2 * Copyright (c) 2006, David Xu <davidxu@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
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.
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.
35 pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
36 pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
42 thr_routine(void *arg)
44 pthread_mutex_lock(&m);
46 pthread_cond_wait(&cv, &m);
47 pthread_mutex_unlock(&m);
54 int main(int argc, char **argv)
60 pthread_setconcurrency(1);
61 for (i = 0; i < NLOOPS; ++i) {
65 pthread_create(&td, NULL, thr_routine, NULL);
67 printf("trying: %d\n", i);
68 pthread_mutex_lock(&m);
70 pthread_cond_signal(&cv);
72 pthread_mutex_unlock(&m);
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");