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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* 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 <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
static int kind[] =
{
PTHREAD_RWLOCK_PREFER_READER_NP,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
PTHREAD_RWLOCK_PREFER_WRITER_NP,
};
static void *
tf (void *arg)
{
pthread_rwlock_t *r = arg;
/* Timeout: 0.3 secs. */
struct timeval tv;
(void) gettimeofday (&tv, NULL);
struct timespec ts;
TIMEVAL_TO_TIMESPEC (&tv, &ts);
ts.tv_nsec += 300000000;
if (ts.tv_nsec >= 1000000000)
{
ts.tv_nsec -= 1000000000;
++ts.tv_sec;
}
puts ("child calling timedrdlock");
int err = pthread_rwlock_timedrdlock (r, &ts);
if (err == 0)
{
puts ("rwlock_timedrdlock returned");
pthread_exit ((void *) 1l);
}
if (err != ETIMEDOUT)
{
printf ("err = %s (%d), expected %s (%d)\n",
strerror (err), err, strerror (ETIMEDOUT), ETIMEDOUT);
pthread_exit ((void *) 1l);
}
puts ("1st child timedrdlock done");
struct timeval tv2;
(void) gettimeofday (&tv2, NULL);
timersub (&tv2, &tv, &tv);
if (tv.tv_usec < 200000)
{
puts ("timeout too short");
pthread_exit ((void *) 1l);
}
(void) gettimeofday (&tv, NULL);
TIMEVAL_TO_TIMESPEC (&tv, &ts);
ts.tv_sec += 10;
/* Note that the following operation makes ts invalid. */
ts.tv_nsec += 1000000000;
err = pthread_rwlock_timedrdlock (r, &ts);
if (err == 0)
{
puts ("2nd timedrdlock succeeded");
pthread_exit ((void *) 1l);
}
if (err != EINVAL)
{
puts ("2nd timedrdlock did not return EINVAL");
pthread_exit ((void *) 1l);
}
puts ("2nd child timedrdlock done");
return NULL;
}
static int
do_test (void)
{
size_t cnt;
for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
{
pthread_rwlock_t r;
pthread_rwlockattr_t a;
if (pthread_rwlockattr_init (&a) != 0)
{
printf ("round %Zu: rwlockattr_t failed\n", cnt);
exit (1);
}
if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
{
printf ("round %Zu: rwlockattr_setkind failed\n", cnt);
exit (1);
}
if (pthread_rwlock_init (&r, &a) != 0)
{
printf ("round %Zu: rwlock_init failed\n", cnt);
exit (1);
}
if (pthread_rwlockattr_destroy (&a) != 0)
{
printf ("round %Zu: rwlockattr_destroy failed\n", cnt);
exit (1);
}
struct timeval tv;
(void) gettimeofday (&tv, NULL);
struct timespec ts;
TIMEVAL_TO_TIMESPEC (&tv, &ts);
++ts.tv_sec;
/* Get a write lock. */
int e = pthread_rwlock_timedwrlock (&r, &ts);
if (e != 0)
{
printf ("round %Zu: rwlock_timedwrlock failed (%d)\n", cnt, e);
exit (1);
}
puts ("1st timedwrlock done");
(void) gettimeofday (&tv, NULL);
TIMEVAL_TO_TIMESPEC (&tv, &ts);
++ts.tv_sec;
e = pthread_rwlock_timedrdlock (&r, &ts);
if (e == 0)
{
puts ("timedrdlock succeeded");
exit (1);
}
if (e != EDEADLK)
{
puts ("timedrdlock did not return EDEADLK");
exit (1);
}
puts ("1st timedrdlock done");
(void) gettimeofday (&tv, NULL);
TIMEVAL_TO_TIMESPEC (&tv, &ts);
++ts.tv_sec;
e = pthread_rwlock_timedwrlock (&r, &ts);
if (e == 0)
{
puts ("2nd timedwrlock succeeded");
exit (1);
}
if (e != EDEADLK)
{
puts ("2nd timedwrlock did not return EDEADLK");
exit (1);
}
puts ("2nd timedwrlock done");
pthread_t th;
if (pthread_create (&th, NULL, tf, &r) != 0)
{
printf ("round %Zu: create failed\n", cnt);
exit (1);
}
puts ("started thread");
void *status;
if (pthread_join (th, &status) != 0)
{
printf ("round %Zu: join failed\n", cnt);
exit (1);
}
if (status != NULL)
{
printf ("failure in round %Zu\n", cnt);
exit (1);
}
puts ("joined thread");
if (pthread_rwlock_destroy (&r) != 0)
{
printf ("round %Zu: rwlock_destroy failed\n", cnt);
exit (1);
}
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
