkmode,$pass = prog,link... if test "$alldeplibs" = yes && { test "$deplibs_check_method" = pass_all || { test "$build_libtool_libs" = yes && test -n "$library_names"; }; }; then # We only need to search for static libraries continue fi fi link_static=no # Whether the deplib will be linked statically use_static_libs=$prefer_static_libs if test "$use_static_libs" = built && test "$installed" = yes; then use_static_libs=no fi if test -n "$library_names" && { test "$use_static_libs" = no || test -z "$old_library"; }; then case $host in *cygwin* | *mingw* | *cegcc*) # No point in relinking DLLs because paths are not encoded func_append notinst_deplibs " $lib" need_relink=no ;; *) if test "$installed" = no; then func_append notinst_deplibs " $lib" need_relink=yes fi ;; esac # This is a shared library # Warn about portability, can't link against -module's on some # systems (darwin). Don't bleat about dlopened modules though! dlopenmodule="" for dlpremoduletest in $dlprefiles; do if test "X$dlpremoduletest" = "X$lib"; then dlopenmodule="$dlpremoduletest" break fi done if test -z "$dlopenmodule" && test "$shouldnotlink" = yes && test "$pass" = link; then echo if test "$linkmode" = prog; then $ECHO "*** Warning: Linking the executable $output against the loadable module" else $ECHO "*** Warning: Linking the shared library $output against the loadable module" fi $ECHO "*** $linklib is not portable!" fi if test "$linkmode" = lib && test "$hardcode_into_libs" = yes; then # Hardcode the library path. # Skip directories that are in the system default run-time # search path. case " $sys_lib_dlsearch_path " in *" $absdir "*) ;; *) case "$compile_rpath " in *" $absdir "*) ;; *) func_append compile_rpath " $absdir" ;; esac ;; esac case " $sys_lib_dlsearch_path " in *" $libdir "*) ;; *) case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac ;; esac fi if test -n "$old_archive_from_expsyms_cmds"; then # figure out the soname set dummy $library_names shift realname="$1" shift libname=`eval "\\$ECHO \"$libname_spec\""` # use dlname if we got it. it's perfectly good, no? if test -n "$dlname"; then soname="$dlname" elif test -n "$soname_spec"; then # bleh windows case $host in *cygwin* | mingw* | *cegcc*) func_arith $current - $age major=$func_arith_result versuffix="-$major" ;; esac eval soname=\"$soname_spec\" else soname="$realname" fi # Make a new name for the extract_expsyms_cmds to use soroot="$soname" func_basename "$soroot" soname="$func_basename_result" func_stripname 'lib' '.dll' "$soname" newlib=libimp-$func_stripname_result.a # If the library has no export list, then create one now if test -f "$output_objdir/$soname-def"; then : else func_verbose "extracting exported symbol list from \`$soname'" func_execute_cmds "$extract_expsyms_cmds" 'exit $?' fi # Create $newlib if test -f "$output_objdir/$newlib"; then :; else func_verbose "generating import library for \`$soname'" func_execute_cmds "$old_archive_from_expsyms_cmds" 'exit $?' fi # make sure the library variables are pointing to the new library dir=$output_objdir linklib=$newlib fi # test -n "$old_archive_from_expsyms_cmds" if test "$linkmode" = prog || test "$opt_mode" != relink; then add_shlibpath= add_dir= add= lib_linked=yes case $hardcode_action in immediate | unsupported) if test "$hardcode_direct" = no; then add="$dir/$linklib" case $host in *-*-sco3.2v5.0.[024]*) add_dir="-L$dir" ;; *-*-sysv4*uw2*) add_dir="-L$dir" ;; *-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \ *-*-unixware7*) add_dir="-L$dir" ;; *-*-darwin* ) # if the lib is a (non-dlopened) module then we can not # link against it, someone is ignoring the earlier warnings if /usr/bin/file -L $add 2> /dev/null | $GREP ": [^:]* bundle" >/dev/null ; then if test "X$dlopenmodule" != "X$lib"; then $ECHO "*** Warning: lib $linklib is a module, not a shared library" if test -z "$old_library" ; then echo echo "*** And there doesn't seem to be a static archive available" echo "*** The link will probably fail, sorry" else add="$dir/$old_library" fi elif test -n "$old_library"; then add="$dir/$old_library" fi fi esac elif test "$hardcode_minus_L" = no; then case $host in *-*-sunos*) add_shlibpath="$dir" ;; esac add_dir="-L$dir" add="-l$name" elif test "$hardcode_shlibpath_var" = no; then add_shlibpath="$dir" add="-l$name" else lib_linked=no fi ;; relink) if test "$hardcode_direct" = yes && test "$hardcode_direct_absolute" = no; then add="$dir/$linklib" elif test "$hardcode_minus_L" = yes; then add_dir="-L$absdir" # Try looking first in the location we're being installed to. if test -n "$inst_prefix_dir"; then case $libdir in [\\/]*) func_append add_dir " -L$inst_prefix_dir$libdir" ;; esac fi add="-l$name" elif test "$hardcode_shlibpath_var" = yes; then add_shlibpath="$dir" add="-l$name" else lib_linked=no fi ;; *) lib_linked=no ;; esac if test "$lib_linked" != yes; then func_fatal_configuration "unsupported hardcode properties" fi if test -n "$add_shlibpath"; then case :$compile_shlibpath: in *":$add_shlibpath:"*) ;; *) func_append compile_shlibpath "$add_shlibpath:" ;; esac fi if test "$linkmode" = prog; then test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs" test -n "$add" && compile_deplibs="$add $compile_deplibs" else test -n "$add_dir" && deplibs="$add_dir $deplibs" test -n "$add" && deplibs="$add $deplibs" if test "$hardcode_direct" != yes && test "$hardcode_minus_L" != yes && test "$hardcode_shlibpath_var" = yes; then case :$finalize_shlibpath: in *":$libdir:"*) ;; *) func_append finalize_shlibpath "$libdir:" ;; esac fi fi fi if test "$linkmode" = prog || test "$opt_mode" = relink; then add_shlibpath= add_dir= add= # Finalize command for both is simple: just hardcode it. if test "$hardcode_direct" = yes && test "$hardcode_direct_absolute" = no; then add="$libdir/$linklib" elif test "$hardcode_minus_L" = yes; then add_dir="-L$libdir" add="-l$name" elif test "$hardcode_shlibpath_var" = yes; then case :$finalize_shlibpath: in *":$libdir:"*) ;; *) func_append finalize_shlibpath "$libdir:" ;; esac add="-l$name" elif test "$hardcode_automatic" = yes; then if test -n "$inst_prefix_dir" && test -f "$inst_prefix_dir$libdir/$linklib" ; then add="$inst_prefix_dir$libdir/$linklib" else add="$libdir/$linklib" fi else # We cannot seem to hardcode it, guess we'll fake it. add_dir="-L$libdir" # Try looking first in the location we're being installed to. if test -n "$inst_prefix_dir"; then case $libdir in [\\/]*) func_append add_dir " -L$inst_prefix_dir$libdir" ;; esac fi add="-l$name" fi if test "$linkmode" = prog; then test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs" test -n "$add" && finalize_deplibs="$add $finalize_deplibs" else test -n "$add_dir" && deplibs="$add_dir $deplibs" test -n "$add" && deplibs="$add $deplibs" fi fi elif test "$linkmode" = prog; then # Here we assume that one of hardcode_direct or hardcode_minus_L # is not unsupported. This is valid on all known static and # shared platforms. if test "$hardcode_direct" != unsupported; then test -n "$old_library" && linklib="$old_library" compile_deplibs="$dir/$linklib $compile_deplibs" finalize_deplibs="$dir/$linklib $finalize_deplibs" else compile_deplibs="-l$name -L$dir $compile_deplibs" finalize_deplibs="-l$name -L$dir $finalize_deplibs" fi elif test "$build_libtool_libs" = yes; then # Not a shared library if test "$deplibs_check_method" != pass_all; then # We're trying link a shared library against a static one # but the system doesn't support it. # Just print a warning and add the library to dependency_libs so # that the program can be linked against the static library. echo $ECHO "*** Warning: This system can not link to static lib archive $lib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have." if test "$module" = yes; then echo "*** But as you try to build a module library, libtool will still create " echo "*** a static module, that should work as long as the dlopening application" echo "*** is linked with the -dlopen flag to resolve symbols at runtime." if test -z "$global_symbol_pipe"; then echo echo "*** However, this would only work if libtool was able to extract symbol" echo "*** lists from a program, using \`nm' or equivalent, but libtool could" echo "*** not find such a program. So, this module is probably useless." echo "*** \`nm' from GNU binutils and a full rebuild may help." fi if test "$build_old_libs" = no; then build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi fi else deplibs="$dir/$old_library $deplibs" link_static=yes fi fi # link shared/static library? if test "$linkmode" = lib; then if test -n "$dependency_libs" && { test "$hardcode_into_libs" != yes || test "$build_old_libs" = yes || test "$link_static" = yes; }; then # Extract -R from dependency_libs temp_deplibs= for libdir in $dependency_libs; do case $libdir in -R*) func_stripname '-R' '' "$libdir" temp_xrpath=$func_stripname_result case " $xrpath " in *" $temp_xrpath "*) ;; *) func_append xrpath " $temp_xrpath";; esac;; *) func_append temp_deplibs " $libdir";; esac done dependency_libs="$temp_deplibs" fi func_append newlib_search_path " $absdir" # Link against this library test "$link_static" = no && newdependency_libs="$abs_ladir/$laname $newdependency_libs" # ... and its dependency_libs tmp_libs= for deplib in $dependency_libs; do newdependency_libs="$deplib $newdependency_libs" case $deplib in -L*) func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result";; *) func_resolve_sysroot "$deplib" ;; esac if $opt_preserve_dup_deps ; then case "$tmp_libs " in *" $func_resolve_sysroot_result "*) func_append specialdeplibs " $func_resolve_sysroot_result" ;; esac fi func_append tmp_libs " $func_resolve_sysroot_result" done if test "$link_all_deplibs" != no; then # Add the search paths of all dependency libraries for deplib in $dependency_libs; do path= case $deplib in -L*) path="$deplib" ;; *.la) func_resolve_sysroot "$deplib" deplib=$func_resolve_sysroot_result func_dirname "$deplib" "" "." dir=$func_dirname_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) absdir="$dir" ;; *) absdir=`cd "$dir" && pwd` if test -z "$absdir"; then func_warning "cannot determine absolute directory name of \`$dir'" absdir="$dir" fi ;; esac if $GREP "^installed=no" $deplib > /dev/null; then case $host in *-*-darwin*) depdepl= eval deplibrary_names=`${SED} -n -e 's/^library_names=\(.*\)$/\1/p' $deplib` if test -n "$deplibrary_names" ; then for tmp in $deplibrary_names ; do depdepl=$tmp done if test -f "$absdir/$objdir/$depdepl" ; then depdepl="$absdir/$objdir/$depdepl" darwin_install_name=`${OTOOL} -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` if test -z "$darwin_install_name"; then darwin_install_name=`${OTOOL64} -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` fi func_append compiler_flags " ${wl}-dylib_file ${wl}${darwin_install_name}:${depdepl}" func_append linker_flags " -dylib_file ${darwin_install_name}:${depdepl}" path= fi fi ;; *) path="-L$absdir/$objdir" ;; esac else eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib` test -z "$libdir" && \ func_fatal_error "\`$deplib' is not a valid libtool archive" test "$absdir" != "$libdir" && \ func_warning "\`$deplib' seems to be moved" path="-L$absdir" fi ;; esac case " $deplibs " in *" $path "*) ;; *) deplibs="$path $deplibs" ;; esac done fi # link_all_deplibs != no fi # linkmode = lib done # for deplib in $libs if test "$pass" = link; then if test "$linkmode" = "prog"; then compile_deplibs="$new_inherited_linker_flags $compile_deplibs" finalize_deplibs="$new_inherited_linker_flags $finalize_deplibs" else compiler_flags="$compiler_flags "`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` fi fi dependency_libs="$newdependency_libs" if test "$pass" = dlpreopen; then # Link the dlpreopened libraries before other libraries for deplib in $save_deplibs; do deplibs="$deplib $deplibs" done fi if test "$pass" != dlopen; then if test "$pass" != conv; then # Make sure lib_search_path contains only unique directories. lib_search_path= for dir in $newlib_search_path; do case "$lib_search_path " in *" $dir "*) ;; *) func_append lib_search_path " $dir" ;; esac done newlib_search_path= fi if test "$linkmode,$pass" != "prog,link"; then vars="deplibs" else vars="compile_deplibs finalize_deplibs" fi for var in $vars dependency_libs; do # Add libraries to $var in reverse order eval tmp_libs=\"\$$var\" new_libs= for deplib in $tmp_libs; do # FIXME: Pedantically, this is the right thing to do, so # that some nasty dependency loop isn't accidentally # broken: #new_libs="$deplib $new_libs" # Pragmatically, this seems to cause very few problems in # practice: case $deplib in -L*) new_libs="$deplib $new_libs" ;; -R*) ;; *) # And here is the reason: when a library appears more # than once as an explicit dependence of a library, or # is implicitly linked in more than once by the # compiler, it is considered special, and multiple # occurrences thereof are not removed. Compare this # with having the same library being listed as a # dependency of multiple other libraries: in this case, # we know (pedantically, we assume) the library does not # need to be listed more than once, so we keep only the # last copy. This is not always right, but it is rare # enough that we require users that really mean to play # such unportable linking tricks to link the library # using -Wl,-lname, so that libtool does not consider it # for duplicate removal. case " $specialdeplibs " in *" $deplib "*) new_libs="$deplib $new_libs" ;; *) case " $new_libs " in *" $deplib "*) ;; *) new_libs="$deplib $new_libs" ;; esac ;; esac ;; esac done tmp_libs= for deplib in $new_libs; do case $deplib in -L*) case " $tmp_libs " in *" $deplib "*) ;; *) func_append tmp_libs " $deplib" ;; esac ;; *) func_append tmp_libs " $deplib" ;; esac done eval $var=\"$tmp_libs\" done # for var fi # Last step: remove runtime libs from dependency_libs # (they stay in deplibs) tmp_libs= for i in $dependency_libs ; do case " $predeps $postdeps $compiler_lib_search_path " in *" $i "*) i="" ;; esac if test -n "$i" ; then func_append tmp_libs " $i" fi done dependency_libs=$tmp_libs done # for pass if test "$linkmode" = prog; then dlfiles="$newdlfiles" fi if test "$linkmode" = prog || test "$linkmode" = lib; then dlprefiles="$newdlprefiles" fi case $linkmode in oldlib) if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then func_warning "\`-dlopen' is ignored for archives" fi case " $deplibs" in *\ -l* | *\ -L*) func_warning "\`-l' and \`-L' are ignored for archives" ;; esac test -n "$rpath" && \ func_warning "\`-rpath' is ignored for archives" test -n "$xrpath" && \ func_warning "\`-R' is ignored for archives" test -n "$vinfo" && \ func_warning "\`-version-info/-version-number' is ignored for archives" test -n "$release" && \ func_warning "\`-release' is ignored for archives" test -n "$export_symbols$export_symbols_regex" && \ func_warning "\`-export-symbols' is ignored for archives" # Now set the variables for building old libraries. build_libtool_libs=no oldlibs="$output" func_append objs "$old_deplibs" ;; lib) # Make sure we only generate libraries of the form `libNAME.la'. case $outputname in lib*) func_stripname 'lib' '.la' "$outputname" name=$func_stripname_result eval shared_ext=\"$shrext_cmds\" eval libname=\"$libname_spec\" ;; *) test "$module" = no && \ func_fatal_help "libtool library \`$output' must begin with \`lib'" if test "$need_lib_prefix" != no; then # Add the "lib" prefix for modules if required func_stripname '' '.la' "$outputname" name=$func_stripname_result eval shared_ext=\"$shrext_cmds\" eval libname=\"$libname_spec\" else func_stripname '' '.la' "$outputname" libname=$func_stripname_result fi ;; esac if test -n "$objs"; then if test "$deplibs_check_method" != pass_all; then func_fatal_error "cannot build libtool library \`$output' from non-libtool objects on this host:$objs" else echo $ECHO "*** Warning: Linking the shared library $output against the non-libtool" $ECHO "*** objects $objs is not portable!" func_append libobjs " $objs" fi fi test "$dlself" != no && \ func_warning "\`-dlopen self' is ignored for libtool libraries" set dummy $rpath shift test "$#" -gt 1 && \ func_warning "ignoring multiple \`-rpath's for a libtool library" install_libdir="$1" oldlibs= if test -z "$rpath"; then if test "$build_libtool_libs" = yes; then # Building a libtool convenience library. # Some compilers have problems with a `.al' extension so # convenience libraries should have the same extension an # archive normally would. oldlibs="$output_objdir/$libname.$libext $oldlibs" build_libtool_libs=convenience build_old_libs=yes fi test -n "$vinfo" && \ func_warning "\`-version-info/-version-number' is ignored for convenience libraries" test -n "$release" && \ func_warning "\`-release' is ignored for convenience libraries" else # Parse the version information argument. save_ifs="$IFS"; IFS=':' set dummy $vinfo 0 0 0 shift IFS="$save_ifs" test -n "$7" && \ func_fatal_help "too many parameters to \`-version-info'" # convert absolute version numbers to libtool ages # this retains compatibility with .la files and attempts # to make the code below a bit more comprehensible case $vinfo_number in yes) number_major="$1" number_minor="$2" number_revision="$3" # # There are really only two kinds -- those that # use the current revision as the major version # and those that subtract age and use age as # a minor version. But, then there is irix # which has an extra 1 added just for fun # case $version_type in # correct linux to gnu/linux during the next big refactor darwin|linux|osf|windows|none) func_arith $number_major + $number_minor current=$func_arith_result age="$number_minor" revision="$number_revision" ;; freebsd-aout|freebsd-elf|qnx|sunos) current="$number_major" revision="$number_minor" age="0" ;; irix|nonstopux) func_arith $number_major + $number_minor current=$func_arith_result age="$number_minor" revision="$number_minor" lt_irix_increment=no ;; esac ;; no) current="$1" revision="$2" age="$3" ;; esac # Check that each of the things are valid numbers. case $current in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "CURRENT \`$current' must be a nonnegative integer" func_fatal_error "\`$vinfo' is not valid version information" ;; esac case $revision in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "REVISION \`$revision' must be a nonnegative integer" func_fatal_error "\`$vinfo' is not valid version information" ;; esac case $age in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "AGE \`$age' must be a nonnegative integer" func_fatal_error "\`$vinfo' is not valid version information" ;; esac if test "$age" -gt "$current"; then func_error "AGE \`$age' is greater than the current interface number \`$current'" func_fatal_error "\`$vinfo' is not valid version information" fi # Calculate the version variables. major= versuffix= verstring= case $version_type in none) ;; darwin) # Like Linux, but with the current version available in # verstring for coding it into the library header func_arith $current - $age major=.$func_arith_result versuffix="$major.$age.$revision" # Darwin ld doesn't like 0 for these options... func_arith $current + 1 minor_current=$func_arith_result xlcverstring="${wl}-compatibility_version ${wl}$minor_current ${wl}-current_version ${wl}$minor_current.$revision" verstring="-compatibility_version $minor_current -current_version $minor_current.$revision" ;; freebsd-aout) major=".$current" versuffix=".$current.$revision"; ;; freebsd-elf) major=".$current" versuffix=".$current" ;; irix | nonstopux) if test "X$lt_irix_increment" = "Xno"; then func_arith $current - $age else func_arith $current - $age + 1 fi major=$func_arith_result case $version_type in nonstopux) verstring_prefix=nonstopux ;; *) verstring_prefix=sgi ;; esac verstring="$verstring_prefix$major.$revision" # Add in all the interfaces that we are compatible with. loop=$revision while test "$loop" -ne 0; do func_arith $revision - $loop iface=$func_arith_result func_arith $loop - 1 loop=$func_arith_result verstring="$verstring_prefix$major.$iface:$verstring" done # Before this point, $major must not contain `.'. major=.$major versuffix="$major.$revision" ;; linux) # correct to gnu/linux during the next big refactor func_arith $current - $age major=.$func_arith_result versuffix="$major.$age.$revision" ;; osf) func_arith $current - $age major=.$func_arith_result versuffix=".$current.$age.$revision" verstring="$current.$age.$revision" # Add in all the interfaces that we are compatible with. loop=$age while test "$loop" -ne 0; do func_arith $current - $loop iface=$func_arith_result func_arith $loop - 1 loop=$func_arith_result verstring="$verstring:${iface}.0" done # Make executables depend on our current version. func_append verstring ":${current}.0" ;; qnx) major=".$current" versuffix=".$current" ;; sunos) major=".$current" versuffix=".$current.$revision" ;; windows) # Use '-' rather than '.', since we only want one # extension on DOS 8.3 filesystems. func_arith $current - $age major=$func_arith_result versuffix="-$major" ;; *) func_fatal_configuration "unknown library version type \`$version_type'" ;; esac # Clear the version info if we defaulted, and they specified a release. if test -z "$vinfo" && test -n "$release"; then major= case $version_type in darwin) # we can't check for "0.0" in archive_cmds due to quoting # problems, so we reset it completely verstring= ;; *) verstring="0.0" ;; esac if test "$need_version" = no; then versuffix= else versuffix=".0.0" fi fi # Remove version info from name if versioning should be avoided if test "$avoid_version" = yes && test "$need_version" = no; then major= versuffix= verstring="" fi # Check to see if the archive will have undefined symbols. if test "$allow_undefined" = yes; then if test "$allow_undefined_flag" = unsupported; then func_warning "undefined symbols not allowed in $host shared libraries" build_libtool_libs=no build_old_libs=yes fi else # Don't allow undefined symbols. allow_undefined_flag="$no_undefined_flag" fi fi func_generate_dlsyms "$libname" "$libname" "yes" func_append libobjs " $symfileobj" test "X$libobjs" = "X " && libobjs= if test "$opt_mode" != relink; then # Remove our outputs, but don't remove object files since they # may have been created when compiling PIC objects. removelist= tempremovelist=`$ECHO "$output_objdir/*"` for p in $tempremovelist; do case $p in *.$objext | *.gcno) ;; $output_objdir/$outputname | $output_objdir/$libname.* | $output_objdir/${libname}${release}.*) if test "X$precious_files_regex" != "X"; then if $ECHO "$p" | $EGREP -e "$precious_files_regex" >/dev/null 2>&1 then continue fi fi func_append removelist " $p" ;; *) ;; esac done test -n "$removelist" && \ func_show_eval "${RM}r \$removelist" fi # Now set the variables for building old libraries. if test "$build_old_libs" = yes && test "$build_libtool_libs" != convenience ; then func_append oldlibs " $output_objdir/$libname.$libext" # Transform .lo files to .o files. oldobjs="$objs "`$ECHO "$libobjs" | $SP2NL | $SED "/\.${libext}$/d; $lo2o" | $NL2SP` fi # Eliminate all temporary directories. #for path in $notinst_path; do # lib_search_path=`$ECHO "$lib_search_path " | $SED "s% $path % %g"` # deplibs=`$ECHO "$deplibs " | $SED "s% -L$path % %g"` # dependency_libs=`$ECHO "$dependency_libs " | $SED "s% -L$path % %g"` #done if test -n "$xrpath"; then # If the user specified any rpath flags, then add them. temp_xrpath= for libdir in $xrpath; do func_replace_sysroot "$libdir" func_append temp_xrpath " -R$func_replace_sysroot_result" case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac done if test "$hardcode_into_libs" != yes || test "$build_old_libs" = yes; then dependency_libs="$temp_xrpath $dependency_libs" fi fi # Make sure dlfiles contains only unique files that won't be dlpreopened old_dlfiles="$dlfiles" dlfiles= for lib in $old_dlfiles; do case " $dlprefiles $dlfiles " in *" $lib "*) ;; *) func_append dlfiles " $lib" ;; esac done # Make sure dlprefiles contains only unique files old_dlprefiles="$dlprefiles" dlprefiles= for lib in $old_dlprefiles; do case "$dlprefiles " in *" $lib "*) ;; *) func_append dlprefiles " $lib" ;; esac done if test "$build_libtool_libs" = yes; then if test -n "$rpath"; then case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-beos* | *-cegcc* | *-*-haiku*) # these systems don't actually have a c library (as such)! ;; *-*-rhapsody* | *-*-darwin1.[012]) # Rhapsody C library is in the System framework func_append deplibs " System.ltframework" ;; *-*-netbsd*) # Don't link with libc until the a.out ld.so is fixed. ;; *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*) # Do not include libc due to us having libc/libc_r. ;; *-*-sco3.2v5* | *-*-sco5v6*) # Causes problems with __ctype ;; *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*) # Compiler inserts libc in the correct place for threads to work ;; *) # Add libc to deplibs on all other systems if necessary. if test "$build_libtool_need_lc" = "yes"; then func_append deplibs " -lc" fi ;; esac fi # Transform deplibs into only deplibs that can be linked in shared. name_save=$name libname_save=$libname release_save=$release versuffix_save=$versuffix major_save=$major # I'm not sure if I'm treating the release correctly. I think # release should show up in the -l (ie -lgmp5) so we don't want to # add it in twice. Is that correct? release="" versuffix="" major="" newdeplibs= droppeddeps=no case $deplibs_check_method in pass_all) # Don't check for shared/static. Everything works. # This might be a little naive. We might want to check # whether the library exists or not. But this is on # osf3 & osf4 and I'm not really sure... Just # implementing what was already the behavior. newdeplibs=$deplibs ;; test_compile) # This code stresses the "libraries are programs" paradigm to its # limits. Maybe even breaks it. We compile a program, linking it # against the deplibs as a proxy for the library. Then we can check # whether they linked in statically or dynamically with ldd. $opt_dry_run || $RM conftest.c cat > conftest.c </dev/null` $nocaseglob else potential_libs=`ls $i/$libnameglob[.-]* 2>/dev/null` fi for potent_lib in $potential_libs; do # Follow soft links. if ls -lLd "$potent_lib" 2>/dev/null | $GREP " -> " >/dev/null; then continue fi # The statement above tries to avoid entering an # endless loop below, in case of cyclic links. # We might still enter an endless loop, since a link # loop can be closed while we follow links, # but so what? potlib="$potent_lib" while test -h "$potlib" 2>/dev/null; do potliblink=`ls -ld $potlib | ${SED} 's/.* -> //'` case $potliblink in [\\/]* | [A-Za-z]:[\\/]*) potlib="$potliblink";; *) potlib=`$ECHO "$potlib" | $SED 's,[^/]*$,,'`"$potliblink";; esac done if eval $file_magic_cmd \"\$potlib\" 2>/dev/null | $SED -e 10q | $EGREP "$file_magic_regex" > /dev/null; then func_append newdeplibs " $a_deplib" a_deplib="" break 2 fi done done fi if test -n "$a_deplib" ; then droppeddeps=yes echo $ECHO "*** Warning: linker path does not have real file for library $a_deplib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because I did check the linker path looking for a file starting" if test -z "$potlib" ; then $ECHO "*** with $libname but no candidates were found. (...for file magic test)" else $ECHO "*** with $libname and none of the candidates passed a file format test" $ECHO "*** using a file magic. 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But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because I did check the linker path looking for a file starting" if test -z "$potlib" ; then $ECHO "*** with $libname but no candidates were found. (...for regex pattern test)" else $ECHO "*** with $libname and none of the candidates passed a file format test" $ECHO "*** using a regex pattern. Last file checked: $potlib" fi fi ;; *) # Add a -L argument. func_append newdeplibs " $a_deplib" ;; esac done # Gone through all deplibs. ;; none | unknown | *) newdeplibs="" tmp_deplibs=`$ECHO " $deplibs" | $SED 's/ -lc$//; s/ -[LR][^ ]*//g'` if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then for i in $predeps $postdeps ; do # can't use Xsed below, because $i might contain '/' tmp_deplibs=`$ECHO " $tmp_deplibs" | $SED "s,$i,,"` done fi case $tmp_deplibs in *[!\ \ ]*) echo if test "X$deplibs_check_method" = "Xnone"; then echo "*** Warning: inter-library dependencies are not supported in this platform." else echo "*** Warning: inter-library dependencies are not known to be supported." fi echo "*** All declared inter-library dependencies are being dropped." droppeddeps=yes ;; esac ;; esac versuffix=$versuffix_save major=$major_save release=$release_save libname=$libname_save name=$name_save case $host in *-*-rhapsody* | *-*-darwin1.[012]) # On Rhapsody replace the C library with the System framework newdeplibs=`$ECHO " $newdeplibs" | $SED 's/ -lc / System.ltframework /'` ;; esac if test "$droppeddeps" = yes; then if test "$module" = yes; then echo echo "*** Warning: libtool could not satisfy all declared inter-library" $ECHO "*** dependencies of module $libname. Therefore, libtool will create" echo "*** a static module, that should work as long as the dlopening" echo "*** application is linked with the -dlopen flag." if test -z "$global_symbol_pipe"; then echo echo "*** However, this would only work if libtool was able to extract symbol" echo "*** lists from a program, using \`nm' or equivalent, but libtool could" echo "*** not find such a program. So, this module is probably useless." echo "*** \`nm' from GNU binutils and a full rebuild may help." fi if test "$build_old_libs" = no; then oldlibs="$output_objdir/$libname.$libext" build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi else echo "*** The inter-library dependencies that have been dropped here will be" echo "*** automatically added whenever a program is linked with this library" echo "*** or is declared to -dlopen it." if test "$allow_undefined" = no; then echo echo "*** Since this library must not contain undefined symbols," echo "*** because either the platform does not support them or" echo "*** it was explicitly requested with -no-undefined," echo "*** libtool will only create a static version of it." if test "$build_old_libs" = no; then oldlibs="$output_objdir/$libname.$libext" build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi fi fi fi # Done checking deplibs! deplibs=$newdeplibs fi # Time to change all our "foo.ltframework" stuff back to "-framework foo" case $host in *-*-darwin*) newdeplibs=`$ECHO " $newdeplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` new_inherited_linker_flags=`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` deplibs=`$ECHO " $deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` ;; esac # move library search paths that coincide with paths to not yet # installed libraries to the beginning of the library search list new_libs= for path in $notinst_path; do case " $new_libs " in *" -L$path/$objdir "*) ;; *) case " $deplibs " in *" -L$path/$objdir "*) func_append new_libs " -L$path/$objdir" ;; esac ;; esac done for deplib in $deplibs; do case $deplib in -L*) case " $new_libs " in *" $deplib "*) ;; *) func_append new_libs " $deplib" ;; esac ;; *) func_append new_libs " $deplib" ;; esac done deplibs="$new_libs" # All the library-specific variables (install_libdir is set above). library_names= old_library= dlname= # Test again, we may have decided not to build it any more if test "$build_libtool_libs" = yes; then # Remove ${wl} instances when linking with ld. # FIXME: should test the right _cmds variable. case $archive_cmds in *\$LD\ *) wl= ;; esac if test "$hardcode_into_libs" = yes; then # Hardcode the library paths hardcode_libdirs= dep_rpath= rpath="$finalize_rpath" test "$opt_mode" != relink && rpath="$compile_rpath$rpath" for libdir in $rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then func_replace_sysroot "$libdir" libdir=$func_replace_sysroot_result if test -z "$hardcode_libdirs"; then hardcode_libdirs="$libdir" else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append dep_rpath " $flag" fi elif test -n "$runpath_var"; then case "$perm_rpath " in *" $libdir "*) ;; *) func_append perm_rpath " $libdir" ;; esac fi done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir="$hardcode_libdirs" eval "dep_rpath=\"$hardcode_libdir_flag_spec\"" fi if test -n "$runpath_var" && test -n "$perm_rpath"; then # We should set the runpath_var. rpath= for dir in $perm_rpath; do func_append rpath "$dir:" done eval "$runpath_var='$rpath\$$runpath_var'; export $runpath_var" fi test -n "$dep_rpath" && deplibs="$dep_rpath $deplibs" fi shlibpath="$finalize_shlibpath" test "$opt_mode" != relink && shlibpath="$compile_shlibpath$shlibpath" if test -n "$shlibpath"; then eval "$shlibpath_var='$shlibpath\$$shlibpath_var'; export $shlibpath_var" fi # Get the real and link names of the library. eval shared_ext=\"$shrext_cmds\" eval library_names=\"$library_names_spec\" set dummy $library_names shift realname="$1" shift if test -n "$soname_spec"; then eval soname=\"$soname_spec\" else soname="$realname" fi if test -z "$dlname"; then dlname=$soname fi lib="$output_objdir/$realname" linknames= for link do func_append linknames " $link" done # Use standard objects if they are pic test -z "$pic_flag" && libobjs=`$ECHO "$libobjs" | $SP2NL | $SED "$lo2o" | $NL2SP` test "X$libobjs" = "X " && libobjs= delfiles= if test -n "$export_symbols" && test -n "$include_expsyms"; then $opt_dry_run || cp "$export_symbols" "$output_objdir/$libname.uexp" export_symbols="$output_objdir/$libname.uexp" func_append delfiles " $export_symbols" fi orig_export_symbols= case $host_os in cygwin* | mingw* | cegcc*) if test -n "$export_symbols" && test -z "$export_symbols_regex"; then # exporting using user supplied symfile if test "x`$SED 1q $export_symbols`" != xEXPORTS; then # and it's NOT already a .def file. Must figure out # which of the given symbols are data symbols and tag # them as such. So, trigger use of export_symbols_cmds. # export_symbols gets reassigned inside the "prepare # the list of exported symbols" if statement, so the # include_expsyms logic still works. orig_export_symbols="$export_symbols" export_symbols= always_export_symbols=yes fi fi ;; esac # Prepare the list of exported symbols if test -z "$export_symbols"; then if test "$always_export_symbols" = yes || test -n "$export_symbols_regex"; then func_verbose "generating symbol list for \`$libname.la'" export_symbols="$output_objdir/$libname.exp" $opt_dry_run || $RM $export_symbols cmds=$export_symbols_cmds save_ifs="$IFS"; IFS='~' for cmd1 in $cmds; do IFS="$save_ifs" # Take the normal branch if the nm_file_list_spec branch # doesn't work or if tool conversion is not needed. case $nm_file_list_spec~$to_tool_file_cmd in *~func_convert_file_noop | *~func_convert_file_msys_to_w32 | ~*) try_normal_branch=yes eval cmd=\"$cmd1\" func_len " $cmd" len=$func_len_result ;; *) try_normal_branch=no ;; esac if test "$try_normal_branch" = yes \ && { test "$len" -lt "$max_cmd_len" \ || test "$max_cmd_len" -le -1; } then func_show_eval "$cmd" 'exit $?' skipped_export=false elif test -n "$nm_file_list_spec"; then func_basename "$output" output_la=$func_basename_result save_libobjs=$libobjs save_output=$output output=${output_objdir}/${output_la}.nm func_to_tool_file "$output" libobjs=$nm_file_list_spec$func_to_tool_file_result func_append delfiles " $output" func_verbose "creating $NM input file list: $output" for obj in $save_libobjs; do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" done > "$output" eval cmd=\"$cmd1\" func_show_eval "$cmd" 'exit $?' output=$save_output libobjs=$save_libobjs skipped_export=false else # The command line is too long to execute in one step. func_verbose "using reloadable object file for export list..." skipped_export=: # Break out early, otherwise skipped_export may be # set to false by a later but shorter cmd. break fi done IFS="$save_ifs" if test -n "$export_symbols_regex" && test "X$skipped_export" != "X:"; then func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"' func_show_eval '$MV "${export_symbols}T" "$export_symbols"' fi fi fi if test -n "$export_symbols" && test -n "$include_expsyms"; then tmp_export_symbols="$export_symbols" test -n "$orig_export_symbols" && tmp_export_symbols="$orig_export_symbols" $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"' fi if test "X$skipped_export" != "X:" && test -n "$orig_export_symbols"; then # The given exports_symbols file has to be filtered, so filter it. func_verbose "filter symbol list for \`$libname.la' to tag DATA exports" # FIXME: $output_objdir/$libname.filter potentially contains lots of # 's' commands which not all seds can handle. GNU sed should be fine # though. Also, the filter scales superlinearly with the number of # global variables. join(1) would be nice here, but unfortunately # isn't a blessed tool. $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter func_append delfiles " $export_symbols $output_objdir/$libname.filter" export_symbols=$output_objdir/$libname.def $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols fi tmp_deplibs= for test_deplib in $deplibs; do case " $convenience " in *" $test_deplib "*) ;; *) func_append tmp_deplibs " $test_deplib" ;; esac done deplibs="$tmp_deplibs" if test -n "$convenience"; then if test -n "$whole_archive_flag_spec" && test "$compiler_needs_object" = yes && test -z "$libobjs"; then # extract the archives, so we have objects to list. # TODO: could optimize this to just extract one archive. whole_archive_flag_spec= fi if test -n "$whole_archive_flag_spec"; then save_libobjs=$libobjs eval libobjs=\"\$libobjs $whole_archive_flag_spec\" test "X$libobjs" = "X " && libobjs= else gentop="$output_objdir/${outputname}x" func_append generated " $gentop" func_extract_archives $gentop $convenience func_append libobjs " $func_extract_archives_result" test "X$libobjs" = "X " && libobjs= fi fi if test "$thread_safe" = yes && test -n "$thread_safe_flag_spec"; then eval flag=\"$thread_safe_flag_spec\" func_append linker_flags " $flag" fi # Make a backup of the uninstalled library when relinking if test "$opt_mode" = relink; then $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}U && $MV $realname ${realname}U)' || exit $? fi # Do each of the archive commands. if test "$module" = yes && test -n "$module_cmds" ; then if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then eval test_cmds=\"$module_expsym_cmds\" cmds=$module_expsym_cmds else eval test_cmds=\"$module_cmds\" cmds=$module_cmds fi else if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then eval test_cmds=\"$archive_expsym_cmds\" cmds=$archive_expsym_cmds else eval test_cmds=\"$archive_cmds\" cmds=$archive_cmds fi fi if test "X$skipped_export" != "X:" && func_len " $test_cmds" && len=$func_len_result && test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then : else # The command line is too long to link in one step, link piecewise # or, if using GNU ld and skipped_export is not :, use a linker # script. # Save the value of $output and $libobjs because we want to # use them later. If we have whole_archive_flag_spec, we # want to use save_libobjs as it was before # whole_archive_flag_spec was expanded, because we can't # assume the linker understands whole_archive_flag_spec. # This may have to be revisited, in case too many # convenience libraries get linked in and end up exceeding # the spec. if test -z "$convenience" || test -z "$whole_archive_flag_spec"; then save_libobjs=$libobjs fi save_output=$output func_basename "$output" output_la=$func_basename_result # Clear the reloadable object creation command queue and # initialize k to one. test_cmds= concat_cmds= objlist= last_robj= k=1 if test -n "$save_libobjs" && test "X$skipped_export" != "X:" && test "$with_gnu_ld" = yes; then output=${output_objdir}/${output_la}.lnkscript func_verbose "creating GNU ld script: $output" echo 'INPUT (' > $output for obj in $save_libobjs do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" >> $output done echo ')' >> $output func_append delfiles " $output" func_to_tool_file "$output" output=$func_to_tool_file_result elif test -n "$save_libobjs" && test "X$skipped_export" != "X:" && test "X$file_list_spec" != X; then output=${output_objdir}/${output_la}.lnk func_verbose "creating linker input file list: $output" : > $output set x $save_libobjs shift firstobj= if test "$compiler_needs_object" = yes; then firstobj="$1 " shift fi for obj do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" >> $output done func_append delfiles " $output" func_to_tool_file "$output" output=$firstobj\"$file_list_spec$func_to_tool_file_result\" else if test -n "$save_libobjs"; then func_verbose "creating reloadable object files..." output=$output_objdir/$output_la-${k}.$objext eval test_cmds=\"$reload_cmds\" func_len " $test_cmds" len0=$func_len_result len=$len0 # Loop over the list of objects to be linked. for obj in $save_libobjs do func_len " $obj" func_arith $len + $func_len_result len=$func_arith_result if test "X$objlist" = X || test "$len" -lt "$max_cmd_len"; then func_append objlist " $obj" else # The command $test_cmds is almost too long, add a # command to the queue. if test "$k" -eq 1 ; then # The first file doesn't have a previous command to add. reload_objs=$objlist eval concat_cmds=\"$reload_cmds\" else # All subsequent reloadable object files will link in # the last one created. reload_objs="$objlist $last_robj" eval concat_cmds=\"\$concat_cmds~$reload_cmds~\$RM $last_robj\" fi last_robj=$output_objdir/$output_la-${k}.$objext func_arith $k + 1 k=$func_arith_result output=$output_objdir/$output_la-${k}.$objext objlist=" $obj" func_len " $last_robj" func_arith $len0 + $func_len_result len=$func_arith_result fi done # Handle the remaining objects by creating one last # reloadable object file. All subsequent reloadable object # files will link in the last one created. test -z "$concat_cmds" || concat_cmds=$concat_cmds~ reload_objs="$objlist $last_robj" eval concat_cmds=\"\${concat_cmds}$reload_cmds\" if test -n "$last_robj"; then eval concat_cmds=\"\${concat_cmds}~\$RM $last_robj\" fi func_append delfiles " $output" else output= fi if ${skipped_export-false}; then func_verbose "generating symbol list for \`$libname.la'" export_symbols="$output_objdir/$libname.exp" $opt_dry_run || $RM $export_symbols libobjs=$output # Append the command to create the export file. test -z "$concat_cmds" || concat_cmds=$concat_cmds~ eval concat_cmds=\"\$concat_cmds$export_symbols_cmds\" if test -n "$last_robj"; then eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\" fi fi test -n "$save_libobjs" && func_verbose "creating a temporary reloadable object file: $output" # Loop through the commands generated above and execute them. save_ifs="$IFS"; IFS='~' for cmd in $concat_cmds; do IFS="$save_ifs" $opt_silent || { func_quote_for_expand "$cmd" eval "func_echo $func_quote_for_expand_result" } $opt_dry_run || eval "$cmd" || { lt_exit=$? # Restore the uninstalled library and exit if test "$opt_mode" = relink; then ( cd "$output_objdir" && \ $RM "${realname}T" && \ $MV "${realname}U" "$realname" ) fi exit $lt_exit } done IFS="$save_ifs" if test -n "$export_symbols_regex" && ${skipped_export-false}; then func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"' func_show_eval '$MV "${export_symbols}T" "$export_symbols"' fi fi if ${skipped_export-false}; then if test -n "$export_symbols" && test -n "$include_expsyms"; then tmp_export_symbols="$export_symbols" test -n "$orig_export_symbols" && tmp_export_symbols="$orig_export_symbols" $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"' fi if test -n "$orig_export_symbols"; then # The given exports_symbols file has to be filtered, so filter it. func_verbose "filter symbol list for \`$libname.la' to tag DATA exports" # FIXME: $output_objdir/$libname.filter potentially contains lots of # 's' commands which not all seds can handle. GNU sed should be fine # though. Also, the filter scales superlinearly with the number of # global variables. join(1) would be nice here, but unfortunately # isn't a blessed tool. $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter func_append delfiles " $export_symbols $output_objdir/$libname.filter" export_symbols=$output_objdir/$libname.def $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols fi fi libobjs=$output # Restore the value of output. output=$save_output if test -n "$convenience" && test -n "$whole_archive_flag_spec"; then eval libobjs=\"\$libobjs $whole_archive_flag_spec\" test "X$libobjs" = "X " && libobjs= fi # Expand the library linking commands again to reset the # value of $libobjs for piecewise linking. # Do each of the archive commands. if test "$module" = yes && test -n "$module_cmds" ; then if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then cmds=$module_expsym_cmds else cmds=$module_cmds fi else if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then cmds=$archive_expsym_cmds else cmds=$archive_cmds fi fi fi if test -n "$delfiles"; then # Append the command to remove temporary files to $cmds. eval cmds=\"\$cmds~\$RM $delfiles\" fi # Add any objects from preloaded convenience libraries if test -n "$dlprefiles"; then gentop="$output_objdir/${outputname}x" func_append generated " $gentop" func_extract_archives $gentop $dlprefiles func_append libobjs " $func_extract_archives_result" test "X$libobjs" = "X " && libobjs= fi save_ifs="$IFS"; IFS='~' for cmd in $cmds; do IFS="$save_ifs" eval cmd=\"$cmd\" $opt_silent || { func_quote_for_expand "$cmd" eval "func_echo $func_quote_for_expand_result" } $opt_dry_run || eval "$cmd" || { lt_exit=$? # Restore the uninstalled library and exit if test "$opt_mode" = relink; then ( cd "$output_objdir" && \ $RM "${realname}T" && \ $MV "${realname}U" "$realname" ) fi exit $lt_exit } done IFS="$save_ifs" # Restore the uninstalled library and exit if test "$opt_mode" = relink; then $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}T && $MV $realname ${realname}T && $MV ${realname}U $realname)' || exit $? if test -n "$convenience"; then if test -z "$whole_archive_flag_spec"; then func_show_eval '${RM}r "$gentop"' fi fi exit $EXIT_SUCCESS fi # Create links to the real library. for linkname in $linknames; do if test "$realname" != "$linkname"; then func_show_eval '(cd "$output_objdir" && $RM "$linkname" && $LN_S "$realname" "$linkname")' 'exit $?' fi done # If -module or -export-dynamic was specified, set the dlname. if test "$module" = yes || test "$export_dynamic" = yes; then # On all known operating systems, these are identical. dlname="$soname" fi fi ;; obj) if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then func_warning "\`-dlopen' is ignored for objects" fi case " $deplibs" in *\ -l* | *\ -L*) func_warning "\`-l' and \`-L' are ignored for objects" ;; esac test -n "$rpath" && \ func_warning "\`-rpath' is ignored for objects" test -n "$xrpath" && \ func_warning "\`-R' is ignored for objects" test -n "$vinfo" && \ func_warning "\`-version-info' is ignored for objects" test -n "$release" && \ func_warning "\`-release' is ignored for objects" case $output in *.lo) test -n "$objs$old_deplibs" && \ func_fatal_error "cannot build library object \`$output' from non-libtool objects" libobj=$output func_lo2o "$libobj" obj=$func_lo2o_result ;; *) libobj= obj="$output" ;; esac # Delete the old objects. $opt_dry_run || $RM $obj $libobj # Objects from convenience libraries. This assumes # single-version convenience libraries. Whenever we create # different ones for PIC/non-PIC, this we'll have to duplicate # the extraction. reload_conv_objs= gentop= # reload_cmds runs $LD directly, so let us get rid of # -Wl from whole_archive_flag_spec and hope we can get by with # turning comma into space.. wl= if test -n "$convenience"; then if test -n "$whole_archive_flag_spec"; then eval tmp_whole_archive_flags=\"$whole_archive_flag_spec\" reload_conv_objs=$reload_objs\ `$ECHO "$tmp_whole_archive_flags" | $SED 's|,| |g'` else gentop="$output_objdir/${obj}x" func_append generated " $gentop" func_extract_archives $gentop $convenience reload_conv_objs="$reload_objs $func_extract_archives_result" fi fi # If we're not building shared, we need to use non_pic_objs test "$build_libtool_libs" != yes && libobjs="$non_pic_objects" # Create the old-style object. reload_objs="$objs$old_deplibs "`$ECHO "$libobjs" | $SP2NL | $SED "/\.${libext}$/d; /\.lib$/d; $lo2o" | $NL2SP`" $reload_conv_objs" ### testsuite: skip nested quoting test output="$obj" func_execute_cmds "$reload_cmds" 'exit $?' # Exit if we aren't doing a library object file. if test -z "$libobj"; then if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi exit $EXIT_SUCCESS fi if test "$build_libtool_libs" != yes; then if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi # Create an invalid libtool object if no PIC, so that we don't # accidentally link it into a program. # $show "echo timestamp > $libobj" # $opt_dry_run || eval "echo timestamp > $libobj" || exit $? exit $EXIT_SUCCESS fi if test -n "$pic_flag" || test "$pic_mode" != default; then # Only do commands if we really have different PIC objects. reload_objs="$libobjs $reload_conv_objs" output="$libobj" func_execute_cmds "$reload_cmds" 'exit $?' fi if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi exit $EXIT_SUCCESS ;; prog) case $host in *cygwin*) func_stripname '' '.exe' "$output" output=$func_stripname_result.exe;; esac test -n "$vinfo" && \ func_warning "\`-version-info' is ignored for programs" test -n "$release" && \ func_warning "\`-release' is ignored for programs" test "$preload" = yes \ && test "$dlopen_support" = unknown \ && test "$dlopen_self" = unknown \ && test "$dlopen_self_static" = unknown && \ func_warning "\`LT_INIT([dlopen])' not used. Assuming no dlopen support." case $host in *-*-rhapsody* | *-*-darwin1.[012]) # On Rhapsody replace the C library is the System framework compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's/ -lc / System.ltframework /'` finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's/ -lc / System.ltframework /'` ;; esac case $host in *-*-darwin*) # Don't allow lazy linking, it breaks C++ global constructors # But is supposedly fixed on 10.4 or later (yay!). if test "$tagname" = CXX ; then case ${MACOSX_DEPLOYMENT_TARGET-10.0} in 10.[0123]) func_append compile_command " ${wl}-bind_at_load" func_append finalize_command " ${wl}-bind_at_load" ;; esac fi # Time to change all our "foo.ltframework" stuff back to "-framework foo" compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` ;; esac # move library search paths that coincide with paths to not yet # installed libraries to the beginning of the library search list new_libs= for path in $notinst_path; do case " $new_libs " in *" -L$path/$objdir "*) ;; *) case " $compile_deplibs " in *" -L$path/$objdir "*) func_append new_libs " -L$path/$objdir" ;; esac ;; esac done for deplib in $compile_deplibs; do case $deplib in -L*) case " $new_libs " in *" $deplib "*) ;; *) func_append new_libs " $deplib" ;; esac ;; *) func_append new_libs " $deplib" ;; esac done compile_deplibs="$new_libs" func_append compile_command " $compile_deplibs" func_append finalize_command " $finalize_deplibs" if test -n "$rpath$xrpath"; then # If the user specified any rpath flags, then add them. for libdir in $rpath $xrpath; do # This is the magic to use -rpath. case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac done fi # Now hardcode the library paths rpath= hardcode_libdirs= for libdir in $compile_rpath $finalize_rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then if test -z "$hardcode_libdirs"; then hardcode_libdirs="$libdir" else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append rpath " $flag" fi elif test -n "$runpath_var"; then case "$perm_rpath " in *" $libdir "*) ;; *) func_append perm_rpath " $libdir" ;; esac fi case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) testbindir=`${ECHO} "$libdir" | ${SED} -e 's*/lib$*/bin*'` case :$dllsearchpath: in *":$libdir:"*) ;; ::) dllsearchpath=$libdir;; *) func_append dllsearchpath ":$libdir";; esac case :$dllsearchpath: in *":$testbindir:"*) ;; ::) dllsearchpath=$testbindir;; *) func_append dllsearchpath ":$testbindir";; esac ;; esac done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir="$hardcode_libdirs" eval rpath=\" $hardcode_libdir_flag_spec\" fi compile_rpath="$rpath" rpath= hardcode_libdirs= for libdir in $finalize_rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then if test -z "$hardcode_libdirs"; then hardcode_libdirs="$libdir" else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append rpath " $flag" fi elif test -n "$runpath_var"; then case "$finalize_perm_rpath " in *" $libdir "*) ;; *) func_append finalize_perm_rpath " $libdir" ;; esac fi done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir="$hardcode_libdirs" eval rpath=\" $hardcode_libdir_flag_spec\" fi finalize_rpath="$rpath" if test -n "$libobjs" && test "$build_old_libs" = yes; then # Transform all the library objects into standard objects. compile_command=`$ECHO "$compile_command" | $SP2NL | $SED "$lo2o" | $NL2SP` finalize_command=`$ECHO "$finalize_command" | $SP2NL | $SED "$lo2o" | $NL2SP` fi func_generate_dlsyms "$outputname" "@PROGRAM@" "no" # template prelinking step if test -n "$prelink_cmds"; then func_execute_cmds "$prelink_cmds" 'exit $?' fi wrappers_required=yes case $host in *cegcc* | *mingw32ce*) # Disable wrappers for cegcc and mingw32ce hosts, we are cross compiling anyway. wrappers_required=no ;; *cygwin* | *mingw* ) if test "$build_libtool_libs" != yes; then wrappers_required=no fi ;; *) if test "$need_relink" = no || test "$build_libtool_libs" != yes; then wrappers_required=no fi ;; esac if test "$wrappers_required" = no; then # Replace the output file specification. compile_command=`$ECHO "$compile_command" | $SED 's%@OUTPUT@%'"$output"'%g'` link_command="$compile_command$compile_rpath" # We have no uninstalled library dependencies, so finalize right now. exit_status=0 func_show_eval "$link_command" 'exit_status=$?' if test -n "$postlink_cmds"; then func_to_tool_file "$output" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi # Delete the generated files. if test -f "$output_objdir/${outputname}S.${objext}"; then func_show_eval '$RM "$output_objdir/${outputname}S.${objext}"' fi exit $exit_status fi if test -n "$compile_shlibpath$finalize_shlibpath"; then compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command" fi if test -n "$finalize_shlibpath"; then finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command" fi compile_var= finalize_var= if test -n "$runpath_var"; then if test -n "$perm_rpath"; then # We should set the runpath_var. rpath= for dir in $perm_rpath; do func_append rpath "$dir:" done compile_var="$runpath_var=\"$rpath\$$runpath_var\" " fi if test -n "$finalize_perm_rpath"; then # We should set the runpath_var. rpath= for dir in $finalize_perm_rpath; do func_append rpath "$dir:" done finalize_var="$runpath_var=\"$rpath\$$runpath_var\" " fi fi if test "$no_install" = yes; then # We don't need to create a wrapper script. link_command="$compile_var$compile_command$compile_rpath" # Replace the output file specification. link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output"'%g'` # Delete the old output file. $opt_dry_run || $RM $output # Link the executable and exit func_show_eval "$link_command" 'exit $?' if test -n "$postlink_cmds"; then func_to_tool_file "$output" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi exit $EXIT_SUCCESS fi if test "$hardcode_action" = relink; then # Fast installation is not supported link_command="$compile_var$compile_command$compile_rpath" relink_command="$finalize_var$finalize_command$finalize_rpath" func_warning "this platform does not like uninstalled shared libraries" func_warning "\`$output' will be relinked during installation" else if test "$fast_install" != no; then link_command="$finalize_var$compile_command$finalize_rpath" if test "$fast_install" = yes; then relink_command=`$ECHO "$compile_var$compile_command$compile_rpath" | $SED 's%@OUTPUT@%\$progdir/\$file%g'` else # fast_install is set to needless relink_command= fi else link_command="$compile_var$compile_command$compile_rpath" relink_command="$finalize_var$finalize_command$finalize_rpath" fi fi # Replace the output file specification. link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'` # Delete the old output files. $opt_dry_run || $RM $output $output_objdir/$outputname $output_objdir/lt-$outputname func_show_eval "$link_command" 'exit $?' if test -n "$postlink_cmds"; then func_to_tool_file "$output_objdir/$outputname" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output_objdir/$outputname"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi # Now create the wrapper script. func_verbose "creating $output" # Quote the relink command for shipping. if test -n "$relink_command"; then # Preserve any variables that may affect compiler behavior for var in $variables_saved_for_relink; do if eval test -z \"\${$var+set}\"; then relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command" elif eval var_value=\$$var; test -z "$var_value"; then relink_command="$var=; export $var; $relink_command" else func_quote_for_eval "$var_value" relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command" fi done relink_command="(cd `pwd`; $relink_command)" relink_command=`$ECHO "$relink_command" | $SED "$sed_quote_subst"` fi # Only actually do things if not in dry run mode. $opt_dry_run || { # win32 will think the script is a binary if it has # a .exe suffix, so we strip it off here. case $output in *.exe) func_stripname '' '.exe' "$output" output=$func_stripname_result ;; esac # test for cygwin because mv fails w/o .exe extensions case $host in *cygwin*) exeext=.exe func_stripname '' '.exe' "$outputname" outputname=$func_stripname_result ;; *) exeext= ;; esac case $host in *cygwin* | *mingw* ) func_dirname_and_basename "$output" "" "." output_name=$func_basename_result output_path=$func_dirname_result cwrappersource="$output_path/$objdir/lt-$output_name.c" cwrapper="$output_path/$output_name.exe" $RM $cwrappersource $cwrapper trap "$RM $cwrappersource $cwrapper; exit $EXIT_FAILURE" 1 2 15 func_emit_cwrapperexe_src > $cwrappersource # The wrapper executable is built using the $host compiler, # because it contains $host paths and files. 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" >&6; } LN_S=$as_ln_s if test "$LN_S" = "ln -s"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 $as_echo "yes" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5 $as_echo "no, using $LN_S" >&6; } fi # find the maximum length of command line arguments { $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5 $as_echo_n "checking the maximum length of command line arguments... " >&6; } if ${lt_cv_sys_max_cmd_len+:} false; then : $as_echo_n "(cached) " >&6 else i=0 teststring="ABCD" case $build_os in msdosdjgpp*) # On DJGPP, this test can blow up pretty badly due to problems in libc # (any single argument exceeding 2000 bytes causes a buffer overrun # during glob expansion). Even if it were fixed, the result of this # check would be larger than it should be. lt_cv_sys_max_cmd_len=12288; # 12K is about right ;; gnu*) # Under GNU Hurd, this test is not required because there is # no limit to the length of command line arguments. # Libtool will interpret -1 as no limit whatsoever lt_cv_sys_max_cmd_len=-1; ;; cygwin* | mingw* | cegcc*) # On Win9x/ME, this test blows up -- it succeeds, but takes # about 5 minutes as the teststring grows exponentially. # Worse, since 9x/ME are not pre-emptively multitasking, # you end up with a "frozen" computer, even though with patience # the test eventually succeeds (with a max line length of 256k). # Instead, let's just punt: use the minimum linelength reported by # all of the supported platforms: 8192 (on NT/2K/XP). lt_cv_sys_max_cmd_len=8192; ;; mint*) # On MiNT this can take a long time and run out of memory. lt_cv_sys_max_cmd_len=8192; ;; amigaos*) # On AmigaOS with pdksh, this test takes hours, literally. # So we just punt and use a minimum line length of 8192. lt_cv_sys_max_cmd_len=8192; ;; netbsd* | freebsd* | openbsd* | darwin* | dragonfly*) # This has been around since 386BSD, at least. Likely further. if test -x /sbin/sysctl; then lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax` elif test -x /usr/sbin/sysctl; then lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax` else lt_cv_sys_max_cmd_len=65536 # usable default for all BSDs fi # And add a safety zone lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` ;; interix*) # We know the value 262144 and hardcode it with a safety zone (like BSD) lt_cv_sys_max_cmd_len=196608 ;; os2*) # The test takes a long time on OS/2. lt_cv_sys_max_cmd_len=8192 ;; osf*) # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not # nice to cause kernel panics so lets avoid the loop below. # First set a reasonable default. lt_cv_sys_max_cmd_len=16384 # if test -x /sbin/sysconfig; then case `/sbin/sysconfig -q proc exec_disable_arg_limit` in *1*) lt_cv_sys_max_cmd_len=-1 ;; esac fi ;; sco3.2v5*) lt_cv_sys_max_cmd_len=102400 ;; sysv5* | sco5v6* | sysv4.2uw2*) kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null` if test -n "$kargmax"; then lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[ ]//'` else lt_cv_sys_max_cmd_len=32768 fi ;; *) lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null` if test -n "$lt_cv_sys_max_cmd_len"; then lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` else # Make teststring a little bigger before we do anything with it. # a 1K string should be a reasonable start. for i in 1 2 3 4 5 6 7 8 ; do teststring=$teststring$teststring done SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} # If test is not a shell built-in, we'll probably end up computing a # maximum length that is only half of the actual maximum length, but # we can't tell. while { test "X"`env echo "$teststring$teststring" 2>/dev/null` \ = "X$teststring$teststring"; } >/dev/null 2>&1 && test $i != 17 # 1/2 MB should be enough do i=`expr $i + 1` teststring=$teststring$teststring done # Only check the string length outside the loop. lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` teststring= # Add a significant safety factor because C++ compilers can tack on # massive amounts of additional arguments before passing them to the # linker. It appears as though 1/2 is a usable value. lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` fi ;; esac fi if test -n $lt_cv_sys_max_cmd_len ; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5 $as_echo "$lt_cv_sys_max_cmd_len" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5 $as_echo "none" >&6; } fi max_cmd_len=$lt_cv_sys_max_cmd_len : ${CP="cp -f"} : ${MV="mv -f"} : ${RM="rm -f"} { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the shell understands some XSI constructs" >&5 $as_echo_n "checking whether the shell understands some XSI constructs... 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" >&6; } if ${lt_cv_to_host_file_cmd+:} false; then : $as_echo_n "(cached) " >&6 else case $host in *-*-mingw* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32 ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32 ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32 ;; esac ;; *-*-cygwin* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_noop ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin ;; esac ;; * ) # unhandled hosts (and "normal" native builds) lt_cv_to_host_file_cmd=func_convert_file_noop ;; esac fi to_host_file_cmd=$lt_cv_to_host_file_cmd { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5 $as_echo "$lt_cv_to_host_file_cmd" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5 $as_echo_n "checking how to convert $build file names to toolchain format... 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" >&6; } if ${lt_cv_ld_reload_flag+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ld_reload_flag='-r' fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5 $as_echo "$lt_cv_ld_reload_flag" >&6; } reload_flag=$lt_cv_ld_reload_flag case $reload_flag in "" | " "*) ;; *) reload_flag=" $reload_flag" ;; esac reload_cmds='$LD$reload_flag -o $output$reload_objs' case $host_os in cygwin* | mingw* | pw32* | cegcc*) if test "$GCC" != yes; then reload_cmds=false fi ;; darwin*) if test "$GCC" = yes; then reload_cmds='$LTCC $LTCFLAGS -nostdlib ${wl}-r -o $output$reload_objs' else reload_cmds='$LD$reload_flag -o $output$reload_objs' fi ;; esac if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args. set dummy ${ac_tool_prefix}objdump; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OBJDUMP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OBJDUMP"; then ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OBJDUMP=$ac_cv_prog_OBJDUMP if test -n "$OBJDUMP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5 $as_echo "$OBJDUMP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OBJDUMP"; then ac_ct_OBJDUMP=$OBJDUMP # Extract the first word of "objdump", so it can be a program name with args. set dummy objdump; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OBJDUMP"; then ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OBJDUMP="objdump" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP if test -n "$ac_ct_OBJDUMP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5 $as_echo "$ac_ct_OBJDUMP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OBJDUMP" = x; then OBJDUMP="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OBJDUMP=$ac_ct_OBJDUMP fi else OBJDUMP="$ac_cv_prog_OBJDUMP" fi test -z "$OBJDUMP" && OBJDUMP=objdump { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5 $as_echo_n "checking how to recognize dependent libraries... " >&6; } if ${lt_cv_deplibs_check_method+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_file_magic_cmd='$MAGIC_CMD' lt_cv_file_magic_test_file= lt_cv_deplibs_check_method='unknown' # Need to set the preceding variable on all platforms that support # interlibrary dependencies. # 'none' -- dependencies not supported. # `unknown' -- same as none, but documents that we really don't know. # 'pass_all' -- all dependencies passed with no checks. # 'test_compile' -- check by making test program. # 'file_magic [[regex]]' -- check by looking for files in library path # which responds to the $file_magic_cmd with a given extended regex. # If you have `file' or equivalent on your system and you're not sure # whether `pass_all' will *always* work, you probably want this one. case $host_os in aix[4-9]*) lt_cv_deplibs_check_method=pass_all ;; beos*) lt_cv_deplibs_check_method=pass_all ;; bsdi[45]*) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)' lt_cv_file_magic_cmd='/usr/bin/file -L' lt_cv_file_magic_test_file=/shlib/libc.so ;; cygwin*) # func_win32_libid is a shell function defined in ltmain.sh lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' lt_cv_file_magic_cmd='func_win32_libid' ;; mingw* | pw32*) # Base MSYS/MinGW do not provide the 'file' command needed by # func_win32_libid shell function, so use a weaker test based on 'objdump', # unless we find 'file', for example because we are cross-compiling. # func_win32_libid assumes BSD nm, so disallow it if using MS dumpbin. if ( test "$lt_cv_nm_interface" = "BSD nm" && file / ) >/dev/null 2>&1; then lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' lt_cv_file_magic_cmd='func_win32_libid' else # Keep this pattern in sync with the one in func_win32_libid. lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' lt_cv_file_magic_cmd='$OBJDUMP -f' fi ;; cegcc*) # use the weaker test based on 'objdump'. See mingw*. lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?' lt_cv_file_magic_cmd='$OBJDUMP -f' ;; darwin* | rhapsody*) lt_cv_deplibs_check_method=pass_all ;; freebsd* | dragonfly*) if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then case $host_cpu in i*86 ) # Not sure whether the presence of OpenBSD here was a mistake. # Let's accept both of them until this is cleared up. lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[3-9]86 (compact )?demand paged shared library' lt_cv_file_magic_cmd=/usr/bin/file lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*` ;; esac else lt_cv_deplibs_check_method=pass_all fi ;; gnu*) lt_cv_deplibs_check_method=pass_all ;; haiku*) lt_cv_deplibs_check_method=pass_all ;; hpux10.20* | hpux11*) lt_cv_file_magic_cmd=/usr/bin/file case $host_cpu in ia64*) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - IA64' lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so ;; hppa*64*) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]' lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl ;; *) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9]\.