49 lines
1.8 KiB
Text
49 lines
1.8 KiB
Text
# pthread_mutex_timedlock.m4
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# serial 6
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dnl Copyright (C) 2019-2025 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This file is offered as-is, without any warranty.
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AC_DEFUN([gl_FUNC_PTHREAD_MUTEX_TIMEDLOCK],
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[
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AC_REQUIRE([gl_PTHREAD_H_DEFAULTS])
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AC_CHECK_DECL([pthread_mutex_timedlock],
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[dnl Test whether the gnulib module 'threadlib' is in use.
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dnl Some packages like Emacs use --avoid=threadlib.
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dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
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dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
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m4_ifdef([gl_][THREADLIB], [
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AC_REQUIRE([gl_][THREADLIB])
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dnl Test whether the function actually exists.
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dnl FreeBSD 5.2.1 declares it but does not define it.
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AC_CACHE_CHECK([for pthread_mutex_timedlock],
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[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD],
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[gl_saved_LIBS="$LIBS"
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LIBS="$LIBS $LIBMULTITHREAD"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <pthread.h>
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#include <time.h>
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]],
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[[pthread_mutex_t lock;
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struct timespec ts = { 0 };
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return pthread_mutex_timedlock (&lock, &ts);
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]])
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],
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[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD=yes],
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[gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD=no])
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LIBS="$gl_saved_LIBS"
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])
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if test $gl_cv_func_pthread_mutex_timedlock_in_LIBMULTITHREAD != yes; then
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HAVE_PTHREAD_MUTEX_TIMEDLOCK=0
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fi
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], [
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:
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])
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],
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[HAVE_PTHREAD_MUTEX_TIMEDLOCK=0],
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[[#include <pthread.h>]])
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])
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