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# lock.m4 serial 10 (gettext-0.18) |
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dnl Copyright (C) 2005-2010 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 From Bruno Haible. |
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AC_DEFUN([gl_LOCK], |
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[ |
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AC_REQUIRE([gl_THREADLIB]) |
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if test "$gl_threads_api" = posix; then |
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# OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the |
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# pthread_rwlock_* functions. |
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AC_CHECK_TYPE([pthread_rwlock_t], |
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[AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], |
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[Define if the POSIX multithreading library has read/write locks.])], |
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[], |
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[#include <pthread.h>]) |
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# glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro. |
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AC_TRY_COMPILE([#include <pthread.h>], |
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[#if __FreeBSD__ == 4 |
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error "No, in FreeBSD 4.0 recursive mutexes actually don't work." |
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#else |
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int x = (int)PTHREAD_MUTEX_RECURSIVE; |
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return !x; |
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#endif], |
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[AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], |
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[Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])]) |
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fi |
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gl_PREREQ_LOCK |
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]) |
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# Prerequisites of lib/lock.c. |
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AC_DEFUN([gl_PREREQ_LOCK], [ |
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AC_REQUIRE([AC_C_INLINE]) |
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]) |
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