glibc/nptl/old_pthread_cond_signal.c
Ulrich Drepper 5a3ab2fc18 Update.
2003-03-21  Ulrich Drepper  <drepper@redhat.com>

	* cancellation.c: Adjust for new form of compare&exchange macros.
	* cleanup_defer.c: Likewise.
	* init.c: Likewise.
	* libc-cancellation.c: Likewise.
	* old_pthread_cond_broadcast.c: Likewise.
	* old_pthread_cond_signal.c: Likewise.
	* old_pthread_cond_timedwait.c: Likewise.
	* old_pthread_cond_wait.c: Likewise.
	* pthread_cancel.c: Likewise.
	* pthread_create.c: Likewise.
	* pthread_detach.c: Likewise.
	* pthread_join.c: Likewise.
	* pthread_key_delete.c: Likewise.
	* pthread_setcancelstate.c: Likewise.
	* pthread_setcanceltype.c: Likewise.
	* pthread_timedjoin.c: Likewise.
	* pthread_tryjoin.c: Likewise.
	* sysdeps/pthread/createthread.c: Likewise.
2003-03-21 08:03:25 +00:00

59 lines
1.8 KiB
C

/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <stdlib.h>
#include "pthreadP.h"
#include <atomic.h>
#include <shlib-compat.h>
#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
int
__pthread_cond_signal_2_0 (cond)
pthread_cond_2_0_t *cond;
{
if (cond->cond == NULL)
{
pthread_cond_t *newcond;
#if LLL_MUTEX_LOCK_INITIALIZER == 0
newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
if (newcond == NULL)
return ENOMEM;
#else
newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
if (newcond == NULL)
return ENOMEM;
/* Initialize the condvar. */
(void) pthread_cond_init (newcond, NULL);
#endif
if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
/* Somebody else just initialized the condvar. */
free (newcond);
}
return __pthread_cond_signal (cond->cond);
}
compat_symbol (libpthread, __pthread_cond_signal_2_0, pthread_cond_signal,
GLIBC_2_0);
#endif