1e986eeecSDavid Xu /*-
2e986eeecSDavid Xu * Copyright (c) 2006, David Xu <davidxu@freebsd.org>
3e986eeecSDavid Xu * All rights reserved.
4e986eeecSDavid Xu *
5e986eeecSDavid Xu * Redistribution and use in source and binary forms, with or without
6e986eeecSDavid Xu * modification, are permitted provided that the following conditions
7e986eeecSDavid Xu * are met:
8e986eeecSDavid Xu * 1. Redistributions of source code must retain the above copyright
9e986eeecSDavid Xu * notice unmodified, this list of conditions, and the following
10e986eeecSDavid Xu * disclaimer.
11e986eeecSDavid Xu * 2. Redistributions in binary form must reproduce the above copyright
12e986eeecSDavid Xu * notice, this list of conditions and the following disclaimer in the
13e986eeecSDavid Xu * documentation and/or other materials provided with the distribution.
14e986eeecSDavid Xu *
15e986eeecSDavid Xu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16e986eeecSDavid Xu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17e986eeecSDavid Xu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18e986eeecSDavid Xu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19e986eeecSDavid Xu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20e986eeecSDavid Xu * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21e986eeecSDavid Xu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22e986eeecSDavid Xu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23e986eeecSDavid Xu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24e986eeecSDavid Xu * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25e986eeecSDavid Xu *
26e986eeecSDavid Xu */
27e986eeecSDavid Xu #include <pthread.h>
28e986eeecSDavid Xu #include <stdio.h>
294b30cabdSKevin Lo #include <unistd.h>
30e986eeecSDavid Xu
31e986eeecSDavid Xu #define NLOOPS 10
32e986eeecSDavid Xu
33ef135466SEd Maste static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
34ef135466SEd Maste static pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
35e986eeecSDavid Xu
36ef135466SEd Maste static int wake;
37ef135466SEd Maste static int stop;
38e986eeecSDavid Xu
39ef135466SEd Maste static void *
thr_routine(void * arg __unused)40ef135466SEd Maste thr_routine(void *arg __unused)
41e986eeecSDavid Xu {
42e986eeecSDavid Xu pthread_mutex_lock(&m);
43e986eeecSDavid Xu while (wake == 0)
44e986eeecSDavid Xu pthread_cond_wait(&cv, &m);
45e986eeecSDavid Xu pthread_mutex_unlock(&m);
46e986eeecSDavid Xu
47e986eeecSDavid Xu while (stop == 0)
48e986eeecSDavid Xu pthread_yield();
49e986eeecSDavid Xu return (NULL);
50e986eeecSDavid Xu }
51e986eeecSDavid Xu
527bfe5e45SEd Maste int
main(void)537bfe5e45SEd Maste main(void)
54e986eeecSDavid Xu {
55e986eeecSDavid Xu pthread_t td;
56e986eeecSDavid Xu int i;
57e986eeecSDavid Xu void *result;
58e986eeecSDavid Xu
59e986eeecSDavid Xu pthread_setconcurrency(1);
60e986eeecSDavid Xu for (i = 0; i < NLOOPS; ++i) {
61e986eeecSDavid Xu stop = 0;
62e986eeecSDavid Xu wake = 0;
63e986eeecSDavid Xu
64e986eeecSDavid Xu pthread_create(&td, NULL, thr_routine, NULL);
65e986eeecSDavid Xu sleep(1);
66e986eeecSDavid Xu printf("trying: %d\n", i);
67e986eeecSDavid Xu pthread_mutex_lock(&m);
68e986eeecSDavid Xu wake = 1;
69e986eeecSDavid Xu pthread_cond_signal(&cv);
70e986eeecSDavid Xu pthread_cancel(td);
71e986eeecSDavid Xu pthread_mutex_unlock(&m);
72e986eeecSDavid Xu stop = 1;
73e986eeecSDavid Xu result = NULL;
74e986eeecSDavid Xu pthread_join(td, &result);
75e986eeecSDavid Xu if (result == PTHREAD_CANCELED) {
76a3f452e8SDavid Xu printf("the condition variable implementation does not\n"
77e986eeecSDavid Xu "conform to SUSv3, a thread unblocked from\n"
78e986eeecSDavid Xu "condition variable still can be canceled.\n");
79e986eeecSDavid Xu return (1);
80e986eeecSDavid Xu }
81e986eeecSDavid Xu }
82e986eeecSDavid Xu
83e986eeecSDavid Xu printf("OK\n");
84e986eeecSDavid Xu return (0);
85e986eeecSDavid Xu }
86