diff options
Diffstat (limited to 'gnulib-m4/pthread_mutex_timedlock.m4')
| -rw-r--r-- | gnulib-m4/pthread_mutex_timedlock.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/gnulib-m4/pthread_mutex_timedlock.m4 b/gnulib-m4/pthread_mutex_timedlock.m4 new file mode 100644 index 00000000..9b175d54 --- /dev/null +++ b/gnulib-m4/pthread_mutex_timedlock.m4 @@ -0,0 +1,48 @@ +# 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>]]) +]) |