[0-9]) shared library' lt_cv_file_magic_test_file=/usr/lib/libc.sl ;; esac ;; interix[3-9]*) # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|\.a)$' ;; irix5* | irix6* | nonstopux*) case $LD in *-32|*"-32 ") libmagic=32-bit;; *-n32|*"-n32 ") libmagic=N32;; *-64|*"-64 ") libmagic=64-bit;; *) libmagic=never-match;; esac lt_cv_deplibs_check_method=pass_all ;; # This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu) lt_cv_deplibs_check_method=pass_all ;; netbsd*) if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|_pic\.a)$' fi ;; newos6*) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)' lt_cv_file_magic_cmd=/usr/bin/file lt_cv_file_magic_test_file=/usr/lib/libnls.so ;; *nto* | *qnx*) lt_cv_deplibs_check_method=pass_all ;; openbsd*) if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|\.so|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' fi ;; osf3* | osf4* | osf5*) lt_cv_deplibs_check_method=pass_all ;; rdos*) lt_cv_deplibs_check_method=pass_all ;; solaris*) lt_cv_deplibs_check_method=pass_all ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) lt_cv_deplibs_check_method=pass_all ;; sysv4 | sysv4.3*) case $host_vendor in motorola) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]' lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*` ;; ncr) lt_cv_deplibs_check_method=pass_all ;; sequent) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )' ;; sni) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib" lt_cv_file_magic_test_file=/lib/libc.so ;; siemens) lt_cv_deplibs_check_method=pass_all ;; pc) lt_cv_deplibs_check_method=pass_all ;; esac ;; tpf*) lt_cv_deplibs_check_method=pass_all ;; esac fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5 $as_echo "$lt_cv_deplibs_check_method" >&6; } file_magic_glob= want_nocaseglob=no if test "$build" = "$host"; then case $host_os in mingw* | pw32*) if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then want_nocaseglob=yes else file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[\1]\/[\1]\/g;/g"` fi ;; esac fi file_magic_cmd=$lt_cv_file_magic_cmd deplibs_check_method=$lt_cv_deplibs_check_method test -z "$deplibs_check_method" && deplibs_check_method=unknown if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args. set dummy ${ac_tool_prefix}dlltool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_DLLTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$DLLTOOL"; then ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi DLLTOOL=$ac_cv_prog_DLLTOOL if test -n "$DLLTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5 $as_echo "$DLLTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_DLLTOOL"; then ac_ct_DLLTOOL=$DLLTOOL # Extract the first word of "dlltool", so it can be a program name with args. set dummy dlltool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_DLLTOOL"; then ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_DLLTOOL="dlltool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL if test -n "$ac_ct_DLLTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5 $as_echo "$ac_ct_DLLTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_DLLTOOL" = x; then DLLTOOL="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac DLLTOOL=$ac_ct_DLLTOOL fi else DLLTOOL="$ac_cv_prog_DLLTOOL" fi test -z "$DLLTOOL" && DLLTOOL=dlltool { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5 $as_echo_n "checking how to associate runtime and link libraries... " >&6; } if ${lt_cv_sharedlib_from_linklib_cmd+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_sharedlib_from_linklib_cmd='unknown' case $host_os in cygwin* | mingw* | pw32* | cegcc*) # two different shell functions defined in ltmain.sh # decide which to use based on capabilities of $DLLTOOL case `$DLLTOOL --help 2>&1` in *--identify-strict*) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib ;; *) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback ;; esac ;; *) # fallback: assume linklib IS sharedlib lt_cv_sharedlib_from_linklib_cmd="$ECHO" ;; esac fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5 $as_echo "$lt_cv_sharedlib_from_linklib_cmd" >&6; } sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO if test -n "$ac_tool_prefix"; then for ac_prog in ar do # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. set dummy $ac_tool_prefix$ac_prog; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_AR+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$AR"; then ac_cv_prog_AR="$AR" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_AR="$ac_tool_prefix$ac_prog" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi AR=$ac_cv_prog_AR if test -n "$AR"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5 $as_echo "$AR" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi test -n "$AR" && break done fi if test -z "$AR"; then ac_ct_AR=$AR for ac_prog in ar do # Extract the first word of "$ac_prog", so it can be a program name with args. set dummy $ac_prog; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_AR+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_AR"; then ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_AR="$ac_prog" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_AR=$ac_cv_prog_ac_ct_AR if test -n "$ac_ct_AR"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5 $as_echo "$ac_ct_AR" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi test -n "$ac_ct_AR" && break done if test "x$ac_ct_AR" = x; then AR="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac AR=$ac_ct_AR fi fi : ${AR=ar} : ${AR_FLAGS=cru} { $as_echo "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5 $as_echo_n "checking for archiver @FILE support... " >&6; } if ${lt_cv_ar_at_file+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ar_at_file=no cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : echo conftest.$ac_objext > conftest.lst lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&5' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 (eval $lt_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test "$ac_status" -eq 0; then # Ensure the archiver fails upon bogus file names. rm -f conftest.$ac_objext libconftest.a { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 (eval $lt_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test "$ac_status" -ne 0; then lt_cv_ar_at_file=@ fi fi rm -f conftest.* libconftest.a fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5 $as_echo "$lt_cv_ar_at_file" >&6; } if test "x$lt_cv_ar_at_file" = xno; then archiver_list_spec= else archiver_list_spec=$lt_cv_ar_at_file fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. set dummy ${ac_tool_prefix}strip; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_STRIP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$STRIP"; then ac_cv_prog_STRIP="$STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_STRIP="${ac_tool_prefix}strip" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi STRIP=$ac_cv_prog_STRIP if test -n "$STRIP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5 $as_echo "$STRIP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_STRIP"; then ac_ct_STRIP=$STRIP # Extract the first word of "strip", so it can be a program name with args. set dummy strip; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_STRIP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_STRIP"; then ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_STRIP="strip" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP if test -n "$ac_ct_STRIP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5 $as_echo "$ac_ct_STRIP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_STRIP" = x; then STRIP=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac STRIP=$ac_ct_STRIP fi else STRIP="$ac_cv_prog_STRIP" fi test -z "$STRIP" && STRIP=: if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args. set dummy ${ac_tool_prefix}ranlib; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_RANLIB+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$RANLIB"; then ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi RANLIB=$ac_cv_prog_RANLIB if test -n "$RANLIB"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5 $as_echo "$RANLIB" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_RANLIB"; then ac_ct_RANLIB=$RANLIB # Extract the first word of "ranlib", so it can be a program name with args. set dummy ranlib; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_RANLIB+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_RANLIB"; then ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_RANLIB="ranlib" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB if test -n "$ac_ct_RANLIB"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5 $as_echo "$ac_ct_RANLIB" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_RANLIB" = x; then RANLIB=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac RANLIB=$ac_ct_RANLIB fi else RANLIB="$ac_cv_prog_RANLIB" fi test -z "$RANLIB" && RANLIB=: # Determine commands to create old-style static archives. old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs' old_postinstall_cmds='chmod 644 $oldlib' old_postuninstall_cmds= if test -n "$RANLIB"; then case $host_os in openbsd*) old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib" ;; *) old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib" ;; esac old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib" fi case $host_os in darwin*) lock_old_archive_extraction=yes ;; *) lock_old_archive_extraction=no ;; esac # If no C compiler was specified, use CC. LTCC=${LTCC-"$CC"} # If no C compiler flags were specified, use CFLAGS. LTCFLAGS=${LTCFLAGS-"$CFLAGS"} # Allow CC to be a program name with arguments. compiler=$CC # Check for command to grab the raw symbol name followed by C symbol from nm. { $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5 $as_echo_n "checking command to parse $NM output from $compiler object... " >&6; } if ${lt_cv_sys_global_symbol_pipe+:} false; then : $as_echo_n "(cached) " >&6 else # These are sane defaults that work on at least a few old systems. # [They come from Ultrix. What could be older than Ultrix?!! ;)] # Character class describing NM global symbol codes. symcode='[BCDEGRST]' # Regexp to match symbols that can be accessed directly from C. sympat='\([_A-Za-z][_A-Za-z0-9]*\)' # Define system-specific variables. case $host_os in aix*) symcode='[BCDT]' ;; cygwin* | mingw* | pw32* | cegcc*) symcode='[ABCDGISTW]' ;; hpux*) if test "$host_cpu" = ia64; then symcode='[ABCDEGRST]' fi ;; irix* | nonstopux*) symcode='[BCDEGRST]' ;; osf*) symcode='[BCDEGQRST]' ;; solaris*) symcode='[BDRT]' ;; sco3.2v5*) symcode='[DT]' ;; sysv4.2uw2*) symcode='[DT]' ;; sysv5* | sco5v6* | unixware* | OpenUNIX*) symcode='[ABDT]' ;; sysv4) symcode='[DFNSTU]' ;; esac # If we're using GNU nm, then use its standard symbol codes. case `$NM -V 2>&1` in *GNU* | *'with BFD'*) symcode='[ABCDGIRSTW]' ;; esac # Transform an extracted symbol line into a proper C declaration. # Some systems (esp. on ia64) link data and code symbols differently, # so use this general approach. lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'" # Transform an extracted symbol line into symbol name and symbol address lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([^ ]*\)[ ]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([^ ]*\) \([^ ]*\)$/ {\"\2\", (void *) \&\2},/p'" lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \([^ ]*\)[ ]*$/ {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([^ ]*\) \(lib[^ ]*\)$/ {\"\2\", (void *) \&\2},/p' -e 's/^$symcode* \([^ ]*\) \([^ ]*\)$/ {\"lib\2\", (void *) \&\2},/p'" # Handle CRLF in mingw tool chain opt_cr= case $build_os in mingw*) opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp ;; esac # Try without a prefix underscore, then with it. for ac_symprfx in "" "_"; do # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. symxfrm="\\1 $ac_symprfx\\2 \\2" # Write the raw and C identifiers. if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Fake it for dumpbin and say T for any non-static function # and D for any global variable. # Also find C++ and __fastcall symbols from MSVC++, # which start with @ or ?. lt_cv_sys_global_symbol_pipe="$AWK '"\ " {last_section=section; section=\$ 3};"\ " /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ " /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ " \$ 0!~/External *\|/{next};"\ " / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ " {if(hide[section]) next};"\ " {f=0}; \$ 0~/\(\).*\|/{f=1}; {printf f ? \"T \" : \"D \"};"\ " {split(\$ 0, a, /\||\r/); split(a[2], s)};"\ " s[1]~/^[@?]/{print s[1], s[1]; next};"\ " s[1]~prfx {split(s[1],t,\"@\"); print t[1], substr(t[1],length(prfx))}"\ " ' prfx=^$ac_symprfx" else lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($symcode$symcode*\)[ ][ ]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" fi lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" # Check to see that the pipe works correctly. pipe_works=no rm -f conftest* cat > conftest.$ac_ext <<_LT_EOF #ifdef __cplusplus extern "C" { #endif char nm_test_var; void nm_test_func(void); void nm_test_func(void){} #ifdef __cplusplus } #endif int main(){nm_test_var='a';nm_test_func();return(0);} _LT_EOF if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then # Now try to grab the symbols. nlist=conftest.nm if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist\""; } >&5 (eval $NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } && test -s "$nlist"; then # Try sorting and uniquifying the output. if sort "$nlist" | uniq > "$nlist"T; then mv -f "$nlist"T "$nlist" else rm -f "$nlist"T fi # Make sure that we snagged all the symbols we need. if $GREP ' nm_test_var$' "$nlist" >/dev/null; then if $GREP ' nm_test_func$' "$nlist" >/dev/null; then cat <<_LT_EOF > conftest.$ac_ext /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) /* DATA imports from DLLs on WIN32 con't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT_DLSYM_CONST #elif defined(__osf__) /* This system does not cope well with relocations in const data. */ # define LT_DLSYM_CONST #else # define LT_DLSYM_CONST const #endif #ifdef __cplusplus extern "C" { #endif _LT_EOF # Now generate the symbol file. eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' cat <<_LT_EOF >> conftest.$ac_ext /* The mapping between symbol names and symbols. */ LT_DLSYM_CONST struct { const char *name; void *address; } lt__PROGRAM__LTX_preloaded_symbols[] = { { "@PROGRAM@", (void *) 0 }, _LT_EOF $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/ {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext cat <<\_LT_EOF >> conftest.$ac_ext {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt__PROGRAM__LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif _LT_EOF # Now try linking the two files. mv conftest.$ac_objext conftstm.$ac_objext lt_globsym_save_LIBS=$LIBS lt_globsym_save_CFLAGS=$CFLAGS LIBS="conftstm.$ac_objext" CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag" if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 (eval $ac_link) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } && test -s conftest${ac_exeext}; then pipe_works=yes fi LIBS=$lt_globsym_save_LIBS CFLAGS=$lt_globsym_save_CFLAGS else echo "cannot find nm_test_func in $nlist" >&5 fi else echo "cannot find nm_test_var in $nlist" >&5 fi else echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5 fi else echo "$progname: failed program was:" >&5 cat conftest.$ac_ext >&5 fi rm -rf conftest* conftst* # Do not use the global_symbol_pipe unless it works. if test "$pipe_works" = yes; then break else lt_cv_sys_global_symbol_pipe= fi done fi if test -z "$lt_cv_sys_global_symbol_pipe"; then lt_cv_sys_global_symbol_to_cdecl= fi if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5 $as_echo "failed" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5 $as_echo "ok" >&6; } fi # Response file support. if test "$lt_cv_nm_interface" = "MS dumpbin"; then nm_file_list_spec='@' elif $NM --help 2>/dev/null | grep '[@]FILE' >/dev/null; then nm_file_list_spec='@' fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5 $as_echo_n "checking for sysroot... " >&6; } # Check whether --with-sysroot was given. if test "${with_sysroot+set}" = set; then : withval=$with_sysroot; else with_sysroot=no fi lt_sysroot= case ${with_sysroot} in #( yes) if test "$GCC" = yes; then lt_sysroot=`$CC --print-sysroot 2>/dev/null` fi ;; #( /*) lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"` ;; #( no|'') ;; #( *) { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${with_sysroot}" >&5 $as_echo "${with_sysroot}" >&6; } as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5 ;; esac { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5 $as_echo "${lt_sysroot:-no}" >&6; } # Check whether --enable-libtool-lock was given. if test "${enable_libtool_lock+set}" = set; then : enableval=$enable_libtool_lock; fi test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes # Some flags need to be propagated to the compiler or linker for good # libtool support. case $host in ia64-*-hpux*) # Find out which ABI we are using. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.$ac_objext` in *ELF-32*) HPUX_IA64_MODE="32" ;; *ELF-64*) HPUX_IA64_MODE="64" ;; esac fi rm -rf conftest* ;; *-*-irix6*) # Find out which ABI we are using. echo '#line '$LINENO' "configure"' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then if test "$lt_cv_prog_gnu_ld" = yes; then case `/usr/bin/file conftest.$ac_objext` in *32-bit*) LD="${LD-ld} -melf32bsmip" ;; *N32*) LD="${LD-ld} -melf32bmipn32" ;; *64-bit*) LD="${LD-ld} -melf64bmip" ;; esac else case `/usr/bin/file conftest.$ac_objext` in *32-bit*) LD="${LD-ld} -32" ;; *N32*) LD="${LD-ld} -n32" ;; *64-bit*) LD="${LD-ld} -64" ;; esac fi fi rm -rf conftest* ;; x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \ s390*-*linux*|s390*-*tpf*|sparc*-*linux*) # Find out which ABI we are using. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.o` in *32-bit*) case $host in x86_64-*kfreebsd*-gnu) LD="${LD-ld} -m elf_i386_fbsd" ;; x86_64-*linux*) LD="${LD-ld} -m elf_i386" ;; ppc64-*linux*|powerpc64-*linux*) LD="${LD-ld} -m elf32ppclinux" ;; s390x-*linux*) LD="${LD-ld} -m elf_s390" ;; sparc64-*linux*) LD="${LD-ld} -m elf32_sparc" ;; esac ;; *64-bit*) case $host in x86_64-*kfreebsd*-gnu) LD="${LD-ld} -m elf_x86_64_fbsd" ;; x86_64-*linux*) LD="${LD-ld} -m elf_x86_64" ;; ppc*-*linux*|powerpc*-*linux*) LD="${LD-ld} -m elf64ppc" ;; s390*-*linux*|s390*-*tpf*) LD="${LD-ld} -m elf64_s390" ;; sparc*-*linux*) LD="${LD-ld} -m elf64_sparc" ;; esac ;; esac fi rm -rf conftest* ;; *-*-sco3.2v5*) # On SCO OpenServer 5, we need -belf to get full-featured binaries. SAVE_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -belf" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5 $as_echo_n "checking whether the C compiler needs -belf... " >&6; } if ${lt_cv_cc_needs_belf+:} false; then : $as_echo_n "(cached) " >&6 else ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_cv_cc_needs_belf=yes else lt_cv_cc_needs_belf=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5 $as_echo "$lt_cv_cc_needs_belf" >&6; } if test x"$lt_cv_cc_needs_belf" != x"yes"; then # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf CFLAGS="$SAVE_CFLAGS" fi ;; *-*solaris*) # Find out which ABI we are using. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.o` in *64-bit*) case $lt_cv_prog_gnu_ld in yes*) case $host in i?86-*-solaris*) LD="${LD-ld} -m elf_x86_64" ;; sparc*-*-solaris*) LD="${LD-ld} -m elf64_sparc" ;; esac # GNU ld 2.21 introduced _sol2 emulations. Use them if available. if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then LD="${LD-ld}_sol2" fi ;; *) if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then LD="${LD-ld} -64" fi ;; esac ;; esac fi rm -rf conftest* ;; esac need_locks="$enable_libtool_lock" if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args. set dummy ${ac_tool_prefix}mt; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_MANIFEST_TOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$MANIFEST_TOOL"; then ac_cv_prog_MANIFEST_TOOL="$MANIFEST_TOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL if test -n "$MANIFEST_TOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5 $as_echo "$MANIFEST_TOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_MANIFEST_TOOL"; then ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL # Extract the first word of "mt", so it can be a program name with args. set dummy mt; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_MANIFEST_TOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_MANIFEST_TOOL"; then ac_cv_prog_ac_ct_MANIFEST_TOOL="$ac_ct_MANIFEST_TOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_MANIFEST_TOOL="mt" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL if test -n "$ac_ct_MANIFEST_TOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5 $as_echo "$ac_ct_MANIFEST_TOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_MANIFEST_TOOL" = x; then MANIFEST_TOOL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL fi else MANIFEST_TOOL="$ac_cv_prog_MANIFEST_TOOL" fi test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5 $as_echo_n "checking if $MANIFEST_TOOL is a manifest tool... " >&6; } if ${lt_cv_path_mainfest_tool+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_path_mainfest_tool=no echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&5 $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out cat conftest.err >&5 if $GREP 'Manifest Tool' conftest.out > /dev/null; then lt_cv_path_mainfest_tool=yes fi rm -f conftest* fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5 $as_echo "$lt_cv_path_mainfest_tool" >&6; } if test "x$lt_cv_path_mainfest_tool" != xyes; then MANIFEST_TOOL=: fi case $host_os in rhapsody* | darwin*) if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args. set dummy ${ac_tool_prefix}dsymutil; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_DSYMUTIL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$DSYMUTIL"; then ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi DSYMUTIL=$ac_cv_prog_DSYMUTIL if test -n "$DSYMUTIL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5 $as_echo "$DSYMUTIL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_DSYMUTIL"; then ac_ct_DSYMUTIL=$DSYMUTIL # Extract the first word of "dsymutil", so it can be a program name with args. set dummy dsymutil; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_DSYMUTIL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_DSYMUTIL"; then ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_DSYMUTIL="dsymutil" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL if test -n "$ac_ct_DSYMUTIL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5 $as_echo "$ac_ct_DSYMUTIL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_DSYMUTIL" = x; then DSYMUTIL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac DSYMUTIL=$ac_ct_DSYMUTIL fi else DSYMUTIL="$ac_cv_prog_DSYMUTIL" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args. set dummy ${ac_tool_prefix}nmedit; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_NMEDIT+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$NMEDIT"; then ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi NMEDIT=$ac_cv_prog_NMEDIT if test -n "$NMEDIT"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5 $as_echo "$NMEDIT" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_NMEDIT"; then ac_ct_NMEDIT=$NMEDIT # Extract the first word of "nmedit", so it can be a program name with args. set dummy nmedit; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_NMEDIT+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_NMEDIT"; then ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_NMEDIT="nmedit" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT if test -n "$ac_ct_NMEDIT"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5 $as_echo "$ac_ct_NMEDIT" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_NMEDIT" = x; then NMEDIT=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac NMEDIT=$ac_ct_NMEDIT fi else NMEDIT="$ac_cv_prog_NMEDIT" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args. set dummy ${ac_tool_prefix}lipo; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_LIPO+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$LIPO"; then ac_cv_prog_LIPO="$LIPO" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_LIPO="${ac_tool_prefix}lipo" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi LIPO=$ac_cv_prog_LIPO if test -n "$LIPO"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5 $as_echo "$LIPO" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_LIPO"; then ac_ct_LIPO=$LIPO # Extract the first word of "lipo", so it can be a program name with args. set dummy lipo; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_LIPO+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_LIPO"; then ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_LIPO="lipo" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO if test -n "$ac_ct_LIPO"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5 $as_echo "$ac_ct_LIPO" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_LIPO" = x; then LIPO=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac LIPO=$ac_ct_LIPO fi else LIPO="$ac_cv_prog_LIPO" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args. set dummy ${ac_tool_prefix}otool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OTOOL"; then ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OTOOL="${ac_tool_prefix}otool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OTOOL=$ac_cv_prog_OTOOL if test -n "$OTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5 $as_echo "$OTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OTOOL"; then ac_ct_OTOOL=$OTOOL # Extract the first word of "otool", so it can be a program name with args. set dummy otool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OTOOL"; then ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OTOOL="otool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL if test -n "$ac_ct_OTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5 $as_echo "$ac_ct_OTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OTOOL" = x; then OTOOL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OTOOL=$ac_ct_OTOOL fi else OTOOL="$ac_cv_prog_OTOOL" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args. set dummy ${ac_tool_prefix}otool64; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OTOOL64+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OTOOL64"; then ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OTOOL64=$ac_cv_prog_OTOOL64 if test -n "$OTOOL64"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5 $as_echo "$OTOOL64" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OTOOL64"; then ac_ct_OTOOL64=$OTOOL64 # Extract the first word of "otool64", so it can be a program name with args. set dummy otool64; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OTOOL64+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OTOOL64"; then ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OTOOL64="otool64" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64 if test -n "$ac_ct_OTOOL64"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5 $as_echo "$ac_ct_OTOOL64" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OTOOL64" = x; then OTOOL64=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OTOOL64=$ac_ct_OTOOL64 fi else OTOOL64="$ac_cv_prog_OTOOL64" fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5 $as_echo_n "checking for -single_module linker flag... " >&6; } if ${lt_cv_apple_cc_single_mod+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_apple_cc_single_mod=no if test -z "${LT_MULTI_MODULE}"; then # By default we will add the -single_module flag. You can override # by either setting the environment variable LT_MULTI_MODULE # non-empty at configure time, or by adding -multi_module to the # link flags. rm -rf libconftest.dylib* echo "int foo(void){return 1;}" > conftest.c echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ -dynamiclib -Wl,-single_module conftest.c" >&5 $LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ -dynamiclib -Wl,-single_module conftest.c 2>conftest.err _lt_result=$? # If there is a non-empty error log, and "single_module" # appears in it, assume the flag caused a linker warning if test -s conftest.err && $GREP single_module conftest.err; then cat conftest.err >&5 # Otherwise, if the output was created with a 0 exit code from # the compiler, it worked. elif test -f libconftest.dylib && test $_lt_result -eq 0; then lt_cv_apple_cc_single_mod=yes else cat conftest.err >&5 fi rm -rf libconftest.dylib* rm -f conftest.* fi fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5 $as_echo "$lt_cv_apple_cc_single_mod" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5 $as_echo_n "checking for -exported_symbols_list linker flag... " >&6; } if ${lt_cv_ld_exported_symbols_list+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ld_exported_symbols_list=no save_LDFLAGS=$LDFLAGS echo "_main" > conftest.sym LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_cv_ld_exported_symbols_list=yes else lt_cv_ld_exported_symbols_list=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS="$save_LDFLAGS" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5 $as_echo "$lt_cv_ld_exported_symbols_list" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5 $as_echo_n "checking for -force_load linker flag... " >&6; } if ${lt_cv_ld_force_load+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ld_force_load=no cat > conftest.c << _LT_EOF int forced_loaded() { return 2;} _LT_EOF echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&5 $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&5 echo "$AR cru libconftest.a conftest.o" >&5 $AR cru libconftest.a conftest.o 2>&5 echo "$RANLIB libconftest.a" >&5 $RANLIB libconftest.a 2>&5 cat > conftest.c << _LT_EOF int main() { return 0;} _LT_EOF echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&5 $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err _lt_result=$? if test -s conftest.err && $GREP force_load conftest.err; then cat conftest.err >&5 elif test -f conftest && test $_lt_result -eq 0 && $GREP forced_load conftest >/dev/null 2>&1 ; then lt_cv_ld_force_load=yes else cat conftest.err >&5 fi rm -f conftest.err libconftest.a conftest conftest.c rm -rf conftest.dSYM fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5 $as_echo "$lt_cv_ld_force_load" >&6; } case $host_os in rhapsody* | darwin1.[012]) _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;; darwin1.*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; darwin*) # darwin 5.x on # if running on 10.5 or later, the deployment target defaults # to the OS version, if on x86, and 10.4, the deployment # target defaults to 10.4. Don't you love it? case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in 10.0,*86*-darwin8*|10.0,*-darwin[91]*) _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; 10.[012]*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; 10.*) _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; esac ;; esac if test "$lt_cv_apple_cc_single_mod" = "yes"; then _lt_dar_single_mod='$single_module' fi if test "$lt_cv_ld_exported_symbols_list" = "yes"; then _lt_dar_export_syms=' ${wl}-exported_symbols_list,$output_objdir/${libname}-symbols.expsym' else _lt_dar_export_syms='~$NMEDIT -s $output_objdir/${libname}-symbols.expsym ${lib}' fi if test "$DSYMUTIL" != ":" && test "$lt_cv_ld_force_load" = "no"; then _lt_dsymutil='~$DSYMUTIL $lib || :' else _lt_dsymutil= fi ;; esac for ac_header in dlfcn.h do : ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default " if test "x$ac_cv_header_dlfcn_h" = xyes; then : cat >>confdefs.h <<_ACEOF #define HAVE_DLFCN_H 1 _ACEOF fi done # Set options enable_dlopen=no enable_win32_dll=no # Check whether --enable-shared was given. if test "${enable_shared+set}" = set; then : enableval=$enable_shared; p=${PACKAGE-default} case $enableval in yes) enable_shared=yes ;; no) enable_shared=no ;; *) enable_shared=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_shared=yes fi done IFS="$lt_save_ifs" ;; esac else enable_shared=yes fi # Check whether --enable-static was given. if test "${enable_static+set}" = set; then : enableval=$enable_static; p=${PACKAGE-default} case $enableval in yes) enable_static=yes ;; no) enable_static=no ;; *) enable_static=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_static=yes fi done IFS="$lt_save_ifs" ;; esac else enable_static=yes fi # Check whether --with-pic was given. if test "${with_pic+set}" = set; then : withval=$with_pic; lt_p=${PACKAGE-default} case $withval in yes|no) pic_mode=$withval ;; *) pic_mode=default # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for lt_pkg in $withval; do IFS="$lt_save_ifs" if test "X$lt_pkg" = "X$lt_p"; then pic_mode=yes fi done IFS="$lt_save_ifs" ;; esac else pic_mode=default fi test -z "$pic_mode" && pic_mode=default # Check whether --enable-fast-install was given. if test "${enable_fast_install+set}" = set; then : enableval=$enable_fast_install; p=${PACKAGE-default} case $enableval in yes) enable_fast_install=yes ;; no) enable_fast_install=no ;; *) enable_fast_install=no # Look at the argument we got. We use all the common list separators. lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR," for pkg in $enableval; do IFS="$lt_save_ifs" if test "X$pkg" = "X$p"; then enable_fast_install=yes fi done IFS="$lt_save_ifs" ;; esac else enable_fast_install=yes fi # This can be used to rebuild libtool when needed LIBTOOL_DEPS="$ltmain" # Always use our own libtool. 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*) archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' hardcode_libdir_flag_spec='${wl}-rpath,$libdir' ;; esac fi else ld_shlibs=no fi ;; os2*) hardcode_libdir_flag_spec='-L$libdir' hardcode_minus_L=yes allow_undefined_flag=unsupported archive_cmds='$ECHO "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~echo DATA >> $output_objdir/$libname.def~echo " SINGLE NONSHARED" >> $output_objdir/$libname.def~echo EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def' old_archive_from_new_cmds='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def' ;; osf3*) if test "$GCC" = yes; then allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*' archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && func_echo_all "${wl}-set_version ${wl}$verstring"` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib' else allow_undefined_flag=' -expect_unresolved \*' archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry ${output_objdir}/so_locations -o $lib' fi archive_cmds_need_lc='no' hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir' hardcode_libdir_separator=: ;; 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solaris*) no_undefined_flag=' -z defs' if test "$GCC" = yes; then wlarc='${wl}' archive_cmds='$CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -shared $pic_flag ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' else case `$CC -V 2>&1` in *"Compilers 5.0"*) wlarc='' archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' ;; *) wlarc='${wl}' archive_cmds='$CC -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' ;; esac fi hardcode_libdir_flag_spec='-R$libdir' hardcode_shlibpath_var=no case $host_os in solaris2.[0-5] | solaris2.[0-5].*) ;; *) # The compiler driver will combine and reorder linker options, # but understands `-z linker_flag'. GCC discards it without `$wl', # but is careful enough not to reorder. # Supported since Solaris 2.6 (maybe 2.5.1?) if test "$GCC" = yes; then whole_archive_flag_spec='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract' else whole_archive_flag_spec='-z allextract$convenience -z defaultextract' fi ;; esac link_all_deplibs=yes ;; sunos4*) if test "x$host_vendor" = xsequent; then # Use $CC to link under sequent, because it throws in some extra .o # files that make .init and .fini sections work. archive_cmds='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags' else archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags' fi hardcode_libdir_flag_spec='-L$libdir' hardcode_direct=yes hardcode_minus_L=yes hardcode_shlibpath_var=no ;; sysv4) case $host_vendor in sni) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_direct=yes # is this really true??? ;; siemens) ## LD is ld it makes a PLAMLIB ## CC just makes a GrossModule. archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags' reload_cmds='$CC -r -o $output$reload_objs' hardcode_direct=no ;; motorola) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_direct=no #Motorola manual says yes, but my tests say they lie ;; esac runpath_var='LD_RUN_PATH' hardcode_shlibpath_var=no ;; sysv4.3*) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_shlibpath_var=no export_dynamic_flag_spec='-Bexport' ;; sysv4*MP*) if test -d /usr/nec; then archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_shlibpath_var=no runpath_var=LD_RUN_PATH hardcode_runpath_var=yes ld_shlibs=yes fi ;; sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*) no_undefined_flag='${wl}-z,text' archive_cmds_need_lc=no hardcode_shlibpath_var=no runpath_var='LD_RUN_PATH' if test "$GCC" = yes; then archive_cmds='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' else archive_cmds='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags' fi ;; sysv5* | sco3.2v5* | sco5v6*) # Note: We can NOT use -z defs as we might desire, because we do not # link with -lc, and that would cause any symbols used from libc to # always be unresolved, which means just about no library would # ever link correctly. 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The import file would start with # the line `#! .'. This would cause the generated library to # depend on `.', always an invalid library. This was fixed in # development snapshots of GCC prior to 3.0. case $host_os in aix4 | aix4.[01] | aix4.[01].*) if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)' echo ' yes ' echo '#endif'; } | ${CC} -E - | $GREP yes > /dev/null; then : else can_build_shared=no fi ;; esac # AIX (on Power*) has no versioning support, so currently we can not hardcode correct # soname into executable. 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do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done' ;; esac ;; beos*) library_names_spec='${libname}${shared_ext}' dynamic_linker="$host_os ld.so" shlibpath_var=LIBRARY_PATH ;; bsdi[45]*) version_type=linux # correct to gnu/linux during the next big refactor need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir' shlibpath_var=LD_LIBRARY_PATH sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib" sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib" # the default ld.so.conf also contains /usr/contrib/lib and # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow # libtool to hard-code these into programs ;; 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then sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib" else sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64" fi sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec ;; hppa*64*) shrext_cmds='.sl' hardcode_into_libs=yes dynamic_linker="$host_os dld.sl" shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH shlibpath_overrides_runpath=yes # Unless +noenvvar is specified. library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64" sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec ;; *) shrext_cmds='.sl' dynamic_linker="$host_os dld.sl" shlibpath_var=SHLIB_PATH shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' ;; esac # HP-UX runs *really* slowly unless shared libraries are mode 555, ... postinstall_cmds='chmod 555 $lib' # or fails outright, so override atomically: install_override_mode=555 ;; interix[3-9]*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes ;; irix5* | irix6* | nonstopux*) case $host_os in nonstopux*) version_type=nonstopux ;; *) if test "$lt_cv_prog_gnu_ld" = yes; then version_type=linux # correct to gnu/linux during the next big refactor else version_type=irix fi ;; esac need_lib_prefix=no need_version=no soname_spec='${libname}${release}${shared_ext}$major' library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext} $libname${shared_ext}' case $host_os in irix5* | nonstopux*) libsuff= shlibsuff= ;; *) case $LD in # libtool.m4 will add one of these switches to LD *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ") libsuff= shlibsuff= libmagic=32-bit;; *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ") libsuff=32 shlibsuff=N32 libmagic=N32;; *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ") libsuff=64 shlibsuff=64 libmagic=64-bit;; *) libsuff= shlibsuff= libmagic=never-match;; esac ;; esac shlibpath_var=LD_LIBRARY${shlibsuff}_PATH shlibpath_overrides_runpath=no sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}" sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}" hardcode_into_libs=yes ;; # No shared lib support for Linux oldld, aout, or coff. linux*oldld* | linux*aout* | linux*coff*) dynamic_linker=no ;; # This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no # Some binutils ld are patched to set DT_RUNPATH if ${lt_cv_shlibpath_overrides_runpath+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_shlibpath_overrides_runpath=no save_LDFLAGS=$LDFLAGS save_libdir=$libdir eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \ LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\"" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : if ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then : lt_cv_shlibpath_overrides_runpath=yes fi fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS=$save_LDFLAGS libdir=$save_libdir fi shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath # This implies no fast_install, which is unacceptable. # Some rework will be needed to allow for fast_install # before this can be enabled. hardcode_into_libs=yes # Append ld.so.conf contents to the search path if test -f /etc/ld.so.conf; then lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); 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esac else shlibpath_overrides_runpath=yes fi ;; os2*) libname_spec='$name' shrext_cmds=".dll" need_lib_prefix=no library_names_spec='$libname${shared_ext} $libname.a' dynamic_linker='OS/2 ld.exe' shlibpath_var=LIBPATH ;; osf3* | osf4* | osf5*) version_type=osf need_lib_prefix=no need_version=no soname_spec='${libname}${release}${shared_ext}$major' library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' shlibpath_var=LD_LIBRARY_PATH sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib" sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec" ;; rdos*) dynamic_linker=no ;; solaris*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes hardcode_into_libs=yes # ldd complains unless libraries are executable postinstall_cmds='chmod +x $lib' ;; 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sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) version_type=freebsd-elf need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes hardcode_into_libs=yes if test "$with_gnu_ld" = yes; then sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib' else sys_lib_search_path_spec='/usr/ccs/lib /usr/lib' case $host_os in sco3.2v5*) sys_lib_search_path_spec="$sys_lib_search_path_spec /lib" ;; esac fi sys_lib_dlsearch_path_spec='/usr/lib' ;; tpf*) # TPF is a cross-target only. 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" >&6; } if ${ac_cv_lib_dl_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldl $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dl_dlopen=yes else ac_cv_lib_dl_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 $as_echo "$ac_cv_lib_dl_dlopen" >&6; } if test "x$ac_cv_lib_dl_dlopen" = xyes; then : lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl" else lt_cv_dlopen="dyld" lt_cv_dlopen_libs= lt_cv_dlopen_self=yes fi ;; *) ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load" if test "x$ac_cv_func_shl_load" = xyes; then : lt_cv_dlopen="shl_load" else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5 $as_echo_n "checking for shl_load in -ldld... " >&6; } if ${ac_cv_lib_dld_shl_load+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldld $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char shl_load (); int main () { return shl_load (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dld_shl_load=yes else ac_cv_lib_dld_shl_load=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5 $as_echo "$ac_cv_lib_dld_shl_load" >&6; } if test "x$ac_cv_lib_dld_shl_load" = xyes; then : lt_cv_dlopen="shl_load" lt_cv_dlopen_libs="-ldld" else ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen" if test "x$ac_cv_func_dlopen" = xyes; then : lt_cv_dlopen="dlopen" else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5 $as_echo_n "checking for dlopen in -ldl... " >&6; } if ${ac_cv_lib_dl_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldl $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dl_dlopen=yes else ac_cv_lib_dl_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 $as_echo "$ac_cv_lib_dl_dlopen" >&6; } if test "x$ac_cv_lib_dl_dlopen" = xyes; then : lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl" else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5 $as_echo_n "checking for dlopen in -lsvld... " >&6; } if ${ac_cv_lib_svld_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-lsvld $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_svld_dlopen=yes else ac_cv_lib_svld_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5 $as_echo "$ac_cv_lib_svld_dlopen" >&6; } if test "x$ac_cv_lib_svld_dlopen" = xyes; then : lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld" else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5 $as_echo_n "checking for dld_link in -ldld... " >&6; } if ${ac_cv_lib_dld_dld_link+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldld $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dld_link (); int main () { return dld_link (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dld_dld_link=yes else ac_cv_lib_dld_dld_link=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5 $as_echo "$ac_cv_lib_dld_dld_link" >&6; } if test "x$ac_cv_lib_dld_dld_link" = xyes; then : lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-ldld" fi fi fi fi fi fi ;; esac if test "x$lt_cv_dlopen" != xno; then enable_dlopen=yes else enable_dlopen=no fi case $lt_cv_dlopen in dlopen) save_CPPFLAGS="$CPPFLAGS" test "x$ac_cv_header_dlfcn_h" = xyes && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H" save_LDFLAGS="$LDFLAGS" wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\" save_LIBS="$LIBS" LIBS="$lt_cv_dlopen_libs $LIBS" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5 $as_echo_n "checking whether a program can dlopen itself... " >&6; } if ${lt_cv_dlopen_self+:} false; then : $as_echo_n "(cached) " >&6 else if test "$cross_compiling" = yes; then : lt_cv_dlopen_self=cross else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF #line $LINENO "configure" #include "confdefs.h" #if HAVE_DLFCN_H #include #endif #include #ifdef RTLD_GLOBAL # define LT_DLGLOBAL RTLD_GLOBAL #else # ifdef DL_GLOBAL # define LT_DLGLOBAL DL_GLOBAL # else # define LT_DLGLOBAL 0 # endif #endif /* We may have to define LT_DLLAZY_OR_NOW in the command line if we find out it does not work in some platform. */ #ifndef LT_DLLAZY_OR_NOW # ifdef RTLD_LAZY # define LT_DLLAZY_OR_NOW RTLD_LAZY # else # ifdef DL_LAZY # define LT_DLLAZY_OR_NOW DL_LAZY # else # ifdef RTLD_NOW # define LT_DLLAZY_OR_NOW RTLD_NOW # else # ifdef DL_NOW # define LT_DLLAZY_OR_NOW DL_NOW # else # define LT_DLLAZY_OR_NOW 0 # endif # endif # endif # endif #endif /* When -fvisbility=hidden is used, assume the code has been annotated correspondingly for the symbols needed. */ #if defined(__GNUC__) && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) int fnord () __attribute__((visibility("default"))); #endif int fnord () { return 42; } int main () { void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); int status = $lt_dlunknown; if (self) { if (dlsym (self,"fnord")) status = $lt_dlno_uscore; else { if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; else puts (dlerror ()); } /* dlclose (self); */ } else puts (dlerror ()); return status; } _LT_EOF if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 (eval $ac_link) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } && test -s conftest${ac_exeext} 2>/dev/null; then (./conftest; exit; ) >&5 2>/dev/null lt_status=$? case x$lt_status in x$lt_dlno_uscore) lt_cv_dlopen_self=yes ;; x$lt_dlneed_uscore) lt_cv_dlopen_self=yes ;; x$lt_dlunknown|x*) lt_cv_dlopen_self=no ;; esac else : # compilation failed lt_cv_dlopen_self=no fi fi rm -fr conftest* fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5 $as_echo "$lt_cv_dlopen_self" >&6; } if test "x$lt_cv_dlopen_self" = xyes; then wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5 $as_echo_n "checking whether a statically linked program can dlopen itself... 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|| _lt_function_replace_fail=: fi if test x"$_lt_function_replace_fail" = x":"; then { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Unable to substitute extended shell functions in $ofile" >&5 $as_echo "$as_me: WARNING: Unable to substitute extended shell functions in $ofile" >&2;} fi mv -f "$cfgfile" "$ofile" || (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile") chmod +x "$ofile" ;; esac done # for ac_tag as_fn_exit 0 _ACEOF ac_clean_files=$ac_clean_files_save test $ac_write_fail = 0 || as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5 # configure is writing to config.log, and then calls config.status. # config.status does its own redirection, appending to config.log. # Unfortunately, on DOS this fails, as config.log is still kept open # by configure, so config.status won't be able to write to it; its # output is simply discarded. So we exec the FD to /dev/null, # effectively closing config.log, so it can be properly (re)opened and # appended to by config.status. When coming back to configure, we # need to make the FD available again. if test "$no_create" != yes; then ac_cs_success=: ac_config_status_args= test "$silent" = yes && ac_config_status_args="$ac_config_status_args --quiet" exec 5>/dev/null $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false exec 5>>config.log # Use ||, not &&, to avoid exiting from the if with $? = 1, which # would make configure fail if this is the last instruction. $ac_cs_success || as_fn_exit 1 fi if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;} fi tarantool_1.6.7.588.g76bbd9c/third_party/libeio/eio.pod0000664000000000000000000010046412634006617021231 0ustar rootroot=head1 NAME libeio - truly asynchronous POSIX I/O =head1 SYNOPSIS #include =head1 DESCRIPTION The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: L. Note that this library is a by-product of the C perl module, and many of the subtler points regarding requests lifetime and so on are only documented in its documentation at the moment: L. =head2 FEATURES This library provides fully asynchronous versions of most POSIX functions dealing with I/O. Unlike most asynchronous libraries, this not only includes C and C, but also C, C, C and similar functions, as well as less rarely ones such as C, C or C. It also offers wrappers around C (Solaris, Linux, HP-UX and FreeBSD, with emulation on other platforms) and C (Linux, with emulation elsewhere). The goal is to enable you to write fully non-blocking programs. For example, in a game server, you would not want to freeze for a few seconds just because the server is running a backup and you happen to call C. =head2 TIME REPRESENTATION Libeio represents time as a single floating point number, representing the (fractional) number of seconds since the (POSIX) epoch (somewhere near the beginning of 1970, details are complicated, don't ask). This type is called C, but it is guaranteed to be of type C (or better), so you can freely use C yourself. Unlike the name component C might indicate, it is also used for time differences throughout libeio. =head2 FORK SUPPORT Usage of pthreads in a program changes the semantics of fork considerably. Specifically, only async-safe functions can be called after fork. Libeio uses pthreads, so this applies, and makes using fork hard for anything but relatively fork + exec uses. This library only works in the process that initialised it: Forking is fully supported, but using libeio in any other process than the one that called C is not. You might get around by not I libeio before (or after) forking in the parent, and using it in the child afterwards. You could also try to call the L function again in the child, which will brutally reinitialise all data structures, which isn't POSIX conformant, but typically works. Otherwise, the only recommendation you should follow is: treat fork code the same way you treat signal handlers, and only ever call C in the process that uses it, and only once ever. =head1 INITIALISATION/INTEGRATION Before you can call any eio functions you first have to initialise the library. The library integrates into any event loop, but can also be used without one, including in polling mode. You have to provide the necessary glue yourself, however. =over 4 =item int eio_init (void (*want_poll)(void), void (*done_poll)(void)) This function initialises the library. On success it returns C<0>, on failure it returns C<-1> and sets C appropriately. It accepts two function pointers specifying callbacks as argument, both of which can be C<0>, in which case the callback isn't called. There is currently no way to change these callbacks later, or to "uninitialise" the library again. =item want_poll callback The C callback is invoked whenever libeio wants attention (i.e. it wants to be polled by calling C). It is "edge-triggered", that is, it will only be called once when eio wants attention, until all pending requests have been handled. This callback is called while locks are being held, so I. That includes C. What you should do is notify some other thread, or wake up your event loop, and then call C. =item done_poll callback This callback is invoked when libeio detects that all pending requests have been handled. It is "edge-triggered", that is, it will only be called once after C. To put it differently, C and C are invoked in pairs: after C you have to call C until either C indicates that everything has been handled or C has been called, which signals the same. Note that C might return after C and C have been called again, so watch out for races in your code. As with C, this callback is called while locks are being held, so you I. =item int eio_poll () This function has to be called whenever there are pending requests that need finishing. You usually call this after C has indicated that you should do so, but you can also call this function regularly to poll for new results. If any request invocation returns a non-zero value, then C immediately returns with that value as return value. Otherwise, if all requests could be handled, it returns C<0>. If for some reason not all requests have been handled, i.e. some are still pending, it returns C<-1>. =back For libev, you would typically use an C watcher: the C callback would invoke C to wake up the event loop. Inside the callback set for the watcher, one would call C. If C is configured to not handle all results in one go (i.e. it returns C<-1>) then you should start an idle watcher that calls C until it returns something C. A full-featured connector between libeio and libev would look as follows (if C is handling all requests, it can of course be simplified a lot by removing the idle watcher logic): static struct ev_loop *loop; static ev_idle repeat_watcher; static ev_async ready_watcher; /* idle watcher callback, only used when eio_poll */ /* didn't handle all results in one call */ static void repeat (EV_P_ ev_idle *w, int revents) { if (eio_poll () != -1) ev_idle_stop (EV_A_ w); } /* eio has some results, process them */ static void ready (EV_P_ ev_async *w, int revents) { if (eio_poll () == -1) ev_idle_start (EV_A_ &repeat_watcher); } /* wake up the event loop */ static void want_poll (void) { ev_async_send (loop, &ready_watcher) } void my_init_eio () { loop = EV_DEFAULT; ev_idle_init (&repeat_watcher, repeat); ev_async_init (&ready_watcher, ready); ev_async_start (loop, &watcher); eio_init (want_poll, 0); } For most other event loops, you would typically use a pipe - the event loop should be told to wait for read readiness on the read end. In C you would write a single byte, in C you would try to read that byte, and in the callback for the read end, you would call C. You don't have to take special care in the case C doesn't handle all requests, as the done callback will not be invoked, so the event loop will still signal readiness for the pipe until I results have been processed. =head1 HIGH LEVEL REQUEST API Libeio has both a high-level API, which consists of calling a request function with a callback to be called on completion, and a low-level API where you fill out request structures and submit them. This section describes the high-level API. =head2 REQUEST SUBMISSION AND RESULT PROCESSING You submit a request by calling the relevant C function with the required parameters, a callback of type C (called C below) and a freely usable C argument. The return value will either be 0, in case something went really wrong (which can basically only happen on very fatal errors, such as C returning 0, which is rather unlikely), or a pointer to the newly-created and submitted C. The callback will be called with an C which contains the results of the request. The members you can access inside that structure vary from request to request, except for: =over 4 =item C This contains the result value from the call (usually the same as the syscall of the same name). =item C This contains the value of C after the call. =item C The C member simply stores the value of the C argument. =back Members not explicitly described as accessible must not be accessed. Specifically, there is no guarantee that any members will still have the value they had when the request was submitted. The return value of the callback is normally C<0>, which tells libeio to continue normally. If a callback returns a nonzero value, libeio will stop processing results (in C) and will return the value to its caller. Memory areas passed to libeio wrappers must stay valid as long as a request executes, with the exception of paths, which are being copied internally. Any memory libeio itself allocates will be freed after the finish callback has been called. If you want to manage all memory passed to libeio yourself you can use the low-level API. For example, to open a file, you could do this: static int file_open_done (eio_req *req) { if (req->result < 0) { /* open() returned -1 */ errno = req->errorno; perror ("open"); } else { int fd = req->result; /* now we have the new fd in fd */ } return 0; } /* the first three arguments are passed to open(2) */ /* the remaining are priority, callback and data */ if (!eio_open ("/etc/passwd", O_RDONLY, 0, 0, file_open_done, 0)) abort (); /* something went wrong, we will all die!!! */ Note that you additionally need to call C when the C indicates that requests are ready to be processed. =head2 CANCELLING REQUESTS Sometimes the need for a request goes away before the request is finished. In that case, one can cancel the request by a call to C: =over 4 =item eio_cancel (eio_req *req) Cancel the request (and all its subrequests). If the request is currently executing it might still continue to execute, and in other cases it might still take a while till the request is cancelled. When cancelled, the finish callback will not be invoked. C is still true for requests that have successfully executed, as long as C was called on them at some point. =back =head2 AVAILABLE REQUESTS The following request functions are available. I of them return the C on success and C<0> on failure, and I of them have the same three trailing arguments: C, C and C. The C is mandatory, but in most cases, you pass in C<0> as C and C<0> or some custom data value as C. =head3 POSIX API WRAPPERS These requests simply wrap the POSIX call of the same name, with the same arguments. If a function is not implemented by the OS and cannot be emulated in some way, then all of these return C<-1> and set C to C. =over 4 =item eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) =item eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) =item eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) =item eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) =item eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) =item eio_rmdir (const char *path, int pri, eio_cb cb, void *data) =item eio_unlink (const char *path, int pri, eio_cb cb, void *data) =item eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data) =item eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) =item eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) =item eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) =item eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) =item eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) =item eio_close (int fd, int pri, eio_cb cb, void *data) =item eio_sync (int pri, eio_cb cb, void *data) =item eio_fsync (int fd, int pri, eio_cb cb, void *data) =item eio_fdatasync (int fd, int pri, eio_cb cb, void *data) =item eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data) =item eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) =item eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) =item eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) =item eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) These have the same semantics as the syscall of the same name, their return value is available as C<< req->result >> later. =item eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) =item eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) These two requests are called C and C, but actually wrap C and C. On systems that lack these calls (such as cygwin), libeio uses lseek/read_or_write/lseek and a mutex to serialise the requests, so all these requests run serially and do not disturb each other. However, they still disturb the file offset while they run, so it's not safe to call these functions concurrently with non-libeio functions on the same fd on these systems. Not surprisingly, pread and pwrite are not thread-safe on Darwin (OS/X), so it is advised not to submit multiple requests on the same fd on this horrible pile of garbage. =item eio_mlockall (int flags, int pri, eio_cb cb, void *data) Like C, but the flag value constants are called C and C. =item eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) Just like msync, except that the flag values are called C, C and C. =item eio_readlink (const char *path, int pri, eio_cb cb, void *data) If successful, the path read by C can be accessed via C<< req->ptr2 >> and is I null-terminated, with the length specified as C<< req->result >>. if (req->result >= 0) { char *target = strndup ((char *)req->ptr2, req->result); free (target); } =item eio_realpath (const char *path, int pri, eio_cb cb, void *data) Similar to the realpath libc function, but unlike that one, C<< req->result >> is C<-1> on failure. On success, the result is the length of the returned path in C (which is I 0-terminated) - this is similar to readlink. =item eio_stat (const char *path, int pri, eio_cb cb, void *data) =item eio_lstat (const char *path, int pri, eio_cb cb, void *data) =item eio_fstat (int fd, int pri, eio_cb cb, void *data) Stats a file - if C<< req->result >> indicates success, then you can access the C-like structure via C<< req->ptr2 >>: EIO_STRUCT_STAT *statdata = (EIO_STRUCT_STAT *)req->ptr2; =item eio_statvfs (const char *path, int pri, eio_cb cb, void *data) =item eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) Stats a filesystem - if C<< req->result >> indicates success, then you can access the C-like structure via C<< req->ptr2 >>: EIO_STRUCT_STATVFS *statdata = (EIO_STRUCT_STATVFS *)req->ptr2; =back =head3 READING DIRECTORIES Reading directories sounds simple, but can be rather demanding, especially if you want to do stuff such as traversing a directory hierarchy or processing all files in a directory. Libeio can assist these complex tasks with it's C call. =over 4 =item eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) This is a very complex call. It basically reads through a whole directory (via the C, C and C calls) and returns either the names or an array of C, depending on the C argument. The C<< req->result >> indicates either the number of files found, or C<-1> on error. On success, null-terminated names can be found as C<< req->ptr2 >>, and C, if requested by C, can be found via C<< req->ptr1 >>. Here is an example that prints all the names: int i; char *names = (char *)req->ptr2; for (i = 0; i < req->result; ++i) { printf ("name #%d: %s\n", i, names); /* move to next name */ names += strlen (names) + 1; } Pseudo-entries such as F<.> and F<..