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26a526fa | 1 | /* Test program for timedout read/write lock functions. |
d614a753 | 2 | Copyright (C) 2000-2020 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 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://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> | |
495514ee MC |
27 | #include <support/check.h> |
28 | #include <support/timespec.h> | |
e996fa72 | 29 | #include <support/xthread.h> |
26a526fa UD |
30 | |
31 | ||
32 | #define NWRITERS 15 | |
33 | #define WRITETRIES 10 | |
34 | #define NREADERS 15 | |
35 | #define READTRIES 15 | |
36 | ||
495514ee MC |
37 | static const struct timespec timeout = { 0,1000000 }; |
38 | static const struct timespec delay = { 0, 1000000 }; | |
26a526fa | 39 | |
cc25c8b4 TR |
40 | #ifndef KIND |
41 | # define KIND PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP | |
d148ed25 UD |
42 | #endif |
43 | ||
e996fa72 MC |
44 | /* A bogus clock value that tells the tests to use pthread_rwlock_timedrdlock |
45 | and pthread_rwlock_timedwrlock rather than pthread_rwlock_clockrdlock and | |
46 | pthread_rwlock_clockwrlock. */ | |
47 | #define CLOCK_USE_TIMEDLOCK (-1) | |
48 | ||
cc25c8b4 | 49 | static pthread_rwlock_t lock; |
26a526fa | 50 | |
e996fa72 MC |
51 | struct thread_args |
52 | { | |
53 | int nr; | |
54 | clockid_t clockid; | |
55 | const char *fnname; | |
56 | }; | |
26a526fa UD |
57 | |
58 | static void * | |
e996fa72 | 59 | writer_thread (void *arg) |
26a526fa | 60 | { |
e996fa72 MC |
61 | struct thread_args *args = arg; |
62 | const int nr = args->nr; | |
63 | const clockid_t clockid = args->clockid; | |
64 | const clockid_t clockid_for_get = | |
65 | (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid; | |
66 | const char *fnname = args->fnname; | |
67 | ||
26a526fa | 68 | struct timespec ts; |
26a526fa UD |
69 | int n; |
70 | ||
26a526fa UD |
71 | for (n = 0; n < WRITETRIES; ++n) |
72 | { | |
73 | int e; | |
74 | do | |
75 | { | |
e996fa72 | 76 | xclock_gettime (clockid_for_get, &ts); |
26a526fa | 77 | |
495514ee MC |
78 | ts = timespec_add (ts, timeout); |
79 | ts = timespec_add (ts, timeout); | |
26a526fa | 80 | |
e996fa72 | 81 | printf ("writer thread %d tries again\n", nr); |
26a526fa | 82 | |
e996fa72 MC |
83 | e = (clockid == CLOCK_USE_TIMEDLOCK) |
84 | ? pthread_rwlock_timedwrlock (&lock, &ts) | |
85 | : pthread_rwlock_clockwrlock (&lock, clockid, &ts); | |
26a526fa | 86 | if (e != 0 && e != ETIMEDOUT) |
e996fa72 | 87 | FAIL_EXIT1 ("%swrlock failed", fnname); |
26a526fa UD |
88 | } |
89 | while (e == ETIMEDOUT); | |
90 | ||
e996fa72 | 91 | printf ("writer thread %d succeeded\n", nr); |
26a526fa UD |
92 | |
93 | nanosleep (&delay, NULL); | |
94 | ||
95 | if (pthread_rwlock_unlock (&lock) != 0) | |
495514ee | 96 | FAIL_EXIT1 ("unlock for writer failed"); |
26a526fa | 97 | |
e996fa72 | 98 | printf ("writer thread %d released\n", nr); |
26a526fa UD |
99 | } |
100 | ||
101 | return NULL; | |
102 | } | |
103 | ||
104 | ||
105 | static void * | |
e996fa72 | 106 | reader_thread (void *arg) |
26a526fa | 107 | { |
e996fa72 MC |
108 | struct thread_args *args = arg; |
109 | const int nr = args->nr; | |
110 | const clockid_t clockid = args->clockid; | |
111 | const clockid_t clockid_for_get = | |
112 | (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid; | |
