1 /* Test pthread_mutex_timedlock.
2 Copyright (C) 2000-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
29 main (int argc
, char **argv
)
33 pthread_mutex_t m
= PTHREAD_MUTEX_INITIALIZER
;
34 struct timeval before
, after
;
37 gettimeofday (&before
, 0);
38 ts
.tv_sec
= before
.tv_sec
+ 1;
39 ts
.tv_nsec
= before
.tv_usec
* 1000;
41 printf ("Starting wait @ %d\n", (int) before
.tv_sec
);
43 pthread_mutex_lock (&m
);
44 /* A default mutex shall dead lock if locked twice. As such we do
45 not need spawn a second thread. */
46 err
= pthread_mutex_timedlock (&m
, &ts
);
47 assert (err
== ETIMEDOUT
);
49 gettimeofday (&after
, 0);
51 printf ("End wait @ %d\n", (int) after
.tv_sec
);
53 diff
= after
.tv_sec
* 1000000 + after
.tv_usec
54 - before
.tv_sec
* 1000000 - before
.tv_usec
;
56 if (diff
< 900000 || diff
> 1100000)
57 error (1, EGRATUITOUS
, "pthread_mutex_timedlock waited %d us", diff
);