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38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
# lock.m4 serial 9 (gettext-0.18)
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dnl Copyright (C) 2005-2008 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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