1 /*-
2  * Copyright (c) 2008 Dag-Erling Coïdan 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  * $FreeBSD$
28  */
29 
30 #include <pthread.h>
31 #include <pthread_np.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 
35 static void *
36 thread(void *arg)
37 {
38 	pthread_mutex_t *mtx = arg;
39 
40 	if (pthread_mutex_isowned_np(mtx) != 0) {
41 		printf("pthread_mutex_isowned_np() returned non-zero\n"
42 		    "for a mutex held by another thread\n");
43 		exit(1);
44 	}
45 	return (NULL);
46 }
47 
48 int
49 main(int argc, char *argv[])
50 {
51 	pthread_t thr;
52 	pthread_mutex_t mtx;
53 
54 	pthread_mutex_init(&mtx, NULL);
55 	if (pthread_mutex_isowned_np(&mtx) != 0) {
56 		printf("pthread_mutex_isowned_np() returned non-zero\n"
57 		    "for a mutex that is not held\n");
58 		exit(1);
59 	}
60 	pthread_mutex_lock(&mtx);
61 	if (pthread_mutex_isowned_np(&mtx) == 0) {
62 		printf("pthread_mutex_isowned_np() returned zero\n"
63 		    "for a mutex we hold ourselves\n");
64 		exit(1);
65 	}
66 	pthread_create(&thr, NULL, thread, &mtx);
67 	pthread_join(thr, NULL);
68 	pthread_mutex_unlock(&mtx);
69 	if (pthread_mutex_isowned_np(&mtx) != 0) {
70 		printf("pthread_mutex_isowned_np() returned non-zero\n"
71 		    "for a mutex that is not held\n");
72 		exit(1);
73 	}
74 
75 	printf("OK\n");
76 	exit(0);
77 }
78