1# lock.m4 serial 10 (gettext-0.18) 2dnl Copyright (C) 2005-2010 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Bruno Haible. 8 9AC_DEFUN([gl_LOCK], 10[ 11 AC_REQUIRE([gl_THREADLIB]) 12 if test "$gl_threads_api" = posix; then 13 # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the 14 # pthread_rwlock_* functions. 15 AC_CHECK_TYPE([pthread_rwlock_t], 16 [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], 17 [Define if the POSIX multithreading library has read/write locks.])], 18 [], 19 [#include <pthread.h>]) 20 # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro. 21 AC_TRY_COMPILE([#include <pthread.h>], 22 [#if __FreeBSD__ == 4 23error "No, in FreeBSD 4.0 recursive mutexes actually don't work." 24#else 25int x = (int)PTHREAD_MUTEX_RECURSIVE; 26return !x; 27#endif], 28 [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], 29 [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])]) 30 fi 31 gl_PREREQ_LOCK 32]) 33 34# Prerequisites of lib/lock.c. 35AC_DEFUN([gl_PREREQ_LOCK], [ 36 AC_REQUIRE([AC_C_INLINE]) 37]) 38