1 /* Test condition attributes and pthread_cond_timedwait.
2 Copyright (C) 2000-2022 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 #define _GNU_SOURCE
20
21 #include <pthread.h>
22 #include <stdio.h>
23 #include <assert.h>
24 #include <error.h>
25 #include <errno.h>
26 #include <sys/time.h>
27
28 int
main(int argc,char ** argv)29 main (int argc, char **argv)
30 {
31 error_t err;
32 int i;
33 pthread_condattr_t attr;
34 pthread_cond_t cond;
35 struct timespec ts;
36 pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
37 struct timeval before, after;
38 int diff;
39
40 err = pthread_condattr_init (&attr);
41 if (err)
42 error (1, err, "pthread_condattr_init");
43
44 err = pthread_condattr_getpshared (&attr, &i);
45 if (err)
46 error (1, err, "pthread_condattr_getpshared");
47 assert (i == PTHREAD_PROCESS_PRIVATE);
48
49 err = pthread_condattr_setpshared (&attr, PTHREAD_PROCESS_PRIVATE);
50 assert (err == 0);
51
52 err = pthread_cond_init (&cond, &attr);
53 if (err)
54 error (1, err, "pthread_cond_init");
55
56 err = pthread_condattr_destroy (&attr);
57 if (err)
58 error (1, err, "pthread_condattr_destroy");
59
60 gettimeofday (&before, 0);
61 ts.tv_sec = before.tv_sec + 1;
62 ts.tv_nsec = before.tv_usec * 1000;
63
64 printf ("Starting wait @ %d\n", (int) before.tv_sec);
65
66 pthread_mutex_lock (&m);
67 err = pthread_cond_timedwait (&cond, &m, &ts);
68
69 gettimeofday (&after, 0);
70
71 printf ("End wait @ %d (err = %d)\n", (int) after.tv_sec, err);
72
73 assert (err == ETIMEDOUT);
74
75 diff = after.tv_sec * 1000000 + after.tv_usec
76 - before.tv_sec * 1000000 - before.tv_usec;
77
78 if (diff < 900000 || diff > 1100000)
79 error (1, EGRATUITOUS, "pthread_cond_timedwait waited %d us", diff);
80
81 return 0;
82 }
83