1/* Copyright (C) 2002-2024 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 <pthread.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <time.h>
24#include <sys/time.h>
25
26
27static pthread_mutex_t mut;
28static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
29
30
31static int
32do_test (void)
33{
34 pthread_mutexattr_t ma;
35 int err;
36 struct timespec ts;
37 struct timeval tv;
38
39 if (pthread_mutexattr_init (attr: &ma) != 0)
40 {
41 puts (s: "mutexattr_init failed");
42 exit (1);
43 }
44
45 if (pthread_mutexattr_settype (attr: &ma, kind: PTHREAD_MUTEX_ERRORCHECK) != 0)
46 {
47 puts (s: "mutexattr_settype failed");
48 exit (1);
49 }
50
51 if (pthread_mutex_init (mutex: &mut, mutexattr: &ma) != 0)
52 {
53 puts (s: "mutex_init failed");
54 exit (1);
55 }
56
57 /* Get the mutex. */
58 if (pthread_mutex_lock (mutex: &mut) != 0)
59 {
60 puts (s: "mutex_lock failed");
61 exit (1);
62 }
63
64 /* Waiting for the condition will fail. But we want the timeout here. */
65 if (gettimeofday (tv: &tv, NULL) != 0)
66 {
67 puts (s: "gettimeofday failed");
68 exit (1);
69 }
70
71 TIMEVAL_TO_TIMESPEC (&tv, &ts);
72 ts.tv_nsec += 500000000;
73 if (ts.tv_nsec >= 1000000000)
74 {
75 ts.tv_nsec -= 1000000000;
76 ++ts.tv_sec;
77 }
78 err = pthread_cond_timedwait (cond: &cond, mutex: &mut, abstime: &ts);
79 if (err == 0)
80 {
81 /* This could in theory happen but here without any signal and
82 additional waiter it should not. */
83 puts (s: "cond_timedwait succeeded");
84 exit (1);
85 }
86 else if (err != ETIMEDOUT)
87 {
88 printf (format: "cond_timedwait returned with %s\n", strerror (errnum: err));
89 exit (1);
90 }
91
92 err = pthread_mutex_unlock (mutex: &mut);
93 if (err != 0)
94 {
95 printf (format: "mutex_unlock failed: %s\n", strerror (errnum: err));
96 exit (1);
97 }
98
99 return 0;
100}
101
102
103#define TEST_FUNCTION do_test ()
104#include "../test-skeleton.c"
105

source code of glibc/sysdeps/pthread/tst-cond5.c