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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
/* Note that this test requires more than the standard. It is
required that there are no spurious wakeups if only more readers
are added. This is a reasonable demand. */
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
#define N 10
static void *
tf (void *arg)
{
int i = (long int) arg;
int err;
/* Get the mutex. */
err = pthread_mutex_lock (&mut);
if (err != 0)
{
printf ("child %d mutex_lock failed: %s\n", i, strerror (err));
exit (1);
}
/* This call should never return. */
xpthread_cond_wait (&cond, &mut);
puts ("error: pthread_cond_wait in tf returned");
/* We should never get here. */
exit (1);
return NULL;
}
static int
do_test (void)
{
int err;
int i;
for (i = 0; i < N; ++i)
{
pthread_t th;
if (i != 0)
{
/* Release the mutex. */
err = pthread_mutex_unlock (&mut);
if (err != 0)
{
printf ("mutex_unlock %d failed: %s\n", i, strerror (err));
return 1;
}
}
err = pthread_create (&th, NULL, tf, (void *) (long int) i);
if (err != 0)
{
printf ("create %d failed: %s\n", i, strerror (err));
return 1;
}
/* Get the mutex. */
err = pthread_mutex_lock (&mut);
if (err != 0)
{
printf ("mutex_lock %d failed: %s\n", i, strerror (err));
return 1;
}
}
delayed_exit (1);
/* This call should never return. */
xpthread_cond_wait (&cond, &mut);
puts ("error: pthread_cond_wait in do_test returned");
return 1;
}
|
