1/*-
2 * Copyright (c) 2006, David Xu <davidxu@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 *
28 */
29#include <pthread.h>
30#include <stdio.h>
31#include <unistd.h>
32
33#define NLOOPS	10
34
35pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
36pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
37
38int wake;
39int stop;
40
41void *
42thr_routine(void *arg)
43{
44	pthread_mutex_lock(&m);
45	while (wake == 0)
46		pthread_cond_wait(&cv, &m);
47	pthread_mutex_unlock(&m);
48
49	while (stop == 0)
50		pthread_yield();
51	return (NULL);
52}
53
54int main(int argc, char **argv)
55{
56	pthread_t td;
57	int i;
58	void *result;
59
60	pthread_setconcurrency(1);
61	for (i = 0; i < NLOOPS; ++i) {
62		stop = 0;
63		wake = 0;
64
65		pthread_create(&td, NULL, thr_routine, NULL);
66		sleep(1);
67		printf("trying: %d\n", i);
68		pthread_mutex_lock(&m);
69		wake = 1;
70		pthread_cond_signal(&cv);
71		pthread_cancel(td);
72		pthread_mutex_unlock(&m);
73		stop = 1;
74		result = NULL;
75		pthread_join(td, &result);
76		if (result == PTHREAD_CANCELED) {
77			printf("the condition variable implementation does not\n"
78			       "conform to SUSv3, a thread unblocked from\n"
79			       "condition variable still can be canceled.\n");
80			return (1);
81		}
82	}
83
84	printf("OK\n");
85	return (0);
86}
87