> are never returned by C. C can be any combination of: =over 4 =item EIO_READDIR_DENTS If this flag is specified, then, in addition to the names in C, also an array of C is returned, in C. A C looks like this: struct eio_dirent { int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ unsigned short namelen; /* size of filename without trailing 0 */ unsigned char type; /* one of EIO_DT_* */ signed char score; /* internal use */ ino_t inode; /* the inode number, if available, otherwise unspecified */ }; The only members you normally would access are C, which is the byte-offset from C to the start of the name, C and C. C can be one of: C - if the type is not known (very common) and you have to C the name yourself if you need to know, one of the "standard" POSIX file types (C, C, C, C, C, C, C) or some OS-specific type (currently C - multiplexed char device (v7+coherent), C - xenix special named file, C - multiplexed block device (v7+coherent), C - HP-UX network special, C - VxFS compressed, C - solaris door, or C). This example prints all names and their type: int i; struct eio_dirent *ents = (struct eio_dirent *)req->ptr1; char *names = (char *)req->ptr2; for (i = 0; i < req->result; ++i) { struct eio_dirent *ent = ents + i; char *name = names + ent->nameofs; printf ("name #%d: %s (type %d)\n", i, name, ent->type); } =item EIO_READDIR_DIRS_FIRST When this flag is specified, then the names will be returned in an order where likely directories come first, in optimal C order. This is useful when you need to quickly find directories, or you want to find all directories while avoiding to stat() each entry. If the system returns type information in readdir, then this is used to find directories directly. Otherwise, likely directories are names beginning with ".", or otherwise names with no dots, of which names with short names are tried first. =item EIO_READDIR_STAT_ORDER When this flag is specified, then the names will be returned in an order suitable for stat()'ing each one. That is, when you plan to stat() all files in the given directory, then the returned order will likely be fastest. If both this flag and C are specified, then the likely directories come first, resulting in a less optimal stat order. =item EIO_READDIR_FOUND_UNKNOWN This flag should not be specified when calling C. Instead, it is being set by C (you can access the C via C<< req->int1 >>, when any of the C's found were C. The absence of this flag therefore indicates that all C's are known, which can be used to speed up some algorithms. A typical use case would be to identify all subdirectories within a directory - you would ask C for C. If then this flag is I set, then all the entries at the beginning of the returned array of type C are the directories. Otherwise, you should start C'ing the entries starting at the beginning of the array, stopping as soon as you found all directories (the count can be deduced by the link count of the directory). =back =back =head3 OS-SPECIFIC CALL WRAPPERS These wrap OS-specific calls (usually Linux ones), and might or might not be emulated on other operating systems. Calls that are not emulated will return C<-1> and set C to C. =over 4 =item eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) Wraps the C syscall. The arguments follow the Linux version, but libeio supports and will use similar calls on FreeBSD, HP/UX, Solaris and Darwin. If the OS doesn't support some sendfile-like call, or the call fails, indicating support for the given file descriptor type (for example, Linux's sendfile might not support file to file copies), then libeio will emulate the call in userspace, so there are almost no limitations on its use. =item eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) Calls C. If the syscall is missing, then the call is emulated by simply reading the data (currently in 64kiB chunks). =item eio_syncfs (int fd, int pri, eio_cb cb, void *data) Calls Linux' C syscall, if available. Returns C<-1> and sets C to C if the call is missing I, if the C is C<< >= 0 >>, so you can probe for the availability of the syscall with a negative C argument and checking for C<-1/ENOSYS>. =item eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) Calls C. If the syscall is missing, then this is the same as calling C. Flags can be any combination of C, C and C. =item eio_fallocate (int fd, int mode, off_t offset, off_t len, int pri, eio_cb cb, void *data) Calls C (note: I C!). If the syscall is missing, then it returns failure and sets C to C. The C argument can be C<0> (for behaviour similar to C), or C, which keeps the size of the file unchanged (but still preallocates space beyond end of file). =back =head3 LIBEIO-SPECIFIC REQUESTS These requests are specific to libeio and do not correspond to any OS call. =over 4 =item eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) Reads (C) or modifies (C) the given memory area, page-wise, that is, it reads (or reads and writes back) the first octet of every page that spans the memory area. This can be used to page in some mmapped file, or dirty some pages. Note that dirtying is an unlocked read-write access, so races can ensue when the some other thread modifies the data stored in that memory area. =item eio_custom (void (*)(eio_req *) execute, int pri, eio_cb cb, void *data) Executes a custom request, i.e., a user-specified callback. The callback gets the C as parameter and is expected to read and modify any request-specific members. Specifically, it should set C<< req->result >> to the result value, just like other requests. Here is an example that simply calls C, like C, but it uses the C member as filename and uses a hardcoded C. If you want to pass more/other parameters, you either need to pass some struct or so via C or provide your own wrapper using the low-level API. static int my_open_done (eio_req *req) { int fd = req->result; return 0; } static void my_open (eio_req *req) { req->result = open (req->data, O_RDONLY); } eio_custom (my_open, 0, my_open_done, "/etc/passwd"); =item eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data) This is a request that takes C seconds to execute, but otherwise does nothing - it simply puts one of the worker threads to sleep for this long. This request can be used to artificially increase load, e.g. for debugging or benchmarking reasons. =item eio_nop (int pri, eio_cb cb, void *data) This request does nothing, except go through the whole request cycle. This can be used to measure latency or in some cases to simplify code, but is not really of much use. =back =head3 GROUPING AND LIMITING REQUESTS There is one more rather special request, C. It is a very special aio request: Instead of doing something, it is a container for other eio requests. There are two primary use cases for this: a) bundle many requests into a single, composite, request with a definite callback and the ability to cancel the whole request with its subrequests and b) limiting the number of "active" requests. Further below you will find more discussion of these topics - first follows the reference section detailing the request generator and other methods. =over 4 =item eio_req *grp = eio_grp (eio_cb cb, void *data) Creates, submits and returns a group request. Note that it doesn't have a priority, unlike all other requests. =item eio_grp_add (eio_req *grp, eio_req *req) Adds a request to the request group. =item eio_grp_cancel (eio_req *grp) Cancels all requests I the group, but I the group request itself. You can cancel the group request I all subrequests via a normal C call. =back =head4 GROUP REQUEST LIFETIME Left alone, a group request will instantly move to the pending state and will be finished at the next call of C. The usefulness stems from the fact that, if a subrequest is added to a group I a call to C, via C, then the group will not finish until all the subrequests have finished. So the usage cycle of a group request is like this: after it is created, you normally instantly add a subrequest. If none is added, the group request will finish on it's own. As long as subrequests are added before the group request is finished it will be kept from finishing, that is the callbacks of any subrequests can, in turn, add more requests to the group, and as long as any requests are active, the group request itself will not finish. =head4 CREATING COMPOSITE REQUESTS Imagine you wanted to create an C request that opens a file, reads it and closes it. This means it has to execute at least three eio requests, but for various reasons it might be nice if that request looked like any other eio request. This can be done with groups: =over 4 =item 1) create the request object Create a group that contains all further requests. This is the request you can return as "the load request". =item 2) open the file, maybe Next, open the file with C and add the request to the group request and you are finished setting up the request. If, for some reason, you cannot C (path is a null ptr?) you can set C<< grp->result >> to C<-1> to signal an error and let the group request finish on its own. =item 3) open callback adds more requests In the open callback, if the open was not successful, copy C<< req->errorno >> to C<< grp->errorno >> and set C<< grp->result >> to C<-1> to signal an error. Otherwise, malloc some memory or so and issue a read request, adding the read request to the group. =item 4) continue issuing requests till finished In the read callback, check for errors and possibly continue with C or any other eio request in the same way. As soon as no new requests are added, the group request will finish. Make sure you I set C<< grp->result >> to some sensible value. =back =head4 REQUEST LIMITING #TODO void eio_grp_limit (eio_req *grp, int limit); =head1 LOW LEVEL REQUEST API #TODO =head1 ANATOMY AND LIFETIME OF AN EIO REQUEST A request is represented by a structure of type C. To initialise it, clear it to all zero bytes: eio_req req; memset (&req, 0, sizeof (req)); A more common way to initialise a new C is to use C: eio_req *req = calloc (1, sizeof (*req)); In either case, libeio neither allocates, initialises or frees the C structure for you - it merely uses it. zero #TODO =head2 CONFIGURATION The functions in this section can sometimes be useful, but the default configuration will do in most case, so you should skip this section on first reading. =over 4 =item eio_set_max_poll_time (eio_tstamp nseconds) This causes C to return after it has detected that it was running for C seconds or longer (this number can be fractional). This can be used to limit the amount of time spent handling eio requests, for example, in interactive programs, you might want to limit this time to C<0.01> seconds or so. Note that: =over 4 =item a) libeio doesn't know how long your request callbacks take, so the time spent in C is up to one callback invocation longer then this interval. =item b) this is implemented by calling C after each request, which can be costly. =item c) at least one request will be handled. =back =item eio_set_max_poll_reqs (unsigned int nreqs) When C is non-zero, then C will not handle more than C requests per invocation. This is a less costly way to limit the amount of work done by C then setting a time limit. If you know your callbacks are generally fast, you could use this to encourage interactiveness in your programs by setting it to C<10>, C<100> or even C<1000>. =item eio_set_min_parallel (unsigned int nthreads) Make sure libeio can handle at least this many requests in parallel. It might be able handle more. =item eio_set_max_parallel (unsigned int nthreads) Set the maximum number of threads that libeio will spawn. =item eio_set_max_idle (unsigned int nthreads) Libeio uses threads internally to handle most requests, and will start and stop threads on demand. This call can be used to limit the number of idle threads (threads without work to do): libeio will keep some threads idle in preparation for more requests, but never longer than C threads. In addition to this, libeio will also stop threads when they are idle for a few seconds, regardless of this setting. =item unsigned int eio_nthreads () Return the number of worker threads currently running. =item unsigned int eio_nreqs () Return the number of requests currently handled by libeio. This is the total number of requests that have been submitted to libeio, but not yet destroyed. =item unsigned int eio_nready () Returns the number of ready requests, i.e. requests that have been submitted but have not yet entered the execution phase. =item unsigned int eio_npending () Returns the number of pending requests, i.e. requests that have been executed and have results, but have not been finished yet by a call to C). =back =head1 EMBEDDING Libeio can be embedded directly into programs. This functionality is not documented and not (yet) officially supported. Note that, when including C, you are responsible for defining the compilation environment (C<_LARGEFILE_SOURCE>, C<_GNU_SOURCE> etc.). If you need to know how, check the C perl module, which does exactly that. =head1 COMPILETIME CONFIGURATION These symbols, if used, must be defined when compiling F. =over 4 =item EIO_STACKSIZE This symbol governs the stack size for each eio thread. Libeio itself was written to use very little stackspace, but when using C requests, you might want to increase this. If this symbol is undefined (the default) then libeio will use its default stack size (C currently). In all other cases, the value must be an expression that evaluates to the desired stack size. =back =head1 PORTABILITY REQUIREMENTS In addition to a working ISO-C implementation, libeio relies on a few additional extensions: =over 4 =item POSIX threads To be portable, this module uses threads, specifically, the POSIX threads library must be available (and working, which partially excludes many xBSD systems, where C is buggy). =item POSIX-compatible filesystem API This is actually a harder portability requirement: The libeio API is quite demanding regarding POSIX API calls (symlinks, user/group management etc.). =item C must hold a time value in seconds with enough accuracy The type C is used to represent timestamps. It is required to have at least 51 bits of mantissa (and 9 bits of exponent), which is good enough for at least into the year 4000. This requirement is fulfilled by implementations implementing IEEE 754 (basically all existing ones). =back If you know of other additional requirements drop me a note. =head1 AUTHOR Marc Lehmann . tarantool_1.6.7.588.g76bbd9c/third_party/libeio/xthread.h0000664000000000000000000001311712634006617021557 0ustar rootroot#ifndef XTHREAD_H_ #define XTHREAD_H_ /* whether word reads are potentially non-atomic. * this is conservative, likely most arches this runs * on have atomic word read/writes. */ #ifndef WORDACCESS_UNSAFE # if __i386 || __x86_64 # define WORDACCESS_UNSAFE 0 # else # define WORDACCESS_UNSAFE 1 # endif #endif ///////////////////////////////////////////////////////////////////////////// #ifdef _WIN32 //#define NTDDI_VERSION NTDDI_WIN2K // needed to get win2000 api calls, fails with mingw #define _WIN32_WINNT 0x400 // maybe working alternative for mingw #include //D #include #include #include #include #include #include /* work around some bugs in ptw32 */ #if defined(__MINGW32__) && defined(_TIMESPEC_DEFINED) #define HAVE_STRUCT_TIMESPEC 1 #endif #include #define sigset_t int #define sigfillset(a) #define pthread_sigmask(a,b,c) #define sigaddset(a,b) #define sigemptyset(s) typedef pthread_mutex_t xmutex_t; #define X_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER #define X_MUTEX_CREATE(mutex) pthread_mutex_init (&(mutex), 0) #define X_LOCK(mutex) pthread_mutex_lock (&(mutex)) #define X_UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) typedef pthread_cond_t xcond_t; #define X_COND_INIT PTHREAD_COND_INITIALIZER #define X_COND_CREATE(cond) pthread_cond_init (&(cond), 0) #define X_COND_SIGNAL(cond) pthread_cond_signal (&(cond)) #define X_COND_WAIT(cond,mutex) pthread_cond_wait (&(cond), &(mutex)) #define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to)) typedef pthread_t xthread_t; #define X_THREAD_PROC(name) static void *name (void *thr_arg) #define X_THREAD_ATFORK(a,b,c) static int xthread_create (xthread_t *tid, void *(*proc)(void *), void *arg) { int retval; pthread_attr_t attr; pthread_attr_init (&attr); pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); retval = pthread_create (tid, &attr, proc, arg) == 0; pthread_attr_destroy (&attr); return retval; } #define respipe_read(a,b,c) PerlSock_recv ((a), (b), (c), 0) #define respipe_write(a,b,c) send ((a), (b), (c), 0) #define respipe_close(a) PerlSock_closesocket ((a)) #else ///////////////////////////////////////////////////////////////////////////// #if __linux && !defined(_GNU_SOURCE) # define _GNU_SOURCE #endif /* just in case */ #define _REENTRANT 1 #if __solaris # define _POSIX_PTHREAD_SEMANTICS 1 /* try to bribe solaris headers into providing a current pthread API * despite environment being configured for an older version. */ # define __EXTENSIONS__ 1 #endif #include #include #include #include #include typedef pthread_mutex_t xmutex_t; #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) # define X_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP # define X_MUTEX_CREATE(mutex) \ do { \ pthread_mutexattr_t attr; \ pthread_mutexattr_init (&attr); \ pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_ADAPTIVE_NP); \ pthread_mutex_init (&(mutex), &attr); \ } while (0) #else # define X_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER # define X_MUTEX_CREATE(mutex) pthread_mutex_init (&(mutex), 0) #endif #define X_LOCK(mutex) pthread_mutex_lock (&(mutex)) #define X_UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) typedef pthread_cond_t xcond_t; #define X_COND_INIT PTHREAD_COND_INITIALIZER #define X_COND_CREATE(cond) pthread_cond_init (&(cond), 0) #define X_COND_SIGNAL(cond) pthread_cond_signal (&(cond)) #define X_COND_WAIT(cond,mutex) pthread_cond_wait (&(cond), &(mutex)) #define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to)) typedef pthread_t xthread_t; #define X_THREAD_PROC(name) static void *name (void *thr_arg) #define X_THREAD_ATFORK(prepare,parent,child) pthread_atfork (prepare, parent, child) // the broken bsd's once more #ifndef PTHREAD_STACK_MIN # define PTHREAD_STACK_MIN 0 #endif #ifndef X_STACKSIZE # define X_STACKSIZE sizeof (void *) * 4096 #endif static int xthread_create (xthread_t *tid, void *(*proc)(void *), void *arg) { int retval; sigset_t fullsigset, oldsigset; pthread_attr_t attr; pthread_attr_init (&attr); pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); if (X_STACKSIZE != 0) pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < X_STACKSIZE ? X_STACKSIZE : PTHREAD_STACK_MIN); #ifdef PTHREAD_SCOPE_PROCESS pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); #endif sigfillset (&fullsigset); pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset); retval = pthread_create (tid, &attr, proc, arg) == 0; pthread_sigmask (SIG_SETMASK, &oldsigset, 0); pthread_attr_destroy (&attr); return retval; } #define respipe_read(a,b,c) read ((a), (b), (c)) #define respipe_write(a,b,c) write ((a), (b), (c)) #define respipe_close(a) close ((a)) #endif #if __linux && __GNUC__ >= 4 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 3 && 0 /* also check arch */ /* __thread has little to no advantage over pthread_* in most configurations, so this is not used */ # define X_TLS_DECLARE(varname) __thread void *varname # define X_TLS_INIT(varname) # define X_TLS_SET(varname,value) varname = (value) # define X_TLS_GET(varname) varname #else # define X_TLS_DECLARE(varname) pthread_key_t varname # define X_TLS_INIT(varname) do { if (pthread_key_create (&(varname), 0)) abort (); } while (0) # define X_TLS_SET(varname,value) pthread_setspecific (varname, (value)) # define X_TLS_GET(varname) pthread_getspecific (varname) #endif #endif tarantool_1.6.7.588.g76bbd9c/third_party/libeio/eio.h0000664000000000000000000003772312634006617020705 0ustar rootroot/* * libeio API header * * Copyright (c) 2007,2008,2009,2010,2011,2012,2015 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef EIO_H_ #define EIO_H_ #ifdef __cplusplus extern "C" { #endif #include #include #include typedef struct eio_req eio_req; typedef struct eio_dirent eio_dirent; typedef int (*eio_cb)(eio_req *req); #ifndef EIO_REQ_MEMBERS # define EIO_REQ_MEMBERS #endif #ifndef EIO_STRUCT_STAT # ifdef _WIN32 # define EIO_STRUCT_STAT struct _stati64 # define EIO_STRUCT_STATI64 # else # define EIO_STRUCT_STAT struct stat # endif #endif #ifdef _WIN32 typedef int eio_uid_t; typedef int eio_gid_t; #ifdef __MINGW32__ /* no intptr_t */ typedef ssize_t eio_ssize_t; #else typedef intptr_t eio_ssize_t; /* or SSIZE_T */ #endif #if __GNUC__ typedef long long eio_ino_t; /* signed for compatibility to msvc */ #else typedef __int64 eio_ino_t; /* unsigned not supported by msvc */ #endif #else typedef uid_t eio_uid_t; typedef gid_t eio_gid_t; typedef ssize_t eio_ssize_t; typedef ino_t eio_ino_t; #endif #ifndef EIO_STRUCT_STATVFS # define EIO_STRUCT_STATVFS struct statvfs #endif /* managing working directories */ typedef struct eio_pwd *eio_wd; #define EIO_CWD 0 /* the current working directory of the process, guaranteed to be a null pointer */ #define EIO_INVALID_WD ((eio_wd)(int)-1) /* failure return for eio_wd_open */ eio_wd eio_wd_open_sync (eio_wd wd, const char *path); void eio_wd_close_sync (eio_wd wd); /* for readdir */ /* eio_readdir flags */ enum { EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ }; /* using "typical" values in the hope that the compiler will do something sensible */ enum eio_dtype { EIO_DT_UNKNOWN = 0, EIO_DT_FIFO = 1, EIO_DT_CHR = 2, EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */ EIO_DT_DIR = 4, EIO_DT_NAM = 5, /* xenix special named file */ EIO_DT_BLK = 6, EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */ EIO_DT_REG = 8, EIO_DT_NWK = 9, /* HP-UX network special */ EIO_DT_CMP = 9, /* VxFS compressed */ EIO_DT_LNK = 10, /* DT_SHAD = 11,*/ EIO_DT_SOCK = 12, EIO_DT_DOOR = 13, /* solaris door */ EIO_DT_WHT = 14, EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ }; struct eio_dirent { int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ unsigned short namelen; /* size of filename without trailing 0 */ unsigned char type; /* one of EIO_DT_* */ signed char score; /* internal use */ eio_ino_t inode; /* the inode number, if available, otherwise unspecified */ }; /* eio_msync flags */ enum { EIO_MS_ASYNC = 1, EIO_MS_INVALIDATE = 2, EIO_MS_SYNC = 4 }; /* eio_mtouch flags */ enum { EIO_MT_MODIFY = 1 }; /* eio_sync_file_range flags */ enum { EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, EIO_SYNC_FILE_RANGE_WRITE = 2, EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 }; /* eio_fallocate flags */ enum { /* these MUST match the value in linux/falloc.h */ EIO_FALLOC_FL_KEEP_SIZE = 0x01, EIO_FALLOC_FL_PUNCH_HOLE = 0x02, EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08, EIO_FALLOC_FL_ZERO_RANGE = 0x10 }; /* timestamps and differences - feel free to use double in your code directly */ typedef double eio_tstamp; /* the eio request structure */ enum { EIO_CUSTOM, EIO_WD_OPEN, EIO_WD_CLOSE, EIO_CLOSE, EIO_DUP2, EIO_SEEK, EIO_READ, EIO_WRITE, EIO_READAHEAD, EIO_SENDFILE, EIO_FSTAT, EIO_FSTATVFS, EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, EIO_MLOCK, EIO_MLOCKALL, EIO_GROUP, EIO_NOP, EIO_BUSY, /* these use wd + ptr1, but are emulated */ EIO_REALPATH, EIO_READDIR, /* all the following requests use wd + ptr1 as path in xxxat functions */ EIO_OPEN, EIO_STAT, EIO_LSTAT, EIO_STATVFS, EIO_TRUNCATE, EIO_UTIME, EIO_CHMOD, EIO_CHOWN, EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, EIO_MKNOD, EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REQ_TYPE_NUM }; /* seek whence modes */ /* these are guaranteed to hasve the traditional 0, 1, 2 values, */ /* so you might as wlel use those */ enum { EIO_SEEK_SET = 0, EIO_SEEK_CUR = 1, EIO_SEEK_END = 2 }; /* mlockall constants */ enum { EIO_MCL_CURRENT = 1, EIO_MCL_FUTURE = 2 }; /* request priorities */ enum { EIO_PRI_MIN = -4, EIO_PRI_MAX = 4, EIO_PRI_DEFAULT = 0 }; /* eio request structure */ /* this structure is mostly read-only */ /* when initialising it, all members must be zero-initialised */ struct eio_req { eio_req volatile *next; /* private ETP */ eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ eio_ssize_t result; /* result of syscall, e.g. result = read (... */ off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ eio_tstamp nv2; /* utime, futime: mtime */ int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, sync_file_range, fallocate: flags */ long int3; /* chown, fchown: gid; rename, link: working directory of new name */ int errorno; /* errno value on syscall return */ unsigned char flags; /* private */ signed char type;/* EIO_xxx constant ETP */ signed char pri; /* the priority ETP */ #if __i386 || __amd64 unsigned char cancelled; /* ETP */ #else sig_atomic_t cancelled; /* ETP */ #endif void *data; eio_cb finish; void (*destroy)(eio_req *req); /* called when request no longer needed */ void (*feed)(eio_req *req); /* only used for group requests */ EIO_REQ_MEMBERS eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */ }; /* _private_ request flags */ enum { EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ }; /* undocumented/unsupported/private helper */ /*void eio_page_align (void **addr, size_t *length);*/ /* returns < 0 on error, errno set * need_poll, if non-zero, will be called when results are available * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). * done_poll is called when the need to poll is gone. */ int eio_init (void (*want_poll)(void), void (*done_poll)(void)); /* must be called regularly to handle pending requests */ /* returns 0 if all requests were handled, -1 if not, or the value of EIO_FINISH if != 0 */ int eio_poll (void); /* stop polling if poll took longer than duration seconds */ void eio_set_max_poll_time (eio_tstamp nseconds); /* do not handle more then count requests in one call to eio_poll_cb */ void eio_set_max_poll_reqs (unsigned int nreqs); /* set minimum required number * maximum wanted number * or maximum idle number of threads */ void eio_set_min_parallel (unsigned int nthreads); void eio_set_max_parallel (unsigned int nthreads); void eio_set_max_idle (unsigned int nthreads); void eio_set_idle_timeout (unsigned int seconds); unsigned int eio_nreqs (void); /* number of requests in-flight */ unsigned int eio_nready (void); /* number of not-yet handled requests */ unsigned int eio_npending (void); /* number of finished but unhandled requests */ unsigned int eio_nthreads (void); /* number of worker threads in use currently */ /*****************************************************************************/ /* convenience wrappers */ #ifndef EIO_NO_WRAPPERS eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ eio_req *eio_sync (int pri, eio_cb cb, void *data); eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data); eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data); eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data); eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data); eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data); eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data); eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data); #endif /*****************************************************************************/ /* groups */ eio_req *eio_grp (eio_cb cb, void *data); void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); void eio_grp_limit (eio_req *grp, int limit); void eio_grp_add (eio_req *grp, eio_req *req); void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ /*****************************************************************************/ /* request api */ /* true if the request was cancelled, useful in the invoke callback */ #define EIO_CANCELLED(req) ((req)->cancelled) #define EIO_RESULT(req) ((req)->result) /* returns a pointer to the result buffer allocated by eio */ #define EIO_BUF(req) ((req)->ptr2) #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) #define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req)) #define EIO_PATH(req) ((char *)(req)->ptr1) /* submit a request for execution */ void eio_submit (eio_req *req); /* cancel a request as soon fast as possible, if possible */ void eio_cancel (eio_req *req); /*****************************************************************************/ /* convenience functions */ eio_ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); #ifdef __cplusplus } #endif #endif tarantool_1.6.7.588.g76bbd9c/third_party/libeio/install-sh0000775000000000000000000003325512634006617021760 0ustar rootroot#!/bin/sh # install - install a program, script, or datafile scriptversion=2011-11-20.07; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # 'make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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In this case, the final cleanup might fail but the new # file should still install successfully. { test ! -f "$dst" || $doit $rmcmd -f "$dst" 2>/dev/null || { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null && { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; } } || { echo "$0: cannot unlink or rename $dst" >&2 (exit 1); exit 1 } } && # Now rename the file to the real destination. $doit $mvcmd "$dsttmp" "$dst" } fi || exit 1 trap '' 0 fi done # Local variables: # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: tarantool_1.6.7.588.g76bbd9c/third_party/libev/0000775000000000000000000000000012634006617017602 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/libev/ev_port.c0000664000000000000000000001440412634006617021427 0ustar rootroot/* * libev solaris event port backend * * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* useful reading: * * http://bugs.opensolaris.org/view_bug.do?bug_id=6268715 (random results) * http://bugs.opensolaris.org/view_bug.do?bug_id=6455223 (just totally broken) * http://bugs.opensolaris.org/view_bug.do?bug_id=6873782 (manpage ETIME) * http://bugs.opensolaris.org/view_bug.do?bug_id=6874410 (implementation ETIME) * http://www.mail-archive.com/networking-discuss@opensolaris.org/msg11898.html ETIME vs. nget * http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/event_port.c (libc) * http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/portfs/port.c#1325 (kernel) */ #include #include #include #include #include #include void inline_speed port_associate_and_check (EV_P_ int fd, int ev) { if (0 > port_associate ( backend_fd, PORT_SOURCE_FD, fd, (ev & EV_READ ? POLLIN : 0) | (ev & EV_WRITE ? POLLOUT : 0), 0 ) ) { if (errno == EBADFD) fd_kill (EV_A_ fd); else ev_syserr ("(libev) port_associate"); } } static void port_modify (EV_P_ int fd, int oev, int nev) { /* we need to reassociate no matter what, as closes are * once more silently being discarded. */ if (!nev) { if (oev) port_dissociate (backend_fd, PORT_SOURCE_FD, fd); } else port_associate_and_check (EV_A_ fd, nev); } static void port_poll (EV_P_ ev_tstamp timeout) { int res, i; struct timespec ts; uint_t nget = 1; /* we initialise this to something we will skip in the loop, as */ /* port_getn can return with nget unchanged, but no indication */ /* whether it was the original value or has been updated :/ */ port_events [0].portev_source = 0; EV_RELEASE_CB; EV_TS_SET (ts, timeout); res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); EV_ACQUIRE_CB; /* port_getn may or may not set nget on error */ /* so we rely on port_events [0].portev_source not being updated */ if (res == -1 && errno != ETIME && errno != EINTR) ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)"); for (i = 0; i < nget; ++i) { if (port_events [i].portev_source == PORT_SOURCE_FD) { int fd = port_events [i].portev_object; fd_event ( EV_A_ fd, (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) ); fd_change (EV_A_ fd, EV__IOFDSET); } } if (expect_false (nget == port_eventmax)) { ev_free (port_events); port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1); port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); } } int inline_size port_init (EV_P_ int flags) { /* Initialize the kernel queue */ if ((backend_fd = port_create ()) < 0) return 0; assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD)); fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ /* if my reading of the opensolaris kernel sources are correct, then * opensolaris does something very stupid: it checks if the time has already * elapsed and doesn't round up if that is the case,m otherwise it DOES round * up. Since we can't know what the case is, we need to guess by using a * "large enough" timeout. Normally, 1e-9 would be correct. */ backend_mintime = 1e-3; /* needed to compensate for port_getn returning early */ backend_modify = port_modify; backend_poll = port_poll; port_eventmax = 64; /* initial number of events receivable per poll */ port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); return EVBACKEND_PORT; } void inline_size port_destroy (EV_P) { ev_free (port_events); } void inline_size port_fork (EV_P) { close (backend_fd); while ((backend_fd = port_create ()) < 0) ev_syserr ("(libev) port"); fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* re-register interest in fds */ fd_rearm_all (EV_A); } tarantool_1.6.7.588.g76bbd9c/third_party/libev/missing0000775000000000000000000002403212634006617021202 0ustar rootroot#! /bin/sh # Common stub for a few missing GNU programs while installing. # Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc. # Originally by Fran,cois Pinard , 1996. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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Options: -h, --help display this help and exit -v, --version output version information and exit --run try to run the given command, and emulate it if it fails Supported PROGRAM values: aclocal touch file \`aclocal.m4' autoconf touch file \`configure' autoheader touch file \`config.h.in' automake touch all \`Makefile.in' files bison create \`y.tab.[ch]', if possible, from existing .[ch] flex create \`lex.yy.c', if possible, from existing .c help2man touch the output file lex create \`lex.yy.c', if possible, from existing .c makeinfo touch the output file tar try tar, gnutar, gtar, then tar without non-portable flags yacc create \`y.tab.[ch]', if possible, from existing .[ch]" ;; -v|--v|--ve|--ver|--vers|--versi|--versio|--version) echo "missing 0.4 - GNU automake" ;; -*) echo 1>&2 "$0: Unknown \`$1' option" echo 1>&2 "Try \`$0 --help' for more information" exit 1 ;; aclocal*) if test -z "$run" && ($1 --version) > /dev/null 2>&1; then # We have it, but it failed. exit 1 fi echo 1>&2 "\ WARNING: \`$1' is missing on your system. 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You may want to install GNU tar or Free paxutils, or check the command line arguments." exit 1 ;; *) echo 1>&2 "\ WARNING: \`$1' is needed, and you do not seem to have it handy on your system. You might have modified some files without having the proper tools for further handling them. Check the \`README' file, it often tells you about the needed prerequisites for installing this package. You may also peek at any GNU archive site, in case some other package would contain this missing \`$1' program." exit 1 ;; esac exit 0 tarantool_1.6.7.588.g76bbd9c/third_party/libev/event_compat.h0000664000000000000000000001643112634006617022444 0ustar rootroot/* * Copyright (c) 2000-2004 Niels Provos * Copyright (c) 2008 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifdef __cplusplus extern "C" { #endif #ifdef _WIN32 # define WIN32_LEAN_AND_MEAN # include # undef WIN32_LEAN_AND_MEAN typedef unsigned char u_char; typedef unsigned short u_short; #else # include # include # include #endif #include /* Fix so that ppl dont have to run with */ #ifndef TAILQ_ENTRY #define _EVENT_DEFINED_TQENTRY #define TAILQ_ENTRY(type) \ struct { \ struct type *tqe_next; /* next element */ \ struct type **tqe_prev; /* address of previous next element */ \ } #endif /* !TAILQ_ENTRY */ #ifndef RB_ENTRY #define _EVENT_DEFINED_RBENTRY #define RB_ENTRY(type) \ struct { \ struct type *rbe_left; /* left element */ \ struct type *rbe_right; /* right element */ \ struct type *rbe_parent; /* parent element */ \ int rbe_color; /* node color */ \ } #endif /* !RB_ENTRY */ /* * Key-Value pairs. Can be used for HTTP headers but also for * query argument parsing. */ struct evkeyval { TAILQ_ENTRY(evkeyval) next; char *key; char *value; }; #ifdef _EVENT_DEFINED_TQENTRY #undef TAILQ_ENTRY struct event_list; struct evkeyvalq; #undef _EVENT_DEFINED_TQENTRY #else TAILQ_HEAD (event_list, event); TAILQ_HEAD (evkeyvalq, evkeyval); #endif /* _EVENT_DEFINED_TQENTRY */ #ifdef _EVENT_DEFINED_RBENTRY #undef RB_ENTRY #undef _EVENT_DEFINED_RBENTRY #endif /* _EVENT_DEFINED_RBENTRY */ struct eventop { char *name; void *(*init)(struct event_base *); int (*add)(void *, struct event *); int (*del)(void *, struct event *); int (*recalc)(struct event_base *, void *, int); int (*dispatch)(struct event_base *, void *, struct timeval *); void (*dealloc)(struct event_base *, void *); }; /* These functions deal with buffering input and output */ struct evbuffer { u_char *buffer; u_char *orig_buffer; size_t misalign; size_t totallen; size_t off; void (*cb)(struct evbuffer *, size_t, size_t, void *); void *cbarg; }; /* Just for error reporting - use other constants otherwise */ #define EVBUFFER_READ 0x01 #define EVBUFFER_WRITE 0x02 #define EVBUFFER_EOF 0x10 #define EVBUFFER_ERROR 0x20 #define EVBUFFER_TIMEOUT 0x40 struct bufferevent; typedef void (*evbuffercb)(struct bufferevent *, void *); typedef void (*everrorcb)(struct bufferevent *, short what, void *); struct event_watermark { size_t low; size_t high; }; struct bufferevent { struct event ev_read; struct event ev_write; struct evbuffer *input; struct evbuffer *output; struct event_watermark wm_read; struct event_watermark wm_write; evbuffercb readcb; evbuffercb writecb; everrorcb errorcb; void *cbarg; int timeout_read; /* in seconds */ int timeout_write; /* in seconds */ short enabled; /* events that are currently enabled */ }; struct bufferevent *bufferevent_new(int fd, evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg); int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev); int bufferevent_priority_set(struct bufferevent *bufev, int pri); void bufferevent_free(struct bufferevent *bufev); int bufferevent_write(struct bufferevent *bufev, const void *data, size_t size); int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf); size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size); int bufferevent_enable(struct bufferevent *bufev, short event); int bufferevent_disable(struct bufferevent *bufev, short event); void bufferevent_settimeout(struct bufferevent *bufev, int timeout_read, int timeout_write); #define EVBUFFER_LENGTH(x) (x)->off #define EVBUFFER_DATA(x) (x)->buffer #define EVBUFFER_INPUT(x) (x)->input #define EVBUFFER_OUTPUT(x) (x)->output struct evbuffer *evbuffer_new(void); void evbuffer_free(struct evbuffer *); int evbuffer_expand(struct evbuffer *, size_t); int evbuffer_add(struct evbuffer *, const void *, size_t); int evbuffer_remove(struct evbuffer *, void *, size_t); char *evbuffer_readline(struct evbuffer *); int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *); int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...); int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap); void evbuffer_drain(struct evbuffer *, size_t); int evbuffer_write(struct evbuffer *, int); int evbuffer_read(struct evbuffer *, int, int); u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t); void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *); /* * Marshaling tagged data - We assume that all tags are inserted in their * numeric order - so that unknown tags will always be higher than the * known ones - and we can just ignore the end of an event buffer. */ void evtag_init(void); void evtag_marshal(struct evbuffer *evbuf, uint32_t tag, const void *data, uint32_t len); void encode_int(struct evbuffer *evbuf, uint32_t number); void evtag_marshal_int(struct evbuffer *evbuf, uint32_t tag, uint32_t integer); void evtag_marshal_string(struct evbuffer *buf, uint32_t tag, const char *string); void evtag_marshal_timeval(struct evbuffer *evbuf, uint32_t tag, struct timeval *tv); int evtag_unmarshal(struct evbuffer *src, uint32_t *ptag, struct evbuffer *dst); int evtag_peek(struct evbuffer *evbuf, uint32_t *ptag); int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength); int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength); int evtag_consume(struct evbuffer *evbuf); int evtag_unmarshal_int(struct evbuffer *evbuf, uint32_t need_tag, uint32_t *pinteger); int evtag_unmarshal_fixed(struct evbuffer *src, uint32_t need_tag, void *data, size_t len); int evtag_unmarshal_string(struct evbuffer *evbuf, uint32_t need_tag, char **pstring); int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint32_t need_tag, struct timeval *ptv); #ifdef __cplusplus } #endif tarantool_1.6.7.588.g76bbd9c/third_party/libev/ev.c0000664000000000000000000036574612634006617020405 0ustar rootroot/* * libev event processing core, watcher management * * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* this big block deduces configuration from config.h */ #ifndef EV_STANDALONE # ifdef EV_CONFIG_H # include EV_CONFIG_H # else # include "config.h" # endif # if HAVE_FLOOR # ifndef EV_USE_FLOOR # define EV_USE_FLOOR 1 # endif # endif # if HAVE_CLOCK_SYSCALL # ifndef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 1 # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # endif # endif # elif !defined EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 # endif # if HAVE_CLOCK_GETTIME # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # else # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # endif # if HAVE_NANOSLEEP # ifndef EV_USE_NANOSLEEP # define EV_USE_NANOSLEEP EV_FEATURE_OS # endif # else # undef EV_USE_NANOSLEEP # define EV_USE_NANOSLEEP 0 # endif # if HAVE_SELECT && HAVE_SYS_SELECT_H # ifndef EV_USE_SELECT # define EV_USE_SELECT EV_FEATURE_BACKENDS # endif # else # undef EV_USE_SELECT # define EV_USE_SELECT 0 # endif # if HAVE_POLL && HAVE_POLL_H # ifndef EV_USE_POLL # define EV_USE_POLL EV_FEATURE_BACKENDS # endif # else # undef EV_USE_POLL # define EV_USE_POLL 0 # endif # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H # ifndef EV_USE_EPOLL # define EV_USE_EPOLL EV_FEATURE_BACKENDS # endif # else # undef EV_USE_EPOLL # define EV_USE_EPOLL 0 # endif # if HAVE_KQUEUE && HAVE_SYS_EVENT_H # ifndef EV_USE_KQUEUE # define EV_USE_KQUEUE EV_FEATURE_BACKENDS # endif # else # undef EV_USE_KQUEUE # define EV_USE_KQUEUE 0 # endif # if HAVE_PORT_H && HAVE_PORT_CREATE # ifndef EV_USE_PORT # define EV_USE_PORT EV_FEATURE_BACKENDS # endif # else # undef EV_USE_PORT # define EV_USE_PORT 0 # endif # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H # ifndef EV_USE_INOTIFY # define EV_USE_INOTIFY EV_FEATURE_OS # endif # else # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 # endif # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H # ifndef EV_USE_SIGNALFD # define EV_USE_SIGNALFD EV_FEATURE_OS # endif # else # undef EV_USE_SIGNALFD # define EV_USE_SIGNALFD 0 # endif # if HAVE_EVENTFD # ifndef EV_USE_EVENTFD # define EV_USE_EVENTFD EV_FEATURE_OS # endif # else # undef EV_USE_EVENTFD # define EV_USE_EVENTFD 0 # endif #endif #include #include #include #include #include #include #include #include #include #include #include #ifdef EV_H # include EV_H #else # include "ev.h" #endif #if EV_NO_THREADS # undef EV_NO_SMP # define EV_NO_SMP 1 # undef ECB_NO_THREADS # define ECB_NO_THREADS 1 #endif #if EV_NO_SMP # undef EV_NO_SMP # define ECB_NO_SMP 1 #endif #ifndef _WIN32 # include # include # include #else # include # define WIN32_LEAN_AND_MEAN # include # include # ifndef EV_SELECT_IS_WINSOCKET # define EV_SELECT_IS_WINSOCKET 1 # endif # undef EV_AVOID_STDIO #endif /* OS X, in its infinite idiocy, actually HARDCODES * a limit of 1024 into their select. Where people have brains, * OS X engineers apparently have a vacuum. Or maybe they were * ordered to have a vacuum, or they do anything for money. * This might help. Or not. */ #define _DARWIN_UNLIMITED_SELECT 1 /* this block tries to deduce configuration from header-defined symbols and defaults */ /* try to deduce the maximum number of signals on this platform */ #if defined EV_NSIG /* use what's provided */ #elif defined NSIG # define EV_NSIG (NSIG) #elif defined _NSIG # define EV_NSIG (_NSIG) #elif defined SIGMAX # define EV_NSIG (SIGMAX+1) #elif defined SIG_MAX # define EV_NSIG (SIG_MAX+1) #elif defined _SIG_MAX # define EV_NSIG (_SIG_MAX+1) #elif defined MAXSIG # define EV_NSIG (MAXSIG+1) #elif defined MAX_SIG # define EV_NSIG (MAX_SIG+1) #elif defined SIGARRAYSIZE # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ #elif defined _sys_nsig # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ #else # define EV_NSIG (8 * sizeof (sigset_t) + 1) #endif #ifndef EV_USE_FLOOR # define EV_USE_FLOOR 0 #endif #ifndef EV_USE_CLOCK_SYSCALL # if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS # else # define EV_USE_CLOCK_SYSCALL 0 # endif #endif #if !(_POSIX_TIMERS > 0) # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif #endif #ifndef EV_USE_MONOTONIC # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 # define EV_USE_MONOTONIC EV_FEATURE_OS # else # define EV_USE_MONOTONIC 0 # endif #endif #ifndef EV_USE_REALTIME # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL #endif #ifndef EV_USE_NANOSLEEP # if _POSIX_C_SOURCE >= 199309L # define EV_USE_NANOSLEEP EV_FEATURE_OS # else # define EV_USE_NANOSLEEP 0 # endif #endif #ifndef EV_USE_SELECT # define EV_USE_SELECT EV_FEATURE_BACKENDS #endif #ifndef EV_USE_POLL # ifdef _WIN32 # define EV_USE_POLL 0 # else # define EV_USE_POLL EV_FEATURE_BACKENDS # endif #endif #ifndef EV_USE_EPOLL # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) # define EV_USE_EPOLL EV_FEATURE_BACKENDS # else # define EV_USE_EPOLL 0 # endif #endif #ifndef EV_USE_KQUEUE # define EV_USE_KQUEUE 0 #endif #ifndef EV_USE_PORT # define EV_USE_PORT 0 #endif #ifndef EV_USE_INOTIFY # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) # define EV_USE_INOTIFY EV_FEATURE_OS # else # define EV_USE_INOTIFY 0 # endif #endif #ifndef EV_PID_HASHSIZE # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 #endif #ifndef EV_INOTIFY_HASHSIZE # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 #endif #ifndef EV_USE_EVENTFD # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) # define EV_USE_EVENTFD EV_FEATURE_OS # else # define EV_USE_EVENTFD 0 # endif #endif #ifndef EV_USE_SIGNALFD # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) # define EV_USE_SIGNALFD EV_FEATURE_OS # else # define EV_USE_SIGNALFD 0 # endif #endif #if 0 /* debugging */ # define EV_VERIFY 3 # define EV_USE_4HEAP 1 # define EV_HEAP_CACHE_AT 1 #endif #ifndef EV_VERIFY # define EV_VERIFY (EV_FEATURE_API ? 1 : 0) #endif #ifndef EV_USE_4HEAP # define EV_USE_4HEAP EV_FEATURE_DATA #endif #ifndef EV_HEAP_CACHE_AT # define EV_HEAP_CACHE_AT EV_FEATURE_DATA #endif #ifdef ANDROID /* supposedly, android doesn't typedef fd_mask */ # undef EV_USE_SELECT # define EV_USE_SELECT 0 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */ # undef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 #endif /* aix's poll.h seems to cause lots of trouble */ #ifdef _AIX /* AIX has a completely broken poll.h header */ # undef EV_USE_POLL # define EV_USE_POLL 0 #endif /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ /* which makes programs even slower. might work on other unices, too. */ #if EV_USE_CLOCK_SYSCALL # include # ifdef SYS_clock_gettime # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) # undef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # else # undef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 # endif #endif /* this block fixes any misconfiguration where we know we run into trouble otherwise */ #ifndef CLOCK_MONOTONIC # undef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 #endif #ifndef CLOCK_REALTIME # undef EV_USE_REALTIME # define EV_USE_REALTIME 0 #endif #if !EV_STAT_ENABLE # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 #endif #if !EV_USE_NANOSLEEP /* hp-ux has it in sys/time.h, which we unconditionally include above */ # if !defined _WIN32 && !defined __hpux # include # endif #endif #if EV_USE_INOTIFY # include # include /* some very old inotify.h headers don't have IN_DONT_FOLLOW */ # ifndef IN_DONT_FOLLOW # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 # endif #endif #if EV_USE_EVENTFD /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ # include # ifndef EFD_NONBLOCK # define EFD_NONBLOCK O_NONBLOCK # endif # ifndef EFD_CLOEXEC # ifdef O_CLOEXEC # define EFD_CLOEXEC O_CLOEXEC # else # define EFD_CLOEXEC 02000000 # endif # endif EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); #endif #if EV_USE_SIGNALFD /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ # include # ifndef SFD_NONBLOCK # define SFD_NONBLOCK O_NONBLOCK # endif # ifndef SFD_CLOEXEC # ifdef O_CLOEXEC # define SFD_CLOEXEC O_CLOEXEC # else # define SFD_CLOEXEC 02000000 # endif # endif EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); struct signalfd_siginfo { uint32_t ssi_signo; char pad[128 - sizeof (uint32_t)]; }; #endif /**/ #if EV_VERIFY >= 3 # define EV_FREQUENT_CHECK ev_verify (EV_A) #else # define EV_FREQUENT_CHECK do { } while (0) #endif /* * This is used to work around floating point rounding problems. * This value is good at least till the year 4000. */ #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ /* ECB.H BEGIN */ /* * libecb - http://software.schmorp.de/pkg/libecb * * Copyright (©) 2009-2015 Marc Alexander Lehmann * Copyright (©) 2011 Emanuele Giaquinta * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef ECB_H #define ECB_H /* 16 bits major, 16 bits minor */ #define ECB_VERSION 0x00010004 #ifdef _WIN32 typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed short int16_t; typedef unsigned short uint16_t; typedef signed int int32_t; typedef unsigned int uint32_t; #if __GNUC__ typedef signed long long int64_t; typedef unsigned long long uint64_t; #else /* _MSC_VER || __BORLANDC__ */ typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; #endif #ifdef _WIN64 #define ECB_PTRSIZE 8 typedef uint64_t uintptr_t; typedef int64_t intptr_t; #else #define ECB_PTRSIZE 4 typedef uint32_t uintptr_t; typedef int32_t intptr_t; #endif #else #include #if UINTMAX_MAX > 0xffffffffU #define ECB_PTRSIZE 8 #else #define ECB_PTRSIZE 4 #endif #endif #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) /* work around x32 idiocy by defining proper macros */ #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 #if _ILP32 #define ECB_AMD64_X32 1 #else #define ECB_AMD64 1 #endif #endif /* many compilers define _GNUC_ to some versions but then only implement * what their idiot authors think are the "more important" extensions, * causing enormous grief in return for some better fake benchmark numbers. * or so. * we try to detect these and simply assume they are not gcc - if they have * an issue with that they should have done it right in the first place. */ #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ #define ECB_GCC_VERSION(major,minor) 0 #else #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) #endif #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) #if __clang__ && defined __has_builtin #define ECB_CLANG_BUILTIN(x) __has_builtin (x) #else #define ECB_CLANG_BUILTIN(x) 0 #endif #if __clang__ && defined __has_extension #define ECB_CLANG_EXTENSION(x) __has_extension (x) #else #define ECB_CLANG_EXTENSION(x) 0 #endif #define ECB_CPP (__cplusplus+0) #define ECB_CPP11 (__cplusplus >= 201103L) #if ECB_CPP #define ECB_C 0 #define ECB_STDC_VERSION 0 #else #define ECB_C 1 #define ECB_STDC_VERSION __STDC_VERSION__ #endif #define ECB_C99 (ECB_STDC_VERSION >= 199901L) #define ECB_C11 (ECB_STDC_VERSION >= 201112L) #if ECB_CPP #define ECB_EXTERN_C extern "C" #define ECB_EXTERN_C_BEG ECB_EXTERN_C { #define ECB_EXTERN_C_END } #else #define ECB_EXTERN_C extern #define ECB_EXTERN_C_BEG #define ECB_EXTERN_C_END #endif /*****************************************************************************/ /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ #if ECB_NO_THREADS #define ECB_NO_SMP 1 #endif #if ECB_NO_SMP #define ECB_MEMORY_FENCE do { } while (0) #endif /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ #if __xlC__ && ECB_CPP #include #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #if __i386 || __i386__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif ECB_GCC_AMD64 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") #elif __aarch64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") #elif defined __alpha__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") #elif defined __hppa__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif defined __ia64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") #elif defined __m68k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #elif defined __m88k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") #elif defined __sh__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #endif #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(4,7) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) #elif ECB_CLANG_EXTENSION(c_atomic) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () #elif _MSC_VER >= 1500 /* VC++ 2008 */ /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() #elif _MSC_VER >= 1400 /* VC++ 2005 */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier () #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () #elif defined _WIN32 #include #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #include #define ECB_MEMORY_FENCE __machine_rw_barrier () #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () #elif __xlC__ #define ECB_MEMORY_FENCE __sync () #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_C11 && !defined __STDC_NO_ATOMICS__ /* we assume that these memory fences work on all variables/all memory accesses, */ /* not just C11 atomics and atomic accesses */ #include /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ /* any fence other than seq_cst, which isn't very efficient for us. */ /* Why that is, we don't know - either the C11 memory model is quite useless */ /* for most usages, or gcc and clang have a bug */ /* I *currently* lean towards the latter, and inefficiently implement */ /* all three of ecb's fences as a seq_cst fence */ /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ /* for all __atomic_thread_fence's except seq_cst */ #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) #endif #endif #ifndef ECB_MEMORY_FENCE #if !ECB_AVOID_PTHREADS /* * if you get undefined symbol references to pthread_mutex_lock, * or failure to find pthread.h, then you should implement * the ECB_MEMORY_FENCE operations for your cpu/compiler * OR provide pthread.h and link against the posix thread library * of your system. */ #include #define ECB_NEEDS_PTHREADS 1 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) #endif #endif #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE #endif #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE #endif /*****************************************************************************/ #if ECB_CPP #define ecb_inline static inline #elif ECB_GCC_VERSION(2,5) #define ecb_inline static __inline__ #elif ECB_C99 #define ecb_inline static inline #else #define ecb_inline static #endif #if ECB_GCC_VERSION(3,3) #define ecb_restrict __restrict__ #elif ECB_C99 #define ecb_restrict restrict #else #define ecb_restrict #endif typedef int ecb_bool; #define ECB_CONCAT_(a, b) a ## b #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) #define ECB_STRINGIFY_(a) # a #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) #define ecb_function_ ecb_inline #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) #define ecb_attribute(attrlist) __attribute__ (attrlist) #else #define ecb_attribute(attrlist) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) #define ecb_is_constant(expr) __builtin_constant_p (expr) #else /* possible C11 impl for integral types typedef struct ecb_is_constant_struct ecb_is_constant_struct; #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ #define ecb_is_constant(expr) 0 #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) #else #define ecb_expect(expr,value) (expr) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) #else #define ecb_prefetch(addr,rw,locality) #endif /* no emulation for ecb_decltype */ #if ECB_CPP11 // older implementations might have problems with decltype(x)::type, work around it template struct ecb_decltype_t { typedef T type; }; #define ecb_decltype(x) ecb_decltype_t::type #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) #define ecb_decltype(x) __typeof__ (x) #endif #if _MSC_VER >= 1300 #define ecb_deprecated __declspec (deprecated) #else #define ecb_deprecated ecb_attribute ((__deprecated__)) #endif #if _MSC_VER >= 1500 #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) #elif ECB_GCC_VERSION(4,5) #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) #else #define ecb_deprecated_message(msg) ecb_deprecated #endif #if _MSC_VER >= 1400 #define ecb_noinline __declspec (noinline) #else #define ecb_noinline ecb_attribute ((__noinline__)) #endif #define ecb_unused ecb_attribute ((__unused__)) #define ecb_const ecb_attribute ((__const__)) #define ecb_pure ecb_attribute ((__pure__)) #if ECB_C11 || __IBMC_NORETURN /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ #define ecb_noreturn _Noreturn #elif ECB_CPP11 #define ecb_noreturn [[noreturn]] #elif _MSC_VER >= 1200 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ #define ecb_noreturn __declspec (noreturn) #else #define ecb_noreturn ecb_attribute ((__noreturn__)) #endif #if ECB_GCC_VERSION(4,3) #define ecb_artificial ecb_attribute ((__artificial__)) #define ecb_hot ecb_attribute ((__hot__)) #define ecb_cold ecb_attribute ((__cold__)) #else #define ecb_artificial #define ecb_hot #define ecb_cold #endif /* put around conditional expressions if you are very sure that the */ /* expression is mostly true or mostly false. note that these return */ /* booleans, not the expression. */ #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) /* for compatibility to the rest of the world */ #define ecb_likely(expr) ecb_expect_true (expr) #define ecb_unlikely(expr) ecb_expect_false (expr) /* count trailing zero bits and count # of one bits */ #if ECB_GCC_VERSION(3,4) \ || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ && ECB_CLANG_BUILTIN(__builtin_popcount)) /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ #define ecb_ld32(x) (__builtin_clz (x) ^ 31) #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) #define ecb_ctz32(x) __builtin_ctz (x) #define ecb_ctz64(x) __builtin_ctzll (x) #define ecb_popcount32(x) __builtin_popcount (x) /* no popcountll */ #else ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); ecb_function_ ecb_const int ecb_ctz32 (uint32_t x) { int r = 0; x &= ~x + 1; /* this isolates the lowest bit */ #if ECB_branchless_on_i386 r += !!(x & 0xaaaaaaaa) << 0; r += !!(x & 0xcccccccc) << 1; r += !!(x & 0xf0f0f0f0) << 2; r += !!(x & 0xff00ff00) << 3; r += !!(x & 0xffff0000) << 4; #else if (x & 0xaaaaaaaa) r += 1; if (x & 0xcccccccc) r += 2; if (x & 0xf0f0f0f0) r += 4; if (x & 0xff00ff00) r += 8; if (x & 0xffff0000) r += 16; #endif return r; } ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); ecb_function_ ecb_const int ecb_ctz64 (uint64_t x) { int shift = x & 0xffffffffU ? 0 : 32; return ecb_ctz32 (x >> shift) + shift; } ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); ecb_function_ ecb_const int ecb_popcount32 (uint32_t x) { x -= (x >> 1) & 0x55555555; x = ((x >> 2) & 0x33333333) + (x & 0x33333333); x = ((x >> 4) + x) & 0x0f0f0f0f; x *= 0x01010101; return x >> 24; } ecb_function_ ecb_const int ecb_ld32 (uint32_t x); ecb_function_ ecb_const int ecb_ld32 (uint32_t x) { int r = 0; if (x >> 16) { x >>= 16; r += 16; } if (x >> 8) { x >>= 8; r += 8; } if (x >> 4) { x >>= 4; r += 4; } if (x >> 2) { x >>= 2; r += 2; } if (x >> 1) { r += 1; } return r; } ecb_function_ ecb_const int ecb_ld64 (uint64_t x); ecb_function_ ecb_const int ecb_ld64 (uint64_t x) { int r = 0; if (x >> 32) { x >>= 32; r += 32; } return r + ecb_ld32 (x); } #endif ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) { return ( (x * 0x0802U & 0x22110U) | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; } ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) { x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); x = ( x >> 8 ) | ( x << 8); return x; } ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) { x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); x = ( x >> 16 ) | ( x << 16); return x; } /* popcount64 is only available on 64 bit cpus as gcc builtin */ /* so for this version we are lazy */ ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); ecb_function_ ecb_const int ecb_popcount64 (uint64_t x) { return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); } ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) #define ecb_bswap16(x) __builtin_bswap16 (x) #else #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) #endif #define ecb_bswap32(x) __builtin_bswap32 (x) #define ecb_bswap64(x) __builtin_bswap64 (x) #elif _MSC_VER #include #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) #else ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x) { return ecb_rotl16 (x, 8); } ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x) { return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); } ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x) { return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); } #endif #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) #define ecb_unreachable() __builtin_unreachable () #else /* this seems to work fine, but gcc always emits a warning for it :/ */ ecb_inline ecb_noreturn void ecb_unreachable (void); ecb_inline ecb_noreturn void ecb_unreachable (void) { } #endif /* try to tell the compiler that some condition is definitely true */ #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); ecb_inline ecb_const unsigned char ecb_byteorder_helper (void) { /* the union code still generates code under pressure in gcc, */ /* but less than using pointers, and always seems to */ /* successfully return a constant. */ /* the reason why we have this horrible preprocessor mess */ /* is to avoid it in all cases, at least on common architectures */ /* or when using a recent enough gcc version (>= 4.6) */ #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64 return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ return 0x44; #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ return 0x11; #else union { uint32_t i; uint8_t c; } u = { 0x11223344 }; return u.c; #endif } ecb_inline ecb_const ecb_bool ecb_big_endian (void); ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } ecb_inline ecb_const ecb_bool ecb_little_endian (void); ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } #if ECB_GCC_VERSION(3,0) || ECB_C99 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) #else #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) #endif #if ECB_CPP template static inline T ecb_div_rd (T val, T div) { return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; } template static inline T ecb_div_ru (T val, T div) { return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; } #else #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) #endif #if ecb_cplusplus_does_not_suck /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ template static inline int ecb_array_length (const T (&arr)[N]) { return N; } #else #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) #endif /*******************************************************************************/ /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ /* basically, everything uses "ieee pure-endian" floating point numbers */ /* the only noteworthy exception is ancient armle, which uses order 43218765 */ #if 0 \ || __i386 || __i386__ \ || ECB_GCC_AMD64 \ || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ || defined __s390__ || defined __s390x__ \ || defined __mips__ \ || defined __alpha__ \ || defined __hppa__ \ || defined __ia64__ \ || defined __m68k__ \ || defined __m88k__ \ || defined __sh__ \ || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ || defined __aarch64__ #define ECB_STDFP 1 #include /* for memcpy */ #else #define ECB_STDFP 0 #endif #ifndef ECB_NO_LIBM #include /* for frexp*, ldexp*, INFINITY, NAN */ /* only the oldest of old doesn't have this one. solaris. */ #ifdef INFINITY #define ECB_INFINITY INFINITY #else #define ECB_INFINITY HUGE_VAL #endif #ifdef NAN #define ECB_NAN NAN #else #define ECB_NAN ECB_INFINITY #endif #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L #define ecb_ldexpf(x,e) ldexpf ((x), (e)) #define ecb_frexpf(x,e) frexpf ((x), (e)) #else #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) #endif /* converts an ieee half/binary16 to a float */ ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x) { int e = (x >> 10) & 0x1f; int m = x & 0x3ff; float r; if (!e ) r = ecb_ldexpf (m , -24); else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); else if (m ) r = ECB_NAN; else r = ECB_INFINITY; return x & 0x8000 ? -r : r; } /* convert a float to ieee single/binary32 */ ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x) { uint32_t r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* slow emulation, works for anything but -0 */ uint32_t m; int e; if (x == 0e0f ) return 0x00000000U; if (x > +3.40282346638528860e+38f) return 0x7f800000U; if (x < -3.40282346638528860e+38f) return 0xff800000U; if (x != x ) return 0x7fbfffffU; m = ecb_frexpf (x, &e) * 0x1000000U; r = m & 0x80000000U; if (r) m = -m; if (e <= -126) { m &= 0xffffffU; m >>= (-125 - e); e = -126; } r |= (e + 126) << 23; r |= m & 0x7fffffU; #endif return r; } /* converts an ieee single/binary32 to a float */ ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x) { float r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 31; int e = (x >> 23) & 0xffU; x &= 0x7fffffU; if (e) x |= 0x800000U; else e = 1; /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); r = neg ? -r : r; #endif return r; } /* convert a double to ieee double/binary64 */ ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x) { uint64_t r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* slow emulation, works for anything but -0 */ uint64_t m; int e; if (x == 0e0 ) return 0x0000000000000000U; if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; if (x != x ) return 0X7ff7ffffffffffffU; m = frexp (x, &e) * 0x20000000000000U; r = m & 0x8000000000000000;; if (r) m = -m; if (e <= -1022) { m &= 0x1fffffffffffffU; m >>= (-1021 - e); e = -1022; } r |= ((uint64_t)(e + 1022)) << 52; r |= m & 0xfffffffffffffU; #endif return r; } /* converts an ieee double/binary64 to a double */ ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x) { double r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 63; int e = (x >> 52) & 0x7ffU; x &= 0xfffffffffffffU; if (e) x |= 0x10000000000000U; else e = 1; /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); r = neg ? -r : r; #endif return r; } #endif #endif /* ECB.H END */ #if ECB_MEMORY_FENCE_NEEDS_PTHREADS /* if your architecture doesn't need memory fences, e.g. because it is * single-cpu/core, or if you use libev in a project that doesn't use libev * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling * libev, in which cases the memory fences become nops. * alternatively, you can remove this #error and link against libpthread, * which will then provide the memory fences. */ # error "memory fences not defined for your architecture, please report" #endif #ifndef ECB_MEMORY_FENCE # define ECB_MEMORY_FENCE do { } while (0) # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE #endif #define expect_false(cond) ecb_expect_false (cond) #define expect_true(cond) ecb_expect_true (cond) #define noinline ecb_noinline #define inline_size ecb_inline #if EV_FEATURE_CODE # define inline_speed ecb_inline #else # define inline_speed static noinline #endif #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) #if EV_MINPRI == EV_MAXPRI # define ABSPRI(w) (((W)w), 0) #else # define ABSPRI(w) (((W)w)->priority - EV_MINPRI) #endif #define EMPTY /* required for microsofts broken pseudo-c compiler */ #define EMPTY2(a,b) /* used to suppress some warnings */ typedef ev_watcher *W; typedef ev_watcher_list *WL; typedef ev_watcher_time *WT; #define ev_active(w) ((W)(w))->active #define ev_at(w) ((WT)(w))->at #if EV_USE_REALTIME /* sig_atomic_t is used to avoid per-thread variables or locking but still */ /* giving it a reasonably high chance of working on typical architectures */ static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ #endif #if EV_USE_MONOTONIC static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ #endif #ifndef EV_FD_TO_WIN32_HANDLE # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) #endif #ifndef EV_WIN32_HANDLE_TO_FD # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) #endif #ifndef EV_WIN32_CLOSE_FD # define EV_WIN32_CLOSE_FD(fd) close (fd) #endif #ifdef _WIN32 # include "ev_win32.c" #endif /*****************************************************************************/ /* define a suitable floor function (only used by periodics atm) */ #if EV_USE_FLOOR # include # define ev_floor(v) floor (v) #else #include /* a floor() replacement function, should be independent of ev_tstamp type */ static ev_tstamp noinline ev_floor (ev_tstamp v) { /* the choice of shift factor is not terribly important */ #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; #else const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; #endif /* argument too large for an unsigned long? */ if (expect_false (v >= shift)) { ev_tstamp f; if (v == v - 1.) return v; /* very large number */ f = shift * ev_floor (v * (1. / shift)); return f + ev_floor (v - f); } /* special treatment for negative args? */ if (expect_false (v < 0.)) { ev_tstamp f = -ev_floor (-v); return f - (f == v ? 0 : 1); } /* fits into an unsigned long */ return (unsigned long)v; } #endif /*****************************************************************************/ #ifdef __linux # include #endif static unsigned int noinline ecb_cold ev_linux_version (void) { #ifdef __linux unsigned int v = 0; struct utsname buf; int i; char *p = buf.release; if (uname (&buf)) return 0; for (i = 3+1; --i; ) { unsigned int c = 0; for (;;) { if (*p >= '0' && *p <= '9') c = c * 10 + *p++ - '0'; else { p += *p == '.'; break; } } v = (v << 8) | c; } return v; #else return 0; #endif } /*****************************************************************************/ #if EV_AVOID_STDIO static void noinline ecb_cold ev_printerr (const char *msg) { write (STDERR_FILENO, msg, strlen (msg)); } #endif static void (*syserr_cb)(const char *msg) EV_THROW; void ecb_cold ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW { syserr_cb = cb; } static void noinline ecb_cold ev_syserr (const char *msg) { if (!msg) msg = "(libev) system error"; if (syserr_cb) syserr_cb (msg); else { #if EV_AVOID_STDIO ev_printerr (msg); ev_printerr (": "); ev_printerr (strerror (errno)); ev_printerr ("\n"); #else perror (msg); #endif abort (); } } static void * ev_realloc_emul (void *ptr, long size) EV_THROW { /* some systems, notably openbsd and darwin, fail to properly * implement realloc (x, 0) (as required by both ansi c-89 and * the single unix specification, so work around them here. * recently, also (at least) fedora and debian started breaking it, * despite documenting it otherwise. */ if (size) return realloc (ptr, size); free (ptr); return 0; } static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; void ecb_cold ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW { alloc = cb; } inline_speed void * ev_realloc (void *ptr, long size) { ptr = alloc (ptr, size); if (!ptr && size) { #if EV_AVOID_STDIO ev_printerr ("(libev) memory allocation failed, aborting.\n"); #else fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); #endif abort (); } return ptr; } #define ev_malloc(size) ev_realloc (0, (size)) #define ev_free(ptr) ev_realloc ((ptr), 0) /*****************************************************************************/ /* set in reify when reification needed */ #define EV_ANFD_REIFY 1 /* file descriptor info structure */ typedef struct { WL head; unsigned char events; /* the events watched for */ unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ unsigned char unused; #if EV_USE_EPOLL unsigned int egen; /* generation counter to counter epoll bugs */ #endif #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP SOCKET handle; #endif #if EV_USE_IOCP OVERLAPPED or, ow; #endif } ANFD; /* stores the pending event set for a given watcher */ typedef struct { W w; int events; /* the pending event set for the given watcher */ } ANPENDING; #if EV_USE_INOTIFY /* hash table entry per inotify-id */ typedef struct { WL head; } ANFS; #endif /* Heap Entry */ #if EV_HEAP_CACHE_AT /* a heap element */ typedef struct { ev_tstamp at; WT w; } ANHE; #define ANHE_w(he) (he).w /* access watcher, read-write */ #define ANHE_at(he) (he).at /* access cached at, read-only */ #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ #else /* a heap element */ typedef WT ANHE; #define ANHE_w(he) (he) #define ANHE_at(he) (he)->at #define ANHE_at_cache(he) #endif #if EV_MULTIPLICITY struct ev_loop { ev_tstamp ev_rt_now; #define ev_rt_now ((loop)->ev_rt_now) #define VAR(name,decl) decl; #include "ev_vars.h" #undef VAR }; #include "ev_wrap.h" static struct ev_loop default_loop_struct; EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ #else #ifdef EV_API_STATIC static ev_tstamp ev_rt_now = 0; #else ev_tstamp ev_rt_now = 0; #endif #define VAR(name,decl) static decl; #include "ev_vars.h" #undef VAR static int ev_default_loop_ptr; #endif #if EV_FEATURE_API # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) # define EV_INVOKE_PENDING invoke_cb (EV_A) #else # define EV_RELEASE_CB (void)0 # define EV_ACQUIRE_CB (void)0 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A) #endif #define EVBREAK_RECURSE 0x80 /*****************************************************************************/ #ifndef EV_HAVE_EV_TIME ev_tstamp ev_time (void) EV_THROW { #if EV_USE_REALTIME if (expect_true (have_realtime)) { struct timespec ts; clock_gettime (CLOCK_REALTIME, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; } #endif struct timeval tv; gettimeofday (&tv, 0); return tv.tv_sec + tv.tv_usec * 1e-6; } #endif inline_size ev_tstamp get_clock (void) { #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { struct timespec ts; clock_gettime (CLOCK_MONOTONIC, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; } #endif return ev_time (); } #if EV_MULTIPLICITY ev_tstamp ev_now (EV_P) EV_THROW { return ev_rt_now; } #endif void ev_sleep (ev_tstamp delay) EV_THROW { if (delay > 0.) { #if EV_USE_NANOSLEEP struct timespec ts; EV_TS_SET (ts, delay); nanosleep (&ts, 0); #elif defined _WIN32 Sleep ((unsigned long)(delay * 1e3)); #else struct timeval tv; /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ /* something not guaranteed by newer posix versions, but guaranteed */ /* by older ones */ EV_TV_SET (tv, delay); select (0, 0, 0, 0, &tv); #endif } } /*****************************************************************************/ #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ /* find a suitable new size for the given array, */ /* hopefully by rounding to a nice-to-malloc size */ inline_size int array_nextsize (int elem, int cur, int cnt) { int ncur = cur + 1; do ncur <<= 1; while (cnt > ncur); /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */ if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) { ncur *= elem; ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); ncur = ncur - sizeof (void *) * 4; ncur /= elem; } return ncur; } static void * noinline ecb_cold array_realloc (int elem, void *base, int *cur, int cnt) { *cur = array_nextsize (elem, *cur, cnt); return ev_realloc (base, elem * *cur); } #define array_init_zero(base,count) \ memset ((void *)(base), 0, sizeof (*(base)) * (count)) #define array_needsize(type,base,cur,cnt,init) \ if (expect_false ((cnt) > (cur))) \ { \ int ecb_unused ocur_ = (cur); \ (base) = (type *)array_realloc \ (sizeof (type), (base), &(cur), (cnt)); \ init ((base) + (ocur_), (cur) - ocur_); \ } #if 0 #define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ stem ## max = array_roundsize (stem ## cnt >> 1); \ base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ } #endif #define array_free(stem, idx) \ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 /*****************************************************************************/ /* dummy callback for pending events */ static void noinline pendingcb (EV_P_ ev_prepare *w, int revents) { } void noinline ev_feed_event (EV_P_ void *w, int revents) EV_THROW { W w_ = (W)w; int pri = ABSPRI (w_); if (expect_false (w_->pending)) pendings [pri][w_->pending - 1].events |= revents; else { w_->pending = ++pendingcnt [pri]; array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); pendings [pri][w_->pending - 1].w = w_; pendings [pri][w_->pending - 1].events = revents; } pendingpri = NUMPRI - 1; } inline_speed void feed_reverse (EV_P_ W w) { array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); rfeeds [rfeedcnt++] = w; } inline_size void feed_reverse_done (EV_P_ int revents) { do ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); while (rfeedcnt); } inline_speed void queue_events (EV_P_ W *events, int eventcnt, int type) { int i; for (i = 0; i < eventcnt; ++i) ev_feed_event (EV_A_ events [i], type); } /*****************************************************************************/ inline_speed void fd_event_nocheck (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; ev_io *w; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) { int ev = w->events & revents; if (ev) ev_feed_event (EV_A_ (W)w, ev); } } /* do not submit kernel events for fds that have reify set */ /* because that means they changed while we were polling for new events */ inline_speed void fd_event (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; if (expect_true (!anfd->reify)) fd_event_nocheck (EV_A_ fd, revents); } void ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW { if (fd >= 0 && fd < anfdmax) fd_event_nocheck (EV_A_ fd, revents); } /* make sure the external fd watch events are in-sync */ /* with the kernel/libev internal state */ inline_size void fd_reify (EV_P) { int i; #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP for (i = 0; i < fdchangecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; if (anfd->reify & EV__IOFDSET && anfd->head) { SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); if (handle != anfd->handle) { unsigned long arg; assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); /* handle changed, but fd didn't - we need to do it in two steps */ backend_modify (EV_A_ fd, anfd->events, 0); anfd->events = 0; anfd->handle = handle; } } } #endif for (i = 0; i < fdchangecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; ev_io *w; unsigned char o_events = anfd->events; unsigned char o_reify = anfd->reify; anfd->reify = 0; /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ { anfd->events = 0; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) anfd->events |= (unsigned char)w->events; if (o_events != anfd->events) o_reify = EV__IOFDSET; /* actually |= */ } if (o_reify & EV__IOFDSET) backend_modify (EV_A_ fd, o_events, anfd->events); } fdchangecnt = 0; } /* something about the given fd changed */ inline_size void fd_change (EV_P_ int fd, int flags) { unsigned char reify = anfds [fd].reify; anfds [fd].reify |= flags; if (expect_true (!reify)) { ++fdchangecnt; array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); fdchanges [fdchangecnt - 1] = fd; } } /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ inline_speed void ecb_cold fd_kill (EV_P_ int fd) { ev_io *w; while ((w = (ev_io *)anfds [fd].head)) { ev_io_stop (EV_A_ w); ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); } } /* check whether the given fd is actually valid, for error recovery */ inline_size int ecb_cold fd_valid (int fd) { #ifdef _WIN32 return EV_FD_TO_WIN32_HANDLE (fd) != -1; #else return fcntl (fd, F_GETFD) != -1; #endif } /* called on EBADF to verify fds */ static void noinline ecb_cold fd_ebadf (EV_P) { int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) if (!fd_valid (fd) && errno == EBADF) fd_kill (EV_A_ fd); } /* called on ENOMEM in select/poll to kill some fds and retry */ static void noinline ecb_cold fd_enomem (EV_P) { int fd; for (fd = anfdmax; fd--; ) if (anfds [fd].events) { fd_kill (EV_A_ fd); break; } } /* usually called after fork if backend needs to re-arm all fds from scratch */ static void noinline fd_rearm_all (EV_P) { int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) { anfds [fd].events = 0; anfds [fd].emask = 0; fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); } } /* used to prepare libev internal fd's */ /* this is not fork-safe */ inline_speed void fd_intern (int fd) { #ifdef _WIN32 unsigned long arg = 1; ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); #else fcntl (fd, F_SETFD, FD_CLOEXEC); fcntl (fd, F_SETFL, O_NONBLOCK); #endif } /*****************************************************************************/ /* * the heap functions want a real array index. array index 0 is guaranteed to not * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives * the branching factor of the d-tree. */ /* * at the moment we allow libev the luxury of two heaps, * a small-code-size 2-heap one and a ~1.5kb larger 4-heap * which is more cache-efficient. * the difference is about 5% with 50000+ watchers. */ #if EV_USE_4HEAP #define DHEAP 4 #define HEAP0 (DHEAP - 1) /* index of first element in heap */ #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) #define UPHEAP_DONE(p,k) ((p) == (k)) /* away from the root */ inline_speed void downheap (ANHE *heap, int N, int k) { ANHE he = heap [k]; ANHE *E = heap + N + HEAP0; for (;;) { ev_tstamp minat; ANHE *minpos; ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; /* find minimum child */ if (expect_true (pos + DHEAP - 1 < E)) { /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else if (pos < E) { /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else break; if (ANHE_at (he) <= minat) break; heap [k] = *minpos; ev_active (ANHE_w (*minpos)) = k; k = minpos - heap; } heap [k] = he; ev_active (ANHE_w (he)) = k; } #else /* 4HEAP */ #define HEAP0 1 #define HPARENT(k) ((k) >> 1) #define UPHEAP_DONE(p,k) (!