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1 | /* Test program for timedout read/write lock functions. | |
2 | Copyright (C) 2000, 2003 Free Software Foundation, Inc. | |
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 | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <error.h> | |
22 | #include <pthread.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <time.h> | |
26 | #include <unistd.h> | |
27 | #include <sys/time.h> | |
28 | ||
29 | ||
30 | #define NWRITERS 15 | |
31 | #define WRITETRIES 10 | |
32 | #define NREADERS 15 | |
33 | #define READTRIES 15 | |
34 | ||
35 | #define TIMEOUT 1000000 | |
36 | #define DELAY 1000000 | |
37 | ||
38 | #ifndef INIT | |
39 | # define INIT PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP | |
40 | #endif | |
41 | ||
42 | static pthread_rwlock_t lock = INIT; | |
43 | ||
44 | ||
45 | static void * | |
46 | writer_thread (void *nr) | |
47 | { | |
48 | struct timespec ts; | |
49 | struct timespec delay; | |
50 | int n; | |
51 | ||
52 | delay.tv_sec = 0; | |
53 | delay.tv_nsec = DELAY; | |
54 | ||
55 | for (n = 0; n < WRITETRIES; ++n) | |
56 | { | |
57 | int e; | |
58 | do | |
59 | { | |
60 | struct timeval tv; | |
61 | (void) gettimeofday (&tv, NULL); | |
62 | TIMEVAL_TO_TIMESPEC (&tv, &ts); | |
63 | ||
64 | ts.tv_nsec += 2 * TIMEOUT; | |
65 | if (ts.tv_nsec >= 1000000000) | |
66 | { | |
67 | ts.tv_nsec -= 1000000000; | |
68 | ++ts.tv_sec; | |
69 | } | |
70 | ||
71 | printf ("writer thread %ld tries again\n", (long int) nr); | |
72 | ||
73 | e = pthread_rwlock_timedwrlock (&lock, &ts); | |
74 | if (e != 0 && e != ETIMEDOUT) | |
75 | { | |
76 | puts ("timedwrlock failed"); | |
77 | exit (1); | |
78 | } | |
79 | } | |
80 | while (e == ETIMEDOUT); | |
81 | ||
82 | printf ("writer thread %ld succeeded\n", (long int) nr); | |
83 | ||
84 | nanosleep (&delay, NULL); | |
85 | ||
86 | if (pthread_rwlock_unlock (&lock) != 0) | |
87 | { | |
88 | puts ("unlock for writer failed"); | |
89 | exit (1); | |
90 | } | |
91 | ||
92 | printf ("writer thread %ld released\n", (long int) nr); | |
93 | } | |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
98 | ||
99 | static void * | |
100 | reader_thread (void *nr) | |
101 | { | |
102 | struct timespec ts; | |
103 | struct timespec delay; | |
104 | int n; | |
105 | ||
106 | delay.tv_sec = 0; | |
107 | delay.tv_nsec = DELAY; | |
108 | ||
109 | for (n = 0; n < READTRIES; ++n) | |
110 | { | |
111 | int e; | |
112 | do | |
113 | { | |
114 | struct timeval tv; | |
115 | (void) gettimeofday (&tv, NULL); | |
116 | TIMEVAL_TO_TIMESPEC (&tv, &ts); | |
117 | ||
118 | ts.tv_nsec += TIMEOUT; | |
119 | if (ts.tv_nsec >= 1000000000) | |
120 | { | |
121 | ts.tv_nsec -= 1000000000; | |
122 | ++ts.tv_sec; | |
123 | } | |
124 | ||
125 | printf ("reader thread %ld tries again\n", (long int) nr); | |
126 | ||
127 | e = pthread_rwlock_timedrdlock (&lock, &ts); | |
128 | if (e != 0 && e != ETIMEDOUT) | |
129 | { | |
130 | puts ("timedrdlock failed"); | |
131 | exit (1); | |
132 | } | |
133 | } | |
134 | while (e == ETIMEDOUT); | |
135 | ||
136 | printf ("reader thread %ld succeeded\n", (long int) nr); | |
137 | ||
138 | nanosleep (&delay, NULL); | |
139 | ||
140 | if (pthread_rwlock_unlock (&lock) != 0) | |
141 | { | |
142 | puts ("unlock for reader failed"); | |
143 | exit (1); | |
144 | } | |
145 | ||
146 | printf ("reader thread %ld released\n", (long int) nr); | |
147 | } | |
148 | ||
149 | return NULL; | |
150 | } | |
151 | ||
152 | ||
153 | static int | |
154 | do_test (void) | |
155 | { | |
156 | pthread_t thwr[NWRITERS]; | |
157 | pthread_t thrd[NREADERS]; | |
158 | int n; | |
159 | void *res; | |
160 | ||
161 | /* Make standard error the same as standard output. */ | |
162 | dup2 (1, 2); | |
163 | ||
164 | /* Make sure we see all message, even those on stdout. */ | |
165 | setvbuf (stdout, NULL, _IONBF, 0); | |
166 | ||
167 | for (n = 0; n < NWRITERS; ++n) | |
168 | if (pthread_create (&thwr[n], NULL, writer_thread, | |
169 | (void *) (long int) n) != 0) | |
170 | { | |
171 | puts ("writer create failed"); | |
172 | exit (1); | |
173 | } | |
174 | ||
175 | for (n = 0; n < NREADERS; ++n) | |
176 | if (pthread_create (&thrd[n], NULL, reader_thread, | |
177 | (void *) (long int) n) != 0) | |
178 | { | |
179 | puts ("reader create failed"); | |
180 | exit (1); | |
181 | } | |
182 | ||
183 | /* Wait for all the threads. */ | |
184 | for (n = 0; n < NWRITERS; ++n) | |
185 | if (pthread_join (thwr[n], &res) != 0) | |
186 | { | |
187 | puts ("writer join failed"); | |
188 | exit (1); | |
189 | } | |
190 | for (n = 0; n < NREADERS; ++n) | |
191 | if (pthread_join (thrd[n], &res) != 0) | |
192 | { | |
193 | puts ("reader join failed"); | |
194 | exit (1); | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | #undef TIMEOUT | |
201 | #define TIMEOUT 30 | |
202 | #define TEST_FUNCTION do_test () | |
203 | #include "../test-skeleton.c" |