1 /* Test condition attributes and pthread_cond_timedwait.
2 Copyright (C) 2000-2023 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_condattr_t attr
;
36 pthread_mutex_t m
= PTHREAD_MUTEX_INITIALIZER
;
37 struct timeval before
, after
;
40 err
= pthread_condattr_init (&attr
);
42 error (1, err
, "pthread_condattr_init");
44 err
= pthread_condattr_getpshared (&attr
, &i
);
46 error (1, err
, "pthread_condattr_getpshared");
47 assert (i
== PTHREAD_PROCESS_PRIVATE
);
49 err
= pthread_condattr_setpshared (&attr
, PTHREAD_PROCESS_PRIVATE
);
52 err
= pthread_cond_init (&cond
, &attr
);
54 error (1, err
, "pthread_cond_init");
56 err
= pthread_condattr_destroy (&attr
);
58 error (1, err
, "pthread_condattr_destroy");
60 gettimeofday (&before
, 0);
61 ts
.tv_sec
= before
.tv_sec
+ 1;
62 ts
.tv_nsec
= before
.tv_usec
* 1000;
64 printf ("Starting wait @ %d\n", (int) before
.tv_sec
);
66 pthread_mutex_lock (&m
);
67 err
= pthread_cond_timedwait (&cond
, &m
, &ts
);
69 gettimeofday (&after
, 0);
71 printf ("End wait @ %d (err = %d)\n", (int) after
.tv_sec
, err
);
73 assert (err
== ETIMEDOUT
);
75 diff
= after
.tv_sec
* 1000000 + after
.tv_usec
76 - before
.tv_sec
* 1000000 - before
.tv_usec
;
78 if (diff
< 900000 || diff
> 1100000)
79 error (1, EGRATUITOUS
, "pthread_cond_timedwait waited %d us", diff
);