1 /* C11 threads condition timed wait variable tests.
2 Copyright (C) 2018-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 <threads.h>
20 #include <stdio.h>
21 #include <unistd.h>
22
23 #include <support/check.h>
24
25 /* Shared condition variable between child and parent. */
26 static cnd_t cond;
27
28 /* Mutex needed to signal and wait threads. */
29 static mtx_t mutex;
30
31 static int
signal_parent(void * arg)32 signal_parent (void *arg)
33 {
34 /* Acquire the lock so that cnd_signal does not run until
35 cnd_timedwait has been called. */
36 if (mtx_lock (&mutex) != thrd_success)
37 FAIL_EXIT1 ("mtx_lock failed");
38 if (cnd_signal (&cond) != thrd_success)
39 FAIL_EXIT1 ("cnd_signal failed");
40 if (mtx_unlock (&mutex) != thrd_success)
41 FAIL_EXIT1 ("mtx_unlock");
42
43 thrd_exit (thrd_success);
44 }
45
46 static int
do_test(void)47 do_test (void)
48 {
49 thrd_t id;
50 struct timespec w_time;
51
52 if (cnd_init (&cond) != thrd_success)
53 FAIL_EXIT1 ("cnd_init failed");
54 if (mtx_init (&mutex, mtx_plain) != thrd_success)
55 FAIL_EXIT1 ("mtx_init failed");
56 if (mtx_lock (&mutex) != thrd_success)
57 FAIL_EXIT1 ("mtx_lock failed");
58
59 if (clock_gettime (CLOCK_REALTIME, &w_time) != 0)
60 FAIL_EXIT1 ("clock_gettime failed");
61
62 /* This needs to be sufficiently long to prevent the cnd_timedwait
63 call from timing out. */
64 w_time.tv_sec += 3600;
65
66 if (thrd_create (&id, signal_parent, NULL) != thrd_success)
67 FAIL_EXIT1 ("thrd_create failed");
68
69 if (cnd_timedwait (&cond, &mutex, &w_time) != thrd_success)
70 FAIL_EXIT1 ("cnd_timedwait failed");
71
72 if (thrd_join (id, NULL) != thrd_success)
73 FAIL_EXIT1 ("thrd_join failed");
74
75 if (mtx_unlock (&mutex) != thrd_success)
76 FAIL_EXIT1 ("mtx_unlock");
77
78 mtx_destroy (&mutex);
79 cnd_destroy (&cond);
80
81 return 0;
82 }
83
84 #include <support/test-driver.c>
85