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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/* Copyright (C) 2003-2025 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/>. */
#include <errno.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
typedef struct
{
pthread_cond_t cond;
pthread_mutex_t lock;
pthread_t h;
} T;
static volatile bool done;
static void *
tf (void *arg)
{
puts ("child created");
if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL) != 0
|| pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, NULL) != 0)
{
puts ("cannot set cancellation options");
exit (1);
}
T *t = (T *) arg;
if (pthread_mutex_lock (&t->lock) != 0)
{
puts ("child: lock failed");
exit (1);
}
done = true;
if (pthread_cond_signal (&t->cond) != 0)
{
puts ("child: cond_signal failed");
exit (1);
}
if (pthread_cond_wait (&t->cond, &t->lock) != 0)
{
puts ("child: cond_wait failed");
exit (1);
}
if (pthread_mutex_unlock (&t->lock) != 0)
{
puts ("child: unlock failed");
exit (1);
}
return NULL;
}
static int
do_test (void)
{
int i;
#define N 100
T *t[N];
for (i = 0; i < N; ++i)
{
printf ("round %d\n", i);
t[i] = (T *) malloc (sizeof (T));
if (t[i] == NULL)
{
puts ("out of memory");
exit (1);
}
if (pthread_mutex_init (&t[i]->lock, NULL) != 0
|| pthread_cond_init (&t[i]->cond, NULL) != 0)
{
puts ("an _init function failed");
exit (1);
}
if (pthread_mutex_lock (&t[i]->lock) != 0)
{
puts ("initial mutex_lock failed");
exit (1);
}
done = false;
if (pthread_create (&t[i]->h, NULL, tf, t[i]) != 0)
{
puts ("pthread_create failed");
exit (1);
}
do
if (pthread_cond_wait (&t[i]->cond, &t[i]->lock) != 0)
{
puts ("cond_wait failed");
exit (1);
}
while (! done);
/* Release the lock since the cancel handler will get it. */
if (pthread_mutex_unlock (&t[i]->lock) != 0)
{
puts ("mutex_unlock failed");
exit (1);
}
if (pthread_cancel (t[i]->h) != 0)
{
puts ("cancel failed");
exit (1);
}
puts ("parent: joining now");
void *result;
if (pthread_join (t[i]->h, &result) != 0)
{
puts ("join failed");
exit (1);
}
if (result != PTHREAD_CANCELED)
{
puts ("result != PTHREAD_CANCELED");
exit (1);
}
}
for (i = 0; i < N; ++i)
free (t[i]);
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
