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/*-
* Copyright (c) 2006, David Xu <davidxu@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#include <pthread.h>
#include <stdio.h>
#define NLOOPS 10
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
int wake;
int stop;
void *
thr_routine(void *arg)
{
pthread_mutex_lock(&m);
while (wake == 0)
pthread_cond_wait(&cv, &m);
pthread_mutex_unlock(&m);
while (stop == 0)
pthread_yield();
return (NULL);
}
int main(int argc, char **argv)
{
pthread_t td;
int i;
void *result;
pthread_setconcurrency(1);
for (i = 0; i < NLOOPS; ++i) {
stop = 0;
wake = 0;
pthread_create(&td, NULL, thr_routine, NULL);
sleep(1);
printf("trying: %d\n", i);
pthread_mutex_lock(&m);
wake = 1;
pthread_cond_signal(&cv);
pthread_cancel(td);
pthread_mutex_unlock(&m);
stop = 1;
result = NULL;
pthread_join(td, &result);
if (result == PTHREAD_CANCELED) {
printf("the condition variable implementation does not\n"
"conform to SUSv3, a thread unblocked from\n"
"condition variable still can be canceled.\n");
return (1);
}
}
printf("OK\n");
return (0);
}
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