1 /*-
2 * Copyright (c) 2008 Dag-Erling Smørgrav
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, this list of conditions and the following disclaimer
10 * in this position and unchanged.
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 AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <pthread.h>
29 #include <pthread_np.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32
33 static void *
thread(void * arg)34 thread(void *arg)
35 {
36 pthread_mutex_t *mtx = arg;
37
38 if (pthread_mutex_isowned_np(mtx) != 0) {
39 printf("pthread_mutex_isowned_np() returned non-zero\n"
40 "for a mutex held by another thread\n");
41 exit(1);
42 }
43 return (NULL);
44 }
45
46 int
main(void)47 main(void)
48 {
49 pthread_t thr;
50 pthread_mutex_t mtx;
51
52 pthread_mutex_init(&mtx, NULL);
53 if (pthread_mutex_isowned_np(&mtx) != 0) {
54 printf("pthread_mutex_isowned_np() returned non-zero\n"
55 "for a mutex that is not held\n");
56 exit(1);
57 }
58 pthread_mutex_lock(&mtx);
59 if (pthread_mutex_isowned_np(&mtx) == 0) {
60 printf("pthread_mutex_isowned_np() returned zero\n"
61 "for a mutex we hold ourselves\n");
62 exit(1);
63 }
64 pthread_create(&thr, NULL, thread, &mtx);
65 pthread_join(thr, NULL);
66 pthread_mutex_unlock(&mtx);
67 if (pthread_mutex_isowned_np(&mtx) != 0) {
68 printf("pthread_mutex_isowned_np() returned non-zero\n"
69 "for a mutex that is not held\n");
70 exit(1);
71 }
72
73 printf("OK\n");
74 exit(0);
75 }
76