1 | /* C11 threads condition timed wait variable tests. |
2 | Copyright (C) 2018-2024 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 |
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: &mutex) != thrd_success) |
37 | FAIL_EXIT1 ("mtx_lock failed" ); |
38 | if (cnd_signal (cond: &cond) != thrd_success) |
39 | FAIL_EXIT1 ("cnd_signal failed" ); |
40 | if (mtx_unlock (mutex: &mutex) != thrd_success) |
41 | FAIL_EXIT1 ("mtx_unlock" ); |
42 | |
43 | thrd_exit (res: thrd_success); |
44 | } |
45 | |
46 | static int |
47 | do_test (void) |
48 | { |
49 | thrd_t id; |
50 | struct timespec w_time; |
51 | |
52 | if (cnd_init (cond: &cond) != thrd_success) |
53 | FAIL_EXIT1 ("cnd_init failed" ); |
54 | if (mtx_init (mutex: &mutex, type: mtx_plain) != thrd_success) |
55 | FAIL_EXIT1 ("mtx_init failed" ); |
56 | if (mtx_lock (mutex: &mutex) != thrd_success) |
57 | FAIL_EXIT1 ("mtx_lock failed" ); |
58 | |
59 | if (clock_gettime (CLOCK_REALTIME, tp: &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 (thr: &id, func: signal_parent, NULL) != thrd_success) |
67 | FAIL_EXIT1 ("thrd_create failed" ); |
68 | |
69 | if (cnd_timedwait (cond: &cond, mutex: &mutex, time_point: &w_time) != thrd_success) |
70 | FAIL_EXIT1 ("cnd_timedwait failed" ); |
71 | |
72 | if (thrd_join (thr: id, NULL) != thrd_success) |
73 | FAIL_EXIT1 ("thrd_join failed" ); |
74 | |
75 | if (mtx_unlock (mutex: &mutex) != thrd_success) |
76 | FAIL_EXIT1 ("mtx_unlock" ); |
77 | |
78 | mtx_destroy (mutex: &mutex); |
79 | cnd_destroy (COND: &cond); |
80 | |
81 | return 0; |
82 | } |
83 | |
84 | #include <support/test-driver.c> |
85 | |