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
83
84
85
86
87
88
89
90
91
|
/* Test for sem_post race: bug 14532.
Copyright (C) 2012 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
<http://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#define NTHREADS 10
#define NITER 100000
sem_t sem;
int c;
volatile int thread_fail;
static void *
tf (void *arg)
{
for (int i = 0; i < NITER; i++)
{
if (sem_wait (&sem) != 0)
{
perror ("sem_wait");
thread_fail = 1;
}
++c;
if (sem_post (&sem) != 0)
{
perror ("sem_post");
thread_fail = 1;
}
}
return NULL;
}
static int
do_test (void)
{
if (sem_init (&sem, 0, 0) != 0)
{
perror ("sem_init");
return 1;
}
pthread_t th[NTHREADS];
for (int i = 0; i < NTHREADS; i++)
{
if (pthread_create (&th[i], NULL, tf, NULL) != 0)
{
puts ("pthread_create failed");
return 1;
}
}
if (sem_post (&sem) != 0)
{
perror ("sem_post");
return 1;
}
for (int i = 0; i < NTHREADS; i++)
if (pthread_join (th[i], NULL) != 0)
{
puts ("pthread_join failed");
return 1;
}
if (c != NTHREADS * NITER)
{
printf ("c = %d, should be %d\n", c, NTHREADS * NITER);
return 1;
}
return thread_fail;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
