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/* Test pthread_mutex_timedlock.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
#include <assert.h>
#include <error.h>
#include <errno.h>
#include <sys/time.h>
int
main (int argc, char **argv)
{
error_t err;
struct timespec ts;
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
struct timeval before, after;
int diff;
gettimeofday (&before, 0);
ts.tv_sec = before.tv_sec + 1;
ts.tv_nsec = before.tv_usec * 1000;
printf ("Starting wait @ %d\n", (int) before.tv_sec);
pthread_mutex_lock (&m);
/* A default mutex shall dead lock if locked twice. As such we do
not need spawn a second thread. */
err = pthread_mutex_timedlock (&m, &ts);
assert (err == ETIMEDOUT);
gettimeofday (&after, 0);
printf ("End wait @ %d\n", (int) after.tv_sec);
diff = after.tv_sec * 1000000 + after.tv_usec
- before.tv_sec * 1000000 - before.tv_usec;
if (diff < 900000 || diff > 1100000)
error (1, EGRATUITOUS, "pthread_mutex_timedlock waited %d us", diff);
return 0;
}
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