1 /*- 2 * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org> 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <errno.h> 33 #include <pthread.h> 34 35 #include "threads.h" 36 37 void 38 mtx_destroy(mtx_t *mtx) 39 { 40 41 (void)pthread_mutex_destroy(mtx); 42 } 43 44 int 45 mtx_init(mtx_t *mtx, int type) 46 { 47 pthread_mutexattr_t attr; 48 int mt; 49 50 switch (type) { 51 case mtx_plain: 52 case mtx_timed: 53 mt = PTHREAD_MUTEX_NORMAL; 54 break; 55 case mtx_plain | mtx_recursive: 56 case mtx_timed | mtx_recursive: 57 mt = PTHREAD_MUTEX_RECURSIVE; 58 break; 59 default: 60 return (thrd_error); 61 } 62 63 if (pthread_mutexattr_init(&attr) != 0) 64 return (thrd_error); 65 if (pthread_mutexattr_settype(&attr, mt) != 0) 66 return (thrd_error); 67 if (pthread_mutex_init(mtx, &attr) != 0) 68 return (thrd_error); 69 return (thrd_success); 70 } 71 72 int 73 mtx_lock(mtx_t *mtx) 74 { 75 76 if (pthread_mutex_lock(mtx) != 0) 77 return (thrd_error); 78 return (thrd_success); 79 } 80 81 int 82 mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts) 83 { 84 85 switch (pthread_mutex_timedlock(mtx, ts)) { 86 case 0: 87 return (thrd_success); 88 case ETIMEDOUT: 89 return (thrd_timedout); 90 default: 91 return (thrd_error); 92 } 93 } 94 95 int 96 mtx_trylock(mtx_t *mtx) 97 { 98 99 switch (pthread_mutex_trylