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# pthread_mutex_timedlock.m4
# serial 6
dnl Copyright (C) 2019-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_PTHREAD_MUTEX_TIMEDLOCK],
[
AC_REQUIRE([gl_PTHREAD_H_DEFAULTS])
AC_CHECK_DECL([pthread_mutex_timedlock],
[dnl Test whether the gnulib module 'threadlib' is in use.
dnl Some packages like Emacs use --avoid=threadlib.
dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
m4_ifdef([gl_][THREADLIB], [
AC_REQUIRE([gl_][THREADLIB])
dnl Test whether the function actually exists.
dnl FreeBSD 5.2.1 declares it but does not define it.
AC_CACHE_CHECK([for pthread_mutex_timedlock],
[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD],
[gl_saved_LIBS="$LIBS"
LIBS="$LIBS $LIBMULTITHREAD"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <pthread.h>
#include <time.h>
]],
[[pthread_mutex_t lock;
struct timespec ts = { 0 };
return pthread_mutex_timedlock (&lock, &ts);
]])
],
[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD=yes],
[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD=no])
LIBS="$gl_saved_LIBS"
])
if test $gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD != yes; then
HAVE_PTHREAD_MUTEX_TIMEDLOCK=0
fi
], [
:
])
],
[HAVE_PTHREAD_MUTEX_TIMEDLOCK=0],
[[#include <pthread.h>]])
])
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