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/* 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;
newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
if (newcond == NULL)
return ENOMEM;
*newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
atomic_write_barrier ();
if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
/* 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
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