| # lock.m4 serial 11 (gettext-0.18.2) |
| dnl Copyright (C) 2005-2011 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. |
| |
| dnl From Bruno Haible. |
| |
| AC_DEFUN([gl_LOCK], |
| [ |
| AC_REQUIRE([gl_THREADLIB]) |
| if test "$gl_threads_api" = posix; then |
| # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the |
| # pthread_rwlock_* functions. |
| AC_CHECK_TYPE([pthread_rwlock_t], |
| [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], |
| [Define if the POSIX multithreading library has read/write locks.])], |
| [], |
| [#include <pthread.h>]) |
| # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro. |
| AC_COMPILE_IFELSE([ |
| AC_LANG_PROGRAM( |
| [[#include <pthread.h>]], |
| [[ |
| #if __FreeBSD__ == 4 |
| error "No, in FreeBSD 4.0 recursive mutexes actually don't work." |
| #else |
| int x = (int)PTHREAD_MUTEX_RECURSIVE; |
| return !x; |
| #endif |
| ]])], |
| [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], |
| [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])]) |
| fi |
| gl_PREREQ_LOCK |
| ]) |
| |
| # Prerequisites of lib/lock.c. |
| AC_DEFUN([gl_PREREQ_LOCK], [ |
| AC_REQUIRE([AC_C_INLINE]) |
| ]) |
