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26a526fa | 1 | /* Test program for timedout read/write lock functions. |
bfff8b1b | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
26a526fa UD |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2000. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; see the file COPYING.LIB. If |
17 | not, see <http://www.gnu.org/licenses/>. */ | |
26a526fa UD |
18 | |
19 | #include <errno.h> | |
20 | #include <error.h> | |
21 | #include <pthread.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <time.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/time.h> | |
27 | ||
28 | ||
29 | #define NWRITERS 15 | |
30 | #define WRITETRIES 10 | |
31 | #define NREADERS 15 | |
32 | #define READTRIES 15 | |
33 | ||
34 | #define TIMEOUT 1000000 | |
35 | #define DELAY 1000000 | |
36 | ||
cc25c8b4 TR |
37 | #ifndef KIND |
38 | # define KIND PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP | |
d148ed25 UD |
39 | #endif |
40 | ||
cc25c8b4 | 41 | static pthread_rwlock_t lock; |
26a526fa UD |
42 | |
43 | ||
44 | static void * | |
45 | writer_thread (void *nr) | |
46 | { | |
47 | struct timespec ts; | |
48 | struct timespec delay; | |
49 | int n; | |
50 | ||
51 | delay.tv_sec = 0; | |
52 | delay.tv_nsec = DELAY; | |
53 | ||
54 | for (n = 0; n < WRITETRIES; ++n) | |
55 | { | |
56 | int e; | |
57 | do | |
58 | { | |
59 | struct timeval tv; | |
60 | (void) gettimeofday (&tv, NULL); | |
61 | TIMEVAL_TO_TIMESPEC (&tv, &ts); | |
62 | ||
63 | ts.tv_nsec += 2 * TIMEOUT; | |
a2d83cfb UD |
64 | if (ts.tv_nsec >= 1000000000) |
65 | { | |
66 | ts.tv_nsec -= 1000000000; | |
67 | ++ts.tv_sec; | |
68 | } | |
26a526fa UD |
69 | |
70 | printf ("writer thread %ld tries again\n", (long int) nr); | |
71 | ||
72 | e = pthread_rwlock_timedwrlock (&lock, &ts); | |
73 | if (e != 0 && e != ETIMEDOUT) | |
74 | { | |
75 | puts ("timedwrlock failed"); | |
76 | exit (1); | |
77 | } | |
78 | } | |
79 | while (e == ETIMEDOUT); | |
80 | ||
81 | printf ("writer thread %ld succeeded\n", (long int) nr); | |
82 | ||
83 | nanosleep (&delay, NULL); | |
84 | ||
85 | if (pthread_rwlock_unlock (&lock) != 0) | |
86 | { | |
87 | puts ("unlock for writer failed"); | |
88 | exit (1); | |
89 | } | |
90 | ||
91 | printf ("writer thread %ld released\n", (long int) nr); | |
92 | } | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | ||
98 | static void * | |
99 | reader_thread (void *nr) | |
100 | { | |
101 | struct timespec ts; | |
102 | struct timespec delay; | |
103 | int n; | |
104 | ||
105 | delay.tv_sec = 0; | |
106 | delay.tv_nsec = DELAY; | |
107 | ||
108 | for (n = 0; n < READTRIES; ++n) | |
109 | { | |
110 | int e; | |
111 | do | |
112 | { | |
113 | struct timeval tv; | |
114 | (void) gettimeofday (&tv, NULL); | |
115 | TIMEVAL_TO_TIMESPEC (&tv, &ts); | |
116 | ||
117 | ts.tv_nsec += TIMEOUT; | |
a2d83cfb UD |
118 | if (ts.tv_nsec >= 1000000000) |
119 | { | |
120 | ts.tv_nsec -= 1000000000; | |
121 | ++ts.tv_sec; | |
122 | } | |
26a526fa UD |
123 | |
124 | printf ("reader thread %ld tries again\n", (long int) nr); | |
125 | ||
126 | e = pthread_rwlock_timedrdlock (&lock, &ts); | |
127 | if (e != 0 && e != ETIMEDOUT) | |
128 | { | |
129 | puts ("timedrdlock failed"); | |
130 | exit (1); | |
131 | } | |
132 | } | |
133 | while (e == ETIMEDOUT); | |
134 | ||
135 | printf ("reader thread %ld succeeded\n", (long int) nr); | |
136 | ||
137 | nanosleep (&delay, NULL); | |
138 | ||
139 | if (pthread_rwlock_unlock (&lock) != 0) | |
140 | { | |
141 | puts ("unlock for reader failed"); | |
142 | exit (1); | |
143 | } | |
144 | ||
145 | printf ("reader thread %ld released\n", (long int) nr); | |
146 | } | |
147 | ||
148 | return NULL; | |
149 | } | |
150 | ||
151 | ||
152 | static int | |
153 | do_test (void) | |
154 | { | |
155 | pthread_t thwr[NWRITERS]; | |
156 | pthread_t thrd[NREADERS]; | |
157 | int n; | |
158 | void *res; | |
cc25c8b4 TR |
159 | pthread_rwlockattr_t a; |
160 | ||
161 | if (pthread_rwlockattr_init (&a) != 0) | |
162 | { | |
163 | puts ("rwlockattr_t failed"); | |
164 | exit (1); | |
165 | } | |
166 | ||
167 | if (pthread_rwlockattr_setkind_np (&a, KIND) != 0) | |
168 | { | |
169 | puts ("rwlockattr_setkind failed"); | |
170 | exit (1); | |
171 | } | |
172 | ||
173 | if (pthread_rwlock_init (&lock, &a) != 0) | |
174 | { | |
175 | puts ("rwlock_init failed"); | |
176 | exit (1); | |
177 | } | |
26a526fa UD |
178 | |
179 | /* Make standard error the same as standard output. */ | |
180 | dup2 (1, 2); | |
181 | ||
182 | /* Make sure we see all message, even those on stdout. */ | |
183 | setvbuf (stdout, NULL, _IONBF, 0); | |
184 | ||
185 | for (n = 0; n < NWRITERS; ++n) | |
186 | if (pthread_create (&thwr[n], NULL, writer_thread, | |
187 | (void *) (long int) n) != 0) | |
188 | { | |
189 | puts ("writer create failed"); | |
190 | exit (1); | |
191 | } | |
192 | ||
193 | for (n = 0; n < NREADERS; ++n) | |
194 | if (pthread_create (&thrd[n], NULL, reader_thread, | |
195 | (void *) (long int) n) != 0) | |
196 | { | |
197 | puts ("reader create failed"); | |
198 | exit (1); | |
199 | } | |
200 | ||
201 | /* Wait for all the threads. */ | |
202 | for (n = 0; n < NWRITERS; ++n) | |
203 | if (pthread_join (thwr[n], &res) != 0) | |
204 | { | |
205 | puts ("writer join failed"); | |
206 | exit (1); | |
207 | } | |
208 | for (n = 0; n < NREADERS; ++n) | |
209 | if (pthread_join (thrd[n], &res) != 0) | |
210 | { | |
211 | puts ("reader join failed"); | |
212 | exit (1); | |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | #undef TIMEOUT | |
219 | #define TIMEOUT 30 | |
220 | #define TEST_FUNCTION do_test () | |
221 | #include "../test-skeleton.c" |