1/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <stdlib.h>
21#include "pthreadP.h"
22#include <atomic.h>
23#include <shlib-compat.h>
24
25
26#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
27int
28__pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex,
29 const struct timespec *abstime)
30{
31 if (cond->cond == NULL)
32 {
33 pthread_cond_t *newcond;
34
35 newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
36 if (newcond == NULL)
37 return ENOMEM;
38
39 if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
40 /* Somebody else just initialized the condvar. */
41 free (newcond);
42 }
43
44 return __pthread_cond_timedwait (cond->cond, mutex, abstime);
45}
46compat_symbol (libpthread, __pthread_cond_timedwait_2_0,
47 pthread_cond_timedwait, GLIBC_2_0);
48#endif
49