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688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* 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_signal_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_signal (cond->cond);
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}
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compat_symbol (libpthread, __pthread_cond_signal_2_0, pthread_cond_signal,
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GLIBC_2_0);
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#endif
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