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3724f268 | 1 | /* Test program for timedout read/write lock functions. |
bfff8b1b | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
3724f268 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/>. */ | |
3724f268 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 | ||
27 | ||
28 | #define NWRITERS 15 | |
29 | #define WRITETRIES 10 | |
30 | #define NREADERS 15 | |
31 | #define READTRIES 15 | |
32 | ||
33 | #define DELAY 1000000 | |
34 | ||
cc25c8b4 TR |
35 | #ifndef KIND |
36 | # define KIND PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP | |
d148ed25 UD |
37 | #endif |
38 | ||
cc25c8b4 | 39 | static pthread_rwlock_t lock; |
3724f268 UD |
40 | |
41 | ||
42 | static void * | |
43 | writer_thread (void *nr) | |
44 | { | |
45 | struct timespec delay; | |
46 | int n; | |
47 | ||
48 | delay.tv_sec = 0; | |
49 | delay.tv_nsec = DELAY; | |
50 | ||
51 | for (n = 0; n < WRITETRIES; ++n) | |
52 | { | |
53 | printf ("writer thread %ld tries again\n", (long int) nr); | |
54 | ||
55 | if (pthread_rwlock_wrlock (&lock) != 0) | |
56 | { | |
57 | puts ("wrlock failed"); | |
58 | exit (1); | |
59 | } | |
60 | ||
61 | printf ("writer thread %ld succeeded\n", (long int) nr); | |
62 | ||
63 | nanosleep (&delay, NULL); | |
64 | ||
65 | if (pthread_rwlock_unlock (&lock) != 0) | |
66 | { | |
67 | puts ("unlock for writer failed"); | |
68 | exit (1); | |
69 | } | |
70 | ||
71 | printf ("writer thread %ld released\n", (long int) nr); | |
72 | } | |
73 | ||
74 | return NULL; | |
75 | } | |
76 | ||
77 | ||
78 | static void * | |
79 | reader_thread (void *nr) | |
80 | { | |
3724f268 UD |
81 | struct timespec delay; |
82 | int n; | |
83 | ||
84 | delay.tv_sec = 0; | |
85 | delay.tv_nsec = DELAY; | |
86 | ||
87 | for (n = 0; n < READTRIES; ++n) | |
88 | { | |
89 | printf ("reader thread %ld tries again\n", (long int) nr); | |
90 | ||
91 | if (pthread_rwlock_rdlock (&lock) != 0) | |
92 | { | |
93 | puts ("rdlock failed"); | |
94 | exit (1); | |
95 | } | |
96 | ||
97 | printf ("reader thread %ld succeeded\n", (long int) nr); | |
98 | ||
99 | nanosleep (&delay, NULL); | |
100 | ||
101 | if (pthread_rwlock_unlock (&lock) != 0) | |
102 | { | |
103 | puts ("unlock for reader failed"); | |
104 | exit (1); | |
105 | } | |
106 | ||
107 | printf ("reader thread %ld released\n", (long int) nr); | |
108 | } | |
109 | ||
110 | return NULL; | |
111 | } | |
112 | ||
113 | ||
114 | static int | |
115 | do_test (void) | |
116 | { | |
117 | pthread_t thwr[NWRITERS]; | |
118 | pthread_t thrd[NREADERS]; | |
119 | int n; | |
120 | void *res; | |
cc25c8b4 TR |
121 | pthread_rwlockattr_t a; |
122 | ||
123 | if (pthread_rwlockattr_init (&a) != 0) | |
124 | { | |
125 | puts ("rwlockattr_t failed"); | |
126 | exit (1); | |
127 | } | |
128 | ||
129 | if (pthread_rwlockattr_setkind_np (&a, KIND) != 0) | |
130 | { | |
131 | puts ("rwlockattr_setkind failed"); | |
132 | exit (1); | |
133 | } | |
134 | ||
135 | if (pthread_rwlock_init (&lock, &a) != 0) | |
136 | { | |
137 | puts ("rwlock_init failed"); | |
138 | exit (1); | |
139 | } | |
3724f268 UD |
140 | |
141 | /* Make standard error the same as standard output. */ | |
142 | dup2 (1, 2); | |
143 | ||
144 | /* Make sure we see all message, even those on stdout. */ | |
145 | setvbuf (stdout, NULL, _IONBF, 0); | |
146 | ||
147 | for (n = 0; n < NWRITERS; ++n) | |
148 | if (pthread_create (&thwr[n], NULL, writer_thread, | |
149 | (void *) (long int) n) != 0) | |
150 | { | |
151 | puts ("writer create failed"); | |
152 | exit (1); | |
153 | } | |
154 | ||
155 | for (n = 0; n < NREADERS; ++n) | |
156 | if (pthread_create (&thrd[n], NULL, reader_thread, | |
157 | (void *) (long int) n) != 0) | |
158 | { | |
159 | puts ("reader create failed"); | |
160 | exit (1); | |
161 | } | |
162 | ||
163 | /* Wait for all the threads. */ | |
164 | for (n = 0; n < NWRITERS; ++n) | |
165 | if (pthread_join (thwr[n], &res) != 0) | |
166 | { | |
167 | puts ("writer join failed"); | |
168 | exit (1); | |
169 | } | |
170 | for (n = 0; n < NREADERS; ++n) | |
171 | if (pthread_join (thrd[n], &res) != 0) | |
172 | { | |
173 | puts ("reader join failed"); | |
174 | exit (1); | |
175 | } | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | #define TIMEOUT 30 | |
181 | #define TEST_FUNCTION do_test () | |
182 | #include "../test-skeleton.c" |