1/* Test pthread_cond_clockwait timeout.
2
3 Copyright (C) 2019-2024 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
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 <errno.h>
21#include <pthread.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <time.h>
26#include <sys/time.h>
27#include <support/check.h>
28#include <support/timespec.h>
29#include <support/xthread.h>
30
31
32static pthread_mutex_t mut = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP;
33static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
34
35
36static int
37do_test_clock (clockid_t clockid)
38{
39 /* Get the mutex. */
40 xpthread_mutex_lock (mutex: &mut);
41
42 /* Waiting for the condition will fail. But we want the timeout here. */
43 const struct timespec ts_now = xclock_now (clock: clockid);
44 const struct timespec ts_timeout =
45 timespec_add (ts_now, make_timespec (s: 0, ns: 500000000));
46
47 /* In theory pthread_cond_clockwait could return zero here due to
48 spurious wakeup. However that can't happen without a signal or an
49 additional waiter. */
50 TEST_COMPARE (pthread_cond_clockwait (&cond, &mut, clockid, &ts_timeout),
51 ETIMEDOUT);
52
53 xpthread_mutex_unlock (mutex: &mut);
54
55 return 0;
56}
57
58static int
59do_test (void)
60{
61 do_test_clock (CLOCK_MONOTONIC);
62 do_test_clock (CLOCK_REALTIME);
63 return 0;
64}
65
66#include <support/test-driver.c>
67

source code of glibc/sysdeps/pthread/tst-cond27.c