(p)) /* away from the root */ inline_speed void downheap (ANHE *heap, int N, int k) { ANHE he = heap [k]; for (;;) { int c = k << 1; if (c >= N + HEAP0) break; c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) ? 1 : 0; if (ANHE_at (he) <= ANHE_at (heap [c])) break; heap [k] = heap [c]; ev_active (ANHE_w (heap [k])) = k; k = c; } heap [k] = he; ev_active (ANHE_w (he)) = k; } #endif /* towards the root */ inline_speed void upheap (ANHE *heap, int k) { ANHE he = heap [k]; for (;;) { int p = HPARENT (k); if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) break; heap [k] = heap [p]; ev_active (ANHE_w (heap [k])) = k; k = p; } heap [k] = he; ev_active (ANHE_w (he)) = k; } /* move an element suitably so it is in a correct place */ inline_size void adjustheap (ANHE *heap, int N, int k) { if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) upheap (heap, k); else downheap (heap, N, k); } /* rebuild the heap: this function is used only once and executed rarely */ inline_size void reheap (ANHE *heap, int N) { int i; /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ for (i = 0; i < N; ++i) upheap (heap, i + HEAP0); } /*****************************************************************************/ /* associate signal watchers to a signal signal */ typedef struct { EV_ATOMIC_T pending; #if EV_MULTIPLICITY EV_P; #endif WL head; } ANSIG; static ANSIG signals [EV_NSIG - 1]; /*****************************************************************************/ #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE static void noinline ecb_cold evpipe_init (EV_P) { if (!ev_is_active (&pipe_w)) { int fds [2]; # if EV_USE_EVENTFD fds [0] = -1; fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); if (fds [1] < 0 && errno == EINVAL) fds [1] = eventfd (0, 0); if (fds [1] < 0) # endif { while (pipe (fds)) ev_syserr ("(libev) error creating signal/async pipe"); fd_intern (fds [0]); } evpipe [0] = fds [0]; if (evpipe [1] < 0) evpipe [1] = fds [1]; /* first call, set write fd */ else { /* on subsequent calls, do not change evpipe [1] */ /* so that evpipe_write can always rely on its value. */ /* this branch does not do anything sensible on windows, */ /* so must not be executed on windows */ dup2 (fds [1], evpipe [1]); close (fds [1]); } fd_intern (evpipe [1]); ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); ev_io_start (EV_A_ &pipe_w); ev_unref (EV_A); /* watcher should not keep loop alive */ } } inline_speed void evpipe_write (EV_P_ EV_ATOMIC_T *flag) { ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */ if (expect_true (*flag)) return; *flag = 1; ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */ pipe_write_skipped = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */ if (pipe_write_wanted) { int old_errno; pipe_write_skipped = 0; ECB_MEMORY_FENCE_RELEASE; old_errno = errno; /* save errno because write will clobber it */ #if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter = 1; write (evpipe [1], &counter, sizeof (uint64_t)); } else #endif { #ifdef _WIN32 WSABUF buf; DWORD sent; buf.buf = &buf; buf.len = 1; WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0); #else write (evpipe [1], &(evpipe [1]), 1); #endif } errno = old_errno; } } /* called whenever the libev signal pipe */ /* got some events (signal, async) */ static void pipecb (EV_P_ ev_io *iow, int revents) { int i; if (revents & EV_READ) { #if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter; read (evpipe [1], &counter, sizeof (uint64_t)); } else #endif { char dummy[4]; #ifdef _WIN32 WSABUF buf; DWORD recvd; DWORD flags = 0; buf.buf = dummy; buf.len = sizeof (dummy); WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0); #else read (evpipe [0], &dummy, sizeof (dummy)); #endif } } pipe_write_skipped = 0; ECB_MEMORY_FENCE; /* push out skipped, acquire flags */ #if EV_SIGNAL_ENABLE if (sig_pending) { sig_pending = 0; ECB_MEMORY_FENCE; for (i = EV_NSIG - 1; i--; ) if (expect_false (signals [i].pending)) ev_feed_signal_event (EV_A_ i + 1); } #endif #if EV_ASYNC_ENABLE if (async_pending) { async_pending = 0; ECB_MEMORY_FENCE; for (i = asynccnt; i--; ) if (asyncs [i]->sent) { asyncs [i]->sent = 0; ECB_MEMORY_FENCE_RELEASE; ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); } } #endif } /*****************************************************************************/ void ev_feed_signal (int signum) EV_THROW { #if EV_MULTIPLICITY EV_P; ECB_MEMORY_FENCE_ACQUIRE; EV_A = signals [signum - 1].loop; if (!EV_A) return; #endif signals [signum - 1].pending = 1; evpipe_write (EV_A_ &sig_pending); } static void ev_sighandler (int signum) { #ifdef _WIN32 signal (signum, ev_sighandler); #endif ev_feed_signal (signum); } void noinline ev_feed_signal_event (EV_P_ int signum) EV_THROW { WL w; if (expect_false (signum <= 0 || signum >= EV_NSIG)) return; --signum; #if EV_MULTIPLICITY /* it is permissible to try to feed a signal to the wrong loop */ /* or, likely more useful, feeding a signal nobody is waiting for */ if (expect_false (signals [signum].loop != EV_A)) return; #endif signals [signum].pending = 0; ECB_MEMORY_FENCE_RELEASE; for (w = signals [signum].head; w; w = w->next) ev_feed_event (EV_A_ (W)w, EV_SIGNAL); } #if EV_USE_SIGNALFD static void sigfdcb (EV_P_ ev_io *iow, int revents) { struct signalfd_siginfo si[2], *sip; /* these structs are big */ for (;;) { ssize_t res = read (sigfd, si, sizeof (si)); /* not ISO-C, as res might be -1, but works with SuS */ for (sip = si; (char *)sip < (char *)si + res; ++sip) ev_feed_signal_event (EV_A_ sip->ssi_signo); if (res < (ssize_t)sizeof (si)) break; } } #endif #endif /*****************************************************************************/ #if EV_CHILD_ENABLE static WL childs [EV_PID_HASHSIZE]; static ev_signal childev; #ifndef WIFCONTINUED # define WIFCONTINUED(status) 0 #endif /* handle a single child status event */ inline_speed void child_reap (EV_P_ int chain, int pid, int status) { ev_child *w; int traced = WIFSTOPPED (status) || WIFCONTINUED (status); for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) { if ((w->pid == pid || !w->pid) && (!traced || (w->flags & 1))) { ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ w->rpid = pid; w->rstatus = status; ev_feed_event (EV_A_ (W)w, EV_CHILD); } } } #ifndef WCONTINUED # define WCONTINUED 0 #endif /* called on sigchld etc., calls waitpid */ static void childcb (EV_P_ ev_signal *sw, int revents) { int pid, status; /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) if (!WCONTINUED || errno != EINVAL || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) return; /* make sure we are called again until all children have been reaped */ /* we need to do it this way so that the callback gets called before we continue */ ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); child_reap (EV_A_ pid, pid, status); if ((EV_PID_HASHSIZE) > 1) child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ } #endif /*****************************************************************************/ #if EV_USE_IOCP # include "ev_iocp.c" #endif #if EV_USE_PORT # include "ev_port.c" #endif #if EV_USE_KQUEUE # include "ev_kqueue.c" #endif #if EV_USE_EPOLL # include "ev_epoll.c" #endif #if EV_USE_POLL # include "ev_poll.c" #endif #if EV_USE_SELECT # include "ev_select.c" #endif int ecb_cold ev_version_major (void) EV_THROW { return EV_VERSION_MAJOR; } int ecb_cold ev_version_minor (void) EV_THROW { return EV_VERSION_MINOR; } /* return true if we are running with elevated privileges and should ignore env variables */ int inline_size ecb_cold enable_secure (void) { #ifdef _WIN32 return 0; #else return getuid () != geteuid () || getgid () != getegid (); #endif } unsigned int ecb_cold ev_supported_backends (void) EV_THROW { unsigned int flags = 0; if (EV_USE_PORT ) flags |= EVBACKEND_PORT; if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; if (EV_USE_POLL ) flags |= EVBACKEND_POLL; if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; return flags; } unsigned int ecb_cold ev_recommended_backends (void) EV_THROW { unsigned int flags = ev_supported_backends (); #if !defined(__NetBSD__) && !defined(__FreeBSD__) /* kqueue is borked on everything but netbsd apparently */ /* it usually doesn't work correctly on anything but sockets and pipes */ flags &= ~EVBACKEND_KQUEUE; #endif #ifdef __APPLE__ /* only select works correctly on that "unix-certified" platform */ flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ #endif #ifdef __FreeBSD__ flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ #endif return flags; } unsigned int ecb_cold ev_embeddable_backends (void) EV_THROW { int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ flags &= ~EVBACKEND_EPOLL; return flags; } unsigned int ev_backend (EV_P) EV_THROW { return backend; } #if EV_FEATURE_API unsigned int ev_iteration (EV_P) EV_THROW { return loop_count; } unsigned int ev_depth (EV_P) EV_THROW { return loop_depth; } void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW { io_blocktime = interval; } void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW { timeout_blocktime = interval; } void ev_set_userdata (EV_P_ void *data) EV_THROW { userdata = data; } void * ev_userdata (EV_P) EV_THROW { return userdata; } void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW { invoke_cb = invoke_pending_cb; } void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW { release_cb = release; acquire_cb = acquire; } #endif /* initialise a loop structure, must be zero-initialised */ static void noinline ecb_cold loop_init (EV_P_ unsigned int flags) EV_THROW { if (!backend) { origflags = flags; #if EV_USE_REALTIME if (!have_realtime) { struct timespec ts; if (!clock_gettime (CLOCK_REALTIME, &ts)) have_realtime = 1; } #endif #if EV_USE_MONOTONIC if (!have_monotonic) { struct timespec ts; if (!clock_gettime (CLOCK_MONOTONIC, &ts)) have_monotonic = 1; } #endif /* pid check not overridable via env */ #ifndef _WIN32 if (flags & EVFLAG_FORKCHECK) curpid = getpid (); #endif if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) flags = atoi (getenv ("LIBEV_FLAGS")); ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; rtmn_diff = ev_rt_now - mn_now; #if EV_FEATURE_API invoke_cb = ev_invoke_pending; #endif io_blocktime = 0.; timeout_blocktime = 0.; backend = 0; backend_fd = -1; sig_pending = 0; #if EV_ASYNC_ENABLE async_pending = 0; #endif pipe_write_skipped = 0; pipe_write_wanted = 0; evpipe [0] = -1; evpipe [1] = -1; #if EV_USE_INOTIFY fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; #endif #if EV_USE_SIGNALFD sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; #endif if (!(flags & EVBACKEND_MASK)) flags |= ev_recommended_backends (); #if EV_USE_IOCP if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); #endif #if EV_USE_PORT if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); #endif #if EV_USE_KQUEUE if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); #endif #if EV_USE_EPOLL if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); #endif #if EV_USE_POLL if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); #endif #if EV_USE_SELECT if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); #endif ev_prepare_init (&pending_w, pendingcb); #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE ev_init (&pipe_w, pipecb); ev_set_priority (&pipe_w, EV_MAXPRI); #endif } } /* free up a loop structure */ void ecb_cold ev_loop_destroy (EV_P) { int i; #if EV_MULTIPLICITY /* mimic free (0) */ if (!EV_A) return; #endif #if EV_CLEANUP_ENABLE /* queue cleanup watchers (and execute them) */ if (expect_false (cleanupcnt)) { queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); EV_INVOKE_PENDING; } #endif #if EV_CHILD_ENABLE if (ev_is_default_loop (EV_A) && ev_is_active (&childev)) { ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); } #endif if (ev_is_active (&pipe_w)) { /*ev_ref (EV_A);*/ /*ev_io_stop (EV_A_ &pipe_w);*/ if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]); } #if EV_USE_SIGNALFD if (ev_is_active (&sigfd_w)) close (sigfd); #endif #if EV_USE_INOTIFY if (fs_fd >= 0) close (fs_fd); #endif if (backend_fd >= 0) close (backend_fd); #if EV_USE_IOCP if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); #endif #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_destroy (EV_A); #endif #if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); #endif #if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); #endif #if EV_USE_POLL if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); #endif #if EV_USE_SELECT if (backend == EVBACKEND_SELECT) select_destroy (EV_A); #endif for (i = NUMPRI; i--; ) { array_free (pending, [i]); #if EV_IDLE_ENABLE array_free (idle, [i]); #endif } ev_free (anfds); anfds = 0; anfdmax = 0; /* have to use the microsoft-never-gets-it-right macro */ array_free (rfeed, EMPTY); array_free (fdchange, EMPTY); array_free (timer, EMPTY); #if EV_PERIODIC_ENABLE array_free (periodic, EMPTY); #endif #if EV_FORK_ENABLE array_free (fork, EMPTY); #endif #if EV_CLEANUP_ENABLE array_free (cleanup, EMPTY); #endif array_free (prepare, EMPTY); array_free (check, EMPTY); #if EV_ASYNC_ENABLE array_free (async, EMPTY); #endif backend = 0; #if EV_MULTIPLICITY if (ev_is_default_loop (EV_A)) #endif ev_default_loop_ptr = 0; #if EV_MULTIPLICITY else ev_free (EV_A); #endif } #if EV_USE_INOTIFY inline_size void infy_fork (EV_P); #endif inline_size void loop_fork (EV_P) { #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_fork (EV_A); #endif #if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); #endif #if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); #endif #if EV_USE_INOTIFY infy_fork (EV_A); #endif #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE if (ev_is_active (&pipe_w)) { /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ ev_ref (EV_A); ev_io_stop (EV_A_ &pipe_w); if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); evpipe_init (EV_A); /* iterate over everything, in case we missed something before */ ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); } #endif postfork = 0; } #if EV_MULTIPLICITY struct ev_loop * ecb_cold ev_loop_new (unsigned int flags) EV_THROW { EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); memset (EV_A, 0, sizeof (struct ev_loop)); loop_init (EV_A_ flags); if (ev_backend (EV_A)) return EV_A; ev_free (EV_A); return 0; } #endif /* multiplicity */ #if EV_VERIFY static void noinline ecb_cold verify_watcher (EV_P_ W w) { assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); if (w->pending) assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); } static void noinline ecb_cold verify_heap (EV_P_ ANHE *heap, int N) { int i; for (i = HEAP0; i < N + HEAP0; ++i) { assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); verify_watcher (EV_A_ (W)ANHE_w (heap [i])); } } static void noinline ecb_cold array_verify (EV_P_ W *ws, int cnt) { while (cnt--) { assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); verify_watcher (EV_A_ ws [cnt]); } } #endif #if EV_FEATURE_API void ecb_cold ev_verify (EV_P) EV_THROW { #if EV_VERIFY int i; WL w, w2; assert (activecnt >= -1); assert (fdchangemax >= fdchangecnt); for (i = 0; i < fdchangecnt; ++i) assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); assert (anfdmax >= 0); for (i = 0; i < anfdmax; ++i) { int j = 0; for (w = w2 = anfds [i].head; w; w = w->next) { verify_watcher (EV_A_ (W)w); if (j++ & 1) { assert (("libev: io watcher list contains a loop", w != w2)); w2 = w2->next; } assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); } } assert (timermax >= timercnt); verify_heap (EV_A_ timers, timercnt); #if EV_PERIODIC_ENABLE assert (periodicmax >= periodiccnt); verify_heap (EV_A_ periodics, periodiccnt); #endif for (i = NUMPRI; i--; ) { assert (pendingmax [i] >= pendingcnt [i]); #if EV_IDLE_ENABLE assert (idleall >= 0); assert (idlemax [i] >= idlecnt [i]); array_verify (EV_A_ (W *)idles [i], idlecnt [i]); #endif } #if EV_FORK_ENABLE assert (forkmax >= forkcnt); array_verify (EV_A_ (W *)forks, forkcnt); #endif #if EV_CLEANUP_ENABLE assert (cleanupmax >= cleanupcnt); array_verify (EV_A_ (W *)cleanups, cleanupcnt); #endif #if EV_ASYNC_ENABLE assert (asyncmax >= asynccnt); array_verify (EV_A_ (W *)asyncs, asynccnt); #endif #if EV_PREPARE_ENABLE assert (preparemax >= preparecnt); array_verify (EV_A_ (W *)prepares, preparecnt); #endif #if EV_CHECK_ENABLE assert (checkmax >= checkcnt); array_verify (EV_A_ (W *)checks, checkcnt); #endif # if 0 #if EV_CHILD_ENABLE for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) #endif # endif #endif } #endif #if EV_MULTIPLICITY struct ev_loop * ecb_cold #else int #endif ev_default_loop (unsigned int flags) EV_THROW { if (!ev_default_loop_ptr) { #if EV_MULTIPLICITY EV_P = ev_default_loop_ptr = &default_loop_struct; #else ev_default_loop_ptr = 1; #endif loop_init (EV_A_ flags); if (ev_backend (EV_A)) { #if EV_CHILD_ENABLE ev_signal_init (&childev, childcb, SIGCHLD); ev_set_priority (&childev, EV_MAXPRI); ev_signal_start (EV_A_ &childev); ev_unref (EV_A); /* child watcher should not keep loop alive */ #endif } else ev_default_loop_ptr = 0; } return ev_default_loop_ptr; } void ev_loop_fork (EV_P) EV_THROW { postfork = 1; } /*****************************************************************************/ void ev_invoke (EV_P_ void *w, int revents) { EV_CB_INVOKE ((W)w, revents); } unsigned int ev_pending_count (EV_P) EV_THROW { int pri; unsigned int count = 0; for (pri = NUMPRI; pri--; ) count += pendingcnt [pri]; return count; } void noinline ev_invoke_pending (EV_P) { pendingpri = NUMPRI; while (pendingpri) /* pendingpri possibly gets modified in the inner loop */ { --pendingpri; while (pendingcnt [pendingpri]) { ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; p->w->pending = 0; EV_CB_INVOKE (p->w, p->events); EV_FREQUENT_CHECK; } } } #if EV_IDLE_ENABLE /* make idle watchers pending. this handles the "call-idle */ /* only when higher priorities are idle" logic */ inline_size void idle_reify (EV_P) { if (expect_false (idleall)) { int pri; for (pri = NUMPRI; pri--; ) { if (pendingcnt [pri]) break; if (idlecnt [pri]) { queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); break; } } } } #endif /* make timers pending */ inline_size void timers_reify (EV_P) { EV_FREQUENT_CHECK; if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) { do { ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->repeat) { ev_at (w) += w->repeat; if (ev_at (w) < mn_now) ev_at (w) = mn_now; assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); ANHE_at_cache (timers [HEAP0]); downheap (timers, timercnt, HEAP0); } else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); feed_reverse_done (EV_A_ EV_TIMER); } } #if EV_PERIODIC_ENABLE static void noinline periodic_recalc (EV_P_ ev_periodic *w) { ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); /* the above almost always errs on the low side */ while (at <= ev_rt_now) { ev_tstamp nat = at + w->interval; /* when resolution fails us, we use ev_rt_now */ if (expect_false (nat == at)) { at = ev_rt_now; break; } at = nat; } ev_at (w) = at; } /* make periodics pending */ inline_size void periodics_reify (EV_P) { EV_FREQUENT_CHECK; while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) { do { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->reschedule_cb) { ev_at (w) = w->reschedule_cb (w, ev_rt_now); assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else if (w->interval) { periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); feed_reverse_done (EV_A_ EV_PERIODIC); } } /* simply recalculate all periodics */ /* TODO: maybe ensure that at least one event happens when jumping forward? */ static void noinline ecb_cold periodics_reschedule (EV_P) { int i; /* adjust periodics after time jump */ for (i = HEAP0; i < periodiccnt + HEAP0; ++i) { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [i]); } reheap (periodics, periodiccnt); } #endif /* adjust all timers by a given offset */ static void noinline ecb_cold timers_reschedule (EV_P_ ev_tstamp adjust) { int i; for (i = 0; i < timercnt; ++i) { ANHE *he = timers + i + HEAP0; ANHE_w (*he)->at += adjust; ANHE_at_cache (*he); } } /* fetch new monotonic and realtime times from the kernel */ /* also detect if there was a timejump, and act accordingly */ inline_speed void time_update (EV_P_ ev_tstamp max_block) { #if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { int i; ev_tstamp odiff = rtmn_diff; mn_now = get_clock (); /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ /* interpolate in the meantime */ if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) { ev_rt_now = rtmn_diff + mn_now; return; } now_floor = mn_now; ev_rt_now = ev_time (); /* loop a few times, before making important decisions. * on the choice of "4": one iteration isn't enough, * in case we get preempted during the calls to * ev_time and get_clock. a second call is almost guaranteed * to succeed in that case, though. and looping a few more times * doesn't hurt either as we only do this on time-jumps or * in the unlikely event of having been preempted here. */ for (i = 4; --i; ) { ev_tstamp diff; rtmn_diff = ev_rt_now - mn_now; diff = odiff - rtmn_diff; if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) return; /* all is well */ ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; } /* no timer adjustment, as the monotonic clock doesn't jump */ /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ # if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); # endif } else #endif { ev_rt_now = ev_time (); if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) { /* adjust timers. this is easy, as the offset is the same for all of them */ timers_reschedule (EV_A_ ev_rt_now - mn_now); #if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); #endif } mn_now = ev_rt_now; } } int ev_run (EV_P_ int flags) { #if EV_FEATURE_API ++loop_depth; #endif assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); loop_done = EVBREAK_CANCEL; EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ do { #if EV_VERIFY >= 2 ev_verify (EV_A); #endif #ifndef _WIN32 if (expect_false (curpid)) /* penalise the forking check even more */ if (expect_false (getpid () != curpid)) { curpid = getpid (); postfork = 1; } #endif #if EV_FORK_ENABLE /* we might have forked, so queue fork handlers */ if (expect_false (postfork)) if (forkcnt) { queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); EV_INVOKE_PENDING; } #endif #if EV_PREPARE_ENABLE /* queue prepare watchers (and execute them) */ if (expect_false (preparecnt)) { queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); EV_INVOKE_PENDING; } #endif if (expect_false (loop_done)) break; /* we might have forked, so reify kernel state if necessary */ if (expect_false (postfork)) loop_fork (EV_A); /* update fd-related kernel structures */ fd_reify (EV_A); /* calculate blocking time */ { ev_tstamp waittime = 0.; ev_tstamp sleeptime = 0.; /* remember old timestamp for io_blocktime calculation */ ev_tstamp prev_mn_now = mn_now; /* update time to cancel out callback processing overhead */ time_update (EV_A_ 1e100); /* from now on, we want a pipe-wake-up */ pipe_write_wanted = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) { waittime = MAX_BLOCKTIME; if (timercnt) { ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; if (waittime > to) waittime = to; } #if EV_PERIODIC_ENABLE if (periodiccnt) { ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; if (waittime > to) waittime = to; } #endif /* don't let timeouts decrease the waittime below timeout_blocktime */ if (expect_false (waittime < timeout_blocktime)) waittime = timeout_blocktime; /* at this point, we NEED to wait, so we have to ensure */ /* to pass a minimum nonzero value to the backend */ if (expect_false (waittime < backend_mintime)) waittime = backend_mintime; /* extra check because io_blocktime is commonly 0 */ if (expect_false (io_blocktime)) { sleeptime = io_blocktime - (mn_now - prev_mn_now); if (sleeptime > waittime - backend_mintime) sleeptime = waittime - backend_mintime; if (expect_true (sleeptime > 0.)) { ev_sleep (sleeptime); waittime -= sleeptime; } } } #if EV_FEATURE_API ++loop_count; #endif assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ backend_poll (EV_A_ waittime); assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ pipe_write_wanted = 0; /* just an optimisation, no fence needed */ ECB_MEMORY_FENCE_ACQUIRE; if (pipe_write_skipped) { assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); } /* update ev_rt_now, do magic */ time_update (EV_A_ waittime + sleeptime); } /* queue pending timers and reschedule them */ timers_reify (EV_A); /* relative timers called last */ #if EV_PERIODIC_ENABLE periodics_reify (EV_A); /* absolute timers called first */ #endif #if EV_IDLE_ENABLE /* queue idle watchers unless other events are pending */ idle_reify (EV_A); #endif #if EV_CHECK_ENABLE /* queue check watchers, to be executed first */ if (expect_false (checkcnt)) queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); #endif EV_INVOKE_PENDING; } while (expect_true ( activecnt && !loop_done && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) )); if (loop_done == EVBREAK_ONE) loop_done = EVBREAK_CANCEL; #if EV_FEATURE_API --loop_depth; #endif return activecnt; } void ev_break (EV_P_ int how) EV_THROW { loop_done = how; } void ev_ref (EV_P) EV_THROW { ++activecnt; } void ev_unref (EV_P) EV_THROW { --activecnt; } int ev_activecnt (EV_P) EV_THROW { return activecnt; } void ev_now_update (EV_P) EV_THROW { time_update (EV_A_ 1e100); } void ev_suspend (EV_P) EV_THROW { ev_now_update (EV_A); } void ev_resume (EV_P) EV_THROW { ev_tstamp mn_prev = mn_now; ev_now_update (EV_A); timers_reschedule (EV_A_ mn_now - mn_prev); #if EV_PERIODIC_ENABLE /* TODO: really do this? */ periodics_reschedule (EV_A); #endif } /*****************************************************************************/ /* singly-linked list management, used when the expected list length is short */ inline_size void wlist_add (WL *head, WL elem) { elem->next = *head; *head = elem; } inline_size void wlist_del (WL *head, WL elem) { while (*head) { if (expect_true (*head == elem)) { *head = elem->next; break; } head = &(*head)->next; } } /* internal, faster, version of ev_clear_pending */ inline_speed void clear_pending (EV_P_ W w) { if (w->pending) { pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; w->pending = 0; } } int ev_clear_pending (EV_P_ void *w) EV_THROW { W w_ = (W)w; int pending = w_->pending; if (expect_true (pending)) { ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; p->w = (W)&pending_w; w_->pending = 0; return p->events; } else return 0; } inline_size void pri_adjust (EV_P_ W w) { int pri = ev_priority (w); pri = pri < EV_MINPRI ? EV_MINPRI : pri; pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; ev_set_priority (w, pri); } inline_speed void ev_start (EV_P_ W w, int active) { pri_adjust (EV_A_ w); w->active = active; ev_ref (EV_A); } inline_size void ev_stop (EV_P_ W w) { ev_unref (EV_A); w->active = 0; } /*****************************************************************************/ void noinline ev_io_start (EV_P_ ev_io *w) EV_THROW { int fd = w->fd; if (expect_false (ev_is_active (w))) return; assert (("libev: ev_io_start called with negative fd", fd >= 0)); assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); wlist_add (&anfds[fd].head, (WL)w); /* common bug, apparently */ assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w)); fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); w->events &= ~EV__IOFDSET; EV_FREQUENT_CHECK; } void noinline ev_io_stop (EV_P_ ev_io *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); EV_FREQUENT_CHECK; wlist_del (&anfds[w->fd].head, (WL)w); ev_stop (EV_A_ (W)w); fd_change (EV_A_ w->fd, EV_ANFD_REIFY); EV_FREQUENT_CHECK; } void noinline ev_timer_start (EV_P_ ev_timer *w) EV_THROW { if (expect_false (ev_is_active (w))) return; ev_at (w) += mn_now; assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); EV_FREQUENT_CHECK; ++timercnt; ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); ANHE_w (timers [ev_active (w)]) = (WT)w; ANHE_at_cache (timers [ev_active (w)]); upheap (timers, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ } void noinline ev_timer_stop (EV_P_ ev_timer *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); --timercnt; if (expect_true (active < timercnt + HEAP0)) { timers [active] = timers [timercnt + HEAP0]; adjustheap (timers, timercnt, active); } } ev_at (w) -= mn_now; ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } void noinline ev_timer_again (EV_P_ ev_timer *w) EV_THROW { EV_FREQUENT_CHECK; clear_pending (EV_A_ (W)w); if (ev_is_active (w)) { if (w->repeat) { ev_at (w) = mn_now + w->repeat; ANHE_at_cache (timers [ev_active (w)]); adjustheap (timers, timercnt, ev_active (w)); } else ev_timer_stop (EV_A_ w); } else if (w->repeat) { ev_at (w) = w->repeat; ev_timer_start (EV_A_ w); } EV_FREQUENT_CHECK; } ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW { return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); } #if EV_PERIODIC_ENABLE void noinline ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW { if (expect_false (ev_is_active (w))) return; if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) { assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); periodic_recalc (EV_A_ w); } else ev_at (w) = w->offset; EV_FREQUENT_CHECK; ++periodiccnt; ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); ANHE_w (periodics [ev_active (w)]) = (WT)w; ANHE_at_cache (periodics [ev_active (w)]); upheap (periodics, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ } void noinline ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); --periodiccnt; if (expect_true (active < periodiccnt + HEAP0)) { periodics [active] = periodics [periodiccnt + HEAP0]; adjustheap (periodics, periodiccnt, active); } } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } void noinline ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW { /* TODO: use adjustheap and recalculation */ ev_periodic_stop (EV_A_ w); ev_periodic_start (EV_A_ w); } #endif #ifndef SA_RESTART # define SA_RESTART 0 #endif #if EV_SIGNAL_ENABLE void noinline ev_signal_start (EV_P_ ev_signal *w) EV_THROW { if (expect_false (ev_is_active (w))) return; assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); #if EV_MULTIPLICITY assert (("libev: a signal must not be attached to two different loops", !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); signals [w->signum - 1].loop = EV_A; ECB_MEMORY_FENCE_RELEASE; #endif EV_FREQUENT_CHECK; #if EV_USE_SIGNALFD if (sigfd == -2) { sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); if (sigfd < 0 && errno == EINVAL) sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ if (sigfd >= 0) { fd_intern (sigfd); /* doing it twice will not hurt */ sigemptyset (&sigfd_set); ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); ev_set_priority (&sigfd_w, EV_MAXPRI); ev_io_start (EV_A_ &sigfd_w); ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ } } if (sigfd >= 0) { /* TODO: check .head */ sigaddset (&sigfd_set, w->signum); sigprocmask (SIG_BLOCK, &sigfd_set, 0); signalfd (sigfd, &sigfd_set, 0); } #endif ev_start (EV_A_ (W)w, 1); wlist_add (&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next) # if EV_USE_SIGNALFD if (sigfd < 0) /*TODO*/ # endif { # ifdef _WIN32 evpipe_init (EV_A); signal (w->signum, ev_sighandler); # else struct sigaction sa; evpipe_init (EV_A); sa.sa_handler = ev_sighandler; sigfillset (&sa.sa_mask); sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ sigaction (w->signum, &sa, 0); if (origflags & EVFLAG_NOSIGMASK) { sigemptyset (&sa.sa_mask); sigaddset (&sa.sa_mask, w->signum); sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); } #endif } EV_FREQUENT_CHECK; } void noinline ev_signal_stop (EV_P_ ev_signal *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&signals [w->signum - 1].head, (WL)w); ev_stop (EV_A_ (W)w); if (!signals [w->signum - 1].head) { #if EV_MULTIPLICITY signals [w->signum - 1].loop = 0; /* unattach from signal */ #endif #if EV_USE_SIGNALFD if (sigfd >= 0) { sigset_t ss; sigemptyset (&ss); sigaddset (&ss, w->signum); sigdelset (&sigfd_set, w->signum); signalfd (sigfd, &sigfd_set, 0); sigprocmask (SIG_UNBLOCK, &ss, 0); } else #endif signal (w->signum, SIG_DFL); } EV_FREQUENT_CHECK; } #endif #if EV_CHILD_ENABLE void ev_child_start (EV_P_ ev_child *w) EV_THROW { #if EV_MULTIPLICITY assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); #endif if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); EV_FREQUENT_CHECK; } void ev_child_stop (EV_P_ ev_child *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_STAT_ENABLE # ifdef _WIN32 # undef lstat # define lstat(a,b) _stati64 (a,b) # endif #define DEF_STAT_INTERVAL 5.0074891 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ #define MIN_STAT_INTERVAL 0.1074891 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); #if EV_USE_INOTIFY /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) static void noinline infy_add (EV_P_ ev_stat *w) { w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO | IN_DONT_FOLLOW | IN_MASK_ADD); if (w->wd >= 0) { struct statfs sfs; /* now local changes will be tracked by inotify, but remote changes won't */ /* unless the filesystem is known to be local, we therefore still poll */ /* also do poll on <2.6.25, but with normal frequency */ if (!fs_2625) w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; else if (!statfs (w->path, &sfs) && (sfs.f_type == 0x1373 /* devfs */ || sfs.f_type == 0x4006 /* fat */ || sfs.f_type == 0x4d44 /* msdos */ || sfs.f_type == 0xEF53 /* ext2/3 */ || sfs.f_type == 0x72b6 /* jffs2 */ || sfs.f_type == 0x858458f6 /* ramfs */ || sfs.f_type == 0x5346544e /* ntfs */ || sfs.f_type == 0x3153464a /* jfs */ || sfs.f_type == 0x9123683e /* btrfs */ || sfs.f_type == 0x52654973 /* reiser3 */ || sfs.f_type == 0x01021994 /* tmpfs */ || sfs.f_type == 0x58465342 /* xfs */)) w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ else w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ } else { /* can't use inotify, continue to stat */ w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; /* if path is not there, monitor some parent directory for speedup hints */ /* note that exceeding the hardcoded path limit is not a correctness issue, */ /* but an efficiency issue only */ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) { char path [4096]; strcpy (path, w->path); do { int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); char *pend = strrchr (path, '/'); if (!pend || pend == path) break; *pend = 0; w->wd = inotify_add_watch (fs_fd, path, mask); } while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); } } if (w->wd >= 0) wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); /* now re-arm timer, if required */ if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A); } static void noinline infy_del (EV_P_ ev_stat *w) { int slot; int wd = w->wd; if (wd < 0) return; w->wd = -2; slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); wlist_del (&fs_hash [slot].head, (WL)w); /* remove this watcher, if others are watching it, they will rearm */ inotify_rm_watch (fs_fd, wd); } static void noinline infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) { if (slot < 0) /* overflow, need to check for all hash slots */ for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) infy_wd (EV_A_ slot, wd, ev); else { WL w_; for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us remove this watcher and all before it */ if (w->wd == wd || wd == -1) { if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) { wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); w->wd = -1; infy_add (EV_A_ w); /* re-add, no matter what */ } stat_timer_cb (EV_A_ &w->timer, 0); } } } } static void infy_cb (EV_P_ ev_io *w, int revents) { char buf [EV_INOTIFY_BUFSIZE]; int ofs; int len = read (fs_fd, buf, sizeof (buf)); for (ofs = 0; ofs < len; ) { struct inotify_event *ev = (struct inotify_event *)(buf + ofs); infy_wd (EV_A_ ev->wd, ev->wd, ev); ofs += sizeof (struct inotify_event) + ev->len; } } inline_size void ecb_cold ev_check_2625 (EV_P) { /* kernels < 2.6.25 are borked * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html */ if (ev_linux_version () < 0x020619) return; fs_2625 = 1; } inline_size int infy_newfd (void) { #if defined IN_CLOEXEC && defined IN_NONBLOCK int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); if (fd >= 0) return fd; #endif return inotify_init (); } inline_size void infy_init (EV_P) { if (fs_fd != -2) return; fs_fd = -1; ev_check_2625 (EV_A); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); ev_set_priority (&fs_w, EV_MAXPRI); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); } } inline_size void infy_fork (EV_P) { int slot; if (fs_fd < 0) return; ev_ref (EV_A); ev_io_stop (EV_A_ &fs_w); close (fs_fd); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_set (&fs_w, fs_fd, EV_READ); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); } for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) { WL w_ = fs_hash [slot].head; fs_hash [slot].head = 0; while (w_) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us add this watcher */ w->wd = -1; if (fs_fd >= 0) infy_add (EV_A_ w); /* re-add, no matter what */ else { w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A); } } } } #endif #ifdef _WIN32 # define EV_LSTAT(p,b) _stati64 (p, b) #else # define EV_LSTAT(p,b) lstat (p, b) #endif void ev_stat_stat (EV_P_ ev_stat *w) EV_THROW { if (lstat (w->path, &w->attr) < 0) w->attr.st_nlink = 0; else if (!w->attr.st_nlink) w->attr.st_nlink = 1; } static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents) { ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); ev_statdata prev = w->attr; ev_stat_stat (EV_A_ w); /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ if ( prev.st_dev != w->attr.st_dev || prev.st_ino != w->attr.st_ino || prev.st_mode != w->attr.st_mode || prev.st_nlink != w->attr.st_nlink || prev.st_uid != w->attr.st_uid || prev.st_gid != w->attr.st_gid || prev.st_rdev != w->attr.st_rdev || prev.st_size != w->attr.st_size || prev.st_atime != w->attr.st_atime || prev.st_mtime != w->attr.st_mtime || prev.st_ctime != w->attr.st_ctime # if HAVE_STRUCT_STAT_ST_MTIM || prev.st_atim.tv_nsec != w->attr.st_atim.tv_nsec || prev.st_mtim.tv_nsec != w->attr.st_mtim.tv_nsec || prev.st_ctim.tv_nsec != w->attr.st_ctim.tv_nsec # elif HAVE_STRUCT_STAT_ST_MTIMENSEC || prev.st_atimensec != w->attr.st_atimensec || prev.st_mtimensec != w->attr.st_mtimensec || prev.st_ctimensec != w->attr.st_ctimensec # endif ) { /* we only update w->prev on actual differences */ /* in case we test more often than invoke the callback, */ /* to ensure that prev is always different to attr */ w->prev = prev; #if EV_USE_INOTIFY if (fs_fd >= 0) { infy_del (EV_A_ w); infy_add (EV_A_ w); ev_stat_stat (EV_A_ w); /* avoid race... */ } #endif ev_feed_event (EV_A_ w, EV_STAT); } } void ev_stat_start (EV_P_ ev_stat *w) EV_THROW { if (expect_false (ev_is_active (w))) return; ev_stat_stat (EV_A_ w); if (w->interval < MIN_STAT_INTERVAL && w->interval) w->interval = MIN_STAT_INTERVAL; ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); ev_set_priority (&w->timer, ev_priority (w)); #if EV_USE_INOTIFY infy_init (EV_A); if (fs_fd >= 0) infy_add (EV_A_ w); else #endif { ev_timer_again (EV_A_ &w->timer); ev_unref (EV_A); } ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK; } void ev_stat_stop (EV_P_ ev_stat *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; #if EV_USE_INOTIFY infy_del (EV_A_ w); #endif if (ev_is_active (&w->timer)) { ev_ref (EV_A); ev_timer_stop (EV_A_ &w->timer); } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_IDLE_ENABLE void ev_idle_start (EV_P_ ev_idle *w) EV_THROW { if (expect_false (ev_is_active (w))) return; pri_adjust (EV_A_ (W)w); EV_FREQUENT_CHECK; { int active = ++idlecnt [ABSPRI (w)]; ++idleall; ev_start (EV_A_ (W)w, active); array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); idles [ABSPRI (w)][active - 1] = w; } EV_FREQUENT_CHECK; } void ev_idle_stop (EV_P_ ev_idle *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; ev_active (idles [ABSPRI (w)][active - 1]) = active; ev_stop (EV_A_ (W)w); --idleall; } EV_FREQUENT_CHECK; } #endif #if EV_PREPARE_ENABLE void ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW { if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++preparecnt); array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); prepares [preparecnt - 1] = w; EV_FREQUENT_CHECK; } void ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); prepares [active - 1] = prepares [--preparecnt]; ev_active (prepares [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_CHECK_ENABLE void ev_check_start (EV_P_ ev_check *w) EV_THROW { if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++checkcnt); array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); checks [checkcnt - 1] = w; EV_FREQUENT_CHECK; } void ev_check_stop (EV_P_ ev_check *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); checks [active - 1] = checks [--checkcnt]; ev_active (checks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_EMBED_ENABLE void noinline ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW { ev_run (w->other, EVRUN_NOWAIT); } static void embed_io_cb (EV_P_ ev_io *io, int revents) { ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); if (ev_cb (w)) ev_feed_event (EV_A_ (W)w, EV_EMBED); else ev_run (w->other, EVRUN_NOWAIT); } static void embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) { ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); { EV_P = w->other; while (fdchangecnt) { fd_reify (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } } } static void embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) { ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); ev_embed_stop (EV_A_ w); { EV_P = w->other; ev_loop_fork (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } ev_embed_start (EV_A_ w); } #if 0 static void embed_idle_cb (EV_P_ ev_idle *idle, int revents) { ev_idle_stop (EV_A_ idle); } #endif void ev_embed_start (EV_P_ ev_embed *w) EV_THROW { if (expect_false (ev_is_active (w))) return; { EV_P = w->other; assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); } EV_FREQUENT_CHECK; ev_set_priority (&w->io, ev_priority (w)); ev_io_start (EV_A_ &w->io); ev_prepare_init (&w->prepare, embed_prepare_cb); ev_set_priority (&w->prepare, EV_MINPRI); ev_prepare_start (EV_A_ &w->prepare); ev_fork_init (&w->fork, embed_fork_cb); ev_fork_start (EV_A_ &w->fork); /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK; } void ev_embed_stop (EV_P_ ev_embed *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_io_stop (EV_A_ &w->io); ev_prepare_stop (EV_A_ &w->prepare); ev_fork_stop (EV_A_ &w->fork); ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_FORK_ENABLE void ev_fork_start (EV_P_ ev_fork *w) EV_THROW { if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++forkcnt); array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); forks [forkcnt - 1] = w; EV_FREQUENT_CHECK; } void ev_fork_stop (EV_P_ ev_fork *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); forks [active - 1] = forks [--forkcnt]; ev_active (forks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_CLEANUP_ENABLE void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW { if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++cleanupcnt); array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); cleanups [cleanupcnt - 1] = w; /* cleanup watchers should never keep a refcount on the loop */ ev_unref (EV_A); EV_FREQUENT_CHECK; } void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_ref (EV_A); { int active = ev_active (w); cleanups [active - 1] = cleanups [--cleanupcnt]; ev_active (cleanups [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_ASYNC_ENABLE void ev_async_start (EV_P_ ev_async *w) EV_THROW { if (expect_false (ev_is_active (w))) return; w->sent = 0; evpipe_init (EV_A); EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++asynccnt); array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); asyncs [asynccnt - 1] = w; EV_FREQUENT_CHECK; } void ev_async_stop (EV_P_ ev_async *w) EV_THROW { clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); asyncs [active - 1] = asyncs [--asynccnt]; ev_active (asyncs [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } void ev_async_send (EV_P_ ev_async *w) EV_THROW { w->sent = 1; evpipe_write (EV_A_ &async_pending); } #endif /*****************************************************************************/ struct ev_once { ev_io io; ev_timer to; void (*cb)(int revents, void *arg); void *arg; }; static void once_cb (EV_P_ struct ev_once *once, int revents) { void (*cb)(int revents, void *arg) = once->cb; void *arg = once->arg; ev_io_stop (EV_A_ &once->io); ev_timer_stop (EV_A_ &once->to); ev_free (once); cb (revents, arg); } static void once_cb_io (EV_P_ ev_io *w, int revents) { struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); } static void once_cb_to (EV_P_ ev_timer *w, int revents) { struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); } void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW { struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); if (expect_false (!once)) { cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg); return; } once->cb = cb; once->arg = arg; ev_init (&once->io, once_cb_io); if (fd >= 0) { ev_io_set (&once->io, fd, events); ev_io_start (EV_A_ &once->io); } ev_init (&once->to, once_cb_to); if (timeout >= 0.) { ev_timer_set (&once->to, timeout, 0.); ev_timer_start (EV_A_ &once->to); } } /*****************************************************************************/ #if EV_WALK_ENABLE void ecb_cold ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW { int i, j; ev_watcher_list *wl, *wn; if (types & (EV_IO | EV_EMBED)) for (i = 0; i < anfdmax; ++i) for (wl = anfds [i].head; wl; ) { wn = wl->next; #if EV_EMBED_ENABLE if (ev_cb ((ev_io *)wl) == embed_io_cb) { if (types & EV_EMBED) cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); } else #endif #if EV_USE_INOTIFY if (ev_cb ((ev_io *)wl) == infy_cb) ; else #endif if ((ev_io *)wl != &pipe_w) if (types & EV_IO) cb (EV_A_ EV_IO, wl); wl = wn; } if (types & (EV_TIMER | EV_STAT)) for (i = timercnt + HEAP0; i-- > HEAP0; ) #if EV_STAT_ENABLE /*TODO: timer is not always active*/ if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) { if (types & EV_STAT) cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); } else #endif if (types & EV_TIMER) cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); #if EV_PERIODIC_ENABLE if (types & EV_PERIODIC) for (i = periodiccnt + HEAP0; i-- > HEAP0; ) cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); #endif #if EV_IDLE_ENABLE if (types & EV_IDLE) for (j = NUMPRI; j--; ) for (i = idlecnt [j]; i--; ) cb (EV_A_ EV_IDLE, idles [j][i]); #endif #if EV_FORK_ENABLE if (types & EV_FORK) for (i = forkcnt; i--; ) if (ev_cb (forks [i]) != embed_fork_cb) cb (EV_A_ EV_FORK, forks [i]); #endif #if EV_ASYNC_ENABLE if (types & EV_ASYNC) for (i = asynccnt; i--; ) cb (EV_A_ EV_ASYNC, asyncs [i]); #endif #if EV_PREPARE_ENABLE if (types & EV_PREPARE) for (i = preparecnt; i--; ) # if EV_EMBED_ENABLE if (ev_cb (prepares [i]) != embed_prepare_cb) # endif cb (EV_A_ EV_PREPARE, prepares [i]); #endif #if EV_CHECK_ENABLE if (types & EV_CHECK) for (i = checkcnt; i--; ) cb (EV_A_ EV_CHECK, checks [i]); #endif #if EV_SIGNAL_ENABLE if (types & EV_SIGNAL) for (i = 0; i < EV_NSIG - 1; ++i) for (wl = signals [i].head; wl; ) { wn = wl->next; cb (EV_A_ EV_SIGNAL, wl); wl = wn; } #endif #if EV_CHILD_ENABLE if (types & EV_CHILD) for (i = (EV_PID_HASHSIZE); i--; ) for (wl = childs [i]; wl; ) { wn = wl->next; cb (EV_A_ EV_CHILD, wl); wl = wn; } #endif /* EV_STAT 0x00001000 /* stat data changed */ /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ } #endif #if EV_MULTIPLICITY #include "ev_wrap.h" #endif tarantool_1.6.7.588.g76bbd9c/third_party/libev/ev.30000664000000000000000000100435512634006617020310 0ustar rootroot.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" libev \- a high performance full\-featured event loop written in C .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include .Ve .SS "\s-1EXAMPLE PROGRAM\s0" .IX Subsection "EXAMPLE PROGRAM" .Vb 2 \& // a single header file is required \& #include \& \& #include // for puts \& \& // every watcher type has its own typedef\*(Aqd struct \& // with the name ev_TYPE \& ev_io stdin_watcher; \& ev_timer timeout_watcher; \& \& // all watcher callbacks have a similar signature \& // this callback is called when data is readable on stdin \& static void \& stdin_cb (EV_P_ ev_io *w, int revents) \& { \& puts ("stdin ready"); \& // for one\-shot events, one must manually stop the watcher \& // with its corresponding stop function. \& ev_io_stop (EV_A_ w); \& \& // this causes all nested ev_run\*(Aqs to stop iterating \& ev_break (EV_A_ EVBREAK_ALL); \& } \& \& // another callback, this time for a time\-out \& static void \& timeout_cb (EV_P_ ev_timer *w, int revents) \& { \& puts ("timeout"); \& // this causes the innermost ev_run to stop iterating \& ev_break (EV_A_ EVBREAK_ONE); \& } \& \& int \& main (void) \& { \& // use the default event loop unless you have special needs \& struct ev_loop *loop = EV_DEFAULT; \& \& // initialise an io watcher, then start it \& // this one will watch for stdin to become readable \& ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& \& // initialise a timer watcher, then start it \& // simple non\-repeating 5.5 second timeout \& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); \& ev_timer_start (loop, &timeout_watcher); \& \& // now wait for events to arrive \& ev_run (loop, 0); \& \& // break was called, so exit \& return 0; \& } .Ve .SH "ABOUT THIS DOCUMENT" .IX Header "ABOUT THIS DOCUMENT" This document documents the libev software package. .PP The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: . .PP While this document tries to be as complete as possible in documenting libev, its usage and the rationale behind its design, it is not a tutorial on event-based programming, nor will it introduce event-based programming with libev. .PP Familiarity with event based programming techniques in general is assumed throughout this document. .SH "WHAT TO READ WHEN IN A HURRY" .IX Header "WHAT TO READ WHEN IN A HURRY" This manual tries to be very detailed, but unfortunately, this also makes it very long. If you just want to know the basics of libev, I suggest reading \*(L"\s-1ANATOMY OF A WATCHER\*(R"\s0, then the \*(L"\s-1EXAMPLE PROGRAM\*(R"\s0 above and look up the missing functions in \*(L"\s-1GLOBAL FUNCTIONS\*(R"\s0 and the \f(CW\*(C`ev_io\*(C'\fR and \&\f(CW\*(C`ev_timer\*(C'\fR sections in \*(L"\s-1WATCHER TYPES\*(R"\s0. .SH "ABOUT LIBEV" .IX Header "ABOUT LIBEV" Libev is an event loop: you register interest in certain events (such as a file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. .PP To do this, it must take more or less complete control over your process (or thread) by executing the \fIevent loop\fR handler, and will then communicate events via a callback mechanism. .PP You register interest in certain events by registering so-called \fIevent watchers\fR, which are relatively small C structures you initialise with the details of the event, and then hand it over to libev by \fIstarting\fR the watcher. .SS "\s-1FEATURES\s0" .IX Subsection "FEATURES" Libev supports \f(CW\*(C`select\*(C'\fR, \f(CW\*(C`poll\*(C'\fR, the Linux-specific \f(CW\*(C`epoll\*(C'\fR, the BSD-specific \f(CW\*(C`kqueue\*(C'\fR and the Solaris-specific event port mechanisms for file descriptor events (\f(CW\*(C`ev_io\*(C'\fR), the Linux \f(CW\*(C`inotify\*(C'\fR interface (for \f(CW\*(C`ev_stat\*(C'\fR), Linux eventfd/signalfd (for faster and cleaner inter-thread wakeup (\f(CW\*(C`ev_async\*(C'\fR)/signal handling (\f(CW\*(C`ev_signal\*(C'\fR)) relative timers (\f(CW\*(C`ev_timer\*(C'\fR), absolute timers with customised rescheduling (\f(CW\*(C`ev_periodic\*(C'\fR), synchronous signals (\f(CW\*(C`ev_signal\*(C'\fR), process status change events (\f(CW\*(C`ev_child\*(C'\fR), and event watchers dealing with the event loop mechanism itself (\f(CW\*(C`ev_idle\*(C'\fR, \f(CW\*(C`ev_embed\*(C'\fR, \f(CW\*(C`ev_prepare\*(C'\fR and \&\f(CW\*(C`ev_check\*(C'\fR watchers) as well as file watchers (\f(CW\*(C`ev_stat\*(C'\fR) and even limited support for fork events (\f(CW\*(C`ev_fork\*(C'\fR). .PP It also is quite fast (see this benchmark comparing it to libevent for example). .SS "\s-1CONVENTIONS\s0" .IX Subsection "CONVENTIONS" Libev is very configurable. In this manual the default (and most common) configuration will be described, which supports multiple event loops. For more info about various configuration options please have a look at \&\fB\s-1EMBED\s0\fR section in this manual. If libev was configured without support for multiple event loops, then all functions taking an initial argument of name \f(CW\*(C`loop\*(C'\fR (which is always of type \f(CW\*(C`struct ev_loop *\*(C'\fR) will not have this argument. .SS "\s-1TIME REPRESENTATION\s0" .IX Subsection "TIME REPRESENTATION" Libev represents time as a single floating point number, representing the (fractional) number of seconds since the (\s-1POSIX\s0) epoch (in practice somewhere near the beginning of 1970, details are complicated, don't ask). This type is called \f(CW\*(C`ev_tstamp\*(C'\fR, which is what you should use too. It usually aliases to the \f(CW\*(C`double\*(C'\fR type in C. When you need to do any calculations on it, you should treat it as some floating point value. .PP Unlike the name component \f(CW\*(C`stamp\*(C'\fR might indicate, it is also used for time differences (e.g. delays) throughout libev. .SH "ERROR HANDLING" .IX Header "ERROR HANDLING" Libev knows three classes of errors: operating system errors, usage errors and internal errors (bugs). .PP When libev catches an operating system error it cannot handle (for example a system call indicating a condition libev cannot fix), it calls the callback set via \f(CW\*(C`ev_set_syserr_cb\*(C'\fR, which is supposed to fix the problem or abort. The default is to print a diagnostic message and to call \f(CW\*(C`abort ()\*(C'\fR. .PP When libev detects a usage error such as a negative timer interval, then it will print a diagnostic message and abort (via the \f(CW\*(C`assert\*(C'\fR mechanism, so \f(CW\*(C`NDEBUG\*(C'\fR will disable this checking): these are programming errors in the libev caller and need to be fixed there. .PP Libev also has a few internal error-checking \f(CW\*(C`assert\*(C'\fRions, and also has extensive consistency checking code. These do not trigger under normal circumstances, as they indicate either a bug in libev or worse. .SH "GLOBAL FUNCTIONS" .IX Header "GLOBAL FUNCTIONS" These functions can be called anytime, even before initialising the library in any way. .IP "ev_tstamp ev_time ()" 4 .IX Item "ev_tstamp ev_time ()" Returns the current time as libev would use it. Please note that the \&\f(CW\*(C`ev_now\*(C'\fR function is usually faster and also often returns the timestamp you actually want to know. Also interesting is the combination of \&\f(CW\*(C`ev_now_update\*(C'\fR and \f(CW\*(C`ev_now\*(C'\fR. .IP "ev_sleep (ev_tstamp interval)" 4 .IX Item "ev_sleep (ev_tstamp interval)" Sleep for the given interval: The current thread will be blocked until either it is interrupted or the given time interval has passed (approximately \- it might return a bit earlier even if not interrupted). Returns immediately if \f(CW\*(C`interval <= 0\*(C'\fR. .Sp Basically this is a sub-second-resolution \f(CW\*(C`sleep ()\*(C'\fR. .Sp The range of the \f(CW\*(C`interval\*(C'\fR is limited \- libev only guarantees to work with sleep times of up to one day (\f(CW\*(C`interval <= 86400\*(C'\fR). .IP "int ev_version_major ()" 4 .IX Item "int ev_version_major ()" .PD 0 .IP "int ev_version_minor ()" 4 .IX Item "int ev_version_minor ()" .PD You can find out the major and minor \s-1ABI\s0 version numbers of the library you linked against by calling the functions \f(CW\*(C`ev_version_major\*(C'\fR and \&\f(CW\*(C`ev_version_minor\*(C'\fR. If you want, you can compare against the global symbols \f(CW\*(C`EV_VERSION_MAJOR\*(C'\fR and \f(CW\*(C`EV_VERSION_MINOR\*(C'\fR, which specify the version of the library your program was compiled against. .Sp These version numbers refer to the \s-1ABI\s0 version of the library, not the release version. .Sp Usually, it's a good idea to terminate if the major versions mismatch, as this indicates an incompatible change. Minor versions are usually compatible to older versions, so a larger minor version alone is usually not a problem. .Sp Example: Make sure we haven't accidentally been linked against the wrong version (note, however, that this will not detect other \s-1ABI\s0 mismatches, such as \s-1LFS\s0 or reentrancy). .Sp .Vb 3 \& assert (("libev version mismatch", \& ev_version_major () == EV_VERSION_MAJOR \& && ev_version_minor () >= EV_VERSION_MINOR)); .Ve .IP "unsigned int ev_supported_backends ()" 4 .IX Item "unsigned int ev_supported_backends ()" Return the set of all backends (i.e. their corresponding \f(CW\*(C`EV_BACKEND_*\*(C'\fR value) compiled into this binary of libev (independent of their availability on the system you are running on). See \f(CW\*(C`ev_default_loop\*(C'\fR for a description of the set values. .Sp Example: make sure we have the epoll method, because yeah this is cool and a must have and can we have a torrent of it please!!!11 .Sp .Vb 2 \& assert (("sorry, no epoll, no sex", \& ev_supported_backends () & EVBACKEND_EPOLL)); .Ve .IP "unsigned int ev_recommended_backends ()" 4 .IX Item "unsigned int ev_recommended_backends ()" Return the set of all backends compiled into this binary of libev and also recommended for this platform, meaning it will work for most file descriptor types. This set is often smaller than the one returned by \&\f(CW\*(C`ev_supported_backends\*(C'\fR, as for example kqueue is broken on most BSDs and will not be auto-detected unless you explicitly request it (assuming you know what you are doing). This is the set of backends that libev will probe for if you specify no backends explicitly. .IP "unsigned int ev_embeddable_backends ()" 4 .IX Item "unsigned int ev_embeddable_backends ()" Returns the set of backends that are embeddable in other event loops. This value is platform-specific but can include backends not available on the current system. To find which embeddable backends might be supported on the current system, you would need to look at \f(CW\*(C`ev_embeddable_backends () & ev_supported_backends ()\*(C'\fR, likewise for recommended ones. .Sp See the description of \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .IP "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" 4 .IX Item "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" Sets the allocation function to use (the prototype is similar \- the semantics are identical to the \f(CW\*(C`realloc\*(C'\fR C89/SuS/POSIX function). It is used to allocate and free memory (no surprises here). If it returns zero when memory needs to be allocated (\f(CW\*(C`size != 0\*(C'\fR), the library might abort or take some potentially destructive action. .Sp Since some systems (at least OpenBSD and Darwin) fail to implement correct \f(CW\*(C`realloc\*(C'\fR semantics, libev will use a wrapper around the system \&\f(CW\*(C`realloc\*(C'\fR and \f(CW\*(C`free\*(C'\fR functions by default. .Sp You could override this function in high-availability programs to, say, free some memory if it cannot allocate memory, to use a special allocator, or even to sleep a while and retry until some memory is available. .Sp Example: Replace the libev allocator with one that waits a bit and then retries (example requires a standards-compliant \f(CW\*(C`realloc\*(C'\fR). .Sp .Vb 6 \& static void * \& persistent_realloc (void *ptr, size_t size) \& { \& for (;;) \& { \& void *newptr = realloc (ptr, size); \& \& if (newptr) \& return newptr; \& \& sleep (60); \& } \& } \& \& ... \& ev_set_allocator (persistent_realloc); .Ve .IP "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" 4 .IX Item "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" Set the callback function to call on a retryable system call error (such as failed select, poll, epoll_wait). The message is a printable string indicating the system call or subsystem causing the problem. If this callback is set, then libev will expect it to remedy the situation, no matter what, when it returns. That is, libev will generally retry the requested operation, or, if the condition doesn't go away, do bad stuff (such as abort). .Sp Example: This is basically the same thing that libev does internally, too. .Sp .Vb 6 \& static void \& fatal_error (const char *msg) \& { \& perror (msg); \& abort (); \& } \& \& ... \& ev_set_syserr_cb (fatal_error); .Ve .IP "ev_feed_signal (int signum)" 4 .IX Item "ev_feed_signal (int signum)" This function can be used to \*(L"simulate\*(R" a signal receive. It is completely safe to call this function at any time, from any context, including signal handlers or random threads. .Sp Its main use is to customise signal handling in your process, especially in the presence of threads. For example, you could block signals by default in all threads (and specifying \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR when creating any loops), and in one thread, use \f(CW\*(C`sigwait\*(C'\fR or any other mechanism to wait for signals, then \*(L"deliver\*(R" them to libev by calling \&\f(CW\*(C`ev_feed_signal\*(C'\fR. .SH "FUNCTIONS CONTROLLING EVENT LOOPS" .IX Header "FUNCTIONS CONTROLLING EVENT LOOPS" An event loop is described by a \f(CW\*(C`struct ev_loop *\*(C'\fR (the \f(CW\*(C`struct\*(C'\fR is \&\fInot\fR optional in this case unless libev 3 compatibility is disabled, as libev 3 had an \f(CW\*(C`ev_loop\*(C'\fR function colliding with the struct name). .PP The library knows two types of such loops, the \fIdefault\fR loop, which supports child process events, and dynamically created event loops which do not. .IP "struct ev_loop *ev_default_loop (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_default_loop (unsigned int flags)" This returns the \*(L"default\*(R" event loop object, which is what you should normally use when you just need \*(L"the event loop\*(R". Event loop objects and the \f(CW\*(C`flags\*(C'\fR parameter are described in more detail in the entry for \&\f(CW\*(C`ev_loop_new\*(C'\fR. .Sp If the default loop is already initialised then this function simply returns it (and ignores the flags. If that is troubling you, check \&\f(CW\*(C`ev_backend ()\*(C'\fR afterwards). Otherwise it will create it with the given flags, which should almost always be \f(CW0\fR, unless the caller is also the one calling \f(CW\*(C`ev_run\*(C'\fR or otherwise qualifies as \*(L"the main program\*(R". .Sp If you don't know what event loop to use, use the one returned from this function (or via the \f(CW\*(C`EV_DEFAULT\*(C'\fR macro). .Sp Note that this function is \fInot\fR thread-safe, so if you want to use it from multiple threads, you have to employ some kind of mutex (note also that this case is unlikely, as loops cannot be shared easily between threads anyway). .Sp The default loop is the only loop that can handle \f(CW\*(C`ev_child\*(C'\fR watchers, and to do this, it always registers a handler for \f(CW\*(C`SIGCHLD\*(C'\fR. If this is a problem for your application you can either create a dynamic loop with \&\f(CW\*(C`ev_loop_new\*(C'\fR which doesn't do that, or you can simply overwrite the \&\f(CW\*(C`SIGCHLD\*(C'\fR signal handler \fIafter\fR calling \f(CW\*(C`ev_default_init\*(C'\fR. .Sp Example: This is the most typical usage. .Sp .Vb 2 \& if (!ev_default_loop (0)) \& fatal ("could not initialise libev, bad $LIBEV_FLAGS in environment?"); .Ve .Sp Example: Restrict libev to the select and poll backends, and do not allow environment settings to be taken into account: .Sp .Vb 1 \& ev_default_loop (EVBACKEND_POLL | EVBACKEND_SELECT | EVFLAG_NOENV); .Ve .IP "struct ev_loop *ev_loop_new (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_loop_new (unsigned int flags)" This will create and initialise a new event loop object. If the loop could not be initialised, returns false. .Sp This function is thread-safe, and one common way to use libev with threads is indeed to create one loop per thread, and using the default loop in the \*(L"main\*(R" or \*(L"initial\*(R" thread. .Sp The flags argument can be used to specify special behaviour or specific backends to use, and is usually specified as \f(CW0\fR (or \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). .Sp The following flags are supported: .RS 4 .ie n .IP """EVFLAG_AUTO""" 4 .el .IP "\f(CWEVFLAG_AUTO\fR" 4 .IX Item "EVFLAG_AUTO" The default flags value. Use this if you have no clue (it's the right thing, believe me). .ie n .IP """EVFLAG_NOENV""" 4 .el .IP "\f(CWEVFLAG_NOENV\fR" 4 .IX Item "EVFLAG_NOENV" If this flag bit is or'ed into the flag value (or the program runs setuid or setgid) then libev will \fInot\fR look at the environment variable \&\f(CW\*(C`LIBEV_FLAGS\*(C'\fR. Otherwise (the default), this environment variable will override the flags completely if it is found in the environment. This is useful to try out specific backends to test their performance, to work around bugs, or to make libev threadsafe (accessing environment variables cannot be done in a threadsafe way, but usually it works if no other thread modifies them). .ie n .IP """EVFLAG_FORKCHECK""" 4 .el .IP "\f(CWEVFLAG_FORKCHECK\fR" 4 .IX Item "EVFLAG_FORKCHECK" Instead of calling \f(CW\*(C`ev_loop_fork\*(C'\fR manually after a fork, you can also make libev check for a fork in each iteration by enabling this flag. .Sp This works by calling \f(CW\*(C`getpid ()\*(C'\fR on every iteration of the loop, and thus this might slow down your event loop if you do a lot of loop iterations and little real work, but is usually not noticeable (on my GNU/Linux system for example, \f(CW\*(C`getpid\*(C'\fR is actually a simple 5\-insn sequence without a system call and thus \fIvery\fR fast, but my GNU/Linux system also has \&\f(CW\*(C`pthread_atfork\*(C'\fR which is even faster). .Sp The big advantage of this flag is that you can forget about fork (and forget about forgetting to tell libev about forking) when you use this flag. .Sp This flag setting cannot be overridden or specified in the \f(CW\*(C`LIBEV_FLAGS\*(C'\fR environment variable. .ie n .IP """EVFLAG_NOINOTIFY""" 4 .el .IP "\f(CWEVFLAG_NOINOTIFY\fR" 4 .IX Item "EVFLAG_NOINOTIFY" When this flag is specified, then libev will not attempt to use the \&\fIinotify\fR \s-1API\s0 for its \f(CW\*(C`ev_stat\*(C'\fR watchers. Apart from debugging and testing, this flag can be useful to conserve inotify file descriptors, as otherwise each loop using \f(CW\*(C`ev_stat\*(C'\fR watchers consumes one inotify handle. .ie n .IP """EVFLAG_SIGNALFD""" 4 .el .IP "\f(CWEVFLAG_SIGNALFD\fR" 4 .IX Item "EVFLAG_SIGNALFD" When this flag is specified, then libev will attempt to use the \&\fIsignalfd\fR \s-1API\s0 for its \f(CW\*(C`ev_signal\*(C'\fR (and \f(CW\*(C`ev_child\*(C'\fR) watchers. This \s-1API\s0 delivers signals synchronously, which makes it both faster and might make it possible to get the queued signal data. It can also simplify signal handling with threads, as long as you properly block signals in your threads that are not interested in handling them. .Sp Signalfd will not be used by default as this changes your signal mask, and there are a lot of shoddy libraries and programs (glib's threadpool for example) that can't properly initialise their signal masks. .ie n .IP """EVFLAG_NOSIGMASK""" 4 .el .IP "\f(CWEVFLAG_NOSIGMASK\fR" 4 .IX Item "EVFLAG_NOSIGMASK" When this flag is specified, then libev will avoid to modify the signal mask. Specifically, this means you have to make sure signals are unblocked when you want to receive them. .Sp This behaviour is useful when you want to do your own signal handling, or want to handle signals only in specific threads and want to avoid libev unblocking the signals. .Sp It's also required by \s-1POSIX\s0 in a threaded program, as libev calls \&\f(CW\*(C`sigprocmask\*(C'\fR, whose behaviour is officially unspecified. .Sp This flag's behaviour will become the default in future versions of libev. .ie n .IP """EVBACKEND_SELECT"" (value 1, portable select backend)" 4 .el .IP "\f(CWEVBACKEND_SELECT\fR (value 1, portable select backend)" 4 .IX Item "EVBACKEND_SELECT (value 1, portable select backend)" This is your standard \fIselect\fR\|(2) backend. Not \fIcompletely\fR standard, as libev tries to roll its own fd_set with no limits on the number of fds, but if that fails, expect a fairly low limit on the number of fds when using this backend. It doesn't scale too well (O(highest_fd)), but its usually the fastest backend for a low number of (low-numbered :) fds. .Sp To get good performance out of this backend you need a high amount of parallelism (most of the file descriptors should be busy). If you are writing a server, you should \f(CW\*(C`accept ()\*(C'\fR in a loop to accept as many connections as possible during one iteration. You might also want to have a look at \f(CW\*(C`ev_set_io_collect_interval ()\*(C'\fR to increase the amount of readiness notifications you get per iteration. