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
81
82
|
/* Test condition attributes and pthread_cond_timedwait.
Copyright (C) 2000-2020 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/>. */
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
#include <assert.h>
#include <error.h>
#include <errno.h>
#include <sys/time.h>
int
main (int argc, char **argv)
{
error_t err;
int i;
pthread_condattr_t attr;
pthread_cond_t cond;
struct timespec ts;
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
struct timeval before, after;
int diff;
err = pthread_condattr_init (&attr);
if (err)
error (1, err, "pthread_condattr_init");
err = pthread_condattr_getpshared (&attr, &i);
if (err)
error (1, err, "pthread_condattr_getpshared");
assert (i == PTHREAD_PROCESS_PRIVATE);
err = pthread_condattr_setpshared (&attr, PTHREAD_PROCESS_PRIVATE);
assert (err == 0);
err = pthread_cond_init (&cond, &attr);
if (err)
error (1, err, "pthread_cond_init");
err = pthread_condattr_destroy (&attr);
if (err)
error (1, err, "pthread_condattr_destroy");
gettimeofday (&before, 0);
ts.tv_sec = before.tv_sec + 1;
ts.tv_nsec = before.tv_usec * 1000;
printf ("Starting wait @ %d\n", (int) before.tv_sec);
pthread_mutex_lock (&m);
err = pthread_cond_timedwait (&cond, &m, &ts);
gettimeofday (&after, 0);
printf ("End wait @ %d (err = %d)\n", (int) after.tv_sec, err);
assert (err == ETIMEDOUT);
diff = after.tv_sec * 1000000 + after.tv_usec
- before.tv_sec * 1000000 - before.tv_usec;
if (diff < 900000 || diff > 1100000)
error (1, EGRATUITOUS, "pthread_cond_timedwait waited %d us", diff);
return 0;
}
|
GitWeb