1/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <stdlib.h>
20#include "pthreadP.h"
21#include <atomic.h>
22#include <shlib-compat.h>
23
24
25#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_3_2)
26int
27__pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex,
28 const struct timespec *abstime)
29{
30 if (cond->cond == NULL)
31 {
32 pthread_cond_t *newcond;
33
34 newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
35 if (newcond == NULL)
36 return ENOMEM;
37
38 if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
39 /* Somebody else just initialized the condvar. */
40 free (newcond);
41 }
42
43 return __pthread_cond_timedwait (cond->cond, mutex, abstime);
44}
45compat_symbol (libpthread, __pthread_cond_timedwait_2_0,
46 pthread_cond_timedwait, GLIBC_2_0);
47#endif
48

source code of glibc/nptl/old_pthread_cond_timedwait.c