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR to the \f(CW\*(C`readfds\*(C'\fR set and \f(CW\*(C`EV_WRITE\*(C'\fR to the \&\f(CW\*(C`writefds\*(C'\fR set (and to work around Microsoft Windows bugs, also onto the \&\f(CW\*(C`exceptfds\*(C'\fR set on that platform). .ie n .IP """EVBACKEND_POLL"" (value 2, poll backend, available everywhere except on windows)" 4 .el .IP "\f(CWEVBACKEND_POLL\fR (value 2, poll backend, available everywhere except on windows)" 4 .IX Item "EVBACKEND_POLL (value 2, poll backend, available everywhere except on windows)" And this is your standard \fIpoll\fR\|(2) backend. It's more complicated than select, but handles sparse fds better and has no artificial limit on the number of fds you can use (except it will slow down considerably with a lot of inactive fds). It scales similarly to select, i.e. O(total_fds). See the entry for \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR, above, for performance tips. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR to \f(CW\*(C`POLLIN | POLLERR | POLLHUP\*(C'\fR, and \&\f(CW\*(C`EV_WRITE\*(C'\fR to \f(CW\*(C`POLLOUT | POLLERR | POLLHUP\*(C'\fR. .ie n .IP """EVBACKEND_EPOLL"" (value 4, Linux)" 4 .el .IP "\f(CWEVBACKEND_EPOLL\fR (value 4, Linux)" 4 .IX Item "EVBACKEND_EPOLL (value 4, Linux)" Use the linux-specific \fIepoll\fR\|(7) interface (for both pre\- and post\-2.6.9 kernels). .Sp For few fds, this backend is a bit little slower than poll and select, but it scales phenomenally better. While poll and select usually scale like O(total_fds) where total_fds is the total number of fds (or the highest fd), epoll scales either O(1) or O(active_fds). .Sp The epoll mechanism deserves honorable mention as the most misdesigned of the more advanced event mechanisms: mere annoyances include silently dropping file descriptors, requiring a system call per change per file descriptor (and unnecessary guessing of parameters), problems with dup, returning before the timeout value, resulting in additional iterations (and only giving 5ms accuracy while select on the same platform gives 0.1ms) and so on. The biggest issue is fork races, however \- if a program forks then \fIboth\fR parent and child process have to recreate the epoll set, which can take considerable time (one syscall per file descriptor) and is of course hard to detect. .Sp Epoll is also notoriously buggy \- embedding epoll fds \fIshould\fR work, but of course \fIdoesn't\fR, and epoll just loves to report events for totally \fIdifferent\fR file descriptors (even already closed ones, so one cannot even remove them from the set) than registered in the set (especially on \s-1SMP\s0 systems). Libev tries to counter these spurious notifications by employing an additional generation counter and comparing that against the events to filter out spurious ones, recreating the set when required. Epoll also erroneously rounds down timeouts, but gives you no way to know when and by how much, so sometimes you have to busy-wait because epoll returns immediately despite a nonzero timeout. And last not least, it also refuses to work with some file descriptors which work perfectly fine with \f(CW\*(C`select\*(C'\fR (files, many character devices...). .Sp Epoll is truly the train wreck among event poll mechanisms, a frankenpoll, cobbled together in a hurry, no thought to design or interaction with others. Oh, the pain, will it ever stop... .Sp While stopping, setting and starting an I/O watcher in the same iteration will result in some caching, there is still a system call per such incident (because the same \fIfile descriptor\fR could point to a different \&\fIfile description\fR now), so its best to avoid that. Also, \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors might not work very well if you register events for both file descriptors. .Sp Best performance from this backend is achieved by not unregistering all watchers for a file descriptor until it has been closed, if possible, i.e. keep at least one watcher active per fd at all times. Stopping and starting a watcher (without re-setting it) also usually doesn't cause extra overhead. A fork can both result in spurious notifications as well as in libev having to destroy and recreate the epoll object, which can take considerable time and thus should be avoided. .Sp All this means that, in practice, \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR can be as fast or faster than epoll for maybe up to a hundred file descriptors, depending on the usage. So sad. .Sp While nominally embeddable in other event loops, this feature is broken in all kernel versions tested so far. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR and \f(CW\*(C`EV_WRITE\*(C'\fR in the same way as \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .ie n .IP """EVBACKEND_KQUEUE"" (value 8, most \s-1BSD\s0 clones)" 4 .el .IP "\f(CWEVBACKEND_KQUEUE\fR (value 8, most \s-1BSD\s0 clones)" 4 .IX Item "EVBACKEND_KQUEUE (value 8, most BSD clones)" Kqueue deserves special mention, as at the time of this writing, it was broken on all BSDs except NetBSD (usually it doesn't work reliably with anything but sockets and pipes, except on Darwin, where of course it's completely useless). Unlike epoll, however, whose brokenness is by design, these kqueue bugs can (and eventually will) be fixed without \s-1API\s0 changes to existing programs. For this reason it's not being \&\*(L"auto-detected\*(R" unless you explicitly specify it in the flags (i.e. using \&\f(CW\*(C`EVBACKEND_KQUEUE\*(C'\fR) or libev was compiled on a known-to-be-good (\-enough) system like NetBSD. .Sp You still can embed kqueue into a normal poll or select backend and use it only for sockets (after having made sure that sockets work with kqueue on the target platform). See \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .Sp It scales in the same way as the epoll backend, but the interface to the kernel is more efficient (which says nothing about its actual speed, of course). While stopping, setting and starting an I/O watcher does never cause an extra system call as with \f(CW\*(C`EVBACKEND_EPOLL\*(C'\fR, it still adds up to two event changes per incident. Support for \f(CW\*(C`fork ()\*(C'\fR is very bad (you might have to leak fd's on fork, but it's more sane than epoll) and it drops fds silently in similarly hard-to-detect cases. .Sp This backend usually performs well under most conditions. .Sp While nominally embeddable in other event loops, this doesn't work everywhere, so you might need to test for this. And since it is broken almost everywhere, you should only use it when you have a lot of sockets (for which it usually works), by embedding it into another event loop (e.g. \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR (but \f(CW\*(C`poll\*(C'\fR is of course also broken on \s-1OS X\s0)) and, did I mention it, using it only for sockets. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR into an \f(CW\*(C`EVFILT_READ\*(C'\fR kevent with \&\f(CW\*(C`NOTE_EOF\*(C'\fR, and \f(CW\*(C`EV_WRITE\*(C'\fR into an \f(CW\*(C`EVFILT_WRITE\*(C'\fR kevent with \&\f(CW\*(C`NOTE_EOF\*(C'\fR. .ie n .IP """EVBACKEND_DEVPOLL"" (value 16, Solaris 8)" 4 .el .IP "\f(CWEVBACKEND_DEVPOLL\fR (value 16, Solaris 8)" 4 .IX Item "EVBACKEND_DEVPOLL (value 16, Solaris 8)" This is not implemented yet (and might never be, unless you send me an implementation). According to reports, \f(CW\*(C`/dev/poll\*(C'\fR only supports sockets and is not embeddable, which would limit the usefulness of this backend immensely. .ie n .IP """EVBACKEND_PORT"" (value 32, Solaris 10)" 4 .el .IP "\f(CWEVBACKEND_PORT\fR (value 32, Solaris 10)" 4 .IX Item "EVBACKEND_PORT (value 32, Solaris 10)" This uses the Solaris 10 event port mechanism. As with everything on Solaris, it's really slow, but it still scales very well (O(active_fds)). .Sp While this backend scales well, it requires one system call per active file descriptor per loop iteration. For small and medium numbers of file descriptors a \*(L"slow\*(R" \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR backend might perform better. .Sp On the positive side, this backend actually performed fully to specification in all tests and is fully embeddable, which is a rare feat among the OS-specific backends (I vastly prefer correctness over speed hacks). .Sp On the negative side, the interface is \fIbizarre\fR \- so bizarre that even sun itself gets it wrong in their code examples: The event polling function sometimes returns events to the caller even though an error occurred, but with no indication whether it has done so or not (yes, it's even documented that way) \- deadly for edge-triggered interfaces where you absolutely have to know whether an event occurred or not because you have to re-arm the watcher. .Sp Fortunately libev seems to be able to work around these idiocies. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR and \f(CW\*(C`EV_WRITE\*(C'\fR in the same way as \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .ie n .IP """EVBACKEND_ALL""" 4 .el .IP "\f(CWEVBACKEND_ALL\fR" 4 .IX Item "EVBACKEND_ALL" Try all backends (even potentially broken ones that wouldn't be tried with \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). Since this is a mask, you can do stuff such as \&\f(CW\*(C`EVBACKEND_ALL & ~EVBACKEND_KQUEUE\*(C'\fR. .Sp It is definitely not recommended to use this flag, use whatever \&\f(CW\*(C`ev_recommended_backends ()\*(C'\fR returns, or simply do not specify a backend at all. .ie n .IP """EVBACKEND_MASK""" 4 .el .IP "\f(CWEVBACKEND_MASK\fR" 4 .IX Item "EVBACKEND_MASK" Not a backend at all, but a mask to select all backend bits from a \&\f(CW\*(C`flags\*(C'\fR value, in case you want to mask out any backends from a flags value (e.g. when modifying the \f(CW\*(C`LIBEV_FLAGS\*(C'\fR environment variable). .RE .RS 4 .Sp If one or more of the backend flags are or'ed into the flags value, then only these backends will be tried (in the reverse order as listed here). If none are specified, all backends in \f(CW\*(C`ev_recommended_backends ()\*(C'\fR will be tried. .Sp Example: Try to create a event loop that uses epoll and nothing else. .Sp .Vb 3 \& struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); \& if (!epoller) \& fatal ("no epoll found here, maybe it hides under your chair"); .Ve .Sp Example: Use whatever libev has to offer, but make sure that kqueue is used if available. .Sp .Vb 1 \& struct ev_loop *loop = ev_loop_new (ev_recommended_backends () | EVBACKEND_KQUEUE); .Ve .RE .IP "ev_loop_destroy (loop)" 4 .IX Item "ev_loop_destroy (loop)" Destroys an event loop object (frees all memory and kernel state etc.). None of the active event watchers will be stopped in the normal sense, so e.g. \f(CW\*(C`ev_is_active\*(C'\fR might still return true. It is your responsibility to either stop all watchers cleanly yourself \fIbefore\fR calling this function, or cope with the fact afterwards (which is usually the easiest thing, you can just ignore the watchers and/or \f(CW\*(C`free ()\*(C'\fR them for example). .Sp Note that certain global state, such as signal state (and installed signal handlers), will not be freed by this function, and related watchers (such as signal and child watchers) would need to be stopped manually. .Sp This function is normally used on loop objects allocated by \&\f(CW\*(C`ev_loop_new\*(C'\fR, but it can also be used on the default loop returned by \&\f(CW\*(C`ev_default_loop\*(C'\fR, in which case it is not thread-safe. .Sp Note that it is not advisable to call this function on the default loop except in the rare occasion where you really need to free its resources. If you need dynamically allocated loops it is better to use \f(CW\*(C`ev_loop_new\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR. .IP "ev_loop_fork (loop)" 4 .IX Item "ev_loop_fork (loop)" This function sets a flag that causes subsequent \f(CW\*(C`ev_run\*(C'\fR iterations to reinitialise the kernel state for backends that have one. Despite the name, you can call it anytime you are allowed to start or stop watchers (except inside an \f(CW\*(C`ev_prepare\*(C'\fR callback), but it makes most sense after forking, in the child process. You \fImust\fR call it (or use \&\f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR) in the child before resuming or calling \f(CW\*(C`ev_run\*(C'\fR. .Sp Again, you \fIhave\fR to call it on \fIany\fR loop that you want to re-use after a fork, \fIeven if you do not plan to use the loop in the parent\fR. This is because some kernel interfaces *cough* \fIkqueue\fR *cough* do funny things during fork. .Sp On the other hand, you only need to call this function in the child process if and only if you want to use the event loop in the child. If you just fork+exec or create a new loop in the child, you don't have to call it at all (in fact, \f(CW\*(C`epoll\*(C'\fR is so badly broken that it makes a difference, but libev will usually detect this case on its own and do a costly reset of the backend). .Sp The function itself is quite fast and it's usually not a problem to call it just in case after a fork. .Sp Example: Automate calling \f(CW\*(C`ev_loop_fork\*(C'\fR on the default loop when using pthreads. .Sp .Vb 5 \& static void \& post_fork_child (void) \& { \& ev_loop_fork (EV_DEFAULT); \& } \& \& ... \& pthread_atfork (0, 0, post_fork_child); .Ve .IP "int ev_is_default_loop (loop)" 4 .IX Item "int ev_is_default_loop (loop)" Returns true when the given loop is, in fact, the default loop, and false otherwise. .IP "unsigned int ev_iteration (loop)" 4 .IX Item "unsigned int ev_iteration (loop)" Returns the current iteration count for the event loop, which is identical to the number of times libev did poll for new events. It starts at \f(CW0\fR and happily wraps around with enough iterations. .Sp This value can sometimes be useful as a generation counter of sorts (it \&\*(L"ticks\*(R" the number of loop iterations), as it roughly corresponds with \&\f(CW\*(C`ev_prepare\*(C'\fR and \f(CW\*(C`ev_check\*(C'\fR calls \- and is incremented between the prepare and check phases. .IP "unsigned int ev_depth (loop)" 4 .IX Item "unsigned int ev_depth (loop)" Returns the number of times \f(CW\*(C`ev_run\*(C'\fR was entered minus the number of times \f(CW\*(C`ev_run\*(C'\fR was exited normally, in other words, the recursion depth. .Sp Outside \f(CW\*(C`ev_run\*(C'\fR, this number is zero. In a callback, this number is \&\f(CW1\fR, unless \f(CW\*(C`ev_run\*(C'\fR was invoked recursively (or from another thread), in which case it is higher. .Sp Leaving \f(CW\*(C`ev_run\*(C'\fR abnormally (setjmp/longjmp, cancelling the thread, throwing an exception etc.), doesn't count as \*(L"exit\*(R" \- consider this as a hint to avoid such ungentleman-like behaviour unless it's really convenient, in which case it is fully supported. .IP "unsigned int ev_backend (loop)" 4 .IX Item "unsigned int ev_backend (loop)" Returns one of the \f(CW\*(C`EVBACKEND_*\*(C'\fR flags indicating the event backend in use. .IP "ev_tstamp ev_now (loop)" 4 .IX Item "ev_tstamp ev_now (loop)" Returns the current \*(L"event loop time\*(R", which is the time the event loop received events and started processing them. This timestamp does not change as long as callbacks are being processed, and this is also the base time used for relative timers. You can treat it as the timestamp of the event occurring (or more correctly, libev finding out about it). .IP "ev_now_update (loop)" 4 .IX Item "ev_now_update (loop)" Establishes the current time by querying the kernel, updating the time returned by \f(CW\*(C`ev_now ()\*(C'\fR in the progress. This is a costly operation and is usually done automatically within \f(CW\*(C`ev_run ()\*(C'\fR. .Sp This function is rarely useful, but when some event callback runs for a very long time without entering the event loop, updating libev's idea of the current time is a good idea. .Sp See also \*(L"The special problem of time updates\*(R" in the \f(CW\*(C`ev_timer\*(C'\fR section. .IP "ev_suspend (loop)" 4 .IX Item "ev_suspend (loop)" .PD 0 .IP "ev_resume (loop)" 4 .IX Item "ev_resume (loop)" .PD These two functions suspend and resume an event loop, for use when the loop is not used for a while and timeouts should not be processed. .Sp A typical use case would be an interactive program such as a game: When the user presses \f(CW\*(C`^Z\*(C'\fR to suspend the game and resumes it an hour later it would be best to handle timeouts as if no time had actually passed while the program was suspended. This can be achieved by calling \f(CW\*(C`ev_suspend\*(C'\fR in your \f(CW\*(C`SIGTSTP\*(C'\fR handler, sending yourself a \f(CW\*(C`SIGSTOP\*(C'\fR and calling \&\f(CW\*(C`ev_resume\*(C'\fR directly afterwards to resume timer processing. .Sp Effectively, all \f(CW\*(C`ev_timer\*(C'\fR watchers will be delayed by the time spend between \f(CW\*(C`ev_suspend\*(C'\fR and \f(CW\*(C`ev_resume\*(C'\fR, and all \f(CW\*(C`ev_periodic\*(C'\fR watchers will be rescheduled (that is, they will lose any events that would have occurred while suspended). .Sp After calling \f(CW\*(C`ev_suspend\*(C'\fR you \fBmust not\fR call \fIany\fR function on the given loop other than \f(CW\*(C`ev_resume\*(C'\fR, and you \fBmust not\fR call \f(CW\*(C`ev_resume\*(C'\fR without a previous call to \f(CW\*(C`ev_suspend\*(C'\fR. .Sp Calling \f(CW\*(C`ev_suspend\*(C'\fR/\f(CW\*(C`ev_resume\*(C'\fR has the side effect of updating the event loop time (see \f(CW\*(C`ev_now_update\*(C'\fR). .IP "bool ev_run (loop, int flags)" 4 .IX Item "bool ev_run (loop, int flags)" Finally, this is it, the event handler. This function usually is called after you have initialised all your watchers and you want to start handling events. It will ask the operating system for any new events, call the watcher callbacks, and then repeat the whole process indefinitely: This is why event loops are called \fIloops\fR. .Sp If the flags argument is specified as \f(CW0\fR, it will keep handling events until either no event watchers are active anymore or \f(CW\*(C`ev_break\*(C'\fR was called. .Sp The return value is false if there are no more active watchers (which usually means \*(L"all jobs done\*(R" or \*(L"deadlock\*(R"), and true in all other cases (which usually means " you should call \f(CW\*(C`ev_run\*(C'\fR again"). .Sp Please note that an explicit \f(CW\*(C`ev_break\*(C'\fR is usually better than relying on all watchers to be stopped when deciding when a program has finished (especially in interactive programs), but having a program that automatically loops as long as it has to and no longer by virtue of relying on its watchers stopping correctly, that is truly a thing of beauty. .Sp This function is \fImostly\fR exception-safe \- you can break out of a \&\f(CW\*(C`ev_run\*(C'\fR call by calling \f(CW\*(C`longjmp\*(C'\fR in a callback, throwing a \*(C+ exception and so on. This does not decrement the \f(CW\*(C`ev_depth\*(C'\fR value, nor will it clear any outstanding \f(CW\*(C`EVBREAK_ONE\*(C'\fR breaks. .Sp A flags value of \f(CW\*(C`EVRUN_NOWAIT\*(C'\fR will look for new events, will handle those events and any already outstanding ones, but will not wait and block your process in case there are no events and will return after one iteration of the loop. This is sometimes useful to poll and handle new events while doing lengthy calculations, to keep the program responsive. .Sp A flags value of \f(CW\*(C`EVRUN_ONCE\*(C'\fR will look for new events (waiting if necessary) and will handle those and any already outstanding ones. It will block your process until at least one new event arrives (which could be an event internal to libev itself, so there is no guarantee that a user-registered callback will be called), and will return after one iteration of the loop. .Sp This is useful if you are waiting for some external event in conjunction with something not expressible using other libev watchers (i.e. "roll your own \f(CW\*(C`ev_run\*(C'\fR"). However, a pair of \f(CW\*(C`ev_prepare\*(C'\fR/\f(CW\*(C`ev_check\*(C'\fR watchers is usually a better approach for this kind of thing. .Sp Here are the gory details of what \f(CW\*(C`ev_run\*(C'\fR does (this is for your understanding, not a guarantee that things will work exactly like this in future versions): .Sp .Vb 10 \& \- Increment loop depth. \& \- Reset the ev_break status. \& \- Before the first iteration, call any pending watchers. \& LOOP: \& \- If EVFLAG_FORKCHECK was used, check for a fork. \& \- If a fork was detected (by any means), queue and call all fork watchers. \& \- Queue and call all prepare watchers. \& \- If ev_break was called, goto FINISH. \& \- If we have been forked, detach and recreate the kernel state \& as to not disturb the other process. \& \- Update the kernel state with all outstanding changes. \& \- Update the "event loop time" (ev_now ()). \& \- Calculate for how long to sleep or block, if at all \& (active idle watchers, EVRUN_NOWAIT or not having \& any active watchers at all will result in not sleeping). \& \- Sleep if the I/O and timer collect interval say so. \& \- Increment loop iteration counter. \& \- Block the process, waiting for any events. \& \- Queue all outstanding I/O (fd) events. \& \- Update the "event loop time" (ev_now ()), and do time jump adjustments. \& \- Queue all expired timers. \& \- Queue all expired periodics. \& \- Queue all idle watchers with priority higher than that of pending events. \& \- Queue all check watchers. \& \- Call all queued watchers in reverse order (i.e. check watchers first). \& Signals and child watchers are implemented as I/O watchers, and will \& be handled here by queueing them when their watcher gets executed. \& \- If ev_break has been called, or EVRUN_ONCE or EVRUN_NOWAIT \& were used, or there are no active watchers, goto FINISH, otherwise \& continue with step LOOP. \& FINISH: \& \- Reset the ev_break status iff it was EVBREAK_ONE. \& \- Decrement the loop depth. \& \- Return. .Ve .Sp Example: Queue some jobs and then loop until no events are outstanding anymore. .Sp .Vb 4 \& ... queue jobs here, make sure they register event watchers as long \& ... as they still have work to do (even an idle watcher will do..) \& ev_run (my_loop, 0); \& ... jobs done or somebody called break. yeah! .Ve .IP "ev_break (loop, how)" 4 .IX Item "ev_break (loop, how)" Can be used to make a call to \f(CW\*(C`ev_run\*(C'\fR return early (but only after it has processed all outstanding events). The \f(CW\*(C`how\*(C'\fR argument must be either \&\f(CW\*(C`EVBREAK_ONE\*(C'\fR, which will make the innermost \f(CW\*(C`ev_run\*(C'\fR call return, or \&\f(CW\*(C`EVBREAK_ALL\*(C'\fR, which will make all nested \f(CW\*(C`ev_run\*(C'\fR calls return. .Sp This \*(L"break state\*(R" will be cleared on the next call to \f(CW\*(C`ev_run\*(C'\fR. .Sp It is safe to call \f(CW\*(C`ev_break\*(C'\fR from outside any \f(CW\*(C`ev_run\*(C'\fR calls, too, in which case it will have no effect. .IP "ev_ref (loop)" 4 .IX Item "ev_ref (loop)" .PD 0 .IP "ev_unref (loop)" 4 .IX Item "ev_unref (loop)" .PD Ref/unref can be used to add or remove a reference count on the event loop: Every watcher keeps one reference, and as long as the reference count is nonzero, \f(CW\*(C`ev_run\*(C'\fR will not return on its own. .Sp This is useful when you have a watcher that you never intend to unregister, but that nevertheless should not keep \f(CW\*(C`ev_run\*(C'\fR from returning. In such a case, call \f(CW\*(C`ev_unref\*(C'\fR after starting, and \f(CW\*(C`ev_ref\*(C'\fR before stopping it. .Sp As an example, libev itself uses this for its internal signal pipe: It is not visible to the libev user and should not keep \f(CW\*(C`ev_run\*(C'\fR from exiting if no event watchers registered by it are active. It is also an excellent way to do this for generic recurring timers or from within third-party libraries. Just remember to \fIunref after start\fR and \fIref before stop\fR (but only if the watcher wasn't active before, or was active before, respectively. Note also that libev might stop watchers itself (e.g. non-repeating timers) in which case you have to \f(CW\*(C`ev_ref\*(C'\fR in the callback). .Sp Example: Create a signal watcher, but keep it from keeping \f(CW\*(C`ev_run\*(C'\fR running when nothing else is active. .Sp .Vb 4 \& ev_signal exitsig; \& ev_signal_init (&exitsig, sig_cb, SIGINT); \& ev_signal_start (loop, &exitsig); \& ev_unref (loop); .Ve .Sp Example: For some weird reason, unregister the above signal handler again. .Sp .Vb 2 \& ev_ref (loop); \& ev_signal_stop (loop, &exitsig); .Ve .IP "ev_set_io_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_io_collect_interval (loop, ev_tstamp interval)" .PD 0 .IP "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" .PD These advanced functions influence the time that libev will spend waiting for events. Both time intervals are by default \f(CW0\fR, meaning that libev will try to invoke timer/periodic callbacks and I/O callbacks with minimum latency. .Sp Setting these to a higher value (the \f(CW\*(C`interval\*(C'\fR \fImust\fR be >= \f(CW0\fR) allows libev to delay invocation of I/O and timer/periodic callbacks to increase efficiency of loop iterations (or to increase power-saving opportunities). .Sp The idea is that sometimes your program runs just fast enough to handle one (or very few) event(s) per loop iteration. While this makes the program responsive, it also wastes a lot of \s-1CPU\s0 time to poll for new events, especially with backends like \f(CW\*(C`select ()\*(C'\fR which have a high overhead for the actual polling but can deliver many events at once. .Sp By setting a higher \fIio collect interval\fR you allow libev to spend more time collecting I/O events, so you can handle more events per iteration, at the cost of increasing latency. Timeouts (both \f(CW\*(C`ev_periodic\*(C'\fR and \&\f(CW\*(C`ev_timer\*(C'\fR) will not be affected. Setting this to a non-null value will introduce an additional \f(CW\*(C`ev_sleep ()\*(C'\fR call into most loop iterations. The sleep time ensures that libev will not poll for I/O events more often then once per this interval, on average (as long as the host time resolution is good enough). .Sp Likewise, by setting a higher \fItimeout collect interval\fR you allow libev to spend more time collecting timeouts, at the expense of increased latency/jitter/inexactness (the watcher callback will be called later). \f(CW\*(C`ev_io\*(C'\fR watchers will not be affected. Setting this to a non-null value will not introduce any overhead in libev. .Sp Many (busy) programs can usually benefit by setting the I/O collect interval to a value near \f(CW0.1\fR or so, which is often enough for interactive servers (of course not for games), likewise for timeouts. It usually doesn't make much sense to set it to a lower value than \f(CW0.01\fR, as this approaches the timing granularity of most systems. Note that if you do transactions with the outside world and you can't increase the parallelity, then this setting will limit your transaction rate (if you need to poll once per transaction and the I/O collect interval is 0.01, then you can't do more than 100 transactions per second). .Sp Setting the \fItimeout collect interval\fR can improve the opportunity for saving power, as the program will \*(L"bundle\*(R" timer callback invocations that are \*(L"near\*(R" in time together, by delaying some, thus reducing the number of times the process sleeps and wakes up again. Another useful technique to reduce iterations/wake\-ups is to use \f(CW\*(C`ev_periodic\*(C'\fR watchers and make sure they fire on, say, one-second boundaries only. .Sp Example: we only need 0.1s timeout granularity, and we wish not to poll more often than 100 times per second: .Sp .Vb 2 \& ev_set_timeout_collect_interval (EV_DEFAULT_UC_ 0.1); \& ev_set_io_collect_interval (EV_DEFAULT_UC_ 0.01); .Ve .IP "ev_invoke_pending (loop)" 4 .IX Item "ev_invoke_pending (loop)" This call will simply invoke all pending watchers while resetting their pending state. Normally, \f(CW\*(C`ev_run\*(C'\fR does this automatically when required, but when overriding the invoke callback this call comes handy. This function can be invoked from a watcher \- this can be useful for example when you want to do some lengthy calculation and want to pass further event handling to another thread (you still have to make sure only one thread executes within \f(CW\*(C`ev_invoke_pending\*(C'\fR or \f(CW\*(C`ev_run\*(C'\fR of course). .IP "int ev_pending_count (loop)" 4 .IX Item "int ev_pending_count (loop)" Returns the number of pending watchers \- zero indicates that no watchers are pending. .IP "ev_set_invoke_pending_cb (loop, void (*invoke_pending_cb)(\s-1EV_P\s0))" 4 .IX Item "ev_set_invoke_pending_cb (loop, void (*invoke_pending_cb)(EV_P))" This overrides the invoke pending functionality of the loop: Instead of invoking all pending watchers when there are any, \f(CW\*(C`ev_run\*(C'\fR will call this callback instead. This is useful, for example, when you want to invoke the actual watchers inside another context (another thread etc.). .Sp If you want to reset the callback, use \f(CW\*(C`ev_invoke_pending\*(C'\fR as new callback. .IP "ev_set_loop_release_cb (loop, void (*release)(\s-1EV_P\s0) throw (), void (*acquire)(\s-1EV_P\s0) throw ())" 4 .IX Item "ev_set_loop_release_cb (loop, void (*release)(EV_P) throw (), void (*acquire)(EV_P) throw ())" Sometimes you want to share the same loop between multiple threads. This can be done relatively simply by putting mutex_lock/unlock calls around each call to a libev function. .Sp However, \f(CW\*(C`ev_run\*(C'\fR can run an indefinite time, so it is not feasible to wait for it to return. One way around this is to wake up the event loop via \f(CW\*(C`ev_break\*(C'\fR and \f(CW\*(C`ev_async_send\*(C'\fR, another way is to set these \&\fIrelease\fR and \fIacquire\fR callbacks on the loop. .Sp When set, then \f(CW\*(C`release\*(C'\fR will be called just before the thread is suspended waiting for new events, and \f(CW\*(C`acquire\*(C'\fR is called just afterwards. .Sp Ideally, \f(CW\*(C`release\*(C'\fR will just call your mutex_unlock function, and \&\f(CW\*(C`acquire\*(C'\fR will just call the mutex_lock function again. .Sp While event loop modifications are allowed between invocations of \&\f(CW\*(C`release\*(C'\fR and \f(CW\*(C`acquire\*(C'\fR (that's their only purpose after all), no modifications done will affect the event loop, i.e. adding watchers will have no effect on the set of file descriptors being watched, or the time waited. Use an \f(CW\*(C`ev_async\*(C'\fR watcher to wake up \f(CW\*(C`ev_run\*(C'\fR when you want it to take note of any changes you made. .Sp In theory, threads executing \f(CW\*(C`ev_run\*(C'\fR will be async-cancel safe between invocations of \f(CW\*(C`release\*(C'\fR and \f(CW\*(C`acquire\*(C'\fR. .Sp See also the locking example in the \f(CW\*(C`THREADS\*(C'\fR section later in this document. .IP "ev_set_userdata (loop, void *data)" 4 .IX Item "ev_set_userdata (loop, void *data)" .PD 0 .IP "void *ev_userdata (loop)" 4 .IX Item "void *ev_userdata (loop)" .PD Set and retrieve a single \f(CW\*(C`void *\*(C'\fR associated with a loop. When \&\f(CW\*(C`ev_set_userdata\*(C'\fR has never been called, then \f(CW\*(C`ev_userdata\*(C'\fR returns \&\f(CW0\fR. .Sp These two functions can be used to associate arbitrary data with a loop, and are intended solely for the \f(CW\*(C`invoke_pending_cb\*(C'\fR, \f(CW\*(C`release\*(C'\fR and \&\f(CW\*(C`acquire\*(C'\fR callbacks described above, but of course can be (ab\-)used for any other purpose as well. .IP "ev_verify (loop)" 4 .IX Item "ev_verify (loop)" This function only does something when \f(CW\*(C`EV_VERIFY\*(C'\fR support has been compiled in, which is the default for non-minimal builds. It tries to go through all internal structures and checks them for validity. If anything is found to be inconsistent, it will print an error message to standard error and call \f(CW\*(C`abort ()\*(C'\fR. .Sp This can be used to catch bugs inside libev itself: under normal circumstances, this function will never abort as of course libev keeps its data structures consistent. .SH "ANATOMY OF A WATCHER" .IX Header "ANATOMY OF A WATCHER" In the following description, uppercase \f(CW\*(C`TYPE\*(C'\fR in names stands for the watcher type, e.g. \f(CW\*(C`ev_TYPE_start\*(C'\fR can mean \f(CW\*(C`ev_timer_start\*(C'\fR for timer watchers and \f(CW\*(C`ev_io_start\*(C'\fR for I/O watchers. .PP A watcher is an opaque structure that you allocate and register to record your interest in some event. To make a concrete example, imagine you want to wait for \s-1STDIN\s0 to become readable, you would create an \f(CW\*(C`ev_io\*(C'\fR watcher for that: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& ev_io_stop (w); \& ev_break (loop, EVBREAK_ALL); \& } \& \& struct ev_loop *loop = ev_default_loop (0); \& \& ev_io stdin_watcher; \& \& ev_init (&stdin_watcher, my_cb); \& ev_io_set (&stdin_watcher, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& \& ev_run (loop, 0); .Ve .PP As you can see, you are responsible for allocating the memory for your watcher structures (and it is \fIusually\fR a bad idea to do this on the stack). .PP Each watcher has an associated watcher structure (called \f(CW\*(C`struct ev_TYPE\*(C'\fR or simply \f(CW\*(C`ev_TYPE\*(C'\fR, as typedefs are provided for all watcher structs). .PP Each watcher structure must be initialised by a call to \f(CW\*(C`ev_init (watcher *, callback)\*(C'\fR, which expects a callback to be provided. This callback is invoked each time the event occurs (or, in the case of I/O watchers, each time the event loop detects that the file descriptor given is readable and/or writable). .PP Each watcher type further has its own \f(CW\*(C`ev_TYPE_set (watcher *, ...)\*(C'\fR macro to configure it, with arguments specific to the watcher type. There is also a macro to combine initialisation and setting in one call: \f(CW\*(C`ev_TYPE_init (watcher *, callback, ...)\*(C'\fR. .PP To make the watcher actually watch out for events, you have to start it with a watcher-specific start function (\f(CW\*(C`ev_TYPE_start (loop, watcher *)\*(C'\fR), and you can stop watching for events at any time by calling the corresponding stop function (\f(CW\*(C`ev_TYPE_stop (loop, watcher *)\*(C'\fR. .PP As long as your watcher is active (has been started but not stopped) you must not touch the values stored in it. Most specifically you must never reinitialise it or call its \f(CW\*(C`ev_TYPE_set\*(C'\fR macro. .PP Each and every callback receives the event loop pointer as first, the registered watcher structure as second, and a bitset of received events as third argument. .PP The received events usually include a single bit per event type received (you can receive multiple events at the same time). The possible bit masks are: .ie n .IP """EV_READ""" 4 .el .IP "\f(CWEV_READ\fR" 4 .IX Item "EV_READ" .PD 0 .ie n .IP """EV_WRITE""" 4 .el .IP "\f(CWEV_WRITE\fR" 4 .IX Item "EV_WRITE" .PD The file descriptor in the \f(CW\*(C`ev_io\*(C'\fR watcher has become readable and/or writable. .ie n .IP """EV_TIMER""" 4 .el .IP "\f(CWEV_TIMER\fR" 4 .IX Item "EV_TIMER" The \f(CW\*(C`ev_timer\*(C'\fR watcher has timed out. .ie n .IP """EV_PERIODIC""" 4 .el .IP "\f(CWEV_PERIODIC\fR" 4 .IX Item "EV_PERIODIC" The \f(CW\*(C`ev_periodic\*(C'\fR watcher has timed out. .ie n .IP """EV_SIGNAL""" 4 .el .IP "\f(CWEV_SIGNAL\fR" 4 .IX Item "EV_SIGNAL" The signal specified in the \f(CW\*(C`ev_signal\*(C'\fR watcher has been received by a thread. .ie n .IP """EV_CHILD""" 4 .el .IP "\f(CWEV_CHILD\fR" 4 .IX Item "EV_CHILD" The pid specified in the \f(CW\*(C`ev_child\*(C'\fR watcher has received a status change. .ie n .IP """EV_STAT""" 4 .el .IP "\f(CWEV_STAT\fR" 4 .IX Item "EV_STAT" The path specified in the \f(CW\*(C`ev_stat\*(C'\fR watcher changed its attributes somehow. .ie n .IP """EV_IDLE""" 4 .el .IP "\f(CWEV_IDLE\fR" 4 .IX Item "EV_IDLE" The \f(CW\*(C`ev_idle\*(C'\fR watcher has determined that you have nothing better to do. .ie n .IP """EV_PREPARE""" 4 .el .IP "\f(CWEV_PREPARE\fR" 4 .IX Item "EV_PREPARE" .PD 0 .ie n .IP """EV_CHECK""" 4 .el .IP "\f(CWEV_CHECK\fR" 4 .IX Item "EV_CHECK" .PD All \f(CW\*(C`ev_prepare\*(C'\fR watchers are invoked just \fIbefore\fR \f(CW\*(C`ev_run\*(C'\fR starts to gather new events, and all \f(CW\*(C`ev_check\*(C'\fR watchers are queued (not invoked) just after \f(CW\*(C`ev_run\*(C'\fR has gathered them, but before it queues any callbacks for any received events. That means \f(CW\*(C`ev_prepare\*(C'\fR watchers are the last watchers invoked before the event loop sleeps or polls for new events, and \&\f(CW\*(C`ev_check\*(C'\fR watchers will be invoked before any other watchers of the same or lower priority within an event loop iteration. .Sp Callbacks of both watcher types can start and stop as many watchers as they want, and all of them will be taken into account (for example, a \&\f(CW\*(C`ev_prepare\*(C'\fR watcher might start an idle watcher to keep \f(CW\*(C`ev_run\*(C'\fR from blocking). .ie n .IP """EV_EMBED""" 4 .el .IP "\f(CWEV_EMBED\fR" 4 .IX Item "EV_EMBED" The embedded event loop specified in the \f(CW\*(C`ev_embed\*(C'\fR watcher needs attention. .ie n .IP """EV_FORK""" 4 .el .IP "\f(CWEV_FORK\fR" 4 .IX Item "EV_FORK" The event loop has been resumed in the child process after fork (see \&\f(CW\*(C`ev_fork\*(C'\fR). .ie n .IP """EV_CLEANUP""" 4 .el .IP "\f(CWEV_CLEANUP\fR" 4 .IX Item "EV_CLEANUP" The event loop is about to be destroyed (see \f(CW\*(C`ev_cleanup\*(C'\fR). .ie n .IP """EV_ASYNC""" 4 .el .IP "\f(CWEV_ASYNC\fR" 4 .IX Item "EV_ASYNC" The given async watcher has been asynchronously notified (see \f(CW\*(C`ev_async\*(C'\fR). .ie n .IP """EV_CUSTOM""" 4 .el .IP "\f(CWEV_CUSTOM\fR" 4 .IX Item "EV_CUSTOM" Not ever sent (or otherwise used) by libev itself, but can be freely used by libev users to signal watchers (e.g. via \f(CW\*(C`ev_feed_event\*(C'\fR). .ie n .IP """EV_ERROR""" 4 .el .IP "\f(CWEV_ERROR\fR" 4 .IX Item "EV_ERROR" An unspecified error has occurred, the watcher has been stopped. This might happen because the watcher could not be properly started because libev ran out of memory, a file descriptor was found to be closed or any other problem. Libev considers these application bugs. .Sp You best act on it by reporting the problem and somehow coping with the watcher being stopped. Note that well-written programs should not receive an error ever, so when your watcher receives it, this usually indicates a bug in your program. .Sp Libev will usually signal a few \*(L"dummy\*(R" events together with an error, for example it might indicate that a fd is readable or writable, and if your callbacks is well-written it can just attempt the operation and cope with the error from \fIread()\fR or \fIwrite()\fR. This will not work in multi-threaded programs, though, as the fd could already be closed and reused for another thing, so beware. .SS "\s-1GENERIC WATCHER FUNCTIONS\s0" .IX Subsection "GENERIC WATCHER FUNCTIONS" .ie n .IP """ev_init"" (ev_TYPE *watcher, callback)" 4 .el .IP "\f(CWev_init\fR (ev_TYPE *watcher, callback)" 4 .IX Item "ev_init (ev_TYPE *watcher, callback)" This macro initialises the generic portion of a watcher. The contents of the watcher object can be arbitrary (so \f(CW\*(C`malloc\*(C'\fR will do). Only the generic parts of the watcher are initialised, you \fIneed\fR to call the type-specific \f(CW\*(C`ev_TYPE_set\*(C'\fR macro afterwards to initialise the type-specific parts. For each type there is also a \f(CW\*(C`ev_TYPE_init\*(C'\fR macro which rolls both calls into one. .Sp You can reinitialise a watcher at any time as long as it has been stopped (or never started) and there are no pending events outstanding. .Sp The callback is always of type \f(CW\*(C`void (*)(struct ev_loop *loop, ev_TYPE *watcher, int revents)\*(C'\fR. .Sp Example: Initialise an \f(CW\*(C`ev_io\*(C'\fR watcher in two steps. .Sp .Vb 3 \& ev_io w; \& ev_init (&w, my_cb); \& ev_io_set (&w, STDIN_FILENO, EV_READ); .Ve .ie n .IP """ev_TYPE_set"" (ev_TYPE *watcher, [args])" 4 .el .IP "\f(CWev_TYPE_set\fR (ev_TYPE *watcher, [args])" 4 .IX Item "ev_TYPE_set (ev_TYPE *watcher, [args])" This macro initialises the type-specific parts of a watcher. You need to call \f(CW\*(C`ev_init\*(C'\fR at least once before you call this macro, but you can call \f(CW\*(C`ev_TYPE_set\*(C'\fR any number of times. You must not, however, call this macro on a watcher that is active (it can be pending, however, which is a difference to the \f(CW\*(C`ev_init\*(C'\fR macro). .Sp Although some watcher types do not have type-specific arguments (e.g. \f(CW\*(C`ev_prepare\*(C'\fR) you still need to call its \f(CW\*(C`set\*(C'\fR macro. .Sp See \f(CW\*(C`ev_init\*(C'\fR, above, for an example. .ie n .IP """ev_TYPE_init"" (ev_TYPE *watcher, callback, [args])" 4 .el .IP "\f(CWev_TYPE_init\fR (ev_TYPE *watcher, callback, [args])" 4 .IX Item "ev_TYPE_init (ev_TYPE *watcher, callback, [args])" This convenience macro rolls both \f(CW\*(C`ev_init\*(C'\fR and \f(CW\*(C`ev_TYPE_set\*(C'\fR macro calls into a single call. This is the most convenient method to initialise a watcher. The same limitations apply, of course. .Sp Example: Initialise and set an \f(CW\*(C`ev_io\*(C'\fR watcher in one step. .Sp .Vb 1 \& ev_io_init (&w, my_cb, STDIN_FILENO, EV_READ); .Ve .ie n .IP """ev_TYPE_start"" (loop, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_start\fR (loop, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_start (loop, ev_TYPE *watcher)" Starts (activates) the given watcher. Only active watchers will receive events. If the watcher is already active nothing will happen. .Sp Example: Start the \f(CW\*(C`ev_io\*(C'\fR watcher that is being abused as example in this whole section. .Sp .Vb 1 \& ev_io_start (EV_DEFAULT_UC, &w); .Ve .ie n .IP """ev_TYPE_stop"" (loop, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_stop\fR (loop, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_stop (loop, ev_TYPE *watcher)" Stops the given watcher if active, and clears the pending status (whether the watcher was active or not). .Sp It is possible that stopped watchers are pending \- for example, non-repeating timers are being stopped when they become pending \- but calling \f(CW\*(C`ev_TYPE_stop\*(C'\fR ensures that the watcher is neither active nor pending. If you want to free or reuse the memory used by the watcher it is therefore a good idea to always call its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. .IP "bool ev_is_active (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_active (ev_TYPE *watcher)" Returns a true value iff the watcher is active (i.e. it has been started and not yet been stopped). As long as a watcher is active you must not modify it. .IP "bool ev_is_pending (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_pending (ev_TYPE *watcher)" Returns a true value iff the watcher is pending, (i.e. it has outstanding events but its callback has not yet been invoked). As long as a watcher is pending (but not active) you must not call an init function on it (but \&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR it). .IP "callback ev_cb (ev_TYPE *watcher)" 4 .IX Item "callback ev_cb (ev_TYPE *watcher)" Returns the callback currently set on the watcher. .IP "ev_set_cb (ev_TYPE *watcher, callback)" 4 .IX Item "ev_set_cb (ev_TYPE *watcher, callback)" Change the callback. You can change the callback at virtually any time (modulo threads). .IP "ev_set_priority (ev_TYPE *watcher, int priority)" 4 .IX Item "ev_set_priority (ev_TYPE *watcher, int priority)" .PD 0 .IP "int ev_priority (ev_TYPE *watcher)" 4 .IX Item "int ev_priority (ev_TYPE *watcher)" .PD Set and query the priority of the watcher. The priority is a small integer between \f(CW\*(C`EV_MAXPRI\*(C'\fR (default: \f(CW2\fR) and \f(CW\*(C`EV_MINPRI\*(C'\fR (default: \f(CW\*(C`\-2\*(C'\fR). Pending watchers with higher priority will be invoked before watchers with lower priority, but priority will not keep watchers from being executed (except for \f(CW\*(C`ev_idle\*(C'\fR watchers). .Sp If you need to suppress invocation when higher priority events are pending you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. .Sp You \fImust not\fR change the priority of a watcher as long as it is active or pending. .Sp Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is fine, as long as you do not mind that the priority value you query might or might not have been clamped to the valid range. .Sp The default priority used by watchers when no priority has been set is always \f(CW0\fR, which is supposed to not be too high and not be too low :). .Sp See \*(L"\s-1WATCHER PRIORITY MODELS\*(R"\s0, below, for a more thorough treatment of priorities. .IP "ev_invoke (loop, ev_TYPE *watcher, int revents)" 4 .IX Item "ev_invoke (loop, ev_TYPE *watcher, int revents)" Invoke the \f(CW\*(C`watcher\*(C'\fR with the given \f(CW\*(C`loop\*(C'\fR and \f(CW\*(C`revents\*(C'\fR. Neither \&\f(CW\*(C`loop\*(C'\fR nor \f(CW\*(C`revents\*(C'\fR need to be valid as long as the watcher callback can deal with that fact, as both are simply passed through to the callback. .IP "int ev_clear_pending (loop, ev_TYPE *watcher)" 4 .IX Item "int ev_clear_pending (loop, ev_TYPE *watcher)" If the watcher is pending, this function clears its pending status and returns its \f(CW\*(C`revents\*(C'\fR bitset (as if its callback was invoked). If the watcher isn't pending it does nothing and returns \f(CW0\fR. .Sp Sometimes it can be useful to \*(L"poll\*(R" a watcher instead of waiting for its callback to be invoked, which can be accomplished with this function. .IP "ev_feed_event (loop, ev_TYPE *watcher, int revents)" 4 .IX Item "ev_feed_event (loop, ev_TYPE *watcher, int revents)" Feeds the given event set into the event loop, as if the specified event had happened for the specified watcher (which must be a pointer to an initialised but not necessarily started event watcher). Obviously you must not free the watcher as long as it has pending events. .Sp Stopping the watcher, letting libev invoke it, or calling \&\f(CW\*(C`ev_clear_pending\*(C'\fR will clear the pending event, even if the watcher was not started in the first place. .Sp See also \f(CW\*(C`ev_feed_fd_event\*(C'\fR and \f(CW\*(C`ev_feed_signal_event\*(C'\fR for related functions that do not need a watcher. .PP See also the \*(L"\s-1ASSOCIATING CUSTOM DATA WITH A WATCHER\*(R"\s0 and \*(L"\s-1BUILDING YOUR OWN COMPOSITE WATCHERS\*(R"\s0 idioms. .SS "\s-1WATCHER STATES\s0" .IX Subsection "WATCHER STATES" There are various watcher states mentioned throughout this manual \- active, pending and so on. In this section these states and the rules to transition between them will be described in more detail \- and while these rules might look complicated, they usually do \*(L"the right thing\*(R". .IP "initialised" 4 .IX Item "initialised" Before a watcher can be registered with the event loop it has to be initialised. This can be done with a call to \f(CW\*(C`ev_TYPE_init\*(C'\fR, or calls to \&\f(CW\*(C`ev_init\*(C'\fR followed by the watcher-specific \f(CW\*(C`ev_TYPE_set\*(C'\fR function. .Sp In this state it is simply some block of memory that is suitable for use in an event loop. It can be moved around, freed, reused etc. at will \- as long as you either keep the memory contents intact, or call \&\f(CW\*(C`ev_TYPE_init\*(C'\fR again. .IP "started/running/active" 4 .IX Item "started/running/active" Once a watcher has been started with a call to \f(CW\*(C`ev_TYPE_start\*(C'\fR it becomes property of the event loop, and is actively waiting for events. While in this state it cannot be accessed (except in a few documented ways), moved, freed or anything else \- the only legal thing is to keep a pointer to it, and call libev functions on it that are documented to work on active watchers. .IP "pending" 4 .IX Item "pending" If a watcher is active and libev determines that an event it is interested in has occurred (such as a timer expiring), it will become pending. It will stay in this pending state until either it is stopped or its callback is about to be invoked, so it is not normally pending inside the watcher callback. .Sp The watcher might or might not be active while it is pending (for example, an expired non-repeating timer can be pending but no longer active). If it is stopped, it can be freely accessed (e.g. by calling \f(CW\*(C`ev_TYPE_set\*(C'\fR), but it is still property of the event loop at this time, so cannot be moved, freed or reused. And if it is active the rules described in the previous item still apply. .Sp It is also possible to feed an event on a watcher that is not active (e.g. via \f(CW\*(C`ev_feed_event\*(C'\fR), in which case it becomes pending without being active. .IP "stopped" 4 .IX Item "stopped" A watcher can be stopped implicitly by libev (in which case it might still be pending), or explicitly by calling its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. The latter will clear any pending state the watcher might be in, regardless of whether it was active or not, so stopping a watcher explicitly before freeing it is often a good idea. .Sp While stopped (and not pending) the watcher is essentially in the initialised state, that is, it can be reused, moved, modified in any way you wish (but when you trash the memory block, you need to \f(CW\*(C`ev_TYPE_init\*(C'\fR it again). .SS "\s-1WATCHER PRIORITY MODELS\s0" .IX Subsection "WATCHER PRIORITY MODELS" Many event loops support \fIwatcher priorities\fR, which are usually small integers that influence the ordering of event callback invocation between watchers in some way, all else being equal. .PP In libev, Watcher priorities can be set using \f(CW\*(C`ev_set_priority\*(C'\fR. See its description for the more technical details such as the actual priority range. .PP There are two common ways how these these priorities are being interpreted by event loops: .PP In the more common lock-out model, higher priorities \*(L"lock out\*(R" invocation of lower priority watchers, which means as long as higher priority watchers receive events, lower priority watchers are not being invoked. .PP The less common only-for-ordering model uses priorities solely to order callback invocation within a single event loop iteration: Higher priority watchers are invoked before lower priority ones, but they all get invoked before polling for new events. .PP Libev uses the second (only-for-ordering) model for all its watchers except for idle watchers (which use the lock-out model). .PP The rationale behind this is that implementing the lock-out model for watchers is not well supported by most kernel interfaces, and most event libraries will just poll for the same events again and again as long as their callbacks have not been executed, which is very inefficient in the common case of one high-priority watcher locking out a mass of lower priority ones. .PP Static (ordering) priorities are most useful when you have two or more watchers handling the same resource: a typical usage example is having an \&\f(CW\*(C`ev_io\*(C'\fR watcher to receive data, and an associated \f(CW\*(C`ev_timer\*(C'\fR to handle timeouts. Under load, data might be received while the program handles other jobs, but since timers normally get invoked first, the timeout handler will be executed before checking for data. In that case, giving the timer a lower priority than the I/O watcher ensures that I/O will be handled first even under adverse conditions (which is usually, but not always, what you want). .PP Since idle watchers use the \*(L"lock-out\*(R" model, meaning that idle watchers will only be executed when no same or higher priority watchers have received events, they can be used to implement the \*(L"lock-out\*(R" model when required. .PP For example, to emulate how many other event libraries handle priorities, you can associate an \f(CW\*(C`ev_idle\*(C'\fR watcher to each such watcher, and in the normal watcher callback, you just start the idle watcher. The real processing is done in the idle watcher callback. This causes libev to continuously poll and process kernel event data for the watcher, but when the lock-out case is known to be rare (which in turn is rare :), this is workable. .PP Usually, however, the lock-out model implemented that way will perform miserably under the type of load it was designed to handle. In that case, it might be preferable to stop the real watcher before starting the idle watcher, so the kernel will not have to process the event in case the actual processing will be delayed for considerable time. .PP Here is an example of an I/O watcher that should run at a strictly lower priority than the default, and which should only process data when no other events are pending: .PP .Vb 2 \& ev_idle idle; // actual processing watcher \& ev_io io; // actual event watcher \& \& static void \& io_cb (EV_P_ ev_io *w, int revents) \& { \& // stop the I/O watcher, we received the event, but \& // are not yet ready to handle it. \& ev_io_stop (EV_A_ w); \& \& // start the idle watcher to handle the actual event. \& // it will not be executed as long as other watchers \& // with the default priority are receiving events. \& ev_idle_start (EV_A_ &idle); \& } \& \& static void \& idle_cb (EV_P_ ev_idle *w, int revents) \& { \& // actual processing \& read (STDIN_FILENO, ...); \& \& // have to start the I/O watcher again, as \& // we have handled the event \& ev_io_start (EV_P_ &io); \& } \& \& // initialisation \& ev_idle_init (&idle, idle_cb); \& ev_io_init (&io, io_cb, STDIN_FILENO, EV_READ); \& ev_io_start (EV_DEFAULT_ &io); .Ve .PP In the \*(L"real\*(R" world, it might also be beneficial to start a timer, so that low-priority connections can not be locked out forever under load. This enables your program to keep a lower latency for important connections during short periods of high load, while not completely locking out less important ones. .SH "WATCHER TYPES" .IX Header "WATCHER TYPES" This section describes each watcher in detail, but will not repeat information given in the last section. Any initialisation/set macros, functions and members specific to the watcher type are explained. .PP Members are additionally marked with either \fI[read\-only]\fR, meaning that, while the watcher is active, you can look at the member and expect some sensible content, but you must not modify it (you can modify it while the watcher is stopped to your hearts content), or \fI[read\-write]\fR, which means you can expect it to have some sensible content while the watcher is active, but you can also modify it. Modifying it may not do something sensible or take immediate effect (or do anything at all), but libev will not crash or malfunction in any way. .ie n .SS """ev_io"" \- is this file descriptor readable or writable?" .el .SS "\f(CWev_io\fP \- is this file descriptor readable or writable?" .IX Subsection "ev_io - is this file descriptor readable or writable?" I/O watchers check whether a file descriptor is readable or writable in each iteration of the event loop, or, more precisely, when reading would not block the process and writing would at least be able to write some data. This behaviour is called level-triggering because you keep receiving events as long as the condition persists. Remember you can stop the watcher if you don't want to act on the event and neither want to receive future events. .PP In general you can register as many read and/or write event watchers per fd as you want (as long as you don't confuse yourself). Setting all file descriptors to non-blocking mode is also usually a good idea (but not required if you know what you are doing). .PP Another thing you have to watch out for is that it is quite easy to receive \*(L"spurious\*(R" readiness notifications, that is, your callback might be called with \f(CW\*(C`EV_READ\*(C'\fR but a subsequent \f(CW\*(C`read\*(C'\fR(2) will actually block because there is no data. It is very easy to get into this situation even with a relatively standard program structure. Thus it is best to always use non-blocking I/O: An extra \f(CW\*(C`read\*(C'\fR(2) returning \f(CW\*(C`EAGAIN\*(C'\fR is far preferable to a program hanging until some data arrives. .PP If you cannot run the fd in non-blocking mode (for example you should not play around with an Xlib connection), then you have to separately re-test whether a file descriptor is really ready with a known-to-be good interface such as poll (fortunately in the case of Xlib, it already does this on its own, so its quite safe to use). Some people additionally use \f(CW\*(C`SIGALRM\*(C'\fR and an interval timer, just to be sure you won't block indefinitely. .PP But really, best use non-blocking mode. .PP \fIThe special problem of disappearing file descriptors\fR .IX Subsection "The special problem of disappearing file descriptors" .PP Some backends (e.g. kqueue, epoll) need to be told about closing a file descriptor (either due to calling \f(CW\*(C`close\*(C'\fR explicitly or any other means, such as \f(CW\*(C`dup2\*(C'\fR). The reason is that you register interest in some file descriptor, but when it goes away, the operating system will silently drop this interest. If another file descriptor with the same number then is registered with libev, there is no efficient way to see that this is, in fact, a different file descriptor. .PP To avoid having to explicitly tell libev about such cases, libev follows the following policy: Each time \f(CW\*(C`ev_io_set\*(C'\fR is being called, libev will assume that this is potentially a new file descriptor, otherwise it is assumed that the file descriptor stays the same. That means that you \fIhave\fR to call \f(CW\*(C`ev_io_set\*(C'\fR (or \f(CW\*(C`ev_io_init\*(C'\fR) when you change the descriptor even if the file descriptor number itself did not change. .PP This is how one would do it normally anyway, the important point is that the libev application should not optimise around libev but should leave optimisations to libev. .PP \fIThe special problem of dup'ed file descriptors\fR .IX Subsection "The special problem of dup'ed file descriptors" .PP Some backends (e.g. epoll), cannot register events for file descriptors, but only events for the underlying file descriptions. That means when you have \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors or weirder constellations, and register events for them, only one file descriptor might actually receive events. .PP There is no workaround possible except not registering events for potentially \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors, or to resort to \&\f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of files\fR .IX Subsection "The special problem of files" .PP Many people try to use \f(CW\*(C`select\*(C'\fR (or libev) on file descriptors representing files, and expect it to become ready when their program doesn't block on disk accesses (which can take a long time on their own). .PP However, this cannot ever work in the \*(L"expected\*(R" way \- you get a readiness notification as soon as the kernel knows whether and how much data is there, and in the case of open files, that's always the case, so you always get a readiness notification instantly, and your read (or possibly write) will still block on the disk I/O. .PP Another way to view it is that in the case of sockets, pipes, character devices and so on, there is another party (the sender) that delivers data on its own, but in the case of files, there is no such thing: the disk will not send data on its own, simply because it doesn't know what you wish to read \- you would first have to request some data. .PP Since files are typically not-so-well supported by advanced notification mechanism, libev tries hard to emulate \s-1POSIX\s0 behaviour with respect to files, even though you should not use it. The reason for this is convenience: sometimes you want to watch \s-1STDIN\s0 or \s-1STDOUT,\s0 which is usually a tty, often a pipe, but also sometimes files or special devices (for example, \f(CW\*(C`epoll\*(C'\fR on Linux works with \fI/dev/random\fR but not with \&\fI/dev/urandom\fR), and even though the file might better be served with asynchronous I/O instead of with non-blocking I/O, it is still useful when it \*(L"just works\*(R" instead of freezing. .PP So avoid file descriptors pointing to files when you know it (e.g. use libeio), but use them when it is convenient, e.g. for \s-1STDIN/STDOUT,\s0 or when you rarely read from a file instead of from a socket, and want to reuse the same code path. .PP \fIThe special problem of fork\fR .IX Subsection "The special problem of fork" .PP Some backends (epoll, kqueue) do not support \f(CW\*(C`fork ()\*(C'\fR at all or exhibit useless behaviour. Libev fully supports fork, but needs to be told about it in the child if you want to continue to use it in the child. .PP To support fork in your child processes, you have to call \f(CW\*(C`ev_loop_fork ()\*(C'\fR after a fork in the child, enable \f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR, or resort to \&\f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of \s-1SIGPIPE\s0\fR .IX Subsection "The special problem of SIGPIPE" .PP While not really specific to libev, it is easy to forget about \f(CW\*(C`SIGPIPE\*(C'\fR: when writing to a pipe whose other end has been closed, your program gets sent a \s-1SIGPIPE,\s0 which, by default, aborts your program. For most programs this is sensible behaviour, for daemons, this is usually undesirable. .PP So when you encounter spurious, unexplained daemon exits, make sure you ignore \s-1SIGPIPE \s0(and maybe make sure you log the exit status of your daemon somewhere, as that would have given you a big clue). .PP \fIThe special problem of \fIaccept()\fIing when you can't\fR .IX Subsection "The special problem of accept()ing when you can't" .PP Many implementations of the \s-1POSIX \s0\f(CW\*(C`accept\*(C'\fR function (for example, found in post\-2004 Linux) have the peculiar behaviour of not removing a connection from the pending queue in all error cases. .PP For example, larger servers often run out of file descriptors (because of resource limits), causing \f(CW\*(C`accept\*(C'\fR to fail with \f(CW\*(C`ENFILE\*(C'\fR but not rejecting the connection, leading to libev signalling readiness on the next iteration again (the connection still exists after all), and typically causing the program to loop at 100% \s-1CPU\s0 usage. .PP Unfortunately, the set of errors that cause this issue differs between operating systems, there is usually little the app can do to remedy the situation, and no known thread-safe method of removing the connection to cope with overload is known (to me). .PP One of the easiest ways to handle this situation is to just ignore it \&\- when the program encounters an overload, it will just loop until the situation is over. While this is a form of busy waiting, no \s-1OS\s0 offers an event-based way to handle this situation, so it's the best one can do. .PP A better way to handle the situation is to log any errors other than \&\f(CW\*(C`EAGAIN\*(C'\fR and \f(CW\*(C`EWOULDBLOCK\*(C'\fR, making sure not to flood the log with such messages, and continue as usual, which at least gives the user an idea of what could be wrong (\*(L"raise the ulimit!\*(R"). For extra points one could stop the \f(CW\*(C`ev_io\*(C'\fR watcher on the listening fd \*(L"for a while\*(R", which reduces \s-1CPU\s0 usage. .PP If your program is single-threaded, then you could also keep a dummy file descriptor for overload situations (e.g. by opening \fI/dev/null\fR), and when you run into \f(CW\*(C`ENFILE\*(C'\fR or \f(CW\*(C`EMFILE\*(C'\fR, close it, run \f(CW\*(C`accept\*(C'\fR, close that fd, and create a new dummy fd. This will gracefully refuse clients under typical overload conditions. .PP The last way to handle it is to simply log the error and \f(CW\*(C`exit\*(C'\fR, as is often done with \f(CW\*(C`malloc\*(C'\fR failures, but this results in an easy opportunity for a DoS attack. .PP \fIWatcher-Specific Functions\fR .IX Subsection "Watcher-Specific Functions" .IP "ev_io_init (ev_io *, callback, int fd, int events)" 4 .IX Item "ev_io_init (ev_io *, callback, int fd, int events)" .PD 0 .IP "ev_io_set (ev_io *, int fd, int events)" 4 .IX Item "ev_io_set (ev_io *, int fd, int events)" .PD Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to receive events for and \f(CW\*(C`events\*(C'\fR is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR, to express the desire to receive the given events. .IP "int fd [read\-only]" 4 .IX Item "int fd [read-only]" The file descriptor being watched. .IP "int events [read\-only]" 4 .IX Item "int events [read-only]" The events being watched. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well readable, but only once. Since it is likely line-buffered, you could attempt to read a whole line in the callback. .PP .Vb 6 \& static void \& stdin_readable_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& ev_io_stop (loop, w); \& .. read from stdin here (or from w\->fd) and handle any I/O errors \& } \& \& ... \& struct ev_loop *loop = ev_default_init (0); \& ev_io stdin_readable; \& ev_io_init (&stdin_readable, stdin_readable_cb, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_readable); \& ev_run (loop, 0); .Ve .ie n .SS """ev_timer"" \- relative and optionally repeating timeouts" .el .SS "\f(CWev_timer\fP \- relative and optionally repeating timeouts" .IX Subsection "ev_timer - relative and optionally repeating timeouts" Timer watchers are simple relative timers that generate an event after a given time, and optionally repeating in regular intervals after that. .PP The timers are based on real time, that is, if you register an event that times out after an hour and you reset your system clock to January last year, it will still time out after (roughly) one hour. \*(L"Roughly\*(R" because detecting time jumps is hard, and some inaccuracies are unavoidable (the monotonic clock option helps a lot here). .PP The callback is guaranteed to be invoked only \fIafter\fR its timeout has passed (not \fIat\fR, so on systems with very low-resolution clocks this might introduce a small delay, see \*(L"the special problem of being too early\*(R", below). If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones of the same priority with later time-out values (but this is no longer true when a callback calls \f(CW\*(C`ev_run\*(C'\fR recursively). .PP \fIBe smart about timeouts\fR .IX Subsection "Be smart about timeouts" .PP Many real-world problems involve some kind of timeout, usually for error recovery. A typical example is an \s-1HTTP\s0 request \- if the other side hangs, you want to raise some error after a while. .PP What follows are some ways to handle this problem, from obvious and inefficient to smart and efficient. .PP In the following, a 60 second activity timeout is assumed \- a timeout that gets reset to 60 seconds each time there is activity (e.g. each time some data or other life sign was received). .IP "1. Use a timer and stop, reinitialise and start it on activity." 4 .IX Item "1. Use a timer and stop, reinitialise and start it on activity." This is the most obvious, but not the most simple way: In the beginning, start the watcher: .Sp .Vb 2 \& ev_timer_init (timer, callback, 60., 0.); \& ev_timer_start (loop, timer); .Ve .Sp Then, each time there is some activity, \f(CW\*(C`ev_timer_stop\*(C'\fR it, initialise it and start it again: .Sp .Vb 3 \& ev_timer_stop (loop, timer); \& ev_timer_set (timer, 60., 0.); \& ev_timer_start (loop, timer); .Ve .Sp This is relatively simple to implement, but means that each time there is some activity, libev will first have to remove the timer from its internal data structure and then add it again. Libev tries to be fast, but it's still not a constant-time operation. .ie n .IP "2. Use a timer and re-start it with ""ev_timer_again"" inactivity." 4 .el .IP "2. Use a timer and re-start it with \f(CWev_timer_again\fR inactivity." 4 .IX Item "2. Use a timer and re-start it with ev_timer_again inactivity." This is the easiest way, and involves using \f(CW\*(C`ev_timer_again\*(C'\fR instead of \&\f(CW\*(C`ev_timer_start\*(C'\fR. .Sp To implement this, configure an \f(CW\*(C`ev_timer\*(C'\fR with a \f(CW\*(C`repeat\*(C'\fR value of \f(CW60\fR and then call \f(CW\*(C`ev_timer_again\*(C'\fR at start and each time you successfully read or write some data. If you go into an idle state where you do not expect data to travel on the socket, you can \f(CW\*(C`ev_timer_stop\*(C'\fR the timer, and \f(CW\*(C`ev_timer_again\*(C'\fR will automatically restart it if need be. .Sp That means you can ignore both the \f(CW\*(C`ev_timer_start\*(C'\fR function and the \&\f(CW\*(C`after\*(C'\fR argument to \f(CW\*(C`ev_timer_set\*(C'\fR, and only ever use the \f(CW\*(C`repeat\*(C'\fR member and \f(CW\*(C`ev_timer_again\*(C'\fR. .Sp At start: .Sp .Vb 3 \& ev_init (timer, callback); \& timer\->repeat = 60.; \& ev_timer_again (loop, timer); .Ve .Sp Each time there is some activity: .Sp .Vb 1 \& ev_timer_again (loop, timer); .Ve .Sp It is even possible to change the time-out on the fly, regardless of whether the watcher is active or not: .Sp .Vb 2 \& timer\->repeat = 30.; \& ev_timer_again (loop, timer); .Ve .Sp This is slightly more efficient then stopping/starting the timer each time you want to modify its timeout value, as libev does not have to completely remove and re-insert the timer from/into its internal data structure. .Sp It is, however, even simpler than the \*(L"obvious\*(R" way to do it. .IP "3. Let the timer time out, but then re-arm it as required." 