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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <time.h>
#include <unistd.h>
static pthread_once_t once = PTHREAD_ONCE_INIT;
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
static pthread_barrier_t bar;
static int global;
static int cl_called;
static void
once_handler1 (void)
{
if (pthread_mutex_lock (&mut) != 0)
{
puts ("once_handler1: mutex_lock failed");
exit (1);
}
int r = pthread_barrier_wait (&bar);
if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("once_handler1: barrier_wait failed");
exit (1);
}
pthread_cond_wait (&cond, &mut);
/* We should never get here. */
}
static void
once_handler2 (void)
{
global = 1;
}
static void
cl (void *arg)
{
++cl_called;
}
static void *
tf1 (void *arg)
{
pthread_cleanup_push (cl, NULL);
pthread_once (&once, once_handler1);
pthread_cleanup_pop (0);
/* We should never get here. */
puts ("pthread_once in tf returned");
exit (1);
}
static void *
tf2 (void *arg)
{
pthread_cleanup_push (cl, NULL);
int r = pthread_barrier_wait (&bar);
if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("once_handler2: barrier_wait failed");
exit (1);
}
pthread_cleanup_pop (0);
pthread_once (&once, once_handler2);
return NULL;
}
static int
do_test (void)
{
pthread_t th[2];
if (pthread_barrier_init (&bar, NULL, 2) != 0)
{
puts ("barrier_init failed");
return 1;
}
if (pthread_create (&th[0], NULL, tf1, NULL) != 0)
{
puts ("first create failed");
return 1;
}
int r = pthread_barrier_wait (&bar);
if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("first barrier_wait failed");
return 1;
}
if (pthread_mutex_lock (&mut) != 0)
{
puts ("mutex_lock failed");
return 1;
}
/* We unlock the mutex so that we catch the case where the pthread_cond_wait
call incorrectly resumes and tries to get the mutex. */
if (pthread_mutex_unlock (&mut) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
if (pthread_create (&th[1], NULL, tf2, NULL) != 0)
{
puts ("second create failed");
return 1;
}
r = pthread_barrier_wait (&bar);
if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("second barrier_wait failed");
return 1;
}
/* Give the second thread a chance to reach the pthread_once call. */
sleep (2);
/* Cancel the thread. */
if (pthread_cancel (th[0]) != 0)
{
puts ("cancel failed");
return 1;
}
void *result;
pthread_join (th[0], &result);
if (result != PTHREAD_CANCELED)
{
puts ("first join didn't return PTHREAD_CANCELED");
return 1;
}
puts ("joined first thread");
pthread_join (th[1], &result);
if (result != NULL)
{
puts ("second join didn't return PTHREAD_CANCELED");
return 1;
}
if (global != 1)
{
puts ("global still 0");
return 1;
}
if (cl_called != 1)
{
printf ("cl_called = %d\n", cl_called);
return 1;
}
return 0;
}
#define TEST_FUNCTION do_test ()
#define TIMEOUT 4
#include "../test-skeleton.c"
|
