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 * 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 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