4 .IX Item "3. Let the timer time out, but then re-arm it as required." This method is more tricky, but usually most efficient: Most timeouts are relatively long compared to the intervals between other activity \- in our example, within 60 seconds, there are usually many I/O events with associated activity resets. .Sp In this case, it would be more efficient to leave the \f(CW\*(C`ev_timer\*(C'\fR alone, but remember the time of last activity, and check for a real timeout only within the callback: .Sp .Vb 3 \& ev_tstamp timeout = 60.; \& ev_tstamp last_activity; // time of last activity \& ev_timer timer; \& \& static void \& callback (EV_P_ ev_timer *w, int revents) \& { \& // calculate when the timeout would happen \& ev_tstamp after = last_activity \- ev_now (EV_A) + timeout; \& \& // if negative, it means we the timeout already occurred \& if (after < 0.) \& { \& // timeout occurred, take action \& } \& else \& { \& // callback was invoked, but there was some recent \& // activity. simply restart the timer to time out \& // after "after" seconds, which is the earliest time \& // the timeout can occur. \& ev_timer_set (w, after, 0.); \& ev_timer_start (EV_A_ w); \& } \& } .Ve .Sp To summarise the callback: first calculate in how many seconds the timeout will occur (by calculating the absolute time when it would occur, \&\f(CW\*(C`last_activity + timeout\*(C'\fR, and subtracting the current time, \f(CW\*(C`ev_now (EV_A)\*(C'\fR from that). .Sp If this value is negative, then we are already past the timeout, i.e. we timed out, and need to do whatever is needed in this case. .Sp Otherwise, we now the earliest time at which the timeout would trigger, and simply start the timer with this timeout value. .Sp In other words, each time the callback is invoked it will check whether the timeout occurred. If not, it will simply reschedule itself to check again at the earliest time it could time out. Rinse. Repeat. .Sp This scheme causes more callback invocations (about one every 60 seconds minus half the average time between activity), but virtually no calls to libev to change the timeout. .Sp To start the machinery, simply initialise the watcher and set \&\f(CW\*(C`last_activity\*(C'\fR to the current time (meaning there was some activity just now), then call the callback, which will \*(L"do the right thing\*(R" and start the timer: .Sp .Vb 3 \& last_activity = ev_now (EV_A); \& ev_init (&timer, callback); \& callback (EV_A_ &timer, 0); .Ve .Sp When there is some activity, simply store the current time in \&\f(CW\*(C`last_activity\*(C'\fR, no libev calls at all: .Sp .Vb 2 \& if (activity detected) \& last_activity = ev_now (EV_A); .Ve .Sp When your timeout value changes, then the timeout can be changed by simply providing a new value, stopping the timer and calling the callback, which will again do the right thing (for example, time out immediately :). .Sp .Vb 3 \& timeout = new_value; \& ev_timer_stop (EV_A_ &timer); \& callback (EV_A_ &timer, 0); .Ve .Sp This technique is slightly more complex, but in most cases where the time-out is unlikely to be triggered, much more efficient. .IP "4. Wee, just use a double-linked list for your timeouts." 4 .IX Item "4. Wee, just use a double-linked list for your timeouts." If there is not one request, but many thousands (millions...), all employing some kind of timeout with the same timeout value, then one can do even better: .Sp When starting the timeout, calculate the timeout value and put the timeout at the \fIend\fR of the list. .Sp Then use an \f(CW\*(C`ev_timer\*(C'\fR to fire when the timeout at the \fIbeginning\fR of the list is expected to fire (for example, using the technique #3). .Sp When there is some activity, remove the timer from the list, recalculate the timeout, append it to the end of the list again, and make sure to update the \f(CW\*(C`ev_timer\*(C'\fR if it was taken from the beginning of the list. .Sp This way, one can manage an unlimited number of timeouts in O(1) time for starting, stopping and updating the timers, at the expense of a major complication, and having to use a constant timeout. The constant timeout ensures that the list stays sorted. .PP So which method the best? .PP Method #2 is a simple no-brain-required solution that is adequate in most situations. Method #3 requires a bit more thinking, but handles many cases better, and isn't very complicated either. In most case, choosing either one is fine, with #3 being better in typical situations. .PP Method #1 is almost always a bad idea, and buys you nothing. Method #4 is rather complicated, but extremely efficient, something that really pays off after the first million or so of active timers, i.e. it's usually overkill :) .PP \fIThe special problem of being too early\fR .IX Subsection "The special problem of being too early" .PP If you ask a timer to call your callback after three seconds, then you expect it to be invoked after three seconds \- but of course, this cannot be guaranteed to infinite precision. Less obviously, it cannot be guaranteed to any precision by libev \- imagine somebody suspending the process with a \s-1STOP\s0 signal for a few hours for example. .PP So, libev tries to invoke your callback as soon as possible \fIafter\fR the delay has occurred, but cannot guarantee this. .PP A less obvious failure mode is calling your callback too early: many event loops compare timestamps with a \*(L"elapsed delay >= requested delay\*(R", but this can cause your callback to be invoked much earlier than you would expect. .PP To see why, imagine a system with a clock that only offers full second resolution (think windows if you can't come up with a broken enough \s-1OS\s0 yourself). If you schedule a one-second timer at the time 500.9, then the event loop will schedule your timeout to elapse at a system time of 500 (500.9 truncated to the resolution) + 1, or 501. .PP If an event library looks at the timeout 0.1s later, it will see \*(L"501 >= 501\*(R" and invoke the callback 0.1s after it was started, even though a one-second delay was requested \- this is being \*(L"too early\*(R", despite best intentions. .PP This is the reason why libev will never invoke the callback if the elapsed delay equals the requested delay, but only when the elapsed delay is larger than the requested delay. In the example above, libev would only invoke the callback at system time 502, or 1.1s after the timer was started. .PP So, while libev cannot guarantee that your callback will be invoked exactly when requested, it \fIcan\fR and \fIdoes\fR guarantee that the requested delay has actually elapsed, or in other words, it always errs on the \*(L"too late\*(R" side of things. .PP \fIThe special problem of time updates\fR .IX Subsection "The special problem of time updates" .PP Establishing the current time is a costly operation (it usually takes at least one system call): \s-1EV\s0 therefore updates its idea of the current time only before and after \f(CW\*(C`ev_run\*(C'\fR collects new events, which causes a growing difference between \f(CW\*(C`ev_now ()\*(C'\fR and \f(CW\*(C`ev_time ()\*(C'\fR when handling lots of events in one iteration. .PP The relative timeouts are calculated relative to the \f(CW\*(C`ev_now ()\*(C'\fR time. This is usually the right thing as this timestamp refers to the time of the event triggering whatever timeout you are modifying/starting. If you suspect event processing to be delayed and you \fIneed\fR to base the timeout on the current time, use something like the following to adjust for it: .PP .Vb 1 \& ev_timer_set (&timer, after + (ev_time () \- ev_now ()), 0.); .Ve .PP If the event loop is suspended for a long time, you can also force an update of the time returned by \f(CW\*(C`ev_now ()\*(C'\fR by calling \f(CW\*(C`ev_now_update ()\*(C'\fR, although that will push the event time of all outstanding events further into the future. .PP \fIThe special problem of unsynchronised clocks\fR .IX Subsection "The special problem of unsynchronised clocks" .PP Modern systems have a variety of clocks \- libev itself uses the normal \&\*(L"wall clock\*(R" clock and, if available, the monotonic clock (to avoid time jumps). .PP Neither of these clocks is synchronised with each other or any other clock on the system, so \f(CW\*(C`ev_time ()\*(C'\fR might return a considerably different time than \f(CW\*(C`gettimeofday ()\*(C'\fR or \f(CW\*(C`time ()\*(C'\fR. On a GNU/Linux system, for example, a call to \f(CW\*(C`gettimeofday\*(C'\fR might return a second count that is one higher than a directly following call to \f(CW\*(C`time\*(C'\fR. .PP The moral of this is to only compare libev-related timestamps with \&\f(CW\*(C`ev_time ()\*(C'\fR and \f(CW\*(C`ev_now ()\*(C'\fR, at least if you want better precision than a second or so. .PP One more problem arises due to this lack of synchronisation: if libev uses the system monotonic clock and you compare timestamps from \f(CW\*(C`ev_time\*(C'\fR or \f(CW\*(C`ev_now\*(C'\fR from when you started your timer and when your callback is invoked, you will find that sometimes the callback is a bit \*(L"early\*(R". .PP This is because \f(CW\*(C`ev_timer\*(C'\fRs work in real time, not wall clock time, so libev makes sure your callback is not invoked before the delay happened, \&\fImeasured according to the real time\fR, not the system clock. .PP If your timeouts are based on a physical timescale (e.g. \*(L"time out this connection after 100 seconds\*(R") then this shouldn't bother you as it is exactly the right behaviour. .PP If you want to compare wall clock/system timestamps to your timers, then you need to use \f(CW\*(C`ev_periodic\*(C'\fRs, as these are based on the wall clock time, where your comparisons will always generate correct results. .PP \fIThe special problems of suspended animation\fR .IX Subsection "The special problems of suspended animation" .PP When you leave the server world it is quite customary to hit machines that can suspend/hibernate \- what happens to the clocks during such a suspend? .PP Some quick tests made with a Linux 2.6.28 indicate that a suspend freezes all processes, while the clocks (\f(CW\*(C`times\*(C'\fR, \f(CW\*(C`CLOCK_MONOTONIC\*(C'\fR) continue to run until the system is suspended, but they will not advance while the system is suspended. That means, on resume, it will be as if the program was frozen for a few seconds, but the suspend time will not be counted towards \f(CW\*(C`ev_timer\*(C'\fR when a monotonic clock source is used. The real time clock advanced as expected, but if it is used as sole clocksource, then a long suspend would be detected as a time jump by libev, and timers would be adjusted accordingly. .PP I would not be surprised to see different behaviour in different between operating systems, \s-1OS\s0 versions or even different hardware. .PP The other form of suspend (job control, or sending a \s-1SIGSTOP\s0) will see a time jump in the monotonic clocks and the realtime clock. If the program is suspended for a very long time, and monotonic clock sources are in use, then you can expect \f(CW\*(C`ev_timer\*(C'\fRs to expire as the full suspension time will be counted towards the timers. When no monotonic clock source is in use, then libev will again assume a timejump and adjust accordingly. .PP It might be beneficial for this latter case to call \f(CW\*(C`ev_suspend\*(C'\fR and \f(CW\*(C`ev_resume\*(C'\fR in code that handles \f(CW\*(C`SIGTSTP\*(C'\fR, to at least get deterministic behaviour in this case (you can do nothing against \&\f(CW\*(C`SIGSTOP\*(C'\fR). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" .PD 0 .IP "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" .PD Configure the timer to trigger after \f(CW\*(C`after\*(C'\fR seconds. If \f(CW\*(C`repeat\*(C'\fR is \f(CW0.\fR, then it will automatically be stopped once the timeout is reached. If it is positive, then the timer will automatically be configured to trigger again \f(CW\*(C`repeat\*(C'\fR seconds later, again, and again, until stopped manually. .Sp The timer itself will do a best-effort at avoiding drift, that is, if you configure a timer to trigger every 10 seconds, then it will normally trigger at exactly 10 second intervals. If, however, your program cannot keep up with the timer (because it takes longer than those 10 seconds to do stuff) the timer will not fire more than once per event loop iteration. .IP "ev_timer_again (loop, ev_timer *)" 4 .IX Item "ev_timer_again (loop, ev_timer *)" This will act as if the timer timed out, and restarts it again if it is repeating. It basically works like calling \f(CW\*(C`ev_timer_stop\*(C'\fR, updating the timeout to the \f(CW\*(C`repeat\*(C'\fR value and calling \f(CW\*(C`ev_timer_start\*(C'\fR. .Sp The exact semantics are as in the following rules, all of which will be applied to the watcher: .RS 4 .IP "If the timer is pending, the pending status is always cleared." 4 .IX Item "If the timer is pending, the pending status is always cleared." .PD 0 .IP "If the timer is started but non-repeating, stop it (as if it timed out, without invoking it)." 4 .IX Item "If the timer is started but non-repeating, stop it (as if it timed out, without invoking it)." .ie n .IP "If the timer is repeating, make the ""repeat"" value the new timeout and start the timer, if necessary." 4 .el .IP "If the timer is repeating, make the \f(CWrepeat\fR value the new timeout and start the timer, if necessary." 4 .IX Item "If the timer is repeating, make the repeat value the new timeout and start the timer, if necessary." .RE .RS 4 .PD .Sp This sounds a bit complicated, see \*(L"Be smart about timeouts\*(R", above, for a usage example. .RE .IP "ev_tstamp ev_timer_remaining (loop, ev_timer *)" 4 .IX Item "ev_tstamp ev_timer_remaining (loop, ev_timer *)" Returns the remaining time until a timer fires. If the timer is active, then this time is relative to the current event loop time, otherwise it's the timeout value currently configured. .Sp That is, after an \f(CW\*(C`ev_timer_set (w, 5, 7)\*(C'\fR, \f(CW\*(C`ev_timer_remaining\*(C'\fR returns \&\f(CW5\fR. When the timer is started and one second passes, \f(CW\*(C`ev_timer_remaining\*(C'\fR will return \f(CW4\fR. When the timer expires and is restarted, it will return roughly \f(CW7\fR (likely slightly less as callback invocation takes some time, too), and so on. .IP "ev_tstamp repeat [read\-write]" 4 .IX Item "ev_tstamp repeat [read-write]" The current \f(CW\*(C`repeat\*(C'\fR value. Will be used each time the watcher times out or \f(CW\*(C`ev_timer_again\*(C'\fR is called, and determines the next timeout (if any), which is also when any modifications are taken into account. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Create a timer that fires after 60 seconds. .PP .Vb 5 \& static void \& one_minute_cb (struct ev_loop *loop, ev_timer *w, int revents) \& { \& .. one minute over, w is actually stopped right here \& } \& \& ev_timer mytimer; \& ev_timer_init (&mytimer, one_minute_cb, 60., 0.); \& ev_timer_start (loop, &mytimer); .Ve .PP Example: Create a timeout timer that times out after 10 seconds of inactivity. .PP .Vb 5 \& static void \& timeout_cb (struct ev_loop *loop, ev_timer *w, int revents) \& { \& .. ten seconds without any activity \& } \& \& ev_timer mytimer; \& ev_timer_init (&mytimer, timeout_cb, 0., 10.); /* note, only repeat used */ \& ev_timer_again (&mytimer); /* start timer */ \& ev_run (loop, 0); \& \& // and in some piece of code that gets executed on any "activity": \& // reset the timeout to start ticking again at 10 seconds \& ev_timer_again (&mytimer); .Ve .ie n .SS """ev_periodic"" \- to cron or not to cron?" .el .SS "\f(CWev_periodic\fP \- to cron or not to cron?" .IX Subsection "ev_periodic - to cron or not to cron?" Periodic watchers are also timers of a kind, but they are very versatile (and unfortunately a bit complex). .PP Unlike \f(CW\*(C`ev_timer\*(C'\fR, periodic watchers are not based on real time (or relative time, the physical time that passes) but on wall clock time (absolute time, the thing you can read on your calender or clock). The difference is that wall clock time can run faster or slower than real time, and time jumps are not uncommon (e.g. when you adjust your wrist-watch). .PP You can tell a periodic watcher to trigger after some specific point in time: for example, if you tell a periodic watcher to trigger \*(L"in 10 seconds\*(R" (by specifying e.g. \f(CW\*(C`ev_now () + 10.\*(C'\fR, that is, an absolute time not a delay) and then reset your system clock to January of the previous year, then it will take a year or more to trigger the event (unlike an \&\f(CW\*(C`ev_timer\*(C'\fR, which would still trigger roughly 10 seconds after starting it, as it uses a relative timeout). .PP \&\f(CW\*(C`ev_periodic\*(C'\fR watchers can also be used to implement vastly more complex timers, such as triggering an event on each \*(L"midnight, local time\*(R", or other complicated rules. This cannot be done with \f(CW\*(C`ev_timer\*(C'\fR watchers, as those cannot react to time jumps. .PP As with timers, the callback is guaranteed to be invoked only when the point in time where it is supposed to trigger has passed. If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones with later time-out values (but this is no longer true when a callback calls \f(CW\*(C`ev_run\*(C'\fR recursively). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_periodic_init (ev_periodic *, callback, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" 4 .IX Item "ev_periodic_init (ev_periodic *, callback, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" .PD 0 .IP "ev_periodic_set (ev_periodic *, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" 4 .IX Item "ev_periodic_set (ev_periodic *, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" .PD Lots of arguments, let's sort it out... There are basically three modes of operation, and we will explain them from simplest to most complex: .RS 4 .IP "\(bu" 4 absolute timer (offset = absolute time, interval = 0, reschedule_cb = 0) .Sp In this configuration the watcher triggers an event after the wall clock time \f(CW\*(C`offset\*(C'\fR has passed. It will not repeat and will not adjust when a time jump occurs, that is, if it is to be run at January 1st 2011 then it will be stopped and invoked when the system clock reaches or surpasses this point in time. .IP "\(bu" 4 repeating interval timer (offset = offset within interval, interval > 0, reschedule_cb = 0) .Sp In this mode the watcher will always be scheduled to time out at the next \&\f(CW\*(C`offset + N * interval\*(C'\fR time (for some integer N, which can also be negative) and then repeat, regardless of any time jumps. The \f(CW\*(C`offset\*(C'\fR argument is merely an offset into the \f(CW\*(C`interval\*(C'\fR periods. .Sp This can be used to create timers that do not drift with respect to the system clock, for example, here is an \f(CW\*(C`ev_periodic\*(C'\fR that triggers each hour, on the hour (with respect to \s-1UTC\s0): .Sp .Vb 1 \& ev_periodic_set (&periodic, 0., 3600., 0); .Ve .Sp This doesn't mean there will always be 3600 seconds in between triggers, but only that the callback will be called when the system time shows a full hour (\s-1UTC\s0), or more correctly, when the system time is evenly divisible by 3600. .Sp Another way to think about it (for the mathematically inclined) is that \&\f(CW\*(C`ev_periodic\*(C'\fR will try to run the callback in this mode at the next possible time where \f(CW\*(C`time = offset (mod interval)\*(C'\fR, regardless of any time jumps. .Sp The \f(CW\*(C`interval\*(C'\fR \fI\s-1MUST\s0\fR be positive, and for numerical stability, the interval value should be higher than \f(CW\*(C`1/8192\*(C'\fR (which is around 100 microseconds) and \f(CW\*(C`offset\*(C'\fR should be higher than \f(CW0\fR and should have at most a similar magnitude as the current time (say, within a factor of ten). Typical values for offset are, in fact, \f(CW0\fR or something between \&\f(CW0\fR and \f(CW\*(C`interval\*(C'\fR, which is also the recommended range. .Sp Note also that there is an upper limit to how often a timer can fire (\s-1CPU\s0 speed for example), so if \f(CW\*(C`interval\*(C'\fR is very small then timing stability will of course deteriorate. Libev itself tries to be exact to be about one millisecond (if the \s-1OS\s0 supports it and the machine is fast enough). .IP "\(bu" 4 manual reschedule mode (offset ignored, interval ignored, reschedule_cb = callback) .Sp In this mode the values for \f(CW\*(C`interval\*(C'\fR and \f(CW\*(C`offset\*(C'\fR are both being ignored. Instead, each time the periodic watcher gets scheduled, the reschedule callback will be called with the watcher as first, and the current time as second argument. .Sp \&\s-1NOTE: \s0\fIThis callback \s-1MUST NOT\s0 stop or destroy any periodic watcher, ever, or make \s-1ANY\s0 other event loop modifications whatsoever, unless explicitly allowed by documentation here\fR. .Sp If you need to stop it, return \f(CW\*(C`now + 1e30\*(C'\fR (or so, fudge fudge) and stop it afterwards (e.g. by starting an \f(CW\*(C`ev_prepare\*(C'\fR watcher, which is the only event loop modification you are allowed to do). .Sp The callback prototype is \f(CW\*(C`ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now)\*(C'\fR, e.g.: .Sp .Vb 5 \& static ev_tstamp \& my_rescheduler (ev_periodic *w, ev_tstamp now) \& { \& return now + 60.; \& } .Ve .Sp It must return the next time to trigger, based on the passed time value (that is, the lowest time value larger than to the second argument). It will usually be called just before the callback will be triggered, but might be called at other times, too. .Sp \&\s-1NOTE: \s0\fIThis callback must always return a time that is higher than or equal to the passed \f(CI\*(C`now\*(C'\fI value\fR. .Sp This can be used to create very complex timers, such as a timer that triggers on \*(L"next midnight, local time\*(R". To do this, you would calculate the next midnight after \f(CW\*(C`now\*(C'\fR and return the timestamp value for this. How you do this is, again, up to you (but it is not trivial, which is the main reason I omitted it as an example). .RE .RS 4 .RE .IP "ev_periodic_again (loop, ev_periodic *)" 4 .IX Item "ev_periodic_again (loop, ev_periodic *)" Simply stops and restarts the periodic watcher again. This is only useful when you changed some parameters or the reschedule callback would return a different time than the last time it was called (e.g. in a crond like program when the crontabs have changed). .IP "ev_tstamp ev_periodic_at (ev_periodic *)" 4 .IX Item "ev_tstamp ev_periodic_at (ev_periodic *)" When active, returns the absolute time that the watcher is supposed to trigger next. This is not the same as the \f(CW\*(C`offset\*(C'\fR argument to \&\f(CW\*(C`ev_periodic_set\*(C'\fR, but indeed works even in interval and manual rescheduling modes. .IP "ev_tstamp offset [read\-write]" 4 .IX Item "ev_tstamp offset [read-write]" When repeating, this contains the offset value, otherwise this is the absolute point in time (the \f(CW\*(C`offset\*(C'\fR value passed to \f(CW\*(C`ev_periodic_set\*(C'\fR, although libev might modify this value for better numerical stability). .Sp Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp interval [read\-write]" 4 .IX Item "ev_tstamp interval [read-write]" The current interval value. Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now) [read\-write]" 4 .IX Item "ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now) [read-write]" The current reschedule callback, or \f(CW0\fR, if this functionality is switched off. Can be changed any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call a callback every hour, or, more precisely, whenever the system time is divisible by 3600. The callback invocation times have potentially a lot of jitter, but good long-term stability. .PP .Vb 5 \& static void \& clock_cb (struct ev_loop *loop, ev_periodic *w, int revents) \& { \& ... its now a full hour (UTC, or TAI or whatever your clock follows) \& } \& \& ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, 0., 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .PP Example: The same as above, but use a reschedule callback to do it: .PP .Vb 1 \& #include \& \& static ev_tstamp \& my_scheduler_cb (ev_periodic *w, ev_tstamp now) \& { \& return now + (3600. \- fmod (now, 3600.)); \& } \& \& ev_periodic_init (&hourly_tick, clock_cb, 0., 0., my_scheduler_cb); .Ve .PP Example: Call a callback every hour, starting now: .PP .Vb 4 \& ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, \& fmod (ev_now (loop), 3600.), 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .ie n .SS """ev_signal"" \- signal me when a signal gets signalled!" .el .SS "\f(CWev_signal\fP \- signal me when a signal gets signalled!" .IX Subsection "ev_signal - signal me when a signal gets signalled!" Signal watchers will trigger an event when the process receives a specific signal one or more times. Even though signals are very asynchronous, libev will try its best to deliver signals synchronously, i.e. as part of the normal event processing, like any other event. .PP If you want signals to be delivered truly asynchronously, just use \&\f(CW\*(C`sigaction\*(C'\fR as you would do without libev and forget about sharing the signal. You can even use \f(CW\*(C`ev_async\*(C'\fR from a signal handler to synchronously wake up an event loop. .PP You can configure as many watchers as you like for the same signal, but only within the same loop, i.e. you can watch for \f(CW\*(C`SIGINT\*(C'\fR in your default loop and for \f(CW\*(C`SIGIO\*(C'\fR in another loop, but you cannot watch for \&\f(CW\*(C`SIGINT\*(C'\fR in both the default loop and another loop at the same time. At the moment, \f(CW\*(C`SIGCHLD\*(C'\fR is permanently tied to the default loop. .PP Only after the first watcher for a signal is started will libev actually register something with the kernel. It thus coexists with your own signal handlers as long as you don't register any with libev for the same signal. .PP If possible and supported, libev will install its handlers with \&\f(CW\*(C`SA_RESTART\*(C'\fR (or equivalent) behaviour enabled, so system calls should not be unduly interrupted. If you have a problem with system calls getting interrupted by signals you can block all signals in an \f(CW\*(C`ev_check\*(C'\fR watcher and unblock them in an \f(CW\*(C`ev_prepare\*(C'\fR watcher. .PP \fIThe special problem of inheritance over fork/execve/pthread_create\fR .IX Subsection "The special problem of inheritance over fork/execve/pthread_create" .PP Both the signal mask (\f(CW\*(C`sigprocmask\*(C'\fR) and the signal disposition (\f(CW\*(C`sigaction\*(C'\fR) are unspecified after starting a signal watcher (and after stopping it again), that is, libev might or might not block the signal, and might or might not set or restore the installed signal handler (but see \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR). .PP While this does not matter for the signal disposition (libev never sets signals to \f(CW\*(C`SIG_IGN\*(C'\fR, so handlers will be reset to \f(CW\*(C`SIG_DFL\*(C'\fR on \&\f(CW\*(C`execve\*(C'\fR), this matters for the signal mask: many programs do not expect certain signals to be blocked. .PP This means that before calling \f(CW\*(C`exec\*(C'\fR (from the child) you should reset the signal mask to whatever \*(L"default\*(R" you expect (all clear is a good choice usually). .PP The simplest way to ensure that the signal mask is reset in the child is to install a fork handler with \f(CW\*(C`pthread_atfork\*(C'\fR that resets it. That will catch fork calls done by libraries (such as the libc) as well. .PP In current versions of libev, the signal will not be blocked indefinitely unless you use the \f(CW\*(C`signalfd\*(C'\fR \s-1API \s0(\f(CW\*(C`EV_SIGNALFD\*(C'\fR). While this reduces the window of opportunity for problems, it will not go away, as libev \&\fIhas\fR to modify the signal mask, at least temporarily. .PP So I can't stress this enough: \fIIf you do not reset your signal mask when you expect it to be empty, you have a race condition in your code\fR. This is not a libev-specific thing, this is true for most event libraries. .PP \fIThe special problem of threads signal handling\fR .IX Subsection "The special problem of threads signal handling" .PP \&\s-1POSIX\s0 threads has problematic signal handling semantics, specifically, a lot of functionality (sigfd, sigwait etc.) only really works if all threads in a process block signals, which is hard to achieve. .PP When you want to use sigwait (or mix libev signal handling with your own for the same signals), you can tackle this problem by globally blocking all signals before creating any threads (or creating them with a fully set sigprocmask) and also specifying the \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR when creating loops. Then designate one thread as \*(L"signal receiver thread\*(R" which handles these signals. You can pass on any signals that libev might be interested in by calling \f(CW\*(C`ev_feed_signal\*(C'\fR. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_signal_init (ev_signal *, callback, int signum)" 4 .IX Item "ev_signal_init (ev_signal *, callback, int signum)" .PD 0 .IP "ev_signal_set (ev_signal *, int signum)" 4 .IX Item "ev_signal_set (ev_signal *, int signum)" .PD Configures the watcher to trigger on the given signal number (usually one of the \f(CW\*(C`SIGxxx\*(C'\fR constants). .IP "int signum [read\-only]" 4 .IX Item "int signum [read-only]" The signal the watcher watches out for. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to exit cleanly on \s-1SIGINT.\s0 .PP .Vb 5 \& static void \& sigint_cb (struct ev_loop *loop, ev_signal *w, int revents) \& { \& ev_break (loop, EVBREAK_ALL); \& } \& \& ev_signal signal_watcher; \& ev_signal_init (&signal_watcher, sigint_cb, SIGINT); \& ev_signal_start (loop, &signal_watcher); .Ve .ie n .SS """ev_child"" \- watch out for process status changes" .el .SS "\f(CWev_child\fP \- watch out for process status changes" .IX Subsection "ev_child - watch out for process status changes" Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to some child status changes (most typically when a child of yours dies or exits). It is permissible to install a child watcher \fIafter\fR the child has been forked (which implies it might have already exited), as long as the event loop isn't entered (or is continued from a watcher), i.e., forking and then immediately registering a watcher for the child is fine, but forking and registering a watcher a few event loop iterations later or in the next callback invocation is not. .PP Only the default event loop is capable of handling signals, and therefore you can only register child watchers in the default event loop. .PP Due to some design glitches inside libev, child watchers will always be handled at maximum priority (their priority is set to \f(CW\*(C`EV_MAXPRI\*(C'\fR by libev) .PP \fIProcess Interaction\fR .IX Subsection "Process Interaction" .PP Libev grabs \f(CW\*(C`SIGCHLD\*(C'\fR as soon as the default event loop is initialised. This is necessary to guarantee proper behaviour even if the first child watcher is started after the child exits. The occurrence of \f(CW\*(C`SIGCHLD\*(C'\fR is recorded asynchronously, but child reaping is done synchronously as part of the event loop processing. Libev always reaps all children, even ones not watched. .PP \fIOverriding the Built-In Processing\fR .IX Subsection "Overriding the Built-In Processing" .PP Libev offers no special support for overriding the built-in child processing, but if your application collides with libev's default child handler, you can override it easily by installing your own handler for \&\f(CW\*(C`SIGCHLD\*(C'\fR after initialising the default loop, and making sure the default loop never gets destroyed. You are encouraged, however, to use an event-based approach to child reaping and thus use libev's support for that, so other libev users can use \f(CW\*(C`ev_child\*(C'\fR watchers freely. .PP \fIStopping the Child Watcher\fR .IX Subsection "Stopping the Child Watcher" .PP Currently, the child watcher never gets stopped, even when the child terminates, so normally one needs to stop the watcher in the callback. Future versions of libev might stop the watcher automatically when a child exit is detected (calling \f(CW\*(C`ev_child_stop\*(C'\fR twice is not a problem). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_child_init (ev_child *, callback, int pid, int trace)" 4 .IX Item "ev_child_init (ev_child *, callback, int pid, int trace)" .PD 0 .IP "ev_child_set (ev_child *, int pid, int trace)" 4 .IX Item "ev_child_set (ev_child *, int pid, int trace)" .PD Configures the watcher to wait for status changes of process \f(CW\*(C`pid\*(C'\fR (or \&\fIany\fR process if \f(CW\*(C`pid\*(C'\fR is specified as \f(CW0\fR). The callback can look at the \f(CW\*(C`rstatus\*(C'\fR member of the \f(CW\*(C`ev_child\*(C'\fR watcher structure to see the status word (use the macros from \f(CW\*(C`sys/wait.h\*(C'\fR and see your systems \&\f(CW\*(C`waitpid\*(C'\fR documentation). The \f(CW\*(C`rpid\*(C'\fR member contains the pid of the process causing the status change. \f(CW\*(C`trace\*(C'\fR must be either \f(CW0\fR (only activate the watcher when the process terminates) or \f(CW1\fR (additionally activate the watcher when the process is stopped or continued). .IP "int pid [read\-only]" 4 .IX Item "int pid [read-only]" The process id this watcher watches out for, or \f(CW0\fR, meaning any process id. .IP "int rpid [read\-write]" 4 .IX Item "int rpid [read-write]" The process id that detected a status change. .IP "int rstatus [read\-write]" 4 .IX Item "int rstatus [read-write]" The process exit/trace status caused by \f(CW\*(C`rpid\*(C'\fR (see your systems \&\f(CW\*(C`waitpid\*(C'\fR and \f(CW\*(C`sys/wait.h\*(C'\fR documentation for details). .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: \f(CW\*(C`fork()\*(C'\fR a new process and install a child handler to wait for its completion. .PP .Vb 1 \& ev_child cw; \& \& static void \& child_cb (EV_P_ ev_child *w, int revents) \& { \& ev_child_stop (EV_A_ w); \& printf ("process %d exited with status %x\en", w\->rpid, w\->rstatus); \& } \& \& pid_t pid = fork (); \& \& if (pid < 0) \& // error \& else if (pid == 0) \& { \& // the forked child executes here \& exit (1); \& } \& else \& { \& ev_child_init (&cw, child_cb, pid, 0); \& ev_child_start (EV_DEFAULT_ &cw); \& } .Ve .ie n .SS """ev_stat"" \- did the file attributes just change?" .el .SS "\f(CWev_stat\fP \- did the file attributes just change?" .IX Subsection "ev_stat - did the file attributes just change?" This watches a file system path for attribute changes. That is, it calls \&\f(CW\*(C`stat\*(C'\fR on that path in regular intervals (or when the \s-1OS\s0 says it changed) and sees if it changed compared to the last time, invoking the callback if it did. Starting the watcher \f(CW\*(C`stat\*(C'\fR's the file, so only changes that happen after the watcher has been started will be reported. .PP The path does not need to exist: changing from \*(L"path exists\*(R" to \*(L"path does not exist\*(R" is a status change like any other. The condition \*(L"path does not exist\*(R" (or more correctly \*(L"path cannot be stat'ed\*(R") is signified by the \&\f(CW\*(C`st_nlink\*(C'\fR field being zero (which is otherwise always forced to be at least one) and all the other fields of the stat buffer having unspecified contents. .PP The path \fImust not\fR end in a slash or contain special components such as \&\f(CW\*(C`.\*(C'\fR or \f(CW\*(C`..\*(C'\fR. The path \fIshould\fR be absolute: If it is relative and your working directory changes, then the behaviour is undefined. .PP Since there is no portable change notification interface available, the portable implementation simply calls \f(CWstat(2)\fR regularly on the path to see if it changed somehow. You can specify a recommended polling interval for this case. If you specify a polling interval of \f(CW0\fR (highly recommended!) then a \fIsuitable, unspecified default\fR value will be used (which you can expect to be around five seconds, although this might change dynamically). Libev will also impose a minimum interval which is currently around \f(CW0.1\fR, but that's usually overkill. .PP This watcher type is not meant for massive numbers of stat watchers, as even with OS-supported change notifications, this can be resource-intensive. .PP At the time of this writing, the only OS-specific interface implemented is the Linux inotify interface (implementing kqueue support is left as an exercise for the reader. Note, however, that the author sees no way of implementing \f(CW\*(C`ev_stat\*(C'\fR semantics with kqueue, except as a hint). .PP \fI\s-1ABI\s0 Issues (Largefile Support)\fR .IX Subsection "ABI Issues (Largefile Support)" .PP Libev by default (unless the user overrides this) uses the default compilation environment, which means that on systems with large file support disabled by default, you get the 32 bit version of the stat structure. When using the library from programs that change the \s-1ABI\s0 to use 64 bit file offsets the programs will fail. In that case you have to compile libev with the same flags to get binary compatibility. This is obviously the case with any flags that change the \s-1ABI,\s0 but the problem is most noticeably displayed with ev_stat and large file support. .PP The solution for this is to lobby your distribution maker to make large file interfaces available by default (as e.g. FreeBSD does) and not optional. Libev cannot simply switch on large file support because it has to exchange stat structures with application programs compiled using the default compilation environment. .PP \fIInotify and Kqueue\fR .IX Subsection "Inotify and Kqueue" .PP When \f(CW\*(C`inotify (7)\*(C'\fR support has been compiled into libev and present at runtime, it will be used to speed up change detection where possible. The inotify descriptor will be created lazily when the first \f(CW\*(C`ev_stat\*(C'\fR watcher is being started. .PP Inotify presence does not change the semantics of \f(CW\*(C`ev_stat\*(C'\fR watchers except that changes might be detected earlier, and in some cases, to avoid making regular \f(CW\*(C`stat\*(C'\fR calls. Even in the presence of inotify support there are many cases where libev has to resort to regular \f(CW\*(C`stat\*(C'\fR polling, but as long as kernel 2.6.25 or newer is used (2.6.24 and older have too many bugs), the path exists (i.e. stat succeeds), and the path resides on a local filesystem (libev currently assumes only ext2/3, jfs, reiserfs and xfs are fully working) libev usually gets away without polling. .PP There is no support for kqueue, as apparently it cannot be used to implement this functionality, due to the requirement of having a file descriptor open on the object at all times, and detecting renames, unlinks etc. is difficult. .PP \fI\f(CI\*(C`stat ()\*(C'\fI is a synchronous operation\fR .IX Subsection "stat () is a synchronous operation" .PP Libev doesn't normally do any kind of I/O itself, and so is not blocking the process. The exception are \f(CW\*(C`ev_stat\*(C'\fR watchers \- those call \f(CW\*(C`stat ()\*(C'\fR, which is a synchronous operation. .PP For local paths, this usually doesn't matter: unless the system is very busy or the intervals between stat's are large, a stat call will be fast, as the path data is usually in memory already (except when starting the watcher). .PP For networked file systems, calling \f(CW\*(C`stat ()\*(C'\fR can block an indefinite time due to network issues, and even under good conditions, a stat call often takes multiple milliseconds. .PP Therefore, it is best to avoid using \f(CW\*(C`ev_stat\*(C'\fR watchers on networked paths, although this is fully supported by libev. .PP \fIThe special problem of stat time resolution\fR .IX Subsection "The special problem of stat time resolution" .PP The \f(CW\*(C`stat ()\*(C'\fR system call only supports full-second resolution portably, and even on systems where the resolution is higher, most file systems still only support whole seconds. .PP That means that, if the time is the only thing that changes, you can easily miss updates: on the first update, \f(CW\*(C`ev_stat\*(C'\fR detects a change and calls your callback, which does something. When there is another update within the same second, \f(CW\*(C`ev_stat\*(C'\fR will be unable to detect unless the stat data does change in other ways (e.g. file size). .PP The solution to this is to delay acting on a change for slightly more than a second (or till slightly after the next full second boundary), using a roughly one-second-delay \f(CW\*(C`ev_timer\*(C'\fR (e.g. \f(CW\*(C`ev_timer_set (w, 0., 1.02); ev_timer_again (loop, w)\*(C'\fR). .PP The \f(CW.02\fR offset is added to work around small timing inconsistencies of some operating systems (where the second counter of the current time might be be delayed. One such system is the Linux kernel, where a call to \&\f(CW\*(C`gettimeofday\*(C'\fR might return a timestamp with a full second later than a subsequent \f(CW\*(C`time\*(C'\fR call \- if the equivalent of \f(CW\*(C`time ()\*(C'\fR is used to update file times then there will be a small window where the kernel uses the previous second to update file times but libev might already execute the timer callback). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" .PD 0 .IP "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" .PD Configures the watcher to wait for status changes of the given \&\f(CW\*(C`path\*(C'\fR. The \f(CW\*(C`interval\*(C'\fR is a hint on how quickly a change is expected to be detected and should normally be specified as \f(CW0\fR to let libev choose a suitable value. The memory pointed to by \f(CW\*(C`path\*(C'\fR must point to the same path for as long as the watcher is active. .Sp The callback will receive an \f(CW\*(C`EV_STAT\*(C'\fR event when a change was detected, relative to the attributes at the time the watcher was started (or the last change was detected). .IP "ev_stat_stat (loop, ev_stat *)" 4 .IX Item "ev_stat_stat (loop, ev_stat *)" Updates the stat buffer immediately with new values. If you change the watched path in your callback, you could call this function to avoid detecting this change (while introducing a race condition if you are not the only one changing the path). Can also be useful simply to find out the new values. .IP "ev_statdata attr [read\-only]" 4 .IX Item "ev_statdata attr [read-only]" The most-recently detected attributes of the file. Although the type is \&\f(CW\*(C`ev_statdata\*(C'\fR, this is usually the (or one of the) \f(CW\*(C`struct stat\*(C'\fR types suitable for your system, but you can only rely on the POSIX-standardised members to be present. If the \f(CW\*(C`st_nlink\*(C'\fR member is \f(CW0\fR, then there was some error while \f(CW\*(C`stat\*(C'\fRing the file. .IP "ev_statdata prev [read\-only]" 4 .IX Item "ev_statdata prev [read-only]" The previous attributes of the file. The callback gets invoked whenever \&\f(CW\*(C`prev\*(C'\fR != \f(CW\*(C`attr\*(C'\fR, or, more precisely, one or more of these members differ: \f(CW\*(C`st_dev\*(C'\fR, \f(CW\*(C`st_ino\*(C'\fR, \f(CW\*(C`st_mode\*(C'\fR, \f(CW\*(C`st_nlink\*(C'\fR, \f(CW\*(C`st_uid\*(C'\fR, \&\f(CW\*(C`st_gid\*(C'\fR, \f(CW\*(C`st_rdev\*(C'\fR, \f(CW\*(C`st_size\*(C'\fR, \f(CW\*(C`st_atime\*(C'\fR, \f(CW\*(C`st_mtime\*(C'\fR, \f(CW\*(C`st_ctime\*(C'\fR. .IP "ev_tstamp interval [read\-only]" 4 .IX Item "ev_tstamp interval [read-only]" The specified interval. .IP "const char *path [read\-only]" 4 .IX Item "const char *path [read-only]" The file system path that is being watched. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Watch \f(CW\*(C`/etc/passwd\*(C'\fR for attribute changes. .PP .Vb 10 \& static void \& passwd_cb (struct ev_loop *loop, ev_stat *w, int revents) \& { \& /* /etc/passwd changed in some way */ \& if (w\->attr.st_nlink) \& { \& printf ("passwd current size %ld\en", (long)w\->attr.st_size); \& printf ("passwd current atime %ld\en", (long)w\->attr.st_mtime); \& printf ("passwd current mtime %ld\en", (long)w\->attr.st_mtime); \& } \& else \& /* you shalt not abuse printf for puts */ \& puts ("wow, /etc/passwd is not there, expect problems. " \& "if this is windows, they already arrived\en"); \& } \& \& ... \& ev_stat passwd; \& \& ev_stat_init (&passwd, passwd_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); .Ve .PP Example: Like above, but additionally use a one-second delay so we do not miss updates (however, frequent updates will delay processing, too, so one might do the work both on \f(CW\*(C`ev_stat\*(C'\fR callback invocation \fIand\fR on \&\f(CW\*(C`ev_timer\*(C'\fR callback invocation). .PP .Vb 2 \& static ev_stat passwd; \& static ev_timer timer; \& \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_timer_stop (EV_A_ w); \& \& /* now it\*(Aqs one second after the most recent passwd change */ \& } \& \& static void \& stat_cb (EV_P_ ev_stat *w, int revents) \& { \& /* reset the one\-second timer */ \& ev_timer_again (EV_A_ &timer); \& } \& \& ... \& ev_stat_init (&passwd, stat_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); \& ev_timer_init (&timer, timer_cb, 0., 1.02); .Ve .ie n .SS """ev_idle"" \- when you've got nothing better to do..." .el .SS "\f(CWev_idle\fP \- when you've got nothing better to do..." .IX Subsection "ev_idle - when you've got nothing better to do..." Idle watchers trigger events when no other events of the same or higher priority are pending (prepare, check and other idle watchers do not count as receiving \*(L"events\*(R"). .PP That is, as long as your process is busy handling sockets or timeouts (or even signals, imagine) of the same or higher priority it will not be triggered. But when your process is idle (or only lower-priority watchers are pending), the idle watchers are being called once per event loop iteration \- until stopped, that is, or your process receives more events and becomes busy again with higher priority stuff. .PP The most noteworthy effect is that as long as any idle watchers are active, the process will not block when waiting for new events. .PP Apart from keeping your process non-blocking (which is a useful effect on its own sometimes), idle watchers are a good place to do \&\*(L"pseudo-background processing\*(R", or delay processing stuff to after the event loop has handled all outstanding events. .PP \fIAbusing an \f(CI\*(C`ev_idle\*(C'\fI watcher for its side-effect\fR .IX Subsection "Abusing an ev_idle watcher for its side-effect" .PP As long as there is at least one active idle watcher, libev will never sleep unnecessarily. Or in other words, it will loop as fast as possible. For this to work, the idle watcher doesn't need to be invoked at all \- the lowest priority will do. .PP This mode of operation can be useful together with an \f(CW\*(C`ev_check\*(C'\fR watcher, to do something on each event loop iteration \- for example to balance load between different connections. .PP See \*(L"Abusing an ev_check watcher for its side-effect\*(R" for a longer example. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_idle_init (ev_idle *, callback)" 4 .IX Item "ev_idle_init (ev_idle *, callback)" Initialises and configures the idle watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_idle_set\*(C'\fR macro, but using it is utterly pointless, believe me. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Dynamically allocate an \f(CW\*(C`ev_idle\*(C'\fR watcher, start it, and in the callback, free it. Also, use no error checking, as usual. .PP .Vb 5 \& static void \& idle_cb (struct ev_loop *loop, ev_idle *w, int revents) \& { \& // stop the watcher \& ev_idle_stop (loop, w); \& \& // now we can free it \& free (w); \& \& // now do something you wanted to do when the program has \& // no longer anything immediate to do. \& } \& \& ev_idle *idle_watcher = malloc (sizeof (ev_idle)); \& ev_idle_init (idle_watcher, idle_cb); \& ev_idle_start (loop, idle_watcher); .Ve .ie n .SS """ev_prepare"" and ""ev_check"" \- customise your event loop!" .el .SS "\f(CWev_prepare\fP and \f(CWev_check\fP \- customise your event loop!" .IX Subsection "ev_prepare and ev_check - customise your event loop!" Prepare and check watchers are often (but not always) used in pairs: prepare watchers get invoked before the process blocks and check watchers afterwards. .PP You \fImust not\fR call \f(CW\*(C`ev_run\*(C'\fR (or similar functions that enter the current event loop) or \f(CW\*(C`ev_loop_fork\*(C'\fR from either \f(CW\*(C`ev_prepare\*(C'\fR or \&\f(CW\*(C`ev_check\*(C'\fR watchers. Other loops than the current one are fine, however. The rationale behind this is that you do not need to check for recursion in those watchers, i.e. the sequence will always be \&\f(CW\*(C`ev_prepare\*(C'\fR, blocking, \f(CW\*(C`ev_check\*(C'\fR so if you have one watcher of each kind they will always be called in pairs bracketing the blocking call. .PP Their main purpose is to integrate other event mechanisms into libev and their use is somewhat advanced. They could be used, for example, to track variable changes, implement your own watchers, integrate net-snmp or a coroutine library and lots more. They are also occasionally useful if you cache some data and want to flush it before blocking (for example, in X programs you might want to do an \f(CW\*(C`XFlush ()\*(C'\fR in an \f(CW\*(C`ev_prepare\*(C'\fR watcher). .PP This is done by examining in each prepare call which file descriptors need to be watched by the other library, registering \f(CW\*(C`ev_io\*(C'\fR watchers for them and starting an \f(CW\*(C`ev_timer\*(C'\fR watcher for any timeouts (many libraries provide exactly this functionality). Then, in the check watcher, you check for any events that occurred (by checking the pending status of all watchers and stopping them) and call back into the library. The I/O and timer callbacks will never actually be called (but must be valid nevertheless, because you never know, you know?). .PP As another example, the Perl Coro module uses these hooks to integrate coroutines into libev programs, by yielding to other active coroutines during each prepare and only letting the process block if no coroutines are ready to run (it's actually more complicated: it only runs coroutines with priority higher than or equal to the event loop and one coroutine of lower priority, but only once, using idle watchers to keep the event loop from blocking if lower-priority coroutines are active, thus mapping low-priority coroutines to idle/background tasks). .PP When used for this purpose, it is recommended to give \f(CW\*(C`ev_check\*(C'\fR watchers highest (\f(CW\*(C`EV_MAXPRI\*(C'\fR) priority, to ensure that they are being run before any other watchers after the poll (this doesn't matter for \f(CW\*(C`ev_prepare\*(C'\fR watchers). .PP Also, \f(CW\*(C`ev_check\*(C'\fR watchers (and \f(CW\*(C`ev_prepare\*(C'\fR watchers, too) should not activate (\*(L"feed\*(R") events into libev. While libev fully supports this, they might get executed before other \f(CW\*(C`ev_check\*(C'\fR watchers did their job. As \&\f(CW\*(C`ev_check\*(C'\fR watchers are often used to embed other (non-libev) event loops those other event loops might be in an unusable state until their \&\f(CW\*(C`ev_check\*(C'\fR watcher ran (always remind yourself to coexist peacefully with others). .PP \fIAbusing an \f(CI\*(C`ev_check\*(C'\fI watcher for its side-effect\fR .IX Subsection "Abusing an ev_check watcher for its side-effect" .PP \&\f(CW\*(C`ev_check\*(C'\fR (and less often also \f(CW\*(C`ev_prepare\*(C'\fR) watchers can also be useful because they are called once per event loop iteration. For example, if you want to handle a large number of connections fairly, you normally only do a bit of work for each active connection, and if there is more work to do, you wait for the next event loop iteration, so other connections have a chance of making progress. .PP Using an \f(CW\*(C`ev_check\*(C'\fR watcher is almost enough: it will be called on the next event loop iteration. However, that isn't as soon as possible \- without external events, your \f(CW\*(C`ev_check\*(C'\fR watcher will not be invoked. .PP This is where \f(CW\*(C`ev_idle\*(C'\fR watchers come in handy \- all you need is a single global idle watcher that is active as long as you have one active \&\f(CW\*(C`ev_check\*(C'\fR watcher. The \f(CW\*(C`ev_idle\*(C'\fR watcher makes sure the event loop will not sleep, and the \f(CW\*(C`ev_check\*(C'\fR watcher makes sure a callback gets invoked. Neither watcher alone can do that. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_prepare_init (ev_prepare *, callback)" 4 .IX Item "ev_prepare_init (ev_prepare *, callback)" .PD 0 .IP "ev_check_init (ev_check *, callback)" 4 .IX Item "ev_check_init (ev_check *, callback)" .PD Initialises and configures the prepare or check watcher \- they have no parameters of any kind. There are \f(CW\*(C`ev_prepare_set\*(C'\fR and \f(CW\*(C`ev_check_set\*(C'\fR macros, but using them is utterly, utterly, utterly and completely pointless. .PP \fIExamples\fR .IX Subsection "Examples" .PP There are a number of principal ways to embed other event loops or modules into libev. Here are some ideas on how to include libadns into libev (there is a Perl module named \f(CW\*(C`EV::ADNS\*(C'\fR that does this, which you could use as a working example. Another Perl module named \f(CW\*(C`EV::Glib\*(C'\fR embeds a Glib main context into libev, and finally, \f(CW\*(C`Glib::EV\*(C'\fR embeds \s-1EV\s0 into the Glib event loop). .PP Method 1: Add \s-1IO\s0 watchers and a timeout watcher in a prepare handler, and in a check watcher, destroy them and call into libadns. What follows is pseudo-code only of course. This requires you to either use a low priority for the check watcher or use \f(CW\*(C`ev_clear_pending\*(C'\fR explicitly, as the callbacks for the IO/timeout watchers might not have been called yet. .PP .Vb 2 \& static ev_io iow [nfd]; \& static ev_timer tw; \& \& static void \& io_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& } \& \& // create io watchers for each fd and a timer before blocking \& static void \& adns_prepare_cb (struct ev_loop *loop, ev_prepare *w, int revents) \& { \& int timeout = 3600000; \& struct pollfd fds [nfd]; \& // actual code will need to loop here and realloc etc. \& adns_beforepoll (ads, fds, &nfd, &timeout, timeval_from (ev_time ())); \& \& /* the callback is illegal, but won\*(Aqt be called as we stop during check */ \& ev_timer_init (&tw, 0, timeout * 1e\-3, 0.); \& ev_timer_start (loop, &tw); \& \& // create one ev_io per pollfd \& for (int i = 0; i < nfd; ++i) \& { \& ev_io_init (iow + i, io_cb, fds [i].fd, \& ((fds [i].events & POLLIN ? EV_READ : 0) \& | (fds [i].events & POLLOUT ? EV_WRITE : 0))); \& \& fds [i].revents = 0; \& ev_io_start (loop, iow + i); \& } \& } \& \& // stop all watchers after blocking \& static void \& adns_check_cb (struct ev_loop *loop, ev_check *w, int revents) \& { \& ev_timer_stop (loop, &tw); \& \& for (int i = 0; i < nfd; ++i) \& { \& // set the relevant poll flags \& // could also call adns_processreadable etc. here \& struct pollfd *fd = fds + i; \& int revents = ev_clear_pending (iow + i); \& if (revents & EV_READ ) fd\->revents |= fd\->events & POLLIN; \& if (revents & EV_WRITE) fd\->revents |= fd\->events & POLLOUT; \& \& // now stop the watcher \& ev_io_stop (loop, iow + i); \& } \& \& adns_afterpoll (adns, fds, nfd, timeval_from (ev_now (loop)); \& } .Ve .PP Method 2: This would be just like method 1, but you run \f(CW\*(C`adns_afterpoll\*(C'\fR in the prepare watcher and would dispose of the check watcher. .PP Method 3: If the module to be embedded supports explicit event notification (libadns does), you can also make use of the actual watcher callbacks, and only destroy/create the watchers in the prepare watcher. .PP .Vb 5 \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& adns_processtimeouts (ads, &tv_now); \& } \& \& static void \& io_cb (EV_P_ ev_io *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& if (revents & EV_READ ) adns_processreadable (ads, w\->fd, &tv_now); \& if (revents & EV_WRITE) adns_processwriteable (ads, w\->fd, &tv_now); \& } \& \& // do not ever call adns_afterpoll .Ve .PP Method 4: Do not use a prepare or check watcher because the module you want to embed is not flexible enough to support it. Instead, you can override their poll function. The drawback with this solution is that the main loop is now no longer controllable by \s-1EV.\s0 The \f(CW\*(C`Glib::EV\*(C'\fR module uses this approach, effectively embedding \s-1EV\s0 as a client into the horrible libglib event loop. .PP .Vb 4 \& static gint \& event_poll_func (GPollFD *fds, guint nfds, gint timeout) \& { \& int got_events = 0; \& \& for (n = 0; n < nfds; ++n) \& // create/start io watcher that sets the relevant bits in fds[n] and increment got_events \& \& if (timeout >= 0) \& // create/start timer \& \& // poll \& ev_run (EV_A_ 0); \& \& // stop timer again \& if (timeout >= 0) \& ev_timer_stop (EV_A_ &to); \& \& // stop io watchers again \- their callbacks should have set \& for (n = 0; n < nfds; ++n) \& ev_io_stop (EV_A_ iow [n]); \& \& return got_events; \& } .Ve .ie n .SS """ev_embed"" \- when one backend isn't enough..." .el .SS "\f(CWev_embed\fP \- when one backend isn't enough..." .IX Subsection "ev_embed - when one backend isn't enough..." This is a rather advanced watcher type that lets you embed one event loop into another (currently only \f(CW\*(C`ev_io\*(C'\fR events are supported in the embedded loop, other types of watchers might be handled in a delayed or incorrect fashion and must not be used). .PP There are primarily two reasons you would want that: work around bugs and prioritise I/O. .PP As an example for a bug workaround, the kqueue backend might only support sockets on some platform, so it is unusable as generic backend, but you still want to make use of it because you have many sockets and it scales so nicely. In this case, you would create a kqueue-based loop and embed it into your default loop (which might use e.g. poll). Overall operation will be a bit slower because first libev has to call \f(CW\*(C`poll\*(C'\fR and then \&\f(CW\*(C`kevent\*(C'\fR, but at least you can use both mechanisms for what they are best: \f(CW\*(C`kqueue\*(C'\fR for scalable sockets and \f(CW\*(C`poll\*(C'\fR if you want it to work :) .PP As for prioritising I/O: under rare circumstances you have the case where some fds have to be watched and handled very quickly (with low latency), and even priorities and idle watchers might have too much overhead. In this case you would put all the high priority stuff in one loop and all the rest in a second one, and embed the second one in the first. .PP As long as the watcher is active, the callback will be invoked every time there might be events pending in the embedded loop. The callback must then call \f(CW\*(C`ev_embed_sweep (mainloop, watcher)\*(C'\fR to make a single sweep and invoke their callbacks (the callback doesn't need to invoke the \&\f(CW\*(C`ev_embed_sweep\*(C'\fR function directly, it could also start an idle watcher to give the embedded loop strictly lower priority for example). .PP You can also set the callback to \f(CW0\fR, in which case the embed watcher will automatically execute the embedded loop sweep whenever necessary. .PP Fork detection will be handled transparently while the \f(CW\*(C`ev_embed\*(C'\fR watcher is active, i.e., the embedded loop will automatically be forked when the embedding loop forks. In other cases, the user is responsible for calling \&\f(CW\*(C`ev_loop_fork\*(C'\fR on the embedded loop. .PP Unfortunately, not all backends are embeddable: only the ones returned by \&\f(CW\*(C`ev_embeddable_backends\*(C'\fR are, which, unfortunately, does not include any portable one. .PP So when you want to use this feature you will always have to be prepared that you cannot get an embeddable loop. The recommended way to get around this is to have a separate variables for your embeddable loop, try to create it, and if that fails, use the normal loop for everything. .PP \fI\f(CI\*(C`ev_embed\*(C'\fI and fork\fR .IX Subsection "ev_embed and fork" .PP While the \f(CW\*(C`ev_embed\*(C'\fR watcher is running, forks in the embedding loop will automatically be applied to the embedded loop as well, so no special fork handling is required in that case. When the watcher is not running, however, it is still the task of the libev user to call \f(CW\*(C`ev_loop_fork ()\*(C'\fR as applicable. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" .PD 0 .IP "ev_embed_set (ev_embed *, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_set (ev_embed *, struct ev_loop *embedded_loop)" .PD Configures the watcher to embed the given loop, which must be embeddable. If the callback is \f(CW0\fR, then \f(CW\*(C`ev_embed_sweep\*(C'\fR will be invoked automatically, otherwise it is the responsibility of the callback to invoke it (it will continue to be called until the sweep has been done, if you do not want that, you need to temporarily stop the embed watcher). .IP "ev_embed_sweep (loop, ev_embed *)" 4 .IX Item "ev_embed_sweep (loop, ev_embed *)" Make a single, non-blocking sweep over the embedded loop. This works similarly to \f(CW\*(C`ev_run (embedded_loop, EVRUN_NOWAIT)\*(C'\fR, but in the most appropriate way for embedded loops. .IP "struct ev_loop *other [read\-only]" 4 .IX Item "struct ev_loop *other [read-only]" The embedded event loop. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to get an embeddable event loop and embed it into the default event loop. If that is not possible, use the default loop. The default loop is stored in \f(CW\*(C`loop_hi\*(C'\fR, while the embeddable loop is stored in \&\f(CW\*(C`loop_lo\*(C'\fR (which is \f(CW\*(C`loop_hi\*(C'\fR in the case no embeddable loop can be used). .PP .Vb 3 \& struct ev_loop *loop_hi = ev_default_init (0); \& struct ev_loop *loop_lo = 0; \& ev_embed embed; \& \& // see if there is a chance of getting one that works \& // (remember that a flags value of 0 means autodetection) \& loop_lo = ev_embeddable_backends () & ev_recommended_backends () \& ? ev_loop_new (ev_embeddable_backends () & ev_recommended_backends ()) \& : 0; \& \& // if we got one, then embed it, otherwise default to loop_hi \& if (loop_lo) \& { \& ev_embed_init (&embed, 0, loop_lo); \& ev_embed_start (loop_hi, &embed); \& } \& else \& loop_lo = loop_hi; .Ve .PP Example: Check if kqueue is available but not recommended and create a kqueue backend for use with sockets (which usually work with any kqueue implementation). Store the kqueue/socket\-only event loop in \&\f(CW\*(C`loop_socket\*(C'\fR. (One might optionally use \f(CW\*(C`EVFLAG_NOENV\*(C'\fR, too). .PP .Vb 3 \& struct ev_loop *loop = ev_default_init (0); \& struct ev_loop *loop_socket = 0; \& ev_embed embed; \& \& if (ev_supported_backends () & ~ev_recommended_backends () & EVBACKEND_KQUEUE) \& if ((loop_socket = ev_loop_new (EVBACKEND_KQUEUE)) \& { \& ev_embed_init (&embed, 0, loop_socket); \& ev_embed_start (loop, &embed); \& } \& \& if (!loop_socket) \& loop_socket = loop; \& \& // now use loop_socket for all sockets, and loop for everything else .Ve .ie n .SS """ev_fork"" \- the audacity to resume the event loop after a fork" .el .SS "\f(CWev_fork\fP \- the audacity to resume the event loop after a fork" .IX Subsection "ev_fork - the audacity to resume the event loop after a fork" Fork watchers are called when a \f(CW\*(C`fork ()\*(C'\fR was detected (usually because whoever is a good citizen cared to tell libev about it by calling \&\f(CW\*(C`ev_loop_fork\*(C'\fR). The invocation is done before the event loop blocks next and before \f(CW\*(C`ev_check\*(C'\fR watchers are being called, and only in the child after the fork. If whoever good citizen calling \f(CW\*(C`ev_default_fork\*(C'\fR cheats and calls it in the wrong process, the fork handlers will be invoked, too, of course. .PP \fIThe special problem of life after fork \- how is it possible?\fR .IX Subsection "The special problem of life after fork - how is it possible?" .PP Most uses of \f(CW\*(C`fork ()\*(C'\fR consist of forking, then some simple calls to set up/change the process environment, followed by a call to \f(CW\*(C`exec()\*(C'\fR. This sequence should be handled by libev without any problems. .PP This changes when the application actually wants to do event handling in the child, or both parent in child, in effect \*(L"continuing\*(R" after the fork. .PP The default mode of operation (for libev, with application help to detect forks) is to duplicate all the state in the child, as would be expected when \fIeither\fR the parent \fIor\fR the child process continues. .PP When both processes want to continue using libev, then this is usually the wrong result. In that case, usually one process (typically the parent) is supposed to continue with all watchers in place as before, while the other process typically wants to start fresh, i.e. without any active watchers. .PP The cleanest and most efficient way to achieve that with libev is to simply create a new event loop, which of course will be \*(L"empty\*(R", and use that for new watchers. This has the advantage of not touching more memory than necessary, and thus avoiding the copy-on-write, and the disadvantage of having to use multiple event loops (which do not support signal watchers). .PP When this is not possible, or you want to use the default loop for other reasons, then in the process that wants to start \*(L"fresh\*(R", call \&\f(CW\*(C`ev_loop_destroy (EV_DEFAULT)\*(C'\fR followed by \f(CW\*(C`ev_default_loop (...)\*(C'\fR. Destroying the default loop will \*(L"orphan\*(R" (not stop) all registered watchers, so you have to be careful not to execute code that modifies those watchers. Note also that in that case, you have to re-register any signal watchers. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_fork_init (ev_fork *, callback)" 4 .IX Item "ev_fork_init (ev_fork *, callback)" Initialises and configures the fork watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_fork_set\*(C'\fR macro, but using it is utterly pointless, really. .ie n .SS """ev_cleanup"" \- even the best things end" .el .SS "\f(CWev_cleanup\fP \- even the best things end" .IX Subsection "ev_cleanup - even the best things end" Cleanup watchers are called just before the event loop is being destroyed by a call to \f(CW\*(C`ev_loop_destroy\*(C'\fR. .PP While there is no guarantee that the event loop gets destroyed, cleanup watchers provide a convenient method to install cleanup hooks for your program, worker threads and so on \- you just to make sure to destroy the loop when you want them to be invoked. .PP Cleanup watchers are invoked in the same way as any other watcher. Unlike all other watchers, they do not keep a reference to the event loop (which makes a lot of sense if you think about it). Like all other watchers, you can call libev functions in the callback, except \f(CW\*(C`ev_cleanup_start\*(C'\fR. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_cleanup_init (ev_cleanup *, callback)" 4 .IX Item "ev_cleanup_init (ev_cleanup *, callback)" Initialises and configures the cleanup watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_cleanup_set\*(C'\fR macro, but using it is utterly pointless, I assure you. .PP Example: Register an atexit handler to destroy the default loop, so any cleanup functions are called. .PP .Vb 5 \& static void \& program_exits (void) \& { \& ev_loop_destroy (EV_DEFAULT_UC); \& } \& \& ... \& atexit (program_exits); .Ve .ie n .SS """ev_async"" \- how to wake up an event loop" .el .SS "\f(CWev_async\fP \- how to wake up an event loop" .IX Subsection "ev_async - how to wake up an event loop" In general, you cannot use an \f(CW\*(C`ev_loop\*(C'\fR from multiple threads or other asynchronous sources such as signal handlers (as opposed to multiple event loops \- those are of course safe to use in different threads). .PP Sometimes, however, you need to wake up an event loop you do not control, for example because it belongs to another thread. This is what \f(CW\*(C`ev_async\*(C'\fR watchers do: as long as the \f(CW\*(C`ev_async\*(C'\fR watcher is active, you can signal it by calling \f(CW\*(C`ev_async_send\*(C'\fR, which is thread\- and signal safe. .PP This functionality is very similar to \f(CW\*(C`ev_signal\*(C'\fR watchers, as signals, too, are asynchronous in nature, and signals, too, will be compressed (i.e. the number of callback invocations may be less than the number of \&\f(CW\*(C`ev_async_send\*(C'\fR calls). In fact, you could use signal watchers as a kind of \*(L"global async watchers\*(R" by using a watcher on an otherwise unused signal, and \f(CW\*(C`ev_feed_signal\*(C'\fR to signal this watcher from another thread, even without knowing which loop owns the signal. .PP \fIQueueing\fR .IX Subsection "Queueing" .PP \&\f(CW\*(C`ev_async\*(C'\fR does not support queueing of data in any way. The reason is that the author does not know of a simple (or any) algorithm for a multiple-writer-single-reader queue that works in all cases and doesn't need elaborate support such as pthreads or unportable memory access semantics. .PP That means that if you want to queue data, you have to provide your own queue. But at least I can tell you how to implement locking around your queue: .IP "queueing from a signal handler context" 4 .IX Item "queueing from a signal handler context" To implement race-free queueing, you simply add to the queue in the signal handler but you block the signal handler in the watcher callback. Here is an example that does that for some fictitious \s-1SIGUSR1\s0 handler: .Sp .Vb 1 \& static ev_async mysig; \& \& static void \& sigusr1_handler (void) \& { \& sometype data; \& \& // no locking etc. \& queue_put (data); \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& sometype data; \& sigset_t block, prev; \& \& sigemptyset (&block); \& sigaddset (&block, SIGUSR1); \& sigprocmask (SIG_BLOCK, &block, &prev); \& \& while (queue_get (&data)) \& process (data); \& \& if (sigismember (&prev, SIGUSR1) \& sigprocmask (SIG_UNBLOCK, &block, 0); \& } .Ve .Sp (Note: pthreads in theory requires you to use \f(CW\*(C`pthread_setmask\*(C'\fR instead of \f(CW\*(C`sigprocmask\*(C'\fR when you use threads, but libev doesn't do it either...). .IP "queueing from a thread context" 4 .IX Item "queueing from a thread context" The strategy for threads is different, as you cannot (easily) block threads but you can easily preempt them, so to queue safely you need to employ a traditional mutex lock, such as in this pthread example: .Sp .Vb 2 \& static ev_async mysig; \& static pthread_mutex_t mymutex = PTHREAD_MUTEX_INITIALIZER; \& \& static void \& otherthread (void) \& { \& // only need to lock the actual queueing operation \& pthread_mutex_lock (&mymutex); \& queue_put (data); \& pthread_mutex_unlock (&mymutex); \& \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& pthread_mutex_lock (&mymutex); \& \& while (queue_get (&data)) \& process (data); \& \& pthread_mutex_unlock (&mymutex); \& } .Ve .