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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* Test condition attributes and pthread_cond_timedwait.
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Copyright (C) 2000-2020 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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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_condattr_t attr;
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pthread_cond_t cond;
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struct timespec ts;
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pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
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struct timeval before, after;
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int diff;
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err = pthread_condattr_init (&attr);
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if (err)
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error (1, err, "pthread_condattr_init");
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err = pthread_condattr_getpshared (&attr, &i);
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if (err)
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error (1, err, "pthread_condattr_getpshared");
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assert (i == PTHREAD_PROCESS_PRIVATE);
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err = pthread_condattr_setpshared (&attr, PTHREAD_PROCESS_PRIVATE);
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assert (err == 0);
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err = pthread_cond_init (&cond, &attr);
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if (err)
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error (1, err, "pthread_cond_init");
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err = pthread_condattr_destroy (&attr);
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if (err)
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error (1, err, "pthread_condattr_destroy");
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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 ("Starting wait @ %d\n", (int) before.tv_sec);
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pthread_mutex_lock (&m);
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err = pthread_cond_timedwait (&cond, &m, &ts);
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gettimeofday (&after, 0);
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printf ("End wait @ %d (err = %d)\n", (int) after.tv_sec, err);
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assert (err == ETIMEDOUT);
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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_cond_timedwait waited %d us", diff);
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return 0;
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}
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