1/* sem_timedwait -- wait on a semaphore with timeout.
2 Copyright (C) 2003-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <time.h>
21#include "sem_waitcommon.c"
22
23/* This is in a separate file because because sem_timedwait is only provided
24 if __USE_XOPEN2K is defined. */
25int
26sem_timedwait (sem_t *sem, const struct timespec *abstime)
27{
28 if (! valid_nanoseconds (abstime->tv_nsec))
29 {
30 __set_errno (EINVAL);
31 return -1;
32 }
33
34 /* Check sem_wait.c for a more detailed explanation why it is required. */
35 __pthread_testcancel ();
36
37 if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
38 return 0;
39 else
40 return __new_sem_wait_slow ((struct new_sem *) sem,
41 CLOCK_REALTIME, abstime);
42}
43