1 # lock.m4 serial 13 (gettext-0.18.2) 2 dnl Copyright (C) 2005-2012 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl From Bruno Haible. 8 9 AC_DEFUN([gl_LOCK], 10 [ 11 AC_REQUIRE([gl_THREADLIB]) 12 if test "$gl_threads_api" = posix; then 13 # OSF/1 4.0 and Mac OS 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_COMPILE_IFELSE([ 22 AC_LANG_PROGRAM( 23 [[#include <pthread.h>]], 24 [[ 25 #if __FreeBSD__ == 4 26 error "No, in FreeBSD 4.0 recursive mutexes actually don't work." 27 #else 28 int x = (int)PTHREAD_MUTEX_RECURSIVE; 29 return !x; 30 #endif 31 ]])], 32 [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], 33 [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])]) 34 fi 35 gl_PREREQ_LOCK 36 ]) 37 38 # Prerequisites of lib/glthread/lock.c. 39 AC_DEFUN([gl_PREREQ_LOCK], [:]) 40
