Blame nptl/old_pthread_cond_broadcast.c

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/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <errno.h>
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#include <stdlib.h>
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#include "pthreadP.h"
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#include <atomic.h>
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#include <shlib-compat.h>
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#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
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int
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__pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond)
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{
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  if (cond->cond == NULL)
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    {
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      pthread_cond_t *newcond;
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#if LLL_LOCK_INITIALIZER == 0
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      newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
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      if (newcond == NULL)
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	return ENOMEM;
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#else
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      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
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      if (newcond == NULL)
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	return ENOMEM;
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      /* Initialize the condvar.  */
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      (void) pthread_cond_init (newcond, NULL);
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#endif
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      if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
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	/* Somebody else just initialized the condvar.  */
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	free (newcond);
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    }
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  return __pthread_cond_broadcast (cond->cond);
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}
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compat_symbol (libpthread, __pthread_cond_broadcast_2_0,
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	       pthread_cond_broadcast, GLIBC_2_0);
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#endif