61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* Test pthread_mutex_timedlock.
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Copyright (C) 2000-2018 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://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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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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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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/* A default mutex shall dead lock if locked twice. As such we do
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not need spawn a second thread. */
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err = pthread_mutex_timedlock (&m, &ts);
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assert (err == ETIMEDOUT);
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gettimeofday (&after, 0);
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printf ("End wait @ %d\n", (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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