113 | const char *fnname = args->fnname; | |
114 | ||
26a526fa | 115 | struct timespec ts; |
26a526fa UD |
116 | int n; |
117 | ||
26a526fa UD |
118 | for (n = 0; n < READTRIES; ++n) |
119 | { | |
120 | int e; | |
121 | do | |
122 | { | |
e996fa72 | 123 | xclock_gettime (clockid_for_get, &ts); |
26a526fa | 124 | |
495514ee | 125 | ts = timespec_add (ts, timeout); |
26a526fa | 126 | |
e996fa72 | 127 | printf ("reader thread %d tries again\n", nr); |
26a526fa | 128 | |
e996fa72 MC |
129 | if (clockid == CLOCK_USE_TIMEDLOCK) |
130 | e = pthread_rwlock_timedrdlock (&lock, &ts); | |
131 | else | |
132 | e = pthread_rwlock_clockrdlock (&lock, clockid, &ts); | |
26a526fa | 133 | if (e != 0 && e != ETIMEDOUT) |
e996fa72 | 134 | FAIL_EXIT1 ("%srdlock failed", fnname); |
26a526fa UD |
135 | } |
136 | while (e == ETIMEDOUT); | |
137 | ||
e996fa72 | 138 | printf ("reader thread %d succeeded\n", nr); |
26a526fa UD |
139 | |
140 | nanosleep (&delay, NULL); | |
141 | ||
142 | if (pthread_rwlock_unlock (&lock) != 0) | |
495514ee | 143 | FAIL_EXIT1 ("unlock for reader failed"); |
26a526fa | 144 | |
e996fa72 | 145 | printf ("reader thread %d released\n", nr); |
26a526fa UD |
146 | } |
147 | ||
148 | return NULL; | |
149 | } | |
150 | ||
151 | ||
152 | static int | |
e996fa72 | 153 | do_test_clock (clockid_t clockid, const char *fnname) |
26a526fa UD |
154 | { |
155 | pthread_t thwr[NWRITERS]; | |
156 | pthread_t thrd[NREADERS]; | |
157 | int n; | |
cc25c8b4 TR |
158 | pthread_rwlockattr_t a; |
159 | ||
160 | if (pthread_rwlockattr_init (&a) != 0) | |
495514ee | 161 | FAIL_EXIT1 ("rwlockattr_t failed"); |
cc25c8b4 TR |
162 | |
163 | if (pthread_rwlockattr_setkind_np (&a, KIND) != 0) | |
495514ee | 164 | FAIL_EXIT1 ("rwlockattr_setkind failed"); |
cc25c8b4 TR |
165 | |
166 | if (pthread_rwlock_init (&lock, &a) != 0) | |
495514ee | 167 | FAIL_EXIT1 ("rwlock_init failed"); |
26a526fa UD |
168 | |
169 | /* Make standard error the same as standard output. */ | |
170 | dup2 (1, 2); | |
171 | ||
172 | /* Make sure we see all message, even those on stdout. */ | |
173 | setvbuf (stdout, NULL, _IONBF, 0); | |
174 | ||
e996fa72 MC |
175 | struct thread_args wargs[NWRITERS]; |
176 | for (n = 0; n < NWRITERS; ++n) { | |
177 | wargs[n].nr = n; | |
178 | wargs[n].clockid = clockid; | |
179 | wargs[n].fnname = fnname; | |
180 | thwr[n] = xpthread_create (NULL, writer_thread, &wargs[n]); | |
181 | } | |
182 | ||
183 | struct thread_args rargs[NREADERS]; | |
184 | for (n = 0; n < NREADERS; ++n) { | |
185 | rargs[n].nr = n; | |
186 | rargs[n].clockid = clockid; | |
187 | rargs[n].fnname = fnname; | |
188 | thrd[n] = xpthread_create (NULL, reader_thread, &rargs[n]); | |
189 | } | |
26a526fa UD |
190 | |
191 | /* Wait for all the threads. */ | |
192 | for (n = 0; n < NWRITERS; ++n) | |
e996fa72 | 193 | xpthread_join (thwr[n]); |
26a526fa | 194 | for (n = 0; n < NREADERS; ++n) |
e996fa72 MC |
195 | xpthread_join (thrd[n]); |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | static int | |
201 | do_test (void) | |
202 | { | |
203 | do_test_clock (CLOCK_USE_TIMEDLOCK, "timed"); | |
204 | do_test_clock (CLOCK_REALTIME, "clock(realtime)"); | |
205 | do_test_clock (CLOCK_MONOTONIC, "clock(monotonic)"); | |
26a526fa UD |
206 | |
207 | return 0; | |
208 | } | |
209 | ||
26a526fa | 210 | #define TIMEOUT 30 |
495514ee | 211 | #include <support/test-driver.c> |