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_async_init (ev_async *, callback)" 4 .IX Item "ev_async_init (ev_async *, callback)" Initialises and configures the async watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_async_set\*(C'\fR macro, but using it is utterly pointless, trust me. .IP "ev_async_send (loop, ev_async *)" 4 .IX Item "ev_async_send (loop, ev_async *)" Sends/signals/activates the given \f(CW\*(C`ev_async\*(C'\fR watcher, that is, feeds an \f(CW\*(C`EV_ASYNC\*(C'\fR event on the watcher into the event loop, and instantly returns. .Sp Unlike \f(CW\*(C`ev_feed_event\*(C'\fR, this call is safe to do from other threads, signal or similar contexts (see the discussion of \f(CW\*(C`EV_ATOMIC_T\*(C'\fR in the embedding section below on what exactly this means). .Sp Note that, as with other watchers in libev, multiple events might get compressed into a single callback invocation (another way to look at this is that \f(CW\*(C`ev_async\*(C'\fR watchers are level-triggered: they are set on \&\f(CW\*(C`ev_async_send\*(C'\fR, reset when the event loop detects that). .Sp This call incurs the overhead of at most one extra system call per event loop iteration, if the event loop is blocked, and no syscall at all if the event loop (or your program) is processing events. That means that repeated calls are basically free (there is no need to avoid calls for performance reasons) and that the overhead becomes smaller (typically zero) under load. .IP "bool = ev_async_pending (ev_async *)" 4 .IX Item "bool = ev_async_pending (ev_async *)" Returns a non-zero value when \f(CW\*(C`ev_async_send\*(C'\fR has been called on the watcher but the event has not yet been processed (or even noted) by the event loop. .Sp \&\f(CW\*(C`ev_async_send\*(C'\fR sets a flag in the watcher and wakes up the loop. When the loop iterates next and checks for the watcher to have become active, it will reset the flag again. \f(CW\*(C`ev_async_pending\*(C'\fR can be used to very quickly check whether invoking the loop might be a good idea. .Sp Not that this does \fInot\fR check whether the watcher itself is pending, only whether it has been requested to make this watcher pending: there is a time window between the event loop checking and resetting the async notification, and the callback being invoked. .SH "OTHER FUNCTIONS" .IX Header "OTHER FUNCTIONS" There are some other functions of possible interest. Described. Here. Now. .IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4 .IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" This function combines a simple timer and an I/O watcher, calls your callback on whichever event happens first and automatically stops both watchers. This is useful if you want to wait for a single event on an fd or timeout without having to allocate/configure/start/stop/free one or more watchers yourself. .Sp If \f(CW\*(C`fd\*(C'\fR is less than 0, then no I/O watcher will be started and the \&\f(CW\*(C`events\*(C'\fR argument is being ignored. Otherwise, an \f(CW\*(C`ev_io\*(C'\fR watcher for the given \f(CW\*(C`fd\*(C'\fR and \f(CW\*(C`events\*(C'\fR set will be created and started. .Sp If \f(CW\*(C`timeout\*(C'\fR is less than 0, then no timeout watcher will be started. Otherwise an \f(CW\*(C`ev_timer\*(C'\fR watcher with after = \f(CW\*(C`timeout\*(C'\fR (and repeat = 0) will be started. \f(CW0\fR is a valid timeout. .Sp The callback has the type \f(CW\*(C`void (*cb)(int revents, void *arg)\*(C'\fR and is passed an \f(CW\*(C`revents\*(C'\fR set like normal event callbacks (a combination of \&\f(CW\*(C`EV_ERROR\*(C'\fR, \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or \f(CW\*(C`EV_TIMER\*(C'\fR) and the \f(CW\*(C`arg\*(C'\fR value passed to \f(CW\*(C`ev_once\*(C'\fR. Note that it is possible to receive \fIboth\fR a timeout and an io event at the same time \- you probably should give io events precedence. .Sp Example: wait up to ten seconds for data to appear on \s-1STDIN_FILENO.\s0 .Sp .Vb 7 \& static void stdin_ready (int revents, void *arg) \& { \& if (revents & EV_READ) \& /* stdin might have data for us, joy! */; \& else if (revents & EV_TIMER) \& /* doh, nothing entered */; \& } \& \& ev_once (STDIN_FILENO, EV_READ, 10., stdin_ready, 0); .Ve .IP "ev_feed_fd_event (loop, int fd, int revents)" 4 .IX Item "ev_feed_fd_event (loop, int fd, int revents)" Feed an event on the given fd, as if a file descriptor backend detected the given events. .IP "ev_feed_signal_event (loop, int signum)" 4 .IX Item "ev_feed_signal_event (loop, int signum)" Feed an event as if the given signal occurred. See also \f(CW\*(C`ev_feed_signal\*(C'\fR, which is async-safe. .SH "COMMON OR USEFUL IDIOMS (OR BOTH)" .IX Header "COMMON OR USEFUL IDIOMS (OR BOTH)" This section explains some common idioms that are not immediately obvious. Note that examples are sprinkled over the whole manual, and this section only contains stuff that wouldn't fit anywhere else. .SS "\s-1ASSOCIATING CUSTOM DATA WITH A WATCHER\s0" .IX Subsection "ASSOCIATING CUSTOM DATA WITH A WATCHER" Each watcher has, by default, a \f(CW\*(C`void *data\*(C'\fR member that you can read or modify at any time: libev will completely ignore it. This can be used to associate arbitrary data with your watcher. If you need more data and don't want to allocate memory separately and store a pointer to it in that data member, you can also \*(L"subclass\*(R" the watcher type and provide your own data: .PP .Vb 7 \& struct my_io \& { \& ev_io io; \& int otherfd; \& void *somedata; \& struct whatever *mostinteresting; \& }; \& \& ... \& struct my_io w; \& ev_io_init (&w.io, my_cb, fd, EV_READ); .Ve .PP And since your callback will be called with a pointer to the watcher, you can cast it back to your own type: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, ev_io *w_, int revents) \& { \& struct my_io *w = (struct my_io *)w_; \& ... \& } .Ve .PP More interesting and less C\-conformant ways of casting your callback function type instead have been omitted. .SS "\s-1BUILDING YOUR OWN COMPOSITE WATCHERS\s0" .IX Subsection "BUILDING YOUR OWN COMPOSITE WATCHERS" Another common scenario is to use some data structure with multiple embedded watchers, in effect creating your own watcher that combines multiple libev event sources into one \*(L"super-watcher\*(R": .PP .Vb 6 \& struct my_biggy \& { \& int some_data; \& ev_timer t1; \& ev_timer t2; \& } .Ve .PP In this case getting the pointer to \f(CW\*(C`my_biggy\*(C'\fR is a bit more complicated: Either you store the address of your \f(CW\*(C`my_biggy\*(C'\fR struct in the \f(CW\*(C`data\*(C'\fR member of the watcher (for woozies or \*(C+ coders), or you need to use some pointer arithmetic using \f(CW\*(C`offsetof\*(C'\fR inside your watchers (for real programmers): .PP .Vb 1 \& #include \& \& static void \& t1_cb (EV_P_ ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy *) \& (((char *)w) \- offsetof (struct my_biggy, t1)); \& } \& \& static void \& t2_cb (EV_P_ ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy *) \& (((char *)w) \- offsetof (struct my_biggy, t2)); \& } .Ve .SS "\s-1AVOIDING FINISHING BEFORE RETURNING\s0" .IX Subsection "AVOIDING FINISHING BEFORE RETURNING" Often you have structures like this in event-based programs: .PP .Vb 4 \& callback () \& { \& free (request); \& } \& \& request = start_new_request (..., callback); .Ve .PP The intent is to start some \*(L"lengthy\*(R" operation. The \f(CW\*(C`request\*(C'\fR could be used to cancel the operation, or do other things with it. .PP It's not uncommon to have code paths in \f(CW\*(C`start_new_request\*(C'\fR that immediately invoke the callback, for example, to report errors. Or you add some caching layer that finds that it can skip the lengthy aspects of the operation and simply invoke the callback with the result. .PP The problem here is that this will happen \fIbefore\fR \f(CW\*(C`start_new_request\*(C'\fR has returned, so \f(CW\*(C`request\*(C'\fR is not set. .PP Even if you pass the request by some safer means to the callback, you might want to do something to the request after starting it, such as canceling it, which probably isn't working so well when the callback has already been invoked. .PP A common way around all these issues is to make sure that \&\f(CW\*(C`start_new_request\*(C'\fR \fIalways\fR returns before the callback is invoked. If \&\f(CW\*(C`start_new_request\*(C'\fR immediately knows the result, it can artificially delay invoking the callback by using a \f(CW\*(C`prepare\*(C'\fR or \f(CW\*(C`idle\*(C'\fR watcher for example, or more sneakily, by reusing an existing (stopped) watcher and pushing it into the pending queue: .PP .Vb 2 \& ev_set_cb (watcher, callback); \& ev_feed_event (EV_A_ watcher, 0); .Ve .PP This way, \f(CW\*(C`start_new_request\*(C'\fR can safely return before the callback is invoked, while not delaying callback invocation too much. .SS "\s-1MODEL/NESTED EVENT LOOP INVOCATIONS AND EXIT CONDITIONS\s0" .IX Subsection "MODEL/NESTED EVENT LOOP INVOCATIONS AND EXIT CONDITIONS" Often (especially in \s-1GUI\s0 toolkits) there are places where you have \&\fImodal\fR interaction, which is most easily implemented by recursively invoking \f(CW\*(C`ev_run\*(C'\fR. .PP This brings the problem of exiting \- a callback might want to finish the main \f(CW\*(C`ev_run\*(C'\fR call, but not the nested one (e.g. user clicked \*(L"Quit\*(R", but a modal \*(L"Are you sure?\*(R" dialog is still waiting), or just the nested one and not the main one (e.g. user clocked \*(L"Ok\*(R" in a modal dialog), or some other combination: In these cases, a simple \f(CW\*(C`ev_break\*(C'\fR will not work. .PP The solution is to maintain \*(L"break this loop\*(R" variable for each \f(CW\*(C`ev_run\*(C'\fR invocation, and use a loop around \f(CW\*(C`ev_run\*(C'\fR until the condition is triggered, using \f(CW\*(C`EVRUN_ONCE\*(C'\fR: .PP .Vb 2 \& // main loop \& int exit_main_loop = 0; \& \& while (!exit_main_loop) \& ev_run (EV_DEFAULT_ EVRUN_ONCE); \& \& // in a modal watcher \& int exit_nested_loop = 0; \& \& while (!exit_nested_loop) \& ev_run (EV_A_ EVRUN_ONCE); .Ve .PP To exit from any of these loops, just set the corresponding exit variable: .PP .Vb 2 \& // exit modal loop \& exit_nested_loop = 1; \& \& // exit main program, after modal loop is finished \& exit_main_loop = 1; \& \& // exit both \& exit_main_loop = exit_nested_loop = 1; .Ve .SS "\s-1THREAD LOCKING EXAMPLE\s0" .IX Subsection "THREAD LOCKING EXAMPLE" Here is a fictitious example of how to run an event loop in a different thread from where callbacks are being invoked and watchers are created/added/removed. .PP For a real-world example, see the \f(CW\*(C`EV::Loop::Async\*(C'\fR perl module, which uses exactly this technique (which is suited for many high-level languages). .PP The example uses a pthread mutex to protect the loop data, a condition variable to wait for callback invocations, an async watcher to notify the event loop thread and an unspecified mechanism to wake up the main thread. .PP First, you need to associate some data with the event loop: .PP .Vb 6 \& typedef struct { \& mutex_t lock; /* global loop lock */ \& ev_async async_w; \& thread_t tid; \& cond_t invoke_cv; \& } userdata; \& \& void prepare_loop (EV_P) \& { \& // for simplicity, we use a static userdata struct. \& static userdata u; \& \& ev_async_init (&u\->async_w, async_cb); \& ev_async_start (EV_A_ &u\->async_w); \& \& pthread_mutex_init (&u\->lock, 0); \& pthread_cond_init (&u\->invoke_cv, 0); \& \& // now associate this with the loop \& ev_set_userdata (EV_A_ u); \& ev_set_invoke_pending_cb (EV_A_ l_invoke); \& ev_set_loop_release_cb (EV_A_ l_release, l_acquire); \& \& // then create the thread running ev_run \& pthread_create (&u\->tid, 0, l_run, EV_A); \& } .Ve .PP The callback for the \f(CW\*(C`ev_async\*(C'\fR watcher does nothing: the watcher is used solely to wake up the event loop so it takes notice of any new watchers that might have been added: .PP .Vb 5 \& static void \& async_cb (EV_P_ ev_async *w, int revents) \& { \& // just used for the side effects \& } .Ve .PP The \f(CW\*(C`l_release\*(C'\fR and \f(CW\*(C`l_acquire\*(C'\fR callbacks simply unlock/lock the mutex protecting the loop data, respectively. .PP .Vb 6 \& static void \& l_release (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& pthread_mutex_unlock (&u\->lock); \& } \& \& static void \& l_acquire (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& pthread_mutex_lock (&u\->lock); \& } .Ve .PP The event loop thread first acquires the mutex, and then jumps straight into \f(CW\*(C`ev_run\*(C'\fR: .PP .Vb 4 \& void * \& l_run (void *thr_arg) \& { \& struct ev_loop *loop = (struct ev_loop *)thr_arg; \& \& l_acquire (EV_A); \& pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0); \& ev_run (EV_A_ 0); \& l_release (EV_A); \& \& return 0; \& } .Ve .PP Instead of invoking all pending watchers, the \f(CW\*(C`l_invoke\*(C'\fR callback will signal the main thread via some unspecified mechanism (signals? pipe writes? \f(CW\*(C`Async::Interrupt\*(C'\fR?) and then waits until all pending watchers have been called (in a while loop because a) spurious wakeups are possible and b) skipping inter-thread-communication when there are no pending watchers is very beneficial): .PP .Vb 4 \& static void \& l_invoke (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& \& while (ev_pending_count (EV_A)) \& { \& wake_up_other_thread_in_some_magic_or_not_so_magic_way (); \& pthread_cond_wait (&u\->invoke_cv, &u\->lock); \& } \& } .Ve .PP Now, whenever the main thread gets told to invoke pending watchers, it will grab the lock, call \f(CW\*(C`ev_invoke_pending\*(C'\fR and then signal the loop thread to continue: .PP .Vb 4 \& static void \& real_invoke_pending (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& \& pthread_mutex_lock (&u\->lock); \& ev_invoke_pending (EV_A); \& pthread_cond_signal (&u\->invoke_cv); \& pthread_mutex_unlock (&u\->lock); \& } .Ve .PP Whenever you want to start/stop a watcher or do other modifications to an event loop, you will now have to lock: .PP .Vb 2 \& ev_timer timeout_watcher; \& userdata *u = ev_userdata (EV_A); \& \& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); \& \& pthread_mutex_lock (&u\->lock); \& ev_timer_start (EV_A_ &timeout_watcher); \& ev_async_send (EV_A_ &u\->async_w); \& pthread_mutex_unlock (&u\->lock); .Ve .PP Note that sending the \f(CW\*(C`ev_async\*(C'\fR watcher is required because otherwise an event loop currently blocking in the kernel will have no knowledge about the newly added timer. By waking up the loop it will pick up any new watchers in the next event loop iteration. .SS "\s-1THREADS, COROUTINES, CONTINUATIONS, QUEUES... INSTEAD OF CALLBACKS\s0" .IX Subsection "THREADS, COROUTINES, CONTINUATIONS, QUEUES... INSTEAD OF CALLBACKS" While the overhead of a callback that e.g. schedules a thread is small, it is still an overhead. If you embed libev, and your main usage is with some kind of threads or coroutines, you might want to customise libev so that doesn't need callbacks anymore. .PP Imagine you have coroutines that you can switch to using a function \&\f(CW\*(C`switch_to (coro)\*(C'\fR, that libev runs in a coroutine called \f(CW\*(C`libev_coro\*(C'\fR and that due to some magic, the currently active coroutine is stored in a global called \f(CW\*(C`current_coro\*(C'\fR. Then you can build your own \*(L"wait for libev event\*(R" primitive by changing \f(CW\*(C`EV_CB_DECLARE\*(C'\fR and \f(CW\*(C`EV_CB_INVOKE\*(C'\fR (note the differing \f(CW\*(C`;\*(C'\fR conventions): .PP .Vb 2 \& #define EV_CB_DECLARE(type) struct my_coro *cb; \& #define EV_CB_INVOKE(watcher) switch_to ((watcher)\->cb) .Ve .PP That means instead of having a C callback function, you store the coroutine to switch to in each watcher, and instead of having libev call your callback, you instead have it switch to that coroutine. .PP A coroutine might now wait for an event with a function called \&\f(CW\*(C`wait_for_event\*(C'\fR. (the watcher needs to be started, as always, but it doesn't matter when, or whether the watcher is active or not when this function is called): .PP .Vb 6 \& void \& wait_for_event (ev_watcher *w) \& { \& ev_set_cb (w, current_coro); \& switch_to (libev_coro); \& } .Ve .PP That basically suspends the coroutine inside \f(CW\*(C`wait_for_event\*(C'\fR and continues the libev coroutine, which, when appropriate, switches back to this or any other coroutine. .PP You can do similar tricks if you have, say, threads with an event queue \- instead of storing a coroutine, you store the queue object and instead of switching to a coroutine, you push the watcher onto the queue and notify any waiters. .PP To embed libev, see \*(L"\s-1EMBEDDING\*(R"\s0, but in short, it's easiest to create two files, \fImy_ev.h\fR and \fImy_ev.c\fR that include the respective libev files: .PP .Vb 4 \& // my_ev.h \& #define EV_CB_DECLARE(type) struct my_coro *cb; \& #define EV_CB_INVOKE(watcher) switch_to ((watcher)\->cb) \& #include "../libev/ev.h" \& \& // my_ev.c \& #define EV_H "my_ev.h" \& #include "../libev/ev.c" .Ve .PP And then use \fImy_ev.h\fR when you would normally use \fIev.h\fR, and compile \&\fImy_ev.c\fR into your project. When properly specifying include paths, you can even use \fIev.h\fR as header file name directly. .SH "LIBEVENT EMULATION" .IX Header "LIBEVENT EMULATION" Libev offers a compatibility emulation layer for libevent. It cannot emulate the internals of libevent, so here are some usage hints: .IP "\(bu" 4 Only the libevent\-1.4.1\-beta \s-1API\s0 is being emulated. .Sp This was the newest libevent version available when libev was implemented, and is still mostly unchanged in 2010. .IP "\(bu" 4 Use it by including , as usual. .IP "\(bu" 4 The following members are fully supported: ev_base, ev_callback, ev_arg, ev_fd, ev_res, ev_events. .IP "\(bu" 4 Avoid using ev_flags and the EVLIST_*\-macros, while it is maintained by libev, it does not work exactly the same way as in libevent (consider it a private \s-1API\s0). .IP "\(bu" 4 Priorities are not currently supported. Initialising priorities will fail and all watchers will have the same priority, even though there is an ev_pri field. .IP "\(bu" 4 In libevent, the last base created gets the signals, in libev, the base that registered the signal gets the signals. .IP "\(bu" 4 Other members are not supported. .IP "\(bu" 4 The libev emulation is \fInot\fR \s-1ABI\s0 compatible to libevent, you need to use the libev header file and library. .SH "\*(C+ SUPPORT" .IX Header " SUPPORT" .SS "C \s-1API\s0" .IX Subsection "C API" The normal C \s-1API\s0 should work fine when used from \*(C+: both ev.h and the libev sources can be compiled as \*(C+. Therefore, code that uses the C \s-1API\s0 will work fine. .PP Proper exception specifications might have to be added to callbacks passed to libev: exceptions may be thrown only from watcher callbacks, all other callbacks (allocator, syserr, loop acquire/release and periodic reschedule callbacks) must not throw exceptions, and might need a \f(CW\*(C`throw ()\*(C'\fR specification. If you have code that needs to be compiled as both C and \*(C+ you can use the \f(CW\*(C`EV_THROW\*(C'\fR macro for this: .PP .Vb 6 \& static void \& fatal_error (const char *msg) EV_THROW \& { \& perror (msg); \& abort (); \& } \& \& ... \& ev_set_syserr_cb (fatal_error); .Ve .PP The only \s-1API\s0 functions that can currently throw exceptions are \f(CW\*(C`ev_run\*(C'\fR, \&\f(CW\*(C`ev_invoke\*(C'\fR, \f(CW\*(C`ev_invoke_pending\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR (the latter because it runs cleanup watchers). .PP Throwing exceptions in watcher callbacks is only supported if libev itself is compiled with a \*(C+ compiler or your C and \*(C+ environments allow throwing exceptions through C libraries (most do). .SS "\*(C+ \s-1API\s0" .IX Subsection " API" Libev comes with some simplistic wrapper classes for \*(C+ that mainly allow you to use some convenience methods to start/stop watchers and also change the callback model to a model using method callbacks on objects. .PP To use it, .PP .Vb 1 \& #include .Ve .PP This automatically includes \fIev.h\fR and puts all of its definitions (many of them macros) into the global namespace. All \*(C+ specific things are put into the \f(CW\*(C`ev\*(C'\fR namespace. It should support all the same embedding options as \fIev.h\fR, most notably \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. .PP Care has been taken to keep the overhead low. The only data member the \*(C+ classes add (compared to plain C\-style watchers) is the event loop pointer that the watcher is associated with (or no additional members at all if you disable \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR when embedding libev). .PP Currently, functions, static and non-static member functions and classes with \f(CW\*(C`operator ()\*(C'\fR can be used as callbacks. Other types should be easy to add as long as they only need one additional pointer for context. If you need support for other types of functors please contact the author (preferably after implementing it). .PP For all this to work, your \*(C+ compiler either has to use the same calling conventions as your C compiler (for static member functions), or you have to embed libev and compile libev itself as \*(C+. .PP Here is a list of things available in the \f(CW\*(C`ev\*(C'\fR namespace: .ie n .IP """ev::READ"", ""ev::WRITE"" etc." 4 .el .IP "\f(CWev::READ\fR, \f(CWev::WRITE\fR etc." 4 .IX Item "ev::READ, ev::WRITE etc." These are just enum values with the same values as the \f(CW\*(C`EV_READ\*(C'\fR etc. macros from \fIev.h\fR. .ie n .IP """ev::tstamp"", ""ev::now""" 4 .el .IP "\f(CWev::tstamp\fR, \f(CWev::now\fR" 4 .IX Item "ev::tstamp, ev::now" Aliases to the same types/functions as with the \f(CW\*(C`ev_\*(C'\fR prefix. .ie n .IP """ev::io"", ""ev::timer"", ""ev::periodic"", ""ev::idle"", ""ev::sig"" etc." 4 .el .IP "\f(CWev::io\fR, \f(CWev::timer\fR, \f(CWev::periodic\fR, \f(CWev::idle\fR, \f(CWev::sig\fR etc." 4 .IX Item "ev::io, ev::timer, ev::periodic, ev::idle, ev::sig etc." For each \f(CW\*(C`ev_TYPE\*(C'\fR watcher in \fIev.h\fR there is a corresponding class of the same name in the \f(CW\*(C`ev\*(C'\fR namespace, with the exception of \f(CW\*(C`ev_signal\*(C'\fR which is called \f(CW\*(C`ev::sig\*(C'\fR to avoid clashes with the \f(CW\*(C`signal\*(C'\fR macro defined by many implementations. .Sp All of those classes have these methods: .RS 4 .IP "ev::TYPE::TYPE ()" 4 .IX Item "ev::TYPE::TYPE ()" .PD 0 .IP "ev::TYPE::TYPE (loop)" 4 .IX Item "ev::TYPE::TYPE (loop)" .IP "ev::TYPE::~TYPE" 4 .IX Item "ev::TYPE::~TYPE" .PD The constructor (optionally) takes an event loop to associate the watcher with. If it is omitted, it will use \f(CW\*(C`EV_DEFAULT\*(C'\fR. .Sp The constructor calls \f(CW\*(C`ev_init\*(C'\fR for you, which means you have to call the \&\f(CW\*(C`set\*(C'\fR method before starting it. .Sp It will not set a callback, however: You have to call the templated \f(CW\*(C`set\*(C'\fR method to set a callback before you can start the watcher. .Sp (The reason why you have to use a method is a limitation in \*(C+ which does not allow explicit template arguments for constructors). .Sp The destructor automatically stops the watcher if it is active. .IP "w\->set (object *)" 4 .IX Item "w->set (object *)" This method sets the callback method to call. The method has to have a signature of \f(CW\*(C`void (*)(ev_TYPE &, int)\*(C'\fR, it receives the watcher as first argument and the \f(CW\*(C`revents\*(C'\fR as second. The object must be given as parameter and is stored in the \f(CW\*(C`data\*(C'\fR member of the watcher. .Sp This method synthesizes efficient thunking code to call your method from the C callback that libev requires. If your compiler can inline your callback (i.e. it is visible to it at the place of the \f(CW\*(C`set\*(C'\fR call and your compiler is good :), then the method will be fully inlined into the thunking function, making it as fast as a direct C callback. .Sp Example: simple class declaration and watcher initialisation .Sp .Vb 4 \& struct myclass \& { \& void io_cb (ev::io &w, int revents) { } \& } \& \& myclass obj; \& ev::io iow; \& iow.set (&obj); .Ve .IP "w\->set (object *)" 4 .IX Item "w->set (object *)" This is a variation of a method callback \- leaving out the method to call will default the method to \f(CW\*(C`operator ()\*(C'\fR, which makes it possible to use functor objects without having to manually specify the \f(CW\*(C`operator ()\*(C'\fR all the time. Incidentally, you can then also leave out the template argument list. .Sp The \f(CW\*(C`operator ()\*(C'\fR method prototype must be \f(CW\*(C`void operator ()(watcher &w, int revents)\*(C'\fR. .Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. .Sp Example: use a functor object as callback. .Sp .Vb 7 \& struct myfunctor \& { \& void operator() (ev::io &w, int revents) \& { \& ... \& } \& } \& \& myfunctor f; \& \& ev::io w; \& w.set (&f); .Ve .IP "w\->set (void *data = 0)" 4 .IX Item "w->set (void *data = 0)" Also sets a callback, but uses a static method or plain function as callback. The optional \f(CW\*(C`data\*(C'\fR argument will be stored in the watcher's \&\f(CW\*(C`data\*(C'\fR member and is free for you to use. .Sp The prototype of the \f(CW\*(C`function\*(C'\fR must be \f(CW\*(C`void (*)(ev::TYPE &w, int)\*(C'\fR. .Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. .Sp Example: Use a plain function as callback. .Sp .Vb 2 \& static void io_cb (ev::io &w, int revents) { } \& iow.set (); .Ve .IP "w\->set (loop)" 4 .IX Item "w->set (loop)" Associates a different \f(CW\*(C`struct ev_loop\*(C'\fR with this watcher. You can only do this when the watcher is inactive (and not pending either). .IP "w\->set ([arguments])" 4 .IX Item "w->set ([arguments])" Basically the same as \f(CW\*(C`ev_TYPE_set\*(C'\fR (except for \f(CW\*(C`ev::embed\*(C'\fR watchers>), with the same arguments. Either this method or a suitable start method must be called at least once. Unlike the C counterpart, an active watcher gets automatically stopped and restarted when reconfiguring it with this method. .Sp For \f(CW\*(C`ev::embed\*(C'\fR watchers this method is called \f(CW\*(C`set_embed\*(C'\fR, to avoid clashing with the \f(CW\*(C`set (loop)\*(C'\fR method. .IP "w\->start ()" 4 .IX Item "w->start ()" Starts the watcher. Note that there is no \f(CW\*(C`loop\*(C'\fR argument, as the constructor already stores the event loop. .IP "w\->start ([arguments])" 4 .IX Item "w->start ([arguments])" Instead of calling \f(CW\*(C`set\*(C'\fR and \f(CW\*(C`start\*(C'\fR methods separately, it is often convenient to wrap them in one call. Uses the same type of arguments as the configure \f(CW\*(C`set\*(C'\fR method of the watcher. .IP "w\->stop ()" 4 .IX Item "w->stop ()" Stops the watcher if it is active. Again, no \f(CW\*(C`loop\*(C'\fR argument. .ie n .IP "w\->again () (""ev::timer"", ""ev::periodic"" only)" 4 .el .IP "w\->again () (\f(CWev::timer\fR, \f(CWev::periodic\fR only)" 4 .IX Item "w->again () (ev::timer, ev::periodic only)" For \f(CW\*(C`ev::timer\*(C'\fR and \f(CW\*(C`ev::periodic\*(C'\fR, this invokes the corresponding \&\f(CW\*(C`ev_TYPE_again\*(C'\fR function. .ie n .IP "w\->sweep () (""ev::embed"" only)" 4 .el .IP "w\->sweep () (\f(CWev::embed\fR only)" 4 .IX Item "w->sweep () (ev::embed only)" Invokes \f(CW\*(C`ev_embed_sweep\*(C'\fR. .ie n .IP "w\->update () (""ev::stat"" only)" 4 .el .IP "w\->update () (\f(CWev::stat\fR only)" 4 .IX Item "w->update () (ev::stat only)" Invokes \f(CW\*(C`ev_stat_stat\*(C'\fR. .RE .RS 4 .RE .PP Example: Define a class with two I/O and idle watchers, start the I/O watchers in the constructor. .PP .Vb 5 \& class myclass \& { \& ev::io io ; void io_cb (ev::io &w, int revents); \& ev::io io2 ; void io2_cb (ev::io &w, int revents); \& ev::idle idle; void idle_cb (ev::idle &w, int revents); \& \& myclass (int fd) \& { \& io .set (this); \& io2 .set (this); \& idle.set (this); \& \& io.set (fd, ev::WRITE); // configure the watcher \& io.start (); // start it whenever convenient \& \& io2.start (fd, ev::READ); // set + start in one call \& } \& }; .Ve .SH "OTHER LANGUAGE BINDINGS" .IX Header "OTHER LANGUAGE BINDINGS" Libev does not offer other language bindings itself, but bindings for a number of languages exist in the form of third-party packages. If you know any interesting language binding in addition to the ones listed here, drop me a note. .IP "Perl" 4 .IX Item "Perl" The \s-1EV\s0 module implements the full libev \s-1API\s0 and is actually used to test libev. \s-1EV\s0 is developed together with libev. Apart from the \s-1EV\s0 core module, there are additional modules that implement libev-compatible interfaces to \f(CW\*(C`libadns\*(C'\fR (\f(CW\*(C`EV::ADNS\*(C'\fR, but \f(CW\*(C`AnyEvent::DNS\*(C'\fR is preferred nowadays), \&\f(CW\*(C`Net::SNMP\*(C'\fR (\f(CW\*(C`Net::SNMP::EV\*(C'\fR) and the \f(CW\*(C`libglib\*(C'\fR event core (\f(CW\*(C`Glib::EV\*(C'\fR and \f(CW\*(C`EV::Glib\*(C'\fR). .Sp It can be found and installed via \s-1CPAN,\s0 its homepage is at . .IP "Python" 4 .IX Item "Python" Python bindings can be found at . It seems to be quite complete and well-documented. .IP "Ruby" 4 .IX Item "Ruby" Tony Arcieri has written a ruby extension that offers access to a subset of the libev \s-1API\s0 and adds file handle abstractions, asynchronous \s-1DNS\s0 and more on top of it. It can be found via gem servers. Its homepage is at . .Sp Roger Pack reports that using the link order \f(CW\*(C`\-lws2_32 \-lmsvcrt\-ruby\-190\*(C'\fR makes rev work even on mingw. .IP "Haskell" 4 .IX Item "Haskell" A haskell binding to libev is available at . .IP "D" 4 .IX Item "D" Leandro Lucarella has written a D language binding (\fIev.d\fR) for libev, to be found at . .IP "Ocaml" 4 .IX Item "Ocaml" Erkki Seppala has written Ocaml bindings for libev, to be found at . .IP "Lua" 4 .IX Item "Lua" Brian Maher has written a partial interface to libev for lua (at the time of this writing, only \f(CW\*(C`ev_io\*(C'\fR and \f(CW\*(C`ev_timer\*(C'\fR), to be found at . .IP "Javascript" 4 .IX Item "Javascript" Node.js () uses libev as the underlying event library. .IP "Others" 4 .IX Item "Others" There are others, and I stopped counting. .SH "MACRO MAGIC" .IX Header "MACRO MAGIC" Libev can be compiled with a variety of options, the most fundamental of which is \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. This option determines whether (most) functions and callbacks have an initial \f(CW\*(C`struct ev_loop *\*(C'\fR argument. .PP To make it easier to write programs that cope with either variant, the following macros are defined: .ie n .IP """EV_A"", ""EV_A_""" 4 .el .IP "\f(CWEV_A\fR, \f(CWEV_A_\fR" 4 .IX Item "EV_A, EV_A_" This provides the loop \fIargument\fR for functions, if one is required (\*(L"ev loop argument\*(R"). The \f(CW\*(C`EV_A\*(C'\fR form is used when this is the sole argument, \&\f(CW\*(C`EV_A_\*(C'\fR is used when other arguments are following. Example: .Sp .Vb 3 \& ev_unref (EV_A); \& ev_timer_add (EV_A_ watcher); \& ev_run (EV_A_ 0); .Ve .Sp It assumes the variable \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR is in scope, which is often provided by the following macro. .ie n .IP """EV_P"", ""EV_P_""" 4 .el .IP "\f(CWEV_P\fR, \f(CWEV_P_\fR" 4 .IX Item "EV_P, EV_P_" This provides the loop \fIparameter\fR for functions, if one is required (\*(L"ev loop parameter\*(R"). The \f(CW\*(C`EV_P\*(C'\fR form is used when this is the sole parameter, \&\f(CW\*(C`EV_P_\*(C'\fR is used when other parameters are following. Example: .Sp .Vb 2 \& // this is how ev_unref is being declared \& static void ev_unref (EV_P); \& \& // this is how you can declare your typical callback \& static void cb (EV_P_ ev_timer *w, int revents) .Ve .Sp It declares a parameter \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR, quite suitable for use with \f(CW\*(C`EV_A\*(C'\fR. .ie n .IP """EV_DEFAULT"", ""EV_DEFAULT_""" 4 .el .IP "\f(CWEV_DEFAULT\fR, \f(CWEV_DEFAULT_\fR" 4 .IX Item "EV_DEFAULT, EV_DEFAULT_" Similar to the other two macros, this gives you the value of the default loop, if multiple loops are supported (\*(L"ev loop default\*(R"). The default loop will be initialised if it isn't already initialised. .Sp For non-multiplicity builds, these macros do nothing, so you always have to initialise the loop somewhere. .ie n .IP """EV_DEFAULT_UC"", ""EV_DEFAULT_UC_""" 4 .el .IP "\f(CWEV_DEFAULT_UC\fR, \f(CWEV_DEFAULT_UC_\fR" 4 .IX Item "EV_DEFAULT_UC, EV_DEFAULT_UC_" Usage identical to \f(CW\*(C`EV_DEFAULT\*(C'\fR and \f(CW\*(C`EV_DEFAULT_\*(C'\fR, but requires that the default loop has been initialised (\f(CW\*(C`UC\*(C'\fR == unchecked). Their behaviour is undefined when the default loop has not been initialised by a previous execution of \f(CW\*(C`EV_DEFAULT\*(C'\fR, \f(CW\*(C`EV_DEFAULT_\*(C'\fR or \f(CW\*(C`ev_default_init (...)\*(C'\fR. .Sp It is often prudent to use \f(CW\*(C`EV_DEFAULT\*(C'\fR when initialising the first watcher in a function but use \f(CW\*(C`EV_DEFAULT_UC\*(C'\fR afterwards. .PP Example: Declare and initialise a check watcher, utilising the above macros so it will work regardless of whether multiple loops are supported or not. .PP .Vb 5 \& static void \& check_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_check_stop (EV_A_ w); \& } \& \& ev_check check; \& ev_check_init (&check, check_cb); \& ev_check_start (EV_DEFAULT_ &check); \& ev_run (EV_DEFAULT_ 0); .Ve .SH "EMBEDDING" .IX Header "EMBEDDING" Libev can (and often is) directly embedded into host applications. Examples of applications that embed it include the Deliantra Game Server, the \s-1EV\s0 perl module, the \s-1GNU\s0 Virtual Private Ethernet (gvpe) and rxvt-unicode. .PP The goal is to enable you to just copy the necessary files into your source directory without having to change even a single line in them, so you can easily upgrade by simply copying (or having a checked-out copy of libev somewhere in your source tree). .SS "\s-1FILESETS\s0" .IX Subsection "FILESETS" Depending on what features you need you need to include one or more sets of files in your application. .PP \fI\s-1CORE EVENT LOOP\s0\fR .IX Subsection "CORE EVENT LOOP" .PP To include only the libev core (all the \f(CW\*(C`ev_*\*(C'\fR functions), with manual configuration (no autoconf): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.c" .Ve .PP This will automatically include \fIev.h\fR, too, and should be done in a single C source file only to provide the function implementations. To use it, do the same for \fIev.h\fR in all files wishing to use this \s-1API \s0(best done by writing a wrapper around \fIev.h\fR that you can include instead and where you can put other configuration options): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.h" .Ve .PP Both header files and implementation files can be compiled with a \*(C+ compiler (at least, that's a stated goal, and breakage will be treated as a bug). .PP You need the following files in your source tree, or in a directory in your include path (e.g. in libev/ when using \-Ilibev): .PP .Vb 4 \& ev.h \& ev.c \& ev_vars.h \& ev_wrap.h \& \& ev_win32.c required on win32 platforms only \& \& ev_select.c only when select backend is enabled (which is enabled by default) \& ev_poll.c only when poll backend is enabled (disabled by default) \& ev_epoll.c only when the epoll backend is enabled (disabled by default) \& ev_kqueue.c only when the kqueue backend is enabled (disabled by default) \& ev_port.c only when the solaris port backend is enabled (disabled by default) .Ve .PP \&\fIev.c\fR includes the backend files directly when enabled, so you only need to compile this single file. .PP \fI\s-1LIBEVENT COMPATIBILITY API\s0\fR .IX Subsection "LIBEVENT COMPATIBILITY API" .PP To include the libevent compatibility \s-1API,\s0 also include: .PP .Vb 1 \& #include "event.c" .Ve .PP in the file including \fIev.c\fR, and: .PP .Vb 1 \& #include "event.h" .Ve .PP in the files that want to use the libevent \s-1API.\s0 This also includes \fIev.h\fR. .PP You need the following additional files for this: .PP .Vb 2 \& event.h \& event.c .Ve .PP \fI\s-1AUTOCONF SUPPORT\s0\fR .IX Subsection "AUTOCONF SUPPORT" .PP Instead of using \f(CW\*(C`EV_STANDALONE=1\*(C'\fR and providing your configuration in whatever way you want, you can also \f(CW\*(C`m4_include([libev.m4])\*(C'\fR in your \&\fIconfigure.ac\fR and leave \f(CW\*(C`EV_STANDALONE\*(C'\fR undefined. \fIev.c\fR will then include \fIconfig.h\fR and configure itself accordingly. .PP For this of course you need the m4 file: .PP .Vb 1 \& libev.m4 .Ve .SS "\s-1PREPROCESSOR SYMBOLS/MACROS\s0" .IX Subsection "PREPROCESSOR SYMBOLS/MACROS" Libev can be configured via a variety of preprocessor symbols you have to define before including (or compiling) any of its files. The default in the absence of autoconf is documented for every option. .PP Symbols marked with \*(L"(h)\*(R" do not change the \s-1ABI,\s0 and can have different values when compiling libev vs. including \fIev.h\fR, so it is permissible to redefine them before including \fIev.h\fR without breaking compatibility to a compiled library. All other symbols change the \s-1ABI,\s0 which means all users of libev and the libev code itself must be compiled with compatible settings. .IP "\s-1EV_COMPAT3 \s0(h)" 4 .IX Item "EV_COMPAT3 (h)" Backwards compatibility is a major concern for libev. This is why this release of libev comes with wrappers for the functions and symbols that have been renamed between libev version 3 and 4. .Sp You can disable these wrappers (to test compatibility with future versions) by defining \f(CW\*(C`EV_COMPAT3\*(C'\fR to \f(CW0\fR when compiling your sources. This has the additional advantage that you can drop the \f(CW\*(C`struct\*(C'\fR from \f(CW\*(C`struct ev_loop\*(C'\fR declarations, as libev will provide an \f(CW\*(C`ev_loop\*(C'\fR typedef in that case. .Sp In some future version, the default for \f(CW\*(C`EV_COMPAT3\*(C'\fR will become \f(CW0\fR, and in some even more future version the compatibility code will be removed completely. .IP "\s-1EV_STANDALONE \s0(h)" 4 .IX Item "EV_STANDALONE (h)" Must always be \f(CW1\fR if you do not use autoconf configuration, which keeps libev from including \fIconfig.h\fR, and it also defines dummy implementations for some libevent functions (such as logging, which is not supported). It will also not define any of the structs usually found in \&\fIevent.h\fR that are not directly supported by the libev core alone. .Sp In standalone mode, libev will still try to automatically deduce the configuration, but has to be more conservative. .IP "\s-1EV_USE_FLOOR\s0" 4 .IX Item "EV_USE_FLOOR" If defined to be \f(CW1\fR, libev will use the \f(CW\*(C`floor ()\*(C'\fR function for its periodic reschedule calculations, otherwise libev will fall back on a portable (slower) implementation. If you enable this, you usually have to link against libm or something equivalent. Enabling this when the \f(CW\*(C`floor\*(C'\fR function is not available will fail, so the safe default is to not enable this. .IP "\s-1EV_USE_MONOTONIC\s0" 4 .IX Item "EV_USE_MONOTONIC" If defined to be \f(CW1\fR, libev will try to detect the availability of the monotonic clock option at both compile time and runtime. Otherwise no use of the monotonic clock option will be attempted. If you enable this, you usually have to link against librt or something similar. Enabling it when the functionality isn't available is safe, though, although you have to make sure you link against any libraries where the \f(CW\*(C`clock_gettime\*(C'\fR function is hiding in (often \fI\-lrt\fR). See also \f(CW\*(C`EV_USE_CLOCK_SYSCALL\*(C'\fR. .IP "\s-1EV_USE_REALTIME\s0" 4 .IX Item "EV_USE_REALTIME" If defined to be \f(CW1\fR, libev will try to detect the availability of the real-time clock option at compile time (and assume its availability at runtime if successful). Otherwise no use of the real-time clock option will be attempted. This effectively replaces \f(CW\*(C`gettimeofday\*(C'\fR by \f(CW\*(C`clock_get (CLOCK_REALTIME, ...)\*(C'\fR and will not normally affect correctness. See the note about libraries in the description of \&\f(CW\*(C`EV_USE_MONOTONIC\*(C'\fR, though. Defaults to the opposite value of \&\f(CW\*(C`EV_USE_CLOCK_SYSCALL\*(C'\fR. .IP "\s-1EV_USE_CLOCK_SYSCALL\s0" 4 .IX Item "EV_USE_CLOCK_SYSCALL" If defined to be \f(CW1\fR, libev will try to use a direct syscall instead of calling the system-provided \f(CW\*(C`clock_gettime\*(C'\fR function. This option exists because on GNU/Linux, \f(CW\*(C`clock_gettime\*(C'\fR is in \f(CW\*(C`librt\*(C'\fR, but \f(CW\*(C`librt\*(C'\fR unconditionally pulls in \f(CW\*(C`libpthread\*(C'\fR, slowing down single-threaded programs needlessly. Using a direct syscall is slightly slower (in theory), because no optimised vdso implementation can be used, but avoids the pthread dependency. Defaults to \f(CW1\fR on GNU/Linux with glibc 2.x or higher, as it simplifies linking (no need for \f(CW\*(C`\-lrt\*(C'\fR). .IP "\s-1EV_USE_NANOSLEEP\s0" 4 .IX Item "EV_USE_NANOSLEEP" If defined to be \f(CW1\fR, libev will assume that \f(CW\*(C`nanosleep ()\*(C'\fR is available and will use it for delays. Otherwise it will use \f(CW\*(C`select ()\*(C'\fR. .IP "\s-1EV_USE_EVENTFD\s0" 4 .IX Item "EV_USE_EVENTFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`eventfd ()\*(C'\fR is available and will probe for kernel support at runtime. This will improve \&\f(CW\*(C`ev_signal\*(C'\fR and \f(CW\*(C`ev_async\*(C'\fR performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. .IP "\s-1EV_USE_SELECT\s0" 4 .IX Item "EV_USE_SELECT" If undefined or defined to be \f(CW1\fR, libev will compile in support for the \&\f(CW\*(C`select\*(C'\fR(2) backend. No attempt at auto-detection will be done: if no other method takes over, select will be it. Otherwise the select backend will not be compiled in. .IP "\s-1EV_SELECT_USE_FD_SET\s0" 4 .IX Item "EV_SELECT_USE_FD_SET" If defined to \f(CW1\fR, then the select backend will use the system \f(CW\*(C`fd_set\*(C'\fR structure. This is useful if libev doesn't compile due to a missing \&\f(CW\*(C`NFDBITS\*(C'\fR or \f(CW\*(C`fd_mask\*(C'\fR definition or it mis-guesses the bitset layout on exotic systems. This usually limits the range of file descriptors to some low limit such as 1024 or might have other limitations (winsocket only allows 64 sockets). The \f(CW\*(C`FD_SETSIZE\*(C'\fR macro, set before compilation, configures the maximum size of the \f(CW\*(C`fd_set\*(C'\fR. .IP "\s-1EV_SELECT_IS_WINSOCKET\s0" 4 .IX Item "EV_SELECT_IS_WINSOCKET" When defined to \f(CW1\fR, the select backend will assume that select/socket/connect etc. don't understand file descriptors but wants osf handles on win32 (this is the case when the select to be used is the winsock select). This means that it will call \&\f(CW\*(C`_get_osfhandle\*(C'\fR on the fd to convert it to an \s-1OS\s0 handle. Otherwise, it is assumed that all these functions actually work on fds, even on win32. Should not be defined on non\-win32 platforms. .IP "\s-1EV_FD_TO_WIN32_HANDLE\s0(fd)" 4 .IX Item "EV_FD_TO_WIN32_HANDLE(fd)" If \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR is enabled, then libev needs a way to map file descriptors to socket handles. When not defining this symbol (the default), then libev will call \f(CW\*(C`_get_osfhandle\*(C'\fR, which is usually correct. In some cases, programs use their own file descriptor management, in which case they can provide this function to map fds to socket handles. .IP "\s-1EV_WIN32_HANDLE_TO_FD\s0(handle)" 4 .IX Item "EV_WIN32_HANDLE_TO_FD(handle)" If \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR then libev maps handles to file descriptors using the standard \f(CW\*(C`_open_osfhandle\*(C'\fR function. For programs implementing their own fd to handle mapping, overwriting this function makes it easier to do so. This can be done by defining this macro to an appropriate value. .IP "\s-1EV_WIN32_CLOSE_FD\s0(fd)" 4 .IX Item "EV_WIN32_CLOSE_FD(fd)" If programs implement their own fd to handle mapping on win32, then this macro can be used to override the \f(CW\*(C`close\*(C'\fR function, useful to unregister file descriptors again. Note that the replacement function has to close the underlying \s-1OS\s0 handle. .IP "\s-1EV_USE_WSASOCKET\s0" 4 .IX Item "EV_USE_WSASOCKET" If defined to be \f(CW1\fR, libev will use \f(CW\*(C`WSASocket\*(C'\fR to create its internal communication socket, which works better in some environments. Otherwise, the normal \f(CW\*(C`socket\*(C'\fR function will be used, which works better in other environments. .IP "\s-1EV_USE_POLL\s0" 4 .IX Item "EV_USE_POLL" If defined to be \f(CW1\fR, libev will compile in support for the \f(CW\*(C`poll\*(C'\fR(2) backend. Otherwise it will be enabled on non\-win32 platforms. It takes precedence over select. .IP "\s-1EV_USE_EPOLL\s0" 4 .IX Item "EV_USE_EPOLL" If defined to be \f(CW1\fR, libev will compile in support for the Linux \&\f(CW\*(C`epoll\*(C'\fR(7) backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for GNU/Linux systems. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_USE_KQUEUE\s0" 4 .IX Item "EV_USE_KQUEUE" If defined to be \f(CW1\fR, libev will compile in support for the \s-1BSD\s0 style \&\f(CW\*(C`kqueue\*(C'\fR(2) backend. Its actual availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for \s-1BSD\s0 and BSD-like systems, although on most BSDs kqueue only supports some types of fds correctly (the only platform we found that supports ptys for example was NetBSD), so kqueue might be compiled in, but not be used unless explicitly requested. The best way to use it is to find out whether kqueue supports your type of fd properly and use an embedded kqueue loop. .IP "\s-1EV_USE_PORT\s0" 4 .IX Item "EV_USE_PORT" If defined to be \f(CW1\fR, libev will compile in support for the Solaris 10 port style backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for Solaris 10 systems. .IP "\s-1EV_USE_DEVPOLL\s0" 4 .IX Item "EV_USE_DEVPOLL" Reserved for future expansion, works like the \s-1USE\s0 symbols above. .IP "\s-1EV_USE_INOTIFY\s0" 4 .IX Item "EV_USE_INOTIFY" If defined to be \f(CW1\fR, libev will compile in support for the Linux inotify interface to speed up \f(CW\*(C`ev_stat\*(C'\fR watchers. Its actual availability will be detected at runtime. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_NO_SMP\s0" 4 .IX Item "EV_NO_SMP" If defined to be \f(CW1\fR, libev will assume that memory is always coherent between threads, that is, threads can be used, but threads never run on different cpus (or different cpu cores). This reduces dependencies and makes libev faster. .IP "\s-1EV_NO_THREADS\s0" 4 .IX Item "EV_NO_THREADS" If defined to be \f(CW1\fR, libev will assume that it will never be called from different threads (that includes signal handlers), which is a stronger assumption than \f(CW\*(C`EV_NO_SMP\*(C'\fR, above. This reduces dependencies and makes libev faster. .IP "\s-1EV_ATOMIC_T\s0" 4 .IX Item "EV_ATOMIC_T" Libev requires an integer type (suitable for storing \f(CW0\fR or \f(CW1\fR) whose access is atomic with respect to other threads or signal contexts. No such type is easily found in the C language, so you can provide your own type that you know is safe for your purposes. It is used both for signal handler \*(L"locking\*(R" as well as for signal and thread safety in \f(CW\*(C`ev_async\*(C'\fR watchers. .Sp In the absence of this define, libev will use \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (from \fIsignal.h\fR), which is usually good enough on most platforms. .IP "\s-1EV_H \s0(h)" 4 .IX Item "EV_H (h)" The name of the \fIev.h\fR header file used to include it. The default if undefined is \f(CW"ev.h"\fR in \fIevent.h\fR, \fIev.c\fR and \fIev++.h\fR. This can be used to virtually rename the \fIev.h\fR header file in case of conflicts. .IP "\s-1EV_CONFIG_H \s0(h)" 4 .IX Item "EV_CONFIG_H (h)" If \f(CW\*(C`EV_STANDALONE\*(C'\fR isn't \f(CW1\fR, this variable can be used to override \&\fIev.c\fR's idea of where to find the \fIconfig.h\fR file, similarly to \&\f(CW\*(C`EV_H\*(C'\fR, above. .IP "\s-1EV_EVENT_H \s0(h)" 4 .IX Item "EV_EVENT_H (h)" Similarly to \f(CW\*(C`EV_H\*(C'\fR, this macro can be used to override \fIevent.c\fR's idea of how the \fIevent.h\fR header can be found, the default is \f(CW"event.h"\fR. .IP "\s-1EV_PROTOTYPES \s0(h)" 4 .IX Item "EV_PROTOTYPES (h)" If defined to be \f(CW0\fR, then \fIev.h\fR will not define any function prototypes, but still define all the structs and other symbols. This is occasionally useful if you want to provide your own wrapper functions around libev functions. .IP "\s-1EV_MULTIPLICITY\s0" 4 .IX Item "EV_MULTIPLICITY" If undefined or defined to \f(CW1\fR, then all event-loop-specific functions will have the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument, and you can create additional independent event loops. Otherwise there will be no support for multiple event loops and there is no first event loop pointer argument. Instead, all functions act on the single default loop. .Sp Note that \f(CW\*(C`EV_DEFAULT\*(C'\fR and \f(CW\*(C`EV_DEFAULT_\*(C'\fR will no longer provide a default loop when multiplicity is switched off \- you always have to initialise the loop manually in this case. .IP "\s-1EV_MINPRI\s0" 4 .IX Item "EV_MINPRI" .PD 0 .IP "\s-1EV_MAXPRI\s0" 4 .IX Item "EV_MAXPRI" .PD The range of allowed priorities. \f(CW\*(C`EV_MINPRI\*(C'\fR must be smaller or equal to \&\f(CW\*(C`EV_MAXPRI\*(C'\fR, but otherwise there are no non-obvious limitations. You can provide for more priorities by overriding those symbols (usually defined to be \f(CW\*(C`\-2\*(C'\fR and \f(CW2\fR, respectively). .Sp When doing priority-based operations, libev usually has to linearly search all the priorities, so having many of them (hundreds) uses a lot of space and time, so using the defaults of five priorities (\-2 .. +2) is usually fine. .Sp If your embedding application does not need any priorities, defining these both to \f(CW0\fR will save some memory and \s-1CPU.\s0 .IP "\s-1EV_PERIODIC_ENABLE, EV_IDLE_ENABLE, EV_EMBED_ENABLE, EV_STAT_ENABLE, EV_PREPARE_ENABLE, EV_CHECK_ENABLE, EV_FORK_ENABLE, EV_SIGNAL_ENABLE, EV_ASYNC_ENABLE, EV_CHILD_ENABLE.\s0" 4 .IX Item "EV_PERIODIC_ENABLE, EV_IDLE_ENABLE, EV_EMBED_ENABLE, EV_STAT_ENABLE, EV_PREPARE_ENABLE, EV_CHECK_ENABLE, EV_FORK_ENABLE, EV_SIGNAL_ENABLE, EV_ASYNC_ENABLE, EV_CHILD_ENABLE." If undefined or defined to be \f(CW1\fR (and the platform supports it), then the respective watcher type is supported. If defined to be \f(CW0\fR, then it is not. Disabling watcher types mainly saves code size. .IP "\s-1EV_FEATURES\s0" 4 .IX Item "EV_FEATURES" If you need to shave off some kilobytes of code at the expense of some speed (but with the full \s-1API\s0), you can define this symbol to request certain subsets of functionality. The default is to enable all features that can be enabled on the platform. .Sp A typical way to use this symbol is to define it to \f(CW0\fR (or to a bitset with some broad features you want) and then selectively re-enable additional parts you want, for example if you want everything minimal, but multiple event loop support, async and child watchers and the poll backend, use this: .Sp .Vb 5 \& #define EV_FEATURES 0 \& #define EV_MULTIPLICITY 1 \& #define EV_USE_POLL 1 \& #define EV_CHILD_ENABLE 1 \& #define EV_ASYNC_ENABLE 1 .Ve .Sp The actual value is a bitset, it can be a combination of the following values (by default, all of these are enabled): .RS 4 .ie n .IP "1 \- faster/larger code" 4 .el .IP "\f(CW1\fR \- faster/larger code" 4 .IX Item "1 - faster/larger code" Use larger code to speed up some operations. .Sp Currently this is used to override some inlining decisions (enlarging the code size by roughly 30% on amd64). .Sp When optimising for size, use of compiler flags such as \f(CW\*(C`\-Os\*(C'\fR with gcc is recommended, as well as \f(CW\*(C`\-DNDEBUG\*(C'\fR, as libev contains a number of assertions. .Sp The default is off when \f(CW\*(C`_\|_OPTIMIZE_SIZE_\|_\*(C'\fR is defined by your compiler (e.g. gcc with \f(CW\*(C`\-Os\*(C'\fR). .ie n .IP "2 \- faster/larger data structures" 4 .el .IP "\f(CW2\fR \- faster/larger data structures" 4 .IX Item "2 - faster/larger data structures" Replaces the small 2\-heap for timer management by a faster 4\-heap, larger hash table sizes and so on. This will usually further increase code size and can additionally have an effect on the size of data structures at runtime. .Sp The default is off when \f(CW\*(C`_\|_OPTIMIZE_SIZE_\|_\*(C'\fR is defined by your compiler (e.g. gcc with \f(CW\*(C`\-Os\*(C'\fR). .ie n .IP "4 \- full \s-1API\s0 configuration" 4 .el .IP "\f(CW4\fR \- full \s-1API\s0 configuration" 4 .IX Item "4 - full API configuration" This enables priorities (sets \f(CW\*(C`EV_MAXPRI\*(C'\fR=2 and \f(CW\*(C`EV_MINPRI\*(C'\fR=\-2), and enables multiplicity (\f(CW\*(C`EV_MULTIPLICITY\*(C'\fR=1). .ie n .IP "8 \- full \s-1API\s0" 4 .el .IP "\f(CW8\fR \- full \s-1API\s0" 4 .IX Item "8 - full API" This enables a lot of the \*(L"lesser used\*(R" \s-1API\s0 functions. See \f(CW\*(C`ev.h\*(C'\fR for details on which parts of the \s-1API\s0 are still available without this feature, and do not complain if this subset changes over time. .ie n .IP "16 \- enable all optional watcher types" 4 .el .IP "\f(CW16\fR \- enable all optional watcher types" 4 .IX Item "16 - enable all optional watcher types" Enables all optional watcher types. If you want to selectively enable only some watcher types other than I/O and timers (e.g. prepare, embed, async, child...) you can enable them manually by defining \&\f(CW\*(C`EV_watchertype_ENABLE\*(C'\fR to \f(CW1\fR instead. .ie n .IP "32 \- enable all backends" 4 .el .IP "\f(CW32\fR \- enable all backends" 4 .IX Item "32 - enable all backends" This enables all backends \- without this feature, you need to enable at least one backend manually (\f(CW\*(C`EV_USE_SELECT\*(C'\fR is a good choice). .ie n .IP "64 \- enable OS-specific ""helper"" APIs" 4 .el .IP "\f(CW64\fR \- enable OS-specific ``helper'' APIs" 4 .IX Item "64 - enable OS-specific helper APIs" Enable inotify, eventfd, signalfd and similar OS-specific helper APIs by default. .RE .RS 4 .Sp Compiling with \f(CW\*(C`gcc \-Os \-DEV_STANDALONE \-DEV_USE_EPOLL=1 \-DEV_FEATURES=0\*(C'\fR reduces the compiled size of libev from 24.7Kb code/2.8Kb data to 6.5Kb code/0.3Kb data on my GNU/Linux amd64 system, while still giving you I/O watchers, timers and monotonic clock support. .Sp With an intelligent-enough linker (gcc+binutils are intelligent enough when you use \f(CW\*(C`\-Wl,\-\-gc\-sections \-ffunction\-sections\*(C'\fR) functions unused by your program might be left out as well \- a binary starting a timer and an I/O watcher then might come out at only 5Kb. .RE .IP "\s-1EV_API_STATIC\s0" 4 .IX Item "EV_API_STATIC" If this symbol is defined (by default it is not), then all identifiers will have static linkage. This means that libev will not export any identifiers, and you cannot link against libev anymore. This can be useful when you embed libev, only want to use libev functions in a single file, and do not want its identifiers to be visible. .Sp To use this, define \f(CW\*(C`EV_API_STATIC\*(C'\fR and include \fIev.c\fR in the file that wants to use libev. .Sp This option only works when libev is compiled with a C compiler, as \*(C+ doesn't support the required declaration syntax. .IP "\s-1EV_AVOID_STDIO\s0" 4 .IX Item "EV_AVOID_STDIO" If this is set to \f(CW1\fR at compiletime, then libev will avoid using stdio functions (printf, scanf, perror etc.). This will increase the code size somewhat, but if your program doesn't otherwise depend on stdio and your libc allows it, this avoids linking in the stdio library which is quite big. .Sp Note that error messages might become less precise when this option is enabled. .IP "\s-1EV_NSIG\s0" 4 .IX Item "EV_NSIG" The highest supported signal number, +1 (or, the number of signals): Normally, libev tries to deduce the maximum number of signals automatically, but sometimes this fails, in which case it can be specified. Also, using a lower number than detected (\f(CW32\fR should be good for about any system in existence) can save some memory, as libev statically allocates some 12\-24 bytes per signal number. .IP "\s-1EV_PID_HASHSIZE\s0" 4 .IX Item "EV_PID_HASHSIZE" \&\f(CW\*(C`ev_child\*(C'\fR watchers use a small hash table to distribute workload by pid. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_FEATURES\*(C'\fR disabled), usually more than enough. If you need to manage thousands of children you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_INOTIFY_HASHSIZE\s0" 4 .IX Item "EV_INOTIFY_HASHSIZE" \&\f(CW\*(C`ev_stat\*(C'\fR watchers use a small hash table to distribute workload by inotify watch id. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_FEATURES\*(C'\fR disabled), usually more than enough. If you need to manage thousands of \&\f(CW\*(C`ev_stat\*(C'\fR watchers you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_USE_4HEAP\s0" 4 .IX Item "EV_USE_4HEAP" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heaps, libev uses a 4\-heap when this symbol is defined to \f(CW1\fR. The 4\-heap uses more complicated (longer) code but has noticeably faster performance with many (thousands) of watchers. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_HEAP_CACHE_AT\s0" 4 .IX Item "EV_HEAP_CACHE_AT" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heaps, libev can cache the timestamp (\fIat\fR) within the heap structure (selected by defining \f(CW\*(C`EV_HEAP_CACHE_AT\*(C'\fR to \f(CW1\fR), which uses 8\-12 bytes more per watcher and a few hundred bytes more code, but avoids random read accesses on heap changes. This improves performance noticeably with many (hundreds) of watchers. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_VERIFY\s0" 4 .IX Item "EV_VERIFY" Controls how much internal verification (see \f(CW\*(C`ev_verify ()\*(C'\fR) will be done: If set to \f(CW0\fR, no internal verification code will be compiled in. If set to \f(CW1\fR, then verification code will be compiled in, but not called. If set to \f(CW2\fR, then the internal verification code will be called once per loop, which can slow down libev. If set to \f(CW3\fR, then the verification code will be called very frequently, which will slow down libev considerably. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_COMMON\s0" 4 .IX Item "EV_COMMON" By default, all watchers have a \f(CW\*(C`void *data\*(C'\fR member. By redefining this macro to something else you can include more and other types of members. You have to define it each time you include one of the files, though, and it must be identical each time. .Sp For example, the perl \s-1EV\s0 module uses something like this: .Sp .Vb 3 \& #define EV_COMMON \e \& SV *self; /* contains this struct */ \e \& SV *cb_sv, *fh /* note no trailing ";" */ .Ve .IP "\s-1EV_CB_DECLARE \s0(type)" 4 .IX Item "EV_CB_DECLARE (type)" .PD 0 .IP "\s-1EV_CB_INVOKE \s0(watcher, revents)" 4 .IX Item "EV_CB_INVOKE (watcher, revents)" .IP "ev_set_cb (ev, cb)" 4 .IX Item "ev_set_cb (ev, cb)" .PD Can be used to change the callback member declaration in each watcher, and the way callbacks are invoked and set. Must expand to a struct member definition and a statement, respectively. See the \fIev.h\fR header file for their default definitions. One possible use for overriding these is to avoid the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument in all cases, or to use method calls instead of plain function calls in \*(C+. .SS "\s-1EXPORTED API SYMBOLS\s0" .IX Subsection "EXPORTED API SYMBOLS" If you need to re-export the \s-1API \s0(e.g. via a \s-1DLL\s0) and you need a list of exported symbols, you can use the provided \fISymbol.*\fR files which list all public symbols, one per line: .PP .Vb 2 \& Symbols.ev for libev proper \& Symbols.event for the libevent emulation .Ve .PP This can also be used to rename all public symbols to avoid clashes with multiple versions of libev linked together (which is obviously bad in itself, but sometimes it is inconvenient to avoid this). .PP A sed command like this will create wrapper \f(CW\*(C`#define\*(C'\fR's that you need to include before including \fIev.h\fR: .PP .Vb 1 \& wrap.h .Ve .PP This would create a file \fIwrap.h\fR which essentially looks like this: .PP .Vb 4 \& #define ev_backend myprefix_ev_backend \& #define ev_check_start myprefix_ev_check_start \& #define ev_check_stop myprefix_ev_check_stop \& ... .Ve .SS "\s-1EXAMPLES\s0" .IX Subsection "EXAMPLES" For a real-world example of a program the includes libev verbatim, you can have a look at the \s-1EV\s0 perl module (). It has the libev files in the \fIlibev/\fR subdirectory and includes them in the \fI\s-1EV/EVAPI\s0.h\fR (public interface) and \fI\s-1EV\s0.xs\fR (implementation) files. Only the \fI\s-1EV\s0.xs\fR file will be compiled. It is pretty complex because it provides its own header file. .PP The usage in rxvt-unicode is simpler. It has a \fIev_cpp.h\fR header file that everybody includes and which overrides some configure choices: .PP .Vb 8 \& #define EV_FEATURES 8 \& #define EV_USE_SELECT 1 \& #define EV_PREPARE_ENABLE 1 \& #define EV_IDLE_ENABLE 1 \& #define EV_SIGNAL_ENABLE 1 \& #define EV_CHILD_ENABLE 1 \& #define EV_USE_STDEXCEPT 0 \& #define EV_CONFIG_H \& \& #include "ev++.h" .Ve .PP And a \fIev_cpp.C\fR implementation file that contains libev proper and is compiled: .PP .Vb 2 \& #include "ev_cpp.h" \& #include "ev.c" .Ve .SH "INTERACTION WITH OTHER PROGRAMS, LIBRARIES OR THE ENVIRONMENT" .IX Header "INTERACTION WITH OTHER PROGRAMS, LIBRARIES OR THE ENVIRONMENT" .SS "\s-1THREADS AND COROUTINES\s0" .IX Subsection "THREADS AND COROUTINES" \fI\s-1THREADS\s0\fR .IX Subsection "THREADS" .PP All libev functions are reentrant and thread-safe unless explicitly documented otherwise, but libev implements no locking itself. This means that you can use as many loops as you want in parallel, as long as there are no concurrent calls into any libev function with the same loop parameter (\f(CW\*(C`ev_default_*\*(C'\fR calls have an implicit default loop parameter, of course): libev guarantees that different event loops share no data structures that need any locking. .PP Or to put it differently: calls with different loop parameters can be done concurrently from multiple threads, calls with the same loop parameter must be done serially (but can be done from different threads, as long as only one thread ever is inside a call at any point in time, e.g. by using a mutex per loop). .PP Specifically to support threads (and signal handlers), libev implements so-called \f(CW\*(C`ev_async\*(C'\fR watchers, which allow some limited form of concurrency on the same event loop, namely waking it up \*(L"from the outside\*(R". .PP If you want to know which design (one loop, locking, or multiple loops without or something else still) is best for your problem, then I cannot help you, but here is some generic advice: .IP "\(bu" 4 most applications have a main thread: use the default libev loop in that thread, or create a separate thread running only the default loop. .Sp This helps integrating other libraries or software modules that use libev themselves and don't care/know about threading. .IP "\(bu" 4 one loop per thread is usually a good model. .Sp Doing this is almost never wrong, sometimes a better-performance model exists, but it is always a good start. .IP "\(bu" 4 other models exist, such as the leader/follower pattern, where one loop is handed through multiple threads in a kind of round-robin fashion. .Sp Choosing a model is hard \- look around, learn, know that usually you can do better than you currently do :\-) .IP "\(bu" 4 often you need to talk to some other thread which blocks in the event loop. .Sp \&\f(CW\*(C`ev_async\*(C'\fR watchers can be used to wake them up from other threads safely (or from signal contexts...). .Sp An example use would be to communicate signals or other events that only work in the default loop by registering the signal watcher with the default loop and triggering an \f(CW\*(C`ev_async\*(C'\fR watcher from the default loop watcher callback into the event loop interested in the signal. .PP See also \*(L"\s-1THREAD LOCKING EXAMPLE\*(R"\s0. .PP \fI\s-1COROUTINES\s0\fR .IX Subsection "COROUTINES" .PP Libev is very accommodating to coroutines (\*(L"cooperative threads\*(R"): libev fully supports nesting calls to its functions from different coroutines (e.g. you can call \f(CW\*(C`ev_run\*(C'\fR on the same loop from two different coroutines, and switch freely between both coroutines running the loop, as long as you don't confuse yourself). The only exception is that you must not do this from \f(CW\*(C`ev_periodic\*(C'\fR reschedule callbacks. .PP Care has been taken to ensure that libev does not keep local state inside \&\f(CW\*(C`ev_run\*(C'\fR, and other calls do not usually allow for coroutine switches as they do not call any callbacks. .SS "\s-1COMPILER WARNINGS\s0" .IX Subsection "COMPILER WARNINGS" Depending on your compiler and compiler settings, you might get no or a lot of warnings when compiling libev code. Some people are apparently scared by this. .PP However, these are unavoidable for many reasons. For one, each compiler has different warnings, and each user has different tastes regarding warning options. \*(L"Warn-free\*(R" code therefore cannot be a goal except when targeting a specific compiler and compiler-version. .PP Another reason is that some compiler warnings require elaborate workarounds, or other changes to the code that make it less clear and less maintainable. .PP And of course, some compiler warnings are just plain stupid, or simply wrong (because they don't actually warn about the condition their message seems to warn about). For example, certain older gcc versions had some warnings that resulted in an extreme number of false positives. These have been fixed, but some people still insist on making code warn-free with such buggy versions. .PP While libev is written to generate as few warnings as possible, \&\*(L"warn-free\*(R" code is not a goal, and it is recommended not to build libev with any compiler warnings enabled unless you are prepared to cope with them (e.g. by ignoring them). Remember that warnings are just that: warnings, not errors, or proof of bugs. .SS "\s-1VALGRIND\s0" .IX Subsection "VALGRIND" Valgrind has a special section here because it is a popular tool that is highly useful. Unfortunately, valgrind reports are very hard to interpret. .PP If you think you found a bug (memory leak, uninitialised data access etc.) in libev, then check twice: If valgrind reports something like: .PP .Vb 3 \& ==2274== definitely lost: 0 bytes in 0 blocks. \& ==2274== possibly lost: 0 bytes in 0 blocks. \& ==2274== still reachable: 256 bytes in 1 blocks. .Ve .PP Then there is no memory leak, just as memory accounted to global variables is not a memleak \- the memory is still being referenced, and didn't leak. .PP Similarly, under some circumstances, valgrind might report kernel bugs as if it were a bug in libev (e.g. in realloc or in the poll backend, although an acceptable workaround has been found here), or it might be confused. .PP Keep in mind that valgrind is a very good tool, but only a tool. Don't make it into some kind of religion. .PP If you are unsure about something, feel free to contact the mailing list with the full valgrind report and an explanation on why you think this is a bug in libev (best check the archives, too :). However, don't be annoyed when you get a brisk \*(L"this is no bug\*(R" answer and take the chance of learning how to interpret valgrind properly. .PP If you need, for some reason, empty reports from valgrind for your project I suggest using suppression lists. .SH "PORTABILITY NOTES" .IX Header "PORTABILITY NOTES" .SS "\s-1GNU/LINUX 32 BIT LIMITATIONS\s0" .IX Subsection "GNU/LINUX 32 BIT LIMITATIONS" GNU/Linux is the only common platform that supports 64 bit file/large file interfaces but \fIdisables\fR them by default. .PP That means that libev compiled in the default environment doesn't support files larger than 2GiB or so, which mainly affects \f(CW\*(C`ev_stat\*(C'\fR watchers. .PP Unfortunately, many programs try to work around this GNU/Linux issue by enabling the large file \s-1API,\s0 which makes them incompatible with the standard libev compiled for their system. .PP Likewise, libev cannot enable the large file \s-1API\s0 itself as this would suddenly make it incompatible to the default compile time environment, i.e. all programs not using special compile switches. .SS "\s-1OS/X AND DARWIN BUGS\s0" .IX Subsection "OS/X AND DARWIN BUGS" The whole thing is a bug if you ask me \- basically any system interface you touch is broken, whether it is locales, poll, kqueue or even the OpenGL drivers. .PP \fI\f(CI\*(C`kqueue\*(C'\fI is buggy\fR .IX Subsection "kqueue is buggy" .PP The kqueue syscall is broken in all known versions \- most versions support only sockets, many support pipes. .PP Libev tries to work around this by not using \f(CW\*(C`kqueue\*(C'\fR by default on this rotten platform, but of course you can still ask for it when creating a loop \- embedding a socket-only kqueue loop into a select-based one is probably going to work well. .PP \fI\f(CI\*(C`poll\*(C'\fI is buggy\fR .IX Subsection "poll is buggy" .PP Instead of fixing \f(CW\*(C`kqueue\*(C'\fR, Apple replaced their (working) \f(CW\*(C`poll\*(C'\fR implementation by something calling \f(CW\*(C`kqueue\*(C'\fR internally around the 10.5.6 release, so now \f(CW\*(C`kqueue\*(C'\fR \fIand\fR \f(CW\*(C`poll\*(C'\fR are broken. .PP Libev tries to work around this by not using \f(CW\*(C`poll\*(C'\fR by default on this rotten platform, but of course you can still ask for it when creating a loop. .PP \fI\f(CI\*(C`select\*(C'\fI is buggy\fR .IX Subsection "select is buggy" .PP All that's left is \f(CW\*(C`select\*(C'\fR, and of course Apple found a way to fuck this one up as well: On \s-1OS/X, \s0\f(CW\*(C`select\*(C'\fR actively limits the number of file descriptors you can pass in to 1024 \- your program suddenly crashes when you use more. .PP There is an undocumented \*(L"workaround\*(R" for this \- defining \&\f(CW\*(C`_DARWIN_UNLIMITED_SELECT\*(C'\fR, which libev tries to use, so select \fIshould\fR work on \s-1OS/X.