1 /* Test program for timedout read/write lock functions.
2 Copyright (C) 2000-2014 Free Software Foundation, Inc.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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.
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.
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
17 not, see <http://www.gnu.org/licenses/>. */
34 #define TIMEOUT 1000000
38 # define INIT PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
41 static pthread_rwlock_t lock = INIT;
45 writer_thread (void *nr)
48 struct timespec delay;
52 delay.tv_nsec = DELAY;
54 for (n = 0; n < WRITETRIES; ++n)
60 (void) gettimeofday (&tv, NULL);
61 TIMEVAL_TO_TIMESPEC (&tv, &ts);
63 ts.tv_nsec += 2 * TIMEOUT;
64 if (ts.tv_nsec >= 1000000000)
66 ts.tv_nsec -= 1000000000;
70 printf ("writer thread %ld tries again\n", (long int) nr);
72 e = pthread_rwlock_timedwrlock (&lock, &ts);
73 if (e != 0 && e != ETIMEDOUT)
75 puts ("timedwrlock failed");
79 while (e == ETIMEDOUT);
81 printf ("writer thread %ld succeeded\n", (long int) nr);
83 nanosleep (&delay, NULL);
85 if (pthread_rwlock_unlock (&lock) != 0)
87 puts ("unlock for writer failed");
91 printf ("writer thread %ld released\n", (long int) nr);
99 reader_thread (void *nr)
102 struct timespec delay;
106 delay.tv_nsec = DELAY;
108 for (n = 0; n < READTRIES; ++n)
114 (void) gettimeofday (&tv, NULL);
115 TIMEVAL_TO_TIMESPEC (&tv, &ts);
117 ts.tv_nsec += TIMEOUT;
118 if (ts.tv_nsec >= 1000000000)
120 ts.tv_nsec -= 1000000000;
124 printf ("reader thread %ld tries again\n", (long int) nr);
126 e = pthread_rwlock_timedrdlock (&lock, &ts);
127 if (e != 0 && e != ETIMEDOUT)
129 puts ("timedrdlock failed");
133 while (e == ETIMEDOUT);
135 printf ("reader thread %ld succeeded\n", (long int) nr);
137 nanosleep (&delay, NULL);
139 if (pthread_rwlock_unlock (&lock) != 0)
141 puts ("unlock for reader failed");
145 printf ("reader thread %ld released\n", (long int) nr);
155 pthread_t thwr[NWRITERS];
156 pthread_t thrd[NREADERS];
160 /* Make standard error the same as standard output. */
163 /* Make sure we see all message, even those on stdout. */
164 setvbuf (stdout, NULL, _IONBF, 0);
166 for (n = 0; n < NWRITERS; ++n)
167 if (pthread_create (&thwr[n], NULL, writer_thread,
168 (void *) (long int) n) != 0)
170 puts ("writer create failed");
174 for (n = 0; n < NREADERS; ++n)
175 if (pthread_create (&thrd[n], NULL, reader_thread,
176 (void *) (long int) n) != 0)
178 puts ("reader create failed");
182 /* Wait for all the threads. */
183 for (n = 0; n < NWRITERS; ++n)
184 if (pthread_join (thwr[n], &res) != 0)
186 puts ("writer join failed");
189 for (n = 0; n < NREADERS; ++n)
190 if (pthread_join (thrd[n], &res) != 0)
192 puts ("reader join failed");
201 #define TEST_FUNCTION do_test ()
202 #include "../test-skeleton.c"