103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
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/* Test pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock.
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Copyright (C) 2000-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE
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#include <pthread.h>
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#include <stdio.h>
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#include <assert.h>
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#include <error.h>
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#include <errno.h>
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#include <sys/time.h>
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#define THREADS 10
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pthread_rwlock_t rwlock;
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void *
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test (void *arg)
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{
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error_t err;
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int foo = (int) arg;
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struct timespec ts;
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struct timeval before, after;
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int diff;
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gettimeofday (&before, 0);
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ts.tv_sec = before.tv_sec + 1;
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ts.tv_nsec = before.tv_usec * 1000;
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printf ("Thread %d starting wait @ %d\n", pthread_self (),
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(int) before.tv_sec);
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if (foo % 2 == 0)
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err = pthread_rwlock_timedrdlock (&rwlock, &ts);
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else
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err = pthread_rwlock_timedwrlock (&rwlock, &ts);
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assert (err == ETIMEDOUT);
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gettimeofday (&after, 0);
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printf ("Thread %d ending wait @ %d\n", pthread_self (), (int) after.tv_sec);
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diff = after.tv_sec * 1000000 + after.tv_usec
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- before.tv_sec * 1000000 - before.tv_usec;
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if (diff < 900000 || diff > 1100000)
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error (1, EGRATUITOUS, "pthread_mutex_timedlock waited %d us", diff);
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return 0;
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}
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int
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main (int argc, char **argv)
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{
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error_t err;
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int i;
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pthread_t tid[THREADS];
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err = pthread_rwlock_init (&rwlock, 0);
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if (err)
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error (1, err, "pthread_rwlock_init");
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/* Lock it so all the threads will block. */
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err = pthread_rwlock_wrlock (&rwlock);
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assert (err == 0);
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for (i = 0; i < THREADS; i++)
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{
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err = pthread_create (&tid[i], 0, test, (void *) i);
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if (err)
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error (1, err, "pthread_create");
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}
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for (i = 0; i < THREADS; i++)
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{
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void *ret;
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err = pthread_join (tid[i], &ret);
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if (err)
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error (1, err, "pthread_join");
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assert (ret == 0);
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}
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return 0;
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}
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