\s0 .SS "\s-1SOLARIS PROBLEMS AND WORKAROUNDS\s0" .IX Subsection "SOLARIS PROBLEMS AND WORKAROUNDS" \fI\f(CI\*(C`errno\*(C'\fI reentrancy\fR .IX Subsection "errno reentrancy" .PP The default compile environment on Solaris is unfortunately so thread-unsafe that you can't even use components/libraries compiled without \f(CW\*(C`\-D_REENTRANT\*(C'\fR in a threaded program, which, of course, isn't defined by default. A valid, if stupid, implementation choice. .PP If you want to use libev in threaded environments you have to make sure it's compiled with \f(CW\*(C`_REENTRANT\*(C'\fR defined. .PP \fIEvent port backend\fR .IX Subsection "Event port backend" .PP The scalable event interface for Solaris is called \*(L"event ports\*(R". Unfortunately, this mechanism is very buggy in all major releases. If you run into high \s-1CPU\s0 usage, your program freezes or you get a large number of spurious wakeups, make sure you have all the relevant and latest kernel patches applied. No, I don't know which ones, but there are multiple ones to apply, and afterwards, event ports actually work great. .PP If you can't get it to work, you can try running the program by setting the environment variable \f(CW\*(C`LIBEV_FLAGS=3\*(C'\fR to only allow \f(CW\*(C`poll\*(C'\fR and \&\f(CW\*(C`select\*(C'\fR backends. .SS "\s-1AIX POLL BUG\s0" .IX Subsection "AIX POLL BUG" \&\s-1AIX\s0 unfortunately has a broken \f(CW\*(C`poll.h\*(C'\fR header. Libev works around this by trying to avoid the poll backend altogether (i.e. it's not even compiled in), which normally isn't a big problem as \f(CW\*(C`select\*(C'\fR works fine with large bitsets on \s-1AIX,\s0 and \s-1AIX\s0 is dead anyway. .SS "\s-1WIN32 PLATFORM LIMITATIONS AND WORKAROUNDS\s0" .IX Subsection "WIN32 PLATFORM LIMITATIONS AND WORKAROUNDS" \fIGeneral issues\fR .IX Subsection "General issues" .PP Win32 doesn't support any of the standards (e.g. \s-1POSIX\s0) that libev requires, and its I/O model is fundamentally incompatible with the \s-1POSIX\s0 model. Libev still offers limited functionality on this platform in the form of the \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR backend, and only supports socket descriptors. This only applies when using Win32 natively, not when using e.g. cygwin. Actually, it only applies to the microsofts own compilers, as every compiler comes with a slightly differently broken/incompatible environment. .PP Lifting these limitations would basically require the full re-implementation of the I/O system. If you are into this kind of thing, then note that glib does exactly that for you in a very portable way (note also that glib is the slowest event library known to man). .PP There is no supported compilation method available on windows except embedding it into other applications. .PP Sensible signal handling is officially unsupported by Microsoft \- libev tries its best, but under most conditions, signals will simply not work. .PP Not a libev limitation but worth mentioning: windows apparently doesn't accept large writes: instead of resulting in a partial write, windows will either accept everything or return \f(CW\*(C`ENOBUFS\*(C'\fR if the buffer is too large, so make sure you only write small amounts into your sockets (less than a megabyte seems safe, but this apparently depends on the amount of memory available). .PP Due to the many, low, and arbitrary limits on the win32 platform and the abysmal performance of winsockets, using a large number of sockets is not recommended (and not reasonable). If your program needs to use more than a hundred or so sockets, then likely it needs to use a totally different implementation for windows, as libev offers the \s-1POSIX\s0 readiness notification model, which cannot be implemented efficiently on windows (due to Microsoft monopoly games). .PP A typical way to use libev under windows is to embed it (see the embedding section for details) and use the following \fIevwrap.h\fR header file instead of \fIev.h\fR: .PP .Vb 2 \& #define EV_STANDALONE /* keeps ev from requiring config.h */ \& #define EV_SELECT_IS_WINSOCKET 1 /* configure libev for windows select */ \& \& #include "ev.h" .Ve .PP And compile the following \fIevwrap.c\fR file into your project (make sure you do \fInot\fR compile the \fIev.c\fR or any other embedded source files!): .PP .Vb 2 \& #include "evwrap.h" \& #include "ev.c" .Ve .PP \fIThe winsocket \f(CI\*(C`select\*(C'\fI function\fR .IX Subsection "The winsocket select function" .PP The winsocket \f(CW\*(C`select\*(C'\fR function doesn't follow \s-1POSIX\s0 in that it requires socket \fIhandles\fR and not socket \fIfile descriptors\fR (it is also extremely buggy). This makes select very inefficient, and also requires a mapping from file descriptors to socket handles (the Microsoft C runtime provides the function \f(CW\*(C`_open_osfhandle\*(C'\fR for this). See the discussion of the \f(CW\*(C`EV_SELECT_USE_FD_SET\*(C'\fR, \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR and \&\f(CW\*(C`EV_FD_TO_WIN32_HANDLE\*(C'\fR preprocessor symbols for more info. .PP The configuration for a \*(L"naked\*(R" win32 using the Microsoft runtime libraries and raw winsocket select is: .PP .Vb 2 \& #define EV_USE_SELECT 1 \& #define EV_SELECT_IS_WINSOCKET 1 /* forces EV_SELECT_USE_FD_SET, too */ .Ve .PP Note that winsockets handling of fd sets is O(n), so you can easily get a complexity in the O(nX) range when using win32. .PP \fILimited number of file descriptors\fR .IX Subsection "Limited number of file descriptors" .PP Windows has numerous arbitrary (and low) limits on things. .PP Early versions of winsocket's select only supported waiting for a maximum of \f(CW64\fR handles (probably owning to the fact that all windows kernels can only wait for \f(CW64\fR things at the same time internally; Microsoft recommends spawning a chain of threads and wait for 63 handles and the previous thread in each. Sounds great!). .PP Newer versions support more handles, but you need to define \f(CW\*(C`FD_SETSIZE\*(C'\fR to some high number (e.g. \f(CW2048\fR) before compiling the winsocket select call (which might be in libev or elsewhere, for example, perl and many other interpreters do their own select emulation on windows). .PP Another limit is the number of file descriptors in the Microsoft runtime libraries, which by default is \f(CW64\fR (there must be a hidden \fI64\fR fetish or something like this inside Microsoft). You can increase this by calling \f(CW\*(C`_setmaxstdio\*(C'\fR, which can increase this limit to \f(CW2048\fR (another arbitrary limit), but is broken in many versions of the Microsoft runtime libraries. This might get you to about \f(CW512\fR or \f(CW2048\fR sockets (depending on windows version and/or the phase of the moon). To get more, you need to wrap all I/O functions and provide your own fd management, but the cost of calling select (O(nX)) will likely make this unworkable. .SS "\s-1PORTABILITY REQUIREMENTS\s0" .IX Subsection "PORTABILITY REQUIREMENTS" In addition to a working ISO-C implementation and of course the backend-specific APIs, libev relies on a few additional extensions: .ie n .IP """void (*)(ev_watcher_type *, int revents)"" must have compatible calling conventions regardless of ""ev_watcher_type *""." 4 .el .IP "\f(CWvoid (*)(ev_watcher_type *, int revents)\fR must have compatible calling conventions regardless of \f(CWev_watcher_type *\fR." 4 .IX Item "void (*)(ev_watcher_type *, int revents) must have compatible calling conventions regardless of ev_watcher_type *." Libev assumes not only that all watcher pointers have the same internal structure (guaranteed by \s-1POSIX\s0 but not by \s-1ISO C\s0 for example), but it also assumes that the same (machine) code can be used to call any watcher callback: The watcher callbacks have different type signatures, but libev calls them using an \f(CW\*(C`ev_watcher *\*(C'\fR internally. .IP "pointer accesses must be thread-atomic" 4 .IX Item "pointer accesses must be thread-atomic" Accessing a pointer value must be atomic, it must both be readable and writable in one piece \- this is the case on all current architectures. .ie n .IP """sig_atomic_t volatile"" must be thread-atomic as well" 4 .el .IP "\f(CWsig_atomic_t volatile\fR must be thread-atomic as well" 4 .IX Item "sig_atomic_t volatile must be thread-atomic as well" The type \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (or whatever is defined as \&\f(CW\*(C`EV_ATOMIC_T\*(C'\fR) must be atomic with respect to accesses from different threads. This is not part of the specification for \f(CW\*(C`sig_atomic_t\*(C'\fR, but is believed to be sufficiently portable. .ie n .IP """sigprocmask"" must work in a threaded environment" 4 .el .IP "\f(CWsigprocmask\fR must work in a threaded environment" 4 .IX Item "sigprocmask must work in a threaded environment" Libev uses \f(CW\*(C`sigprocmask\*(C'\fR to temporarily block signals. This is not allowed in a threaded program (\f(CW\*(C`pthread_sigmask\*(C'\fR has to be used). Typical pthread implementations will either allow \f(CW\*(C`sigprocmask\*(C'\fR in the \*(L"main thread\*(R" or will block signals process-wide, both behaviours would be compatible with libev. Interaction between \f(CW\*(C`sigprocmask\*(C'\fR and \&\f(CW\*(C`pthread_sigmask\*(C'\fR could complicate things, however. .Sp The most portable way to handle signals is to block signals in all threads except the initial one, and run the signal handling loop in the initial thread as well. .ie n .IP """long"" must be large enough for common memory allocation sizes" 4 .el .IP "\f(CWlong\fR must be large enough for common memory allocation sizes" 4 .IX Item "long must be large enough for common memory allocation sizes" To improve portability and simplify its \s-1API,\s0 libev uses \f(CW\*(C`long\*(C'\fR internally instead of \f(CW\*(C`size_t\*(C'\fR when allocating its data structures. On non-POSIX systems (Microsoft...) this might be unexpectedly low, but is still at least 31 bits everywhere, which is enough for hundreds of millions of watchers. .ie n .IP """double"" must hold a time value in seconds with enough accuracy" 4 .el .IP "\f(CWdouble\fR must hold a time value in seconds with enough accuracy" 4 .IX Item "double must hold a time value in seconds with enough accuracy" The type \f(CW\*(C`double\*(C'\fR is used to represent timestamps. It is required to have at least 51 bits of mantissa (and 9 bits of exponent), which is good enough for at least into the year 4000 with millisecond accuracy (the design goal for libev). This requirement is overfulfilled by implementations using \s-1IEEE 754,\s0 which is basically all existing ones. .Sp With \s-1IEEE 754\s0 doubles, you get microsecond accuracy until at least the year 2255 (and millisecond accuracy till the year 287396 \- by then, libev is either obsolete or somebody patched it to use \f(CW\*(C`long double\*(C'\fR or something like that, just kidding). .PP If you know of other additional requirements drop me a note. .SH "ALGORITHMIC COMPLEXITIES" .IX Header "ALGORITHMIC COMPLEXITIES" In this section the complexities of (many of) the algorithms used inside libev will be documented. For complexity discussions about backends see the documentation for \f(CW\*(C`ev_default_init\*(C'\fR. .PP All of the following are about amortised time: If an array needs to be extended, libev needs to realloc and move the whole array, but this happens asymptotically rarer with higher number of elements, so O(1) might mean that libev does a lengthy realloc operation in rare cases, but on average it is much faster and asymptotically approaches constant time. .IP "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" 4 .IX Item "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" This means that, when you have a watcher that triggers in one hour and there are 100 watchers that would trigger before that, then inserting will have to skip roughly seven (\f(CW\*(C`ld 100\*(C'\fR) of these watchers. .IP "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" 4 .IX Item "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" That means that changing a timer costs less than removing/adding them, as only the relative motion in the event queue has to be paid for. .IP "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" 4 .IX Item "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" These just add the watcher into an array or at the head of a list. .IP "Stopping check/prepare/idle/fork/async watchers: O(1)" 4 .IX Item "Stopping check/prepare/idle/fork/async watchers: O(1)" .PD 0 .IP "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % \s-1EV_PID_HASHSIZE\s0))" 4 .IX Item "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % EV_PID_HASHSIZE))" .PD These watchers are stored in lists, so they need to be walked to find the correct watcher to remove. The lists are usually short (you don't usually have many watchers waiting for the same fd or signal: one is typical, two is rare). .IP "Finding the next timer in each loop iteration: O(1)" 4 .IX Item "Finding the next timer in each loop iteration: O(1)" By virtue of using a binary or 4\-heap, the next timer is always found at a fixed position in the storage array. .IP "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" 4 .IX Item "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" A change means an I/O watcher gets started or stopped, which requires libev to recalculate its status (and possibly tell the kernel, depending on backend and whether \f(CW\*(C`ev_io_set\*(C'\fR was used). .IP "Activating one watcher (putting it into the pending state): O(1)" 4 .IX Item "Activating one watcher (putting it into the pending state): O(1)" .PD 0 .IP "Priority handling: O(number_of_priorities)" 4 .IX Item "Priority handling: O(number_of_priorities)" .PD Priorities are implemented by allocating some space for each priority. When doing priority-based operations, libev usually has to linearly search all the priorities, but starting/stopping and activating watchers becomes O(1) with respect to priority handling. .IP "Sending an ev_async: O(1)" 4 .IX Item "Sending an ev_async: O(1)" .PD 0 .IP "Processing ev_async_send: O(number_of_async_watchers)" 4 .IX Item "Processing ev_async_send: O(number_of_async_watchers)" .IP "Processing signals: O(max_signal_number)" 4 .IX Item "Processing signals: O(max_signal_number)" .PD Sending involves a system call \fIiff\fR there were no other \f(CW\*(C`ev_async_send\*(C'\fR calls in the current loop iteration and the loop is currently blocked. Checking for async and signal events involves iterating over all running async watchers or all signal numbers. .SH "PORTING FROM LIBEV 3.X TO 4.X" .IX Header "PORTING FROM LIBEV 3.X TO 4.X" The major version 4 introduced some incompatible changes to the \s-1API.\s0 .PP At the moment, the \f(CW\*(C`ev.h\*(C'\fR header file provides compatibility definitions for all changes, so most programs should still compile. The compatibility layer might be removed in later versions of libev, so better update to the new \s-1API\s0 early than late. .ie n .IP """EV_COMPAT3"" backwards compatibility mechanism" 4 .el .IP "\f(CWEV_COMPAT3\fR backwards compatibility mechanism" 4 .IX Item "EV_COMPAT3 backwards compatibility mechanism" The backward compatibility mechanism can be controlled by \&\f(CW\*(C`EV_COMPAT3\*(C'\fR. See \*(L"\s-1PREPROCESSOR SYMBOLS/MACROS\*(R"\s0 in the \*(L"\s-1EMBEDDING\*(R"\s0 section. .ie n .IP """ev_default_destroy"" and ""ev_default_fork"" have been removed" 4 .el .IP "\f(CWev_default_destroy\fR and \f(CWev_default_fork\fR have been removed" 4 .IX Item "ev_default_destroy and ev_default_fork have been removed" These calls can be replaced easily by their \f(CW\*(C`ev_loop_xxx\*(C'\fR counterparts: .Sp .Vb 2 \& ev_loop_destroy (EV_DEFAULT_UC); \& ev_loop_fork (EV_DEFAULT); .Ve .IP "function/symbol renames" 4 .IX Item "function/symbol renames" A number of functions and symbols have been renamed: .Sp .Vb 3 \& ev_loop => ev_run \& EVLOOP_NONBLOCK => EVRUN_NOWAIT \& EVLOOP_ONESHOT => EVRUN_ONCE \& \& ev_unloop => ev_break \& EVUNLOOP_CANCEL => EVBREAK_CANCEL \& EVUNLOOP_ONE => EVBREAK_ONE \& EVUNLOOP_ALL => EVBREAK_ALL \& \& EV_TIMEOUT => EV_TIMER \& \& ev_loop_count => ev_iteration \& ev_loop_depth => ev_depth \& ev_loop_verify => ev_verify .Ve .Sp Most functions working on \f(CW\*(C`struct ev_loop\*(C'\fR objects don't have an \&\f(CW\*(C`ev_loop_\*(C'\fR prefix, so it was removed; \f(CW\*(C`ev_loop\*(C'\fR, \f(CW\*(C`ev_unloop\*(C'\fR and associated constants have been renamed to not collide with the \f(CW\*(C`struct ev_loop\*(C'\fR anymore and \f(CW\*(C`EV_TIMER\*(C'\fR now follows the same naming scheme as all other watcher types. Note that \f(CW\*(C`ev_loop_fork\*(C'\fR is still called \&\f(CW\*(C`ev_loop_fork\*(C'\fR because it would otherwise clash with the \f(CW\*(C`ev_fork\*(C'\fR typedef. .ie n .IP """EV_MINIMAL"" mechanism replaced by ""EV_FEATURES""" 4 .el .IP "\f(CWEV_MINIMAL\fR mechanism replaced by \f(CWEV_FEATURES\fR" 4 .IX Item "EV_MINIMAL mechanism replaced by EV_FEATURES" The preprocessor symbol \f(CW\*(C`EV_MINIMAL\*(C'\fR has been replaced by a different mechanism, \f(CW\*(C`EV_FEATURES\*(C'\fR. Programs using \f(CW\*(C`EV_MINIMAL\*(C'\fR usually compile and work, but the library code will of course be larger. .SH "GLOSSARY" .IX Header "GLOSSARY" .IP "active" 4 .IX Item "active" A watcher is active as long as it has been started and not yet stopped. See \*(L"\s-1WATCHER STATES\*(R"\s0 for details. .IP "application" 4 .IX Item "application" In this document, an application is whatever is using libev. .IP "backend" 4 .IX Item "backend" The part of the code dealing with the operating system interfaces. .IP "callback" 4 .IX Item "callback" The address of a function that is called when some event has been detected. Callbacks are being passed the event loop, the watcher that received the event, and the actual event bitset. .IP "callback/watcher invocation" 4 .IX Item "callback/watcher invocation" The act of calling the callback associated with a watcher. .IP "event" 4 .IX Item "event" A change of state of some external event, such as data now being available for reading on a file descriptor, time having passed or simply not having any other events happening anymore. .Sp In libev, events are represented as single bits (such as \f(CW\*(C`EV_READ\*(C'\fR or \&\f(CW\*(C`EV_TIMER\*(C'\fR). .IP "event library" 4 .IX Item "event library" A software package implementing an event model and loop. .IP "event loop" 4 .IX Item "event loop" An entity that handles and processes external events and converts them into callback invocations. .IP "event model" 4 .IX Item "event model" The model used to describe how an event loop handles and processes watchers and events. .IP "pending" 4 .IX Item "pending" A watcher is pending as soon as the corresponding event has been detected. See \*(L"\s-1WATCHER STATES\*(R"\s0 for details. .IP "real time" 4 .IX Item "real time" The physical time that is observed. It is apparently strictly monotonic :) .IP "wall-clock time" 4 .IX Item "wall-clock time" The time and date as shown on clocks. Unlike real time, it can actually be wrong and jump forwards and backwards, e.g. when you adjust your clock. .IP "watcher" 4 .IX Item "watcher" A data structure that describes interest in certain events. Watchers need to be started (attached to an event loop) before they can receive events. .SH "AUTHOR" .IX Header "AUTHOR" Marc Lehmann , with repeated corrections by Mikael Magnusson and Emanuele Giaquinta, and minor corrections by many others. tarantool_1.6.7.588.g76bbd9c/third_party/libev/CVS/0000775000000000000000000000000012634006617020235 5ustar rootroottarantool_1.6.7.588.g76bbd9c/third_party/libev/CVS/Entries0000664000000000000000000000242412634006617021573 0ustar rootroot/Makefile.am/1.9/Mon Aug 17 17:43:15 2015// /README/1.21/Mon Aug 17 17:43:15 2015// /README.embed/1.29/Mon Aug 17 17:43:15 2015// /Symbols.ev/1.14/Mon Aug 17 17:43:15 2015// /Symbols.event/1.4/Mon Aug 17 17:43:15 2015// /autogen.sh/1.3/Mon Aug 17 17:43:15 2015// /ev_poll.c/1.39/Mon Aug 17 17:43:15 2015// /ev_port.c/1.28/Mon Aug 17 17:43:15 2015// /ev_select.c/1.55/Mon Aug 17 17:43:15 2015// /event.c/1.52/Mon Aug 17 17:43:15 2015// /event.h/1.26/Mon Aug 17 17:43:15 2015// /event_compat.h/1.8/Mon Aug 17 17:43:15 2015// /import_libevent/1.29/Mon Aug 17 17:43:15 2015// /update_ev_c/1.2/Mon Aug 17 17:43:15 2015// /update_ev_wrap/1.6/Mon Aug 17 17:43:15 2015// /update_symbols/1.1/Mon Aug 17 17:43:15 2015// /Changes/1.307/Sun Oct 4 10:12:28 2015// /LICENSE/1.11/Sun Oct 4 10:12:28 2015// /configure.ac/1.40/Sun Oct 4 10:12:28 2015// /ev++.h/1.62/Sun Oct 4 10:12:28 2015// /ev.3/1.103/Sun Oct 4 10:12:28 2015// /ev.c/1.477/Sun Oct 4 10:12:28 2015// /ev.h/1.183/Sun Oct 4 10:12:28 2015// /ev.pod/1.435/Sun Oct 4 10:12:28 2015// /ev_epoll.c/1.68/Sun Oct 4 10:12:28 2015// /ev_kqueue.c/1.55/Sun Oct 4 10:12:28 2015// /ev_vars.h/1.58/Sun Oct 4 10:12:28 2015// /ev_win32.c/1.16/Sun Oct 4 10:12:28 2015// /ev_wrap.h/1.38/Sun Oct 4 10:12:28 2015// /libev.m4/1.16/Sun Oct 4 10:12:28 2015// D tarantool_1.6.7.588.g76bbd9c/third_party/libev/CVS/Repository0000664000000000000000000000000612634006617022333 0ustar rootrootlibev tarantool_1.6.7.588.g76bbd9c/third_party/libev/CVS/Root0000664000000000000000000000005712634006617021105 0ustar rootroot:pserver:anonymous@cvs.schmorp.de/schmorpforge tarantool_1.6.7.588.g76bbd9c/third_party/libev/libev.m40000664000000000000000000000304012634006617021142 0ustar rootrootdnl this file is part of libev, do not make local modifications dnl http://software.schmorp.de/pkg/libev dnl libev support AC_CHECK_HEADERS(sys/inotify.h sys/epoll.h sys/event.h port.h poll.h sys/select.h sys/eventfd.h sys/signalfd.h) AC_CHECK_FUNCS(inotify_init epoll_ctl kqueue port_create poll select eventfd signalfd) AC_CHECK_FUNCS(clock_gettime, [], [ dnl on linux, try syscall wrapper first if test $(uname) = Linux; then AC_MSG_CHECKING(for clock_gettime syscall) AC_LINK_IFELSE([AC_LANG_PROGRAM( [#include #include #include ], [struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])], [ac_have_clock_syscall=1 AC_DEFINE(HAVE_CLOCK_SYSCALL, 1, Define to 1 to use the syscall interface for clock_gettime) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) fi if test -z "$LIBEV_M4_AVOID_LIBRT" && test -z "$ac_have_clock_syscall"; then AC_CHECK_LIB(rt, clock_gettime) unset ac_cv_func_clock_gettime AC_CHECK_FUNCS(clock_gettime) fi ]) AC_CHECK_FUNCS(nanosleep, [], [ if test -z "$LIBEV_M4_AVOID_LIBRT"; then AC_CHECK_LIB(rt, nanosleep) unset ac_cv_func_nanosleep AC_CHECK_FUNCS(nanosleep) fi ]) if test -z "$LIBEV_M4_AVOID_LIBM"; then LIBM=m fi AC_SEARCH_LIBS(floor, $LIBM, [AC_DEFINE(HAVE_FLOOR, 1, Define to 1 if the floor function is available)]) tarantool_1.6.7.588.g76bbd9c/third_party/libev/ev++.h0000664000000000000000000004773712634006617020535 0ustar rootroot/* * libev simple C++ wrapper classes * * Copyright (c) 2007,2008,2010 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef EVPP_H__ #define EVPP_H__ #ifdef EV_H # include EV_H #else # include "ev.h" #endif #ifndef EV_USE_STDEXCEPT # define EV_USE_STDEXCEPT 1 #endif #if EV_USE_STDEXCEPT # include #endif namespace ev { typedef ev_tstamp tstamp; enum { UNDEF = EV_UNDEF, NONE = EV_NONE, READ = EV_READ, WRITE = EV_WRITE, #if EV_COMPAT3 TIMEOUT = EV_TIMEOUT, #endif TIMER = EV_TIMER, PERIODIC = EV_PERIODIC, SIGNAL = EV_SIGNAL, CHILD = EV_CHILD, STAT = EV_STAT, IDLE = EV_IDLE, CHECK = EV_CHECK, PREPARE = EV_PREPARE, FORK = EV_FORK, ASYNC = EV_ASYNC, EMBED = EV_EMBED, # undef ERROR // some systems stupidly #define ERROR ERROR = EV_ERROR }; enum { AUTO = EVFLAG_AUTO, NOENV = EVFLAG_NOENV, FORKCHECK = EVFLAG_FORKCHECK, SELECT = EVBACKEND_SELECT, POLL = EVBACKEND_POLL, EPOLL = EVBACKEND_EPOLL, KQUEUE = EVBACKEND_KQUEUE, DEVPOLL = EVBACKEND_DEVPOLL, PORT = EVBACKEND_PORT }; enum { #if EV_COMPAT3 NONBLOCK = EVLOOP_NONBLOCK, ONESHOT = EVLOOP_ONESHOT, #endif NOWAIT = EVRUN_NOWAIT, ONCE = EVRUN_ONCE }; enum how_t { ONE = EVBREAK_ONE, ALL = EVBREAK_ALL }; struct bad_loop #if EV_USE_STDEXCEPT : std::runtime_error #endif { #if EV_USE_STDEXCEPT bad_loop () : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?") { } #endif }; #ifdef EV_AX # undef EV_AX #endif #ifdef EV_AX_ # undef EV_AX_ #endif #if EV_MULTIPLICITY # define EV_AX raw_loop # define EV_AX_ raw_loop, #else # define EV_AX # define EV_AX_ #endif struct loop_ref { loop_ref (EV_P) throw () #if EV_MULTIPLICITY : EV_AX (EV_A) #endif { } bool operator == (const loop_ref &other) const throw () { #if EV_MULTIPLICITY return EV_AX == other.EV_AX; #else return true; #endif } bool operator != (const loop_ref &other) const throw () { #if EV_MULTIPLICITY return ! (*this == other); #else return false; #endif } #if EV_MULTIPLICITY bool operator == (const EV_P) const throw () { return this->EV_AX == EV_A; } bool operator != (const EV_P) const throw () { return (*this == EV_A); } operator struct ev_loop * () const throw () { return EV_AX; } operator const struct ev_loop * () const throw () { return EV_AX; } bool is_default () const throw () { return EV_AX == ev_default_loop (0); } #endif #if EV_COMPAT3 void loop (int flags = 0) { ev_run (EV_AX_ flags); } void unloop (how_t how = ONE) throw () { ev_break (EV_AX_ how); } #endif void run (int flags = 0) { ev_run (EV_AX_ flags); } void break_loop (how_t how = ONE) throw () { ev_break (EV_AX_ how); } void post_fork () throw () { ev_loop_fork (EV_AX); } unsigned int backend () const throw () { return ev_backend (EV_AX); } tstamp now () const throw () { return ev_now (EV_AX); } void ref () throw () { ev_ref (EV_AX); } void unref () throw () { ev_unref (EV_AX); } #if EV_FEATURE_API unsigned int iteration () const throw () { return ev_iteration (EV_AX); } unsigned int depth () const throw () { return ev_depth (EV_AX); } void set_io_collect_interval (tstamp interval) throw () { ev_set_io_collect_interval (EV_AX_ interval); } void set_timeout_collect_interval (tstamp interval) throw () { ev_set_timeout_collect_interval (EV_AX_ interval); } #endif // function callback void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) throw () { ev_once (EV_AX_ fd, events, timeout, cb, arg); } // method callback template void once (int fd, int events, tstamp timeout, K *object) throw () { once (fd, events, timeout, method_thunk, object); } // default method == operator () template void once (int fd, int events, tstamp timeout, K *object) throw () { once (fd, events, timeout, method_thunk, object); } template static void method_thunk (int revents, void *arg) { (static_cast(arg)->*method) (revents); } // no-argument method callback template void once (int fd, int events, tstamp timeout, K *object) throw () { once (fd, events, timeout, method_noargs_thunk, object); } template static void method_noargs_thunk (int revents, void *arg) { (static_cast(arg)->*method) (); } // simpler function callback template void once (int fd, int events, tstamp timeout) throw () { once (fd, events, timeout, simpler_func_thunk); } template static void simpler_func_thunk (int revents, void *arg) { (*cb) (revents); } // simplest function callback template void once (int fd, int events, tstamp timeout) throw () { once (fd, events, timeout, simplest_func_thunk); } template static void simplest_func_thunk (int revents, void *arg) { (*cb) (); } void feed_fd_event (int fd, int revents) throw () { ev_feed_fd_event (EV_AX_ fd, revents); } void feed_signal_event (int signum) throw () { ev_feed_signal_event (EV_AX_ signum); } #if EV_MULTIPLICITY struct ev_loop* EV_AX; #endif }; #if EV_MULTIPLICITY struct dynamic_loop : loop_ref { dynamic_loop (unsigned int flags = AUTO) throw (bad_loop) : loop_ref (ev_loop_new (flags)) { if (!EV_AX) throw bad_loop (); } ~dynamic_loop () throw () { ev_loop_destroy (EV_AX); EV_AX = 0; } private: dynamic_loop (const dynamic_loop &); dynamic_loop & operator= (const dynamic_loop &); }; #endif struct default_loop : loop_ref { default_loop (unsigned int flags = AUTO) throw (bad_loop) #if EV_MULTIPLICITY : loop_ref (ev_default_loop (flags)) #endif { if ( #if EV_MULTIPLICITY !EV_AX #else !ev_default_loop (flags) #endif ) throw bad_loop (); } private: default_loop (const default_loop &); default_loop &operator = (const default_loop &); }; inline loop_ref get_default_loop () throw () { #if EV_MULTIPLICITY return ev_default_loop (0); #else return loop_ref (); #endif } #undef EV_AX #undef EV_AX_ #undef EV_PX #undef EV_PX_ #if EV_MULTIPLICITY # define EV_PX loop_ref EV_A # define EV_PX_ loop_ref EV_A_ #else # define EV_PX # define EV_PX_ #endif template struct base : ev_watcher { #if EV_MULTIPLICITY EV_PX; // loop set void set (EV_P) throw () { this->EV_A = EV_A; } #endif base (EV_PX) throw () #if EV_MULTIPLICITY : EV_A (EV_A) #endif { ev_init (this, 0); } void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw () { this->data = (void *)data; ev_set_cb (static_cast(this), cb); } // function callback template void set (void *data = 0) throw () { set_ (data, function_thunk); } template static void function_thunk (EV_P_ ev_watcher *w, int revents) { function (*static_cast(w), revents); } // method callback template void set (K *object) throw () { set_ (object, method_thunk); } // default method == operator () template void set (K *object) throw () { set_ (object, method_thunk); } template static void method_thunk (EV_P_ ev_watcher *w, int revents) { (static_cast(w->data)->*method) (*static_cast(w), revents); } // no-argument callback template void set (K *object) throw () { set_ (object, method_noargs_thunk); } template static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) { (static_cast(w->data)->*method) (); } void operator ()(int events = EV_UNDEF) { return ev_cb (static_cast(this)) (static_cast(this), events); } bool is_active () const throw () { return ev_is_active (static_cast(this)); } bool is_pending () const throw () { return ev_is_pending (static_cast(this)); } void feed_event (int revents) throw () { ev_feed_event (EV_A_ static_cast(this), revents); } }; inline tstamp now (EV_P) throw () { return ev_now (EV_A); } inline void delay (tstamp interval) throw () { ev_sleep (interval); } inline int version_major () throw () { return ev_version_major (); } inline int version_minor () throw () { return ev_version_minor (); } inline unsigned int supported_backends () throw () { return ev_supported_backends (); } inline unsigned int recommended_backends () throw () { return ev_recommended_backends (); } inline unsigned int embeddable_backends () throw () { return ev_embeddable_backends (); } inline void set_allocator (void *(*cb)(void *ptr, long size) throw ()) throw () { ev_set_allocator (cb); } inline void set_syserr_cb (void (*cb)(const char *msg) throw ()) throw () { ev_set_syserr_cb (cb); } #if EV_MULTIPLICITY #define EV_CONSTRUCT(cppstem,cstem) \ (EV_PX = get_default_loop ()) throw () \ : base (EV_A) \ { \ } #else #define EV_CONSTRUCT(cppstem,cstem) \ () throw () \ { \ } #endif /* using a template here would require quite a few more lines, * so a macro solution was chosen */ #define EV_BEGIN_WATCHER(cppstem,cstem) \ \ struct cppstem : base \ { \ void start () throw () \ { \ ev_ ## cstem ## _start (EV_A_ static_cast(this)); \ } \ \ void stop () throw () \ { \ ev_ ## cstem ## _stop (EV_A_ static_cast(this)); \ } \ \ cppstem EV_CONSTRUCT(cppstem,cstem) \ \ ~cppstem () throw () \ { \ stop (); \ } \ \ using base::set; \ \ private: \ \ cppstem (const cppstem &o); \ \ cppstem &operator =(const cppstem &o); \ \ public: #define EV_END_WATCHER(cppstem,cstem) \ }; EV_BEGIN_WATCHER (io, io) void set (int fd, int events) throw () { int active = is_active (); if (active) stop (); ev_io_set (static_cast(this), fd, events); if (active) start (); } void set (int events) throw () { int active = is_active (); if (active) stop (); ev_io_set (static_cast(this), fd, events); if (active) start (); } void start (int fd, int events) throw () { set (fd, events); start (); } EV_END_WATCHER (io, io) EV_BEGIN_WATCHER (timer, timer) void set (ev_tstamp after, ev_tstamp repeat = 0.) throw () { int active = is_active (); if (active) stop (); ev_timer_set (static_cast(this), after, repeat); if (active) start (); } void start (ev_tstamp after, ev_tstamp repeat = 0.) throw () { set (after, repeat); start (); } void again () throw () { ev_timer_again (EV_A_ static_cast(this)); } ev_tstamp remaining () { return ev_timer_remaining (EV_A_ static_cast(this)); } EV_END_WATCHER (timer, timer) #if EV_PERIODIC_ENABLE EV_BEGIN_WATCHER (periodic, periodic) void set (ev_tstamp at, ev_tstamp interval = 0.) throw () { int active = is_active (); if (active) stop (); ev_periodic_set (static_cast(this), at, interval, 0); if (active) start (); } void start (ev_tstamp at, ev_tstamp interval = 0.) throw () { set (at, interval); start (); } void again () throw () { ev_periodic_again (EV_A_ static_cast(this)); } EV_END_WATCHER (periodic, periodic) #endif #if EV_SIGNAL_ENABLE EV_BEGIN_WATCHER (sig, signal) void set (int signum) throw () { int active = is_active (); if (active) stop (); ev_signal_set (static_cast(this), signum); if (active) start (); } void start (int signum) throw () { set (signum); start (); } EV_END_WATCHER (sig, signal) #endif #if EV_CHILD_ENABLE EV_BEGIN_WATCHER (child, child) void set (int pid, int trace = 0) throw () { int active = is_active (); if (active) stop (); ev_child_set (static_cast(this), pid, trace); if (active) start (); } void start (int pid, int trace = 0) throw () { set (pid, trace); start (); } EV_END_WATCHER (child, child) #endif #if EV_STAT_ENABLE EV_BEGIN_WATCHER (stat, stat) void set (const char *path, ev_tstamp interval = 0.) throw () { int active = is_active (); if (active) stop (); ev_stat_set (static_cast(this), path, interval); if (active) start (); } void start (const char *path, ev_tstamp interval = 0.) throw () { stop (); set (path, interval); start (); } void update () throw () { ev_stat_stat (EV_A_ static_cast(this)); } EV_END_WATCHER (stat, stat) #endif #if EV_IDLE_ENABLE EV_BEGIN_WATCHER (idle, idle) void set () throw () { } EV_END_WATCHER (idle, idle) #endif #if EV_PREPARE_ENABLE EV_BEGIN_WATCHER (prepare, prepare) void set () throw () { } EV_END_WATCHER (prepare, prepare) #endif #if EV_CHECK_ENABLE EV_BEGIN_WATCHER (check, check) void set () throw () { } EV_END_WATCHER (check, check) #endif #if EV_EMBED_ENABLE EV_BEGIN_WATCHER (embed, embed) void set_embed (struct ev_loop *embedded_loop) throw () { int active = is_active (); if (active) stop (); ev_embed_set (static_cast(this), embedded_loop); if (active) start (); } void start (struct ev_loop *embedded_loop) throw () { set (embedded_loop); start (); } void sweep () { ev_embed_sweep (EV_A_ static_cast(this)); } EV_END_WATCHER (embed, embed) #endif #if EV_FORK_ENABLE EV_BEGIN_WATCHER (fork, fork) void set () throw () { } EV_END_WATCHER (fork, fork) #endif #if EV_ASYNC_ENABLE EV_BEGIN_WATCHER (async, async) void send () throw () { ev_async_send (EV_A_ static_cast(this)); } bool async_pending () throw () { return ev_async_pending (static_cast(this)); } EV_END_WATCHER (async, async) #endif #undef EV_PX #undef EV_PX_ #undef EV_CONSTRUCT #undef EV_BEGIN_WATCHER #undef EV_END_WATCHER } #endif tarantool_1.6.7.588.g76bbd9c/third_party/libev/configure.ac0000664000000000000000000000062612634006617022074 0ustar rootrootAC_INIT orig_CFLAGS="$CFLAGS" AC_CONFIG_SRCDIR([ev_epoll.c]) dnl also update ev.h! AM_INIT_AUTOMAKE(libev,4.20) AC_CONFIG_HEADERS([config.h]) AM_MAINTAINER_MODE AC_PROG_CC dnl Supply default CFLAGS, if not specified if test -z "$orig_CFLAGS"; then if test x$GCC = xyes; then CFLAGS="-g -O3" fi fi AC_PROG_INSTALL AC_PROG_LIBTOOL m4_include([libev.m4]) AC_CONFIG_FILES([Makefile]) AC_OUTPUT tarantool_1.6.7.588.g76bbd9c/third_party/libev/ev.pod0000664000000000000000000065122112634006617020727 0ustar rootroot=encoding utf-8 =head1 NAME libev - a high performance full-featured event loop written in C =head1 SYNOPSIS #include =head2 EXAMPLE PROGRAM // a single header file is required #include #include // for puts // every watcher type has its own typedef'd struct // with the name ev_TYPE ev_io stdin_watcher; ev_timer timeout_watcher; // all watcher callbacks have a similar signature // this callback is called when data is readable on stdin static void stdin_cb (EV_P_ ev_io *w, int revents) { puts ("stdin ready"); // for one-shot events, one must manually stop the watcher // with its corresponding stop function. ev_io_stop (EV_A_ w); // this causes all nested ev_run's to stop iterating ev_break (EV_A_ EVBREAK_ALL); } // another callback, this time for a time-out static void timeout_cb (EV_P_ ev_timer *w, int revents) { puts ("timeout"); // this causes the innermost ev_run to stop iterating ev_break (EV_A_ EVBREAK_ONE); } int main (void) { // use the default event loop unless you have special needs struct ev_loop *loop = EV_DEFAULT; // initialise an io watcher, then start it // this one will watch for stdin to become readable ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ); ev_io_start (loop, &stdin_watcher); // initialise a timer watcher, then start it // simple non-repeating 5.5 second timeout ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); ev_timer_start (loop, &timeout_watcher); // now wait for events to arrive ev_run (loop, 0); // break was called, so exit return 0; } =head1 ABOUT THIS DOCUMENT This document documents the libev software package. The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: L. While this document tries to be as complete as possible in documenting libev, its usage and the rationale behind its design, it is not a tutorial on event-based programming, nor will it introduce event-based programming with libev. Familiarity with event based programming techniques in general is assumed throughout this document. =head1 WHAT TO READ WHEN IN A HURRY This manual tries to be very detailed, but unfortunately, this also makes it very long. If you just want to know the basics of libev, I suggest reading L, then the L above and look up the missing functions in L and the C and C sections in L. =head1 ABOUT LIBEV Libev is an event loop: you register interest in certain events (such as a file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. To do this, it must take more or less complete control over your process (or thread) by executing the I handler, and will then communicate events via a callback mechanism. You register interest in certain events by registering so-called I, which are relatively small C structures you initialise with the details of the event, and then hand it over to libev by I the watcher. =head2 FEATURES Libev supports C (files, many character devices...). Epoll is truly the train wreck among event poll mechanisms, a frankenpoll, cobbled together in a hurry, no thought to design or interaction with others. Oh, the pain, will it ever stop... While stopping, setting and starting an I/O watcher in the same iteration will result in some caching, there is still a system call per such incident (because the same I could point to a different I now), so its best to avoid that. Also, C'ed file descriptors might not work very well if you register events for both file descriptors. Best performance from this backend is achieved by not unregistering all watchers for a file descriptor until it has been closed, if possible, i.e. keep at least one watcher active per fd at all times. Stopping and starting a watcher (without re-setting it) also usually doesn't cause extra overhead. A fork can both result in spurious notifications as well as in libev having to destroy and recreate the epoll object, which can take considerable time and thus should be avoided. All this means that, in practice, C can be as fast or faster than epoll for maybe up to a hundred file descriptors, depending on the usage. So sad. While nominally embeddable in other event loops, this feature is broken in all kernel versions tested so far. This backend maps C and C in the same way as C. =item C (value 8, most BSD clones) Kqueue deserves special mention, as at the time of this writing, it was broken on all BSDs except NetBSD (usually it doesn't work reliably with anything but sockets and pipes, except on Darwin, where of course it's completely useless). Unlike epoll, however, whose brokenness is by design, these kqueue bugs can (and eventually will) be fixed without API changes to existing programs. For this reason it's not being "auto-detected" unless you explicitly specify it in the flags (i.e. using C) or libev was compiled on a known-to-be-good (-enough) system like NetBSD. You still can embed kqueue into a normal poll or select backend and use it only for sockets (after having made sure that sockets work with kqueue on the target platform). See C watchers for more info. It scales in the same way as the epoll backend, but the interface to the kernel is more efficient (which says nothing about its actual speed, of course). While stopping, setting and starting an I/O watcher does never cause an extra system call as with C, it still adds up to two event changes per incident. Support for C is very bad (you might have to leak fd's on fork, but it's more sane than epoll) and it drops fds silently in similarly hard-to-detect cases. This backend usually performs well under most conditions. While nominally embeddable in other event loops, this doesn't work everywhere, so you might need to test for this. And since it is broken almost everywhere, you should only use it when you have a lot of sockets (for which it usually works), by embedding it into another event loop (e.g. C or C (but C is of course also broken on OS X)) and, did I mention it, using it only for sockets. This backend maps C into an C kevent with C, and C into an C kevent with C. =item C (value 16, Solaris 8) This is not implemented yet (and might never be, unless you send me an implementation). According to reports, C only supports sockets and is not embeddable, which would limit the usefulness of this backend immensely. =item C (value 32, Solaris 10) This uses the Solaris 10 event port mechanism. As with everything on Solaris, it's really slow, but it still scales very well (O(active_fds)). While this backend scales well, it requires one system call per active file descriptor per loop iteration. For small and medium numbers of file descriptors a "slow" C or C backend might perform better. On the positive side, this backend actually performed fully to specification in all tests and is fully embeddable, which is a rare feat among the OS-specific backends (I vastly prefer correctness over speed hacks). On the negative side, the interface is I - so bizarre that even sun itself gets it wrong in their code examples: The event polling function sometimes returns events to the caller even though an error occurred, but with no indication whether it has done so or not (yes, it's even documented that way) - deadly for edge-triggered interfaces where you absolutely have to know whether an event occurred or not because you have to re-arm the watcher. Fortunately libev seems to be able to work around these idiocies. This backend maps C and C in the same way as C. =item C Try all backends (even potentially broken ones that wouldn't be tried with C). Since this is a mask, you can do stuff such as C. It is definitely not recommended to use this flag, use whatever C returns, or simply do not specify a backend at all. =item C Not a backend at all, but a mask to select all backend bits from a C value, in case you want to mask out any backends from a flags value (e.g. when modifying the C environment variable). =back If one or more of the backend flags are or'ed into the flags value, then only these backends will be tried (in the reverse order as listed here). If none are specified, all backends in C will be tried. Example: Try to create a event loop that uses epoll and nothing else. struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); if (!epoller) fatal ("no epoll found here, maybe it hides under your chair"); Example: Use whatever libev has to offer, but make sure that kqueue is used if available. struct ev_loop *loop = ev_loop_new (ev_recommended_backends () | EVBACKEND_KQUEUE); =item ev_loop_destroy (loop) Destroys an event loop object (frees all memory and kernel state etc.). None of the active event watchers will be stopped in the normal sense, so e.g. C might still return true. It is your responsibility to either stop all watchers cleanly yourself I calling this function, or cope with the fact afterwards (which is usually the easiest thing, you can just ignore the watchers and/or C them for example). Note that certain global state, such as signal state (and installed signal handlers), will not be freed by this function, and related watchers (such as signal and child watchers) would need to be stopped manually. This function is normally used on loop objects allocated by C, but it can also be used on the default loop returned by C, in which case it is not thread-safe. Note that it is not advisable to call this function on the default loop except in the rare occasion where you really need to free its resources. If you need dynamically allocated loops it is better to use C and C. =item ev_loop_fork (loop) This function sets a flag that causes subsequent C iterations to reinitialise the kernel state for backends that have one. Despite the name, you can call it anytime you are allowed to start or stop watchers (except inside an C callback), but it makes most sense after forking, in the child process. You I call it (or use C) in the child before resuming or calling C. Again, you I to call it on I loop that you want to re-use after a fork, I. This is because some kernel interfaces *cough* I *cough* do funny things during fork. On the other hand, you only need to call this function in the child process if and only if you want to use the event loop in the child. If you just fork+exec or create a new loop in the child, you don't have to call it at all (in fact, C is so badly broken that it makes a difference, but libev will usually detect this case on its own and do a costly reset of the backend). The function itself is quite fast and it's usually not a problem to call it just in case after a fork. Example: Automate calling C on the default loop when using pthreads. static void post_fork_child (void) { ev_loop_fork (EV_DEFAULT); } ... pthread_atfork (0, 0, post_fork_child); =item int ev_is_default_loop (loop) Returns true when the given loop is, in fact, the default loop, and false otherwise. =item unsigned int ev_iteration (loop) Returns the current iteration count for the event loop, which is identical to the number of times libev did poll for new events. It starts at C<0> and happily wraps around with enough iterations. This value can sometimes be useful as a generation counter of sorts (it "ticks" the number of loop iterations), as it roughly corresponds with C and C calls - and is incremented between the prepare and check phases. =item unsigned int ev_depth (loop) Returns the number of times C was entered minus the number of times C was exited normally, in other words, the recursion depth. Outside C, this number is zero. In a callback, this number is C<1>, unless C was invoked recursively (or from another thread), in which case it is higher. Leaving C abnormally (setjmp/longjmp, cancelling the thread, throwing an exception etc.), doesn't count as "exit" - consider this as a hint to avoid such ungentleman-like behaviour unless it's really convenient, in which case it is fully supported. =item unsigned int ev_backend (loop) Returns one of the C flags indicating the event backend in use. =item ev_tstamp ev_now (loop) Returns the current "event loop time", which is the time the event loop received events and started processing them. This timestamp does not change as long as callbacks are being processed, and this is also the base time used for relative timers. You can treat it as the timestamp of the event occurring (or more correctly, libev finding out about it). =item ev_now_update (loop) Establishes the current time by querying the kernel, updating the time returned by C in the progress. This is a costly operation and is usually done automatically within C. This function is rarely useful, but when some event callback runs for a very long time without entering the event loop, updating libev's idea of the current time is a good idea. See also L in the C section. =item ev_suspend (loop) =item ev_resume (loop) These two functions suspend and resume an event loop, for use when the loop is not used for a while and timeouts should not be processed. A typical use case would be an interactive program such as a game: When the user presses C<^Z> to suspend the game and resumes it an hour later it would be best to handle timeouts as if no time had actually passed while the program was suspended. This can be achieved by calling C in your C handler, sending yourself a C and calling C directly afterwards to resume timer processing. Effectively, all C watchers will be delayed by the time spend between C and C, and all C watchers will be rescheduled (that is, they will lose any events that would have occurred while suspended). After calling C you B call I function on the given loop other than C, and you B call C without a previous call to C. Calling C/C has the side effect of updating the event loop time (see C). =item bool ev_run (loop, int flags) Finally, this is it, the event handler. This function usually is called after you have initialised all your watchers and you want to start handling events. It will ask the operating system for any new events, call the watcher callbacks, and then repeat the whole process indefinitely: This is why event loops are called I. If the flags argument is specified as C<0>, it will keep handling events until either no event watchers are active anymore or C was called. The return value is false if there are no more active watchers (which usually means "all jobs done" or "deadlock"), and true in all other cases (which usually means " you should call C again"). Please note that an explicit C is usually better than relying on all watchers to be stopped when deciding when a program has finished (especially in interactive programs), but having a program that automatically loops as long as it has to and no longer by virtue of relying on its watchers stopping correctly, that is truly a thing of beauty. This function is I exception-safe - you can break out of a C call by calling C in a callback, throwing a C++ exception and so on. This does not decrement the C value, nor will it clear any outstanding C breaks. A flags value of C will look for new events, will handle those events and any already outstanding ones, but will not wait and block your process in case there are no events and will return after one iteration of the loop. This is sometimes useful to poll and handle new events while doing lengthy calculations, to keep the program responsive. A flags value of C will look for new events (waiting if necessary) and will handle those and any already outstanding ones. It will block your process until at least one new event arrives (which could be an event internal to libev itself, so there is no guarantee that a user-registered callback will be called), and will return after one iteration of the loop. This is useful if you are waiting for some external event in conjunction with something not expressible using other libev watchers (i.e. "roll your own C"). However, a pair of C/C watchers is usually a better approach for this kind of thing. Here are the gory details of what C does (this is for your understanding, not a guarantee that things will work exactly like this in future versions): - Increment loop depth. - Reset the ev_break status. - Before the first iteration, call any pending watchers. LOOP: - If EVFLAG_FORKCHECK was used, check for a fork. - If a fork was detected (by any means), queue and call all fork watchers. - Queue and call all prepare watchers. - If ev_break was called, goto FINISH. - If we have been forked, detach and recreate the kernel state as to not disturb the other process. - Update the kernel state with all outstanding changes. - Update the "event loop time" (ev_now ()). - Calculate for how long to sleep or block, if at all (active idle watchers, EVRUN_NOWAIT or not having any active watchers at all will result in not sleeping). - Sleep if the I/O and timer collect interval say so. - Increment loop iteration counter. - Block the process, waiting for any events. - Queue all outstanding I/O (fd) events. - Update the "event loop time" (ev_now ()), and do time jump adjustments. - Queue all expired timers. - Queue all expired periodics. - Queue all idle watchers with priority higher than that of pending events. - Queue all check watchers. - Call all queued watchers in reverse order (i.e. check watchers first). Signals and child watchers are implemented as I/O watchers, and will be handled here by queueing them when their watcher gets executed. - If ev_break has been called, or EVRUN_ONCE or EVRUN_NOWAIT were used, or there are no active watchers, goto FINISH, otherwise continue with step LOOP. FINISH: - Reset the ev_break status iff it was EVBREAK_ONE. - Decrement the loop depth. - Return. Example: Queue some jobs and then loop until no events are outstanding anymore. ... queue jobs here, make sure they register event watchers as long ... as they still have work to do (even an idle watcher will do..) ev_run (my_loop, 0); ... jobs done or somebody called break. yeah! =item ev_break (loop, how) Can be used to make a call to C return early (but only after it has processed all outstanding events). The C argument must be either C, which will make the innermost C call return, or C, which will make all nested C calls return. This "break state" will be cleared on the next call to C. It is safe to call C from outside any C calls, too, in which case it will have no effect. =item ev_ref (loop) =item ev_unref (loop) Ref/unref can be used to add or remove a reference count on the event loop: Every watcher keeps one reference, and as long as the reference count is nonzero, C will not return on its own. This is useful when you have a watcher that you never intend to unregister, but that nevertheless should not keep C from returning. In such a case, call C after starting, and C before stopping it. As an example, libev itself uses this for its internal signal pipe: It is not visible to the libev user and should not keep C from exiting if no event watchers registered by it are active. It is also an excellent way to do this for generic recurring timers or from within third-party libraries. Just remember to I and I (but only if the watcher wasn't active before, or was active before, respectively. Note also that libev might stop watchers itself (e.g. non-repeating timers) in which case you have to C in the callback). Example: Create a signal watcher, but keep it from keeping C running when nothing else is active. ev_signal exitsig; ev_signal_init (&exitsig, sig_cb, SIGINT); ev_signal_start (loop, &exitsig); ev_unref (loop); Example: For some weird reason, unregister the above signal handler again. ev_ref (loop); ev_signal_stop (loop, &exitsig); =item ev_set_io_collect_interval (loop, ev_tstamp interval) =item ev_set_timeout_collect_interval (loop, ev_tstamp interval) These advanced functions influence the time that libev will spend waiting for events. Both time intervals are by default C<0>, meaning that libev will try to invoke timer/periodic callbacks and I/O callbacks with minimum latency. Setting these to a higher value (the C I be >= C<0>) allows libev to delay invocation of I/O and timer/periodic callbacks to increase efficiency of loop iterations (or to increase power-saving opportunities). The idea is that sometimes your program runs just fast enough to handle one (or very few) event(s) per loop iteration. While this makes the program responsive, it also wastes a lot of CPU time to poll for new events, especially with backends like C (or libev) on file descriptors representing files, and expect it to become ready when their program doesn't block on disk accesses (which can take a long time on their own). However, this cannot ever work in the "expected" way - you get a readiness notification as soon as the kernel knows whether and how much data is there, and in the case of open files, that's always the case, so you always get a readiness notification instantly, and your read (or possibly write) will still block on the disk I/O. Another way to view it is that in the case of sockets, pipes, character devices and so on, there is another party (the sender) that delivers data on its own, but in the case of files, there is no such thing: the disk will not send data on its own, simply because it doesn't know what you wish to read - you would first have to request some data. Since files are typically not-so-well supported by advanced notification mechanism, libev tries hard to emulate POSIX behaviour with respect to files, even though you should not use it. The reason for this is convenience: sometimes you want to watch STDIN or STDOUT, which is usually a tty, often a pipe, but also sometimes files or special devices (for example, C on Linux works with F but not with F), and even though the file might better be served with asynchronous I/O instead of with non-blocking I/O, it is still useful when it "just works" instead of freezing. So avoid file descriptors pointing to files when you know it (e.g. use libeio), but use them when it is convenient, e.g. for STDIN/STDOUT, or when you rarely read from a file instead of from a socket, and want to reuse the same code path. =head3 The special problem of fork Some backends (epoll, kqueue) do not support C at all or exhibit useless behaviour. Libev fully supports fork, but needs to be told about it in the child if you want to continue to use it in the child. To support fork in your child processes, you have to call C after a fork in the child, enable C, or resort to C or C. =head3 The special problem of SIGPIPE While not really specific to libev, it is easy to forget about C: when writing to a pipe whose other end has been closed, your program gets sent a SIGPIPE, which, by default, aborts your program. For most programs this is sensible behaviour, for daemons, this is usually undesirable. So when you encounter spurious, unexplained daemon exits, make sure you ignore SIGPIPE (and maybe make sure you log the exit status of your daemon somewhere, as that would have given you a big clue). =head3 The special problem of accept()ing when you can't Many implementations of the POSIX C function (for example, found in post-2004 Linux) have the peculiar behaviour of not removing a connection from the pending queue in all error cases. For example, larger servers often run out of file descriptors (because of resource limits), causing C to fail with C but not rejecting the connection, leading to libev signalling readiness on the next iteration again (the connection still exists after all), and typically causing the program to loop at 100% CPU usage. Unfortunately, the set of errors that cause this issue differs between operating systems, there is usually little the app can do to remedy the situation, and no known thread-safe method of removing the connection to cope with overload is known (to me). One of the easiest ways to handle this situation is to just ignore it - when the program encounters an overload, it will just loop until the situation is over. While this is a form of busy waiting, no OS offers an event-based way to handle this situation, so it's the best one can do. A better way to handle the situation is to log any errors other than C and C, making sure not to flood the log with such messages, and continue as usual, which at least gives the user an idea of what could be wrong ("raise the ulimit!"). For extra points one could stop the C watcher on the listening fd "for a while", which reduces CPU usage. If your program is single-threaded, then you could also keep a dummy file descriptor for overload situations (e.g. by opening F), and when you run into C or C, close it, run C, close that fd, and create a new dummy fd. This will gracefully refuse clients under typical overload conditions. The last way to handle it is to simply log the error and C, as is often done with C failures, but this results in an easy opportunity for a DoS attack. =head3 Watcher-Specific Functions =over 4 =item ev_io_init (ev_io *, callback, int fd, int events) =item ev_io_set (ev_io *, int fd, int events) Configures an C watcher. The C is the file descriptor to receive events for and C is either C, C or C, to express the desire to receive the given events. =item int fd [read-only] The file descriptor being watched. =item int events [read-only] The events being watched. =back =head3 Examples Example: Call C when STDIN_FILENO has become, well readable, but only once. Since it is likely line-buffered, you could attempt to read a whole line in the callback. static void stdin_readable_cb (struct ev_loop *loop, ev_io *w, int revents) { ev_io_stop (loop, w); .. read from stdin here (or from w->fd) and handle any I/O errors } ... struct ev_loop *loop = ev_default_init (0); ev_io stdin_readable; ev_io_init (&stdin_readable, stdin_readable_cb, STDIN_FILENO, EV_READ); ev_io_start (loop, &stdin_readable); ev_run (loop, 0); =head2 C - relative and optionally repeating timeouts Timer watchers are simple relative timers that generate an event after a given time, and optionally repeating in regular intervals after that. The timers are based on real time, that is, if you register an event that times out after an hour and you reset your system clock to January last year, it will still time out after (roughly) one hour. "Roughly" because detecting time jumps is hard, and some inaccuracies are unavoidable (the monotonic clock option helps a lot here). The callback is guaranteed to be invoked only I its timeout has passed (not I, so on systems with very low-resolution clocks this might introduce a small delay, see "the special problem of being too early", below). If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones of the same priority with later time-out values (but this is no longer true when a callback calls C recursively). =head3 Be smart about timeouts Many real-world problems involve some kind of timeout, usually for error recovery. A typical example is an HTTP request - if the other side hangs, you want to raise some error after a while. What follows are some ways to handle this problem, from obvious and inefficient to smart and efficient. In the following, a 60 second activity timeout is assumed - a timeout that gets reset to 60 seconds each time there is activity (e.g. each time some data or other life sign was received). =over 4 =item 1. Use a timer and stop, reinitialise and start it on activity. This is the most obvious, but not the most simple way: In the beginning, start the watcher: ev_timer_init (timer, callback, 60., 0.); ev_timer_start (loop, timer); Then, each time there is some activity, C it, initialise it and start it again: ev_timer_stop (loop, timer); ev_timer_set (timer, 60., 0.); ev_timer_start (loop, timer); This is relatively simple to implement, but means that each time there is some activity, libev will first have to remove the timer from its internal data structure and then add it again. Libev tries to be fast, but it's still not a constant-time operation. =item 2. Use a timer and re-start it with C inactivity. This is the easiest way, and involves using C instead of C. To implement this, configure an C with a C value of C<60> and then call C at start and each time you successfully read or write some data. If you go into an idle state where you do not expect data to travel on the socket, you can C the timer, and C will automatically restart it if need be. That means you can ignore both the C function and the C argument to C, and only ever use the C member and C. At start: ev_init (timer, callback); timer->repeat = 60.; ev_timer_again (loop, timer); Each time there is some activity: ev_timer_again (loop, timer); It is even possible to change the time-out on the fly, regardless of whether the watcher is active or not: timer->repeat = 30.; ev_timer_again (loop, timer); This is slightly more efficient then stopping/starting the timer each time you want to modify its timeout value, as libev does not have to completely remove and re-insert the timer from/into its internal data structure. It is, however, even simpler than the "obvious" way to do it. =item 3. Let the timer time out, but then re-arm it as required. This method is more tricky, but usually most efficient: Most timeouts are relatively long compared to the intervals between other activity - in our example, within 60 seconds, there are usually many I/O events with associated activity resets. In this case, it would be more efficient to leave the C alone, but remember the time of last activity, and check for a real timeout only within the callback: ev_tstamp timeout = 60.; ev_tstamp last_activity; // time of last activity ev_timer timer; static void callback (EV_P_ ev_timer *w, int revents) { // calculate when the timeout would happen ev_tstamp after = last_activity - ev_now (EV_A) + timeout; // if negative, it means we the timeout already occurred if (after < 0.) { // timeout occurred, take action } else { // callback was invoked, but there was some recent // activity. simply restart the timer to time out // after "after" seconds, which is the earliest time // the timeout can occur. ev_timer_set (w, after, 0.); ev_timer_start (EV_A_ w); } } To summarise the callback: first calculate in how many seconds the timeout will occur (by calculating the absolute time when it would occur, C, and subtracting the current time, C from that). If this value is negative, then we are already past the timeout, i.e. we timed out, and need to do whatever is needed in this case. Otherwise, we now the earliest time at which the timeout would trigger, and simply start the timer with this timeout value. In other words, each time the callback is invoked it will check whether the timeout occurred. If not, it will simply reschedule itself to check again at the earliest time it could time out. Rinse. Repeat. This scheme causes more callback invocations (about one every 60 seconds minus half the average time between activity), but virtually no calls to libev to change the timeout. To start the machinery, simply initialise the watcher and set C to the current time (meaning there was some activity just now), then call the callback, which will "do the right thing" and start the timer: last_activity = ev_now (EV_A); ev_init (&timer, callback); callback (EV_A_ &timer, 0); When there is some activity, simply store the current time in C, no libev calls at all: if (activity detected) last_activity = ev_now (EV_A); When your timeout value changes, then the timeout can be changed by simply providing a new value, stopping the timer and calling the callback, which will again do the right thing (for example, time out immediately :). timeout = new_value; ev_timer_stop (EV_A_ &timer); callback (EV_A_ &timer, 0); This technique is slightly more complex, but in most cases where the time-out is unlikely to be triggered, much more efficient. =item 4. Wee, just use a double-linked list for your timeouts. If there is not one request, but many thousands (millions...), all employing some kind of timeout with the same timeout value, then one can do even better: When starting the timeout, calculate the timeout value and put the timeout at the I of the list. Then use an C to fire when the timeout at the I of the list is expected to fire (for example, using the technique #3). When there is some activity, remove the timer from the list, recalculate the timeout, append it to the end of the list again, and make sure to update the C if it was taken from the beginning of the list. This way, one can manage an unlimited number of timeouts in O(1) time for starting, stopping and updating the timers, at the expense of a major complication, and having to use a constant timeout. The constant timeout ensures that the list stays sorted. =back So which method the best? Method #2 is a simple no-brain-required solution that is adequate in most situations. Method #3 requires a bit more thinking, but handles many cases better, and isn't very complicated either. In most case, choosing either one is fine, with #3 being better in typical situations. Method #1 is almost always a bad idea, and buys you nothing. Method #4 is rather complicated, but extremely efficient, something that really pays off after the first million or so of active timers, i.e. it's usually overkill :) =head3 The special problem of being too early If you ask a timer to call your callback after three seconds, then you expect it to be invoked after three seconds - but of course, this cannot be guaranteed to infinite precision. Less obviously, it cannot be guaranteed to any precision by libev - imagine somebody suspending the process with a STOP signal for a few hours for example. So, libev tries to invoke your callback as soon as possible I the delay has occurred, but cannot guarantee this. A less obvious failure mode is calling your callback too early: many event loops compare timestamps with a "elapsed delay >= requested delay", but this can cause your callback to be invoked much earlier than you would expect. To see why, imagine a system with a clock that only offers full second resolution (think windows if you can't come up with a broken enough OS yourself). If you schedule a one-second timer at the time 500.9, then the event loop will schedule your timeout to elapse at a system time of 500 (500.9 truncated to the resolution) + 1, or 501. If an event library looks at the timeout 0.1s later, it will see "501 >= 501" and invoke the callback 0.1s after it was started, even though a one-second delay was requested - this is being "too early", despite best intentions. This is the reason why libev will never invoke the callback if the elapsed delay equals the requested delay, but only when the elapsed delay is larger than the requested delay. In the example above, libev would only invoke the callback at system time 502, or 1.1s after the timer was started. So, while libev cannot guarantee that your callback will be invoked exactly when requested, it I and I guarantee that the requested delay has actually elapsed, or in other words, it always errs on the "too late" side of things. =head3 The special problem of time updates Establishing the current time is a costly operation (it usually takes at least one system call): EV therefore updates its idea of the current time only before and after C collects new events, which causes a growing difference between C and C when handling lots of events in one iteration. The relative timeouts are calculated relative to the C time. This is usually the right thing as this timestamp refers to the time of the event triggering whatever timeout you are modifying/starting. If you suspect event processing to be delayed and you I to base the timeout on the current time, use something like the following to adjust for it: ev_timer_set (&timer, after + (ev_time () - ev_now ()), 0.); If the event loop is suspended for a long time, you can also force an update of the time returned by C by calling C, although that will push the event time of all outstanding events further into the future. =head3 The special problem of unsynchronised clocks Modern systems have a variety of clocks - libev itself uses the normal "wall clock" clock and, if available, the monotonic clock (to avoid time jumps). Neither of these clocks is synchronised with each other or any other clock on the system, so C might return a considerably different time than C or C