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dnl Copyright (C) 2010 Vincent Torri <vtorri at univ-evry dot fr>
dnl rwlock code added by Mike Blumenkrantz <mike at zentific dot com>
dnl This code is public domain and can be freely used or copied.
dnl Macro that check if POSIX or Win32 threads library is available or not.
dnl Usage: EFL_CHECK_THREADS(ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
dnl Call AC_SUBST(EFL_PTHREAD_CFLAGS)
dnl Call AC_SUBST(EFL_PTHREAD_LIBS)
dnl Defines EFL_HAVE_POSIX_THREADS or EFL_HAVE_WIN32_THREADS, and EFL_HAVE_THREADS
AC_DEFUN([EFL_CHECK_THREADS],
[
dnl Generic thread detection
EFL_PTHREAD_CFLAGS=""
EFL_PTHREAD_LIBS=""
_efl_enable_posix_threads="no"
_efl_have_posix_threads="no"
_efl_have_win32_threads="no"
case "$host_os" in
mingw*)
_efl_have_win32_threads="yes"
efl_have_setaffinity="yes"
AC_DEFINE([EFL_HAVE_WIN32_THREADS], [1], [Define to mention that Win32 threads are supported])
AC_DEFINE([EFL_HAVE_THREADS], [1], [Define to mention that POSIX or Win32 threads are supported])
;;
*)
_efl_enable_posix_threads="yes"
_efl_threads_cflags="-D_REENTRANT"
_efl_threads_libs="-lpthread"
;;
esac
dnl check if the compiler supports POSIX threads
if test "x${_efl_enable_posix_threads}" = "xyes" ; then
SAVE_CFLAGS=${CFLAGS}
CFLAGS="${CFLAGS} ${_efl_threads_cflags}"
SAVE_LIBS=${LIBS}
LIBS="${LIBS} ${_efl_threads_libs}"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <pthread.h>
]],
[[
pthread_t id;
id = pthread_self();
]])],
[
_efl_have_posix_threads="yes"
AC_DEFINE([EFL_HAVE_POSIX_THREADS], [1], [Define to mention that POSIX threads are supported])
AC_DEFINE([EFL_HAVE_THREADS], [1], [Define to mention that POSIX or Win32 threads are supported])
EFL_PTHREAD_CFLAGS=${_efl_threads_cflags}
EFL_PTHREAD_LIBS=${_efl_threads_libs}
],
[_efl_have_posix_threads="no"])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <pthread.h>
]],
[[
pthread_barrier_t barrier;
pthread_barrier_init(&barrier, NULL, 1);
]])],
[efl_have_pthread_barrier="yes"],
[efl_have_pthread_barrier="no"])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <pthread.h>
#include <sched.h>
]],
[[
pthread_attr_setaffinity_np(NULL, 0, NULL);
]])],
[efl_have_setaffinity="yes"],
[efl_have_setaffinity="no"])
CFLAGS=${SAVE_CFLAGS}
LIBS=${SAVE_LIBS}
fi
AC_MSG_CHECKING([which threads API is used])
if test "x${_efl_have_posix_threads}" = "xyes" ; then
efl_have_threads="POSIX"
else
if test "x${_efl_have_win32_threads}" = "xyes" ; then
efl_have_threads="Windows"
efl_have_pthread_barrier="no"
else
efl_have_threads="no"
efl_have_pthread_barrier="no"
fi
fi
AC_MSG_RESULT([${efl_have_threads}])
AC_SUBST(EFL_PTHREAD_CFLAGS)
AC_SUBST(EFL_PTHREAD_LIBS)
dnl check if the compiler supports pthreads spinlock
efl_have_posix_threads_spinlock="no"
if test "x${_efl_have_posix_threads}" = "xyes" ; then
SAVE_CFLAGS=${CFLAGS}
CFLAGS="${CFLAGS} ${EFL_PTHREAD_CFLAGS}"
SAVE_LIBS=${LIBS}
LIBS="${LIBS} ${EFL_PTHREAD_LIBS}"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <pthread.h>
]],
[[
pthread_spinlock_t lock;
int res;
res = pthread_spin_init(&lock, PTHREAD_PROCESS_PRIVATE);
]])],
[efl_have_posix_threads_spinlock="yes"],
[efl_have_posix_threads_spinlock="no"])
CFLAGS=${SAVE_CFLAGS}
LIBS=${SAVE_LIBS}
fi
AC_MSG_CHECKING([whether to build POSIX threads spinlock code])
AC_MSG_RESULT([${efl_have_posix_threads_spinlock}])
if test "x${efl_have_posix_threads_spinlock}" = "xyes" ; then
AC_DEFINE([EFL_HAVE_POSIX_THREADS_SPINLOCK], [1], [Define to mention that POSIX threads spinlocks are supported])
fi
AS_IF([test "x$_efl_have_posix_threads" = "xyes" || test "x$_efl_have_win32_threads" = "xyes"],
[$1],
[m4_if([$2], [$2], [AC_MSG_ERROR([Threads are required.])])])
])
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