blob: 041762ae35a3011631f5c8880db52bb08223cca1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/* C11 threads condition variable tests.
Copyright (C) 2018-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <threads.h>
#include <stdio.h>
#include <unistd.h>
#include <support/check.h>
/* Shared condition variable between child and parent. */
static cnd_t cond;
/* Mutex needed to signal and wait threads. */
static mtx_t mutex;
static int
signal_parent (void)
{
/* Acquire the lock so that cnd_signal does not run until
cnd_timedwait has been called. */
if (mtx_lock (&mutex) != thrd_success)
FAIL_EXIT1 ("mtx_lock failed");
if (cnd_signal (&cond) != thrd_success)
FAIL_EXIT1 ("cnd_signal");
if (mtx_unlock (&mutex) != thrd_success)
FAIL_EXIT1 ("mtx_unlock");
thrd_exit (thrd_success);
}
static int
do_test (void)
{
thrd_t id;
if (cnd_init (&cond) != thrd_success)
FAIL_EXIT1 ("cnd_init failed");
if (mtx_init (&mutex, mtx_plain) != thrd_success)
FAIL_EXIT1 ("mtx_init failed");
if (mtx_lock (&mutex) != thrd_success)
FAIL_EXIT1 ("mtx_lock failed");
if (thrd_create (&id, (thrd_start_t) signal_parent, NULL)
!= thrd_success)
FAIL_EXIT1 ("thrd_create failed");
if (cnd_wait (&cond, &mutex) != thrd_success)
FAIL_EXIT1 ("cnd_wait failed");
/* Joining is not mandatory here, but still done to assure child thread
ends correctly. */
if (thrd_join (id, NULL) != thrd_success)
FAIL_EXIT1 ("thrd_join failed");
if (mtx_unlock (&mutex) != thrd_success)
FAIL_EXIT1 ("mtx_unlock");
mtx_destroy (&mutex);
cnd_destroy (&cond);
return 0;
}
#include <support/test-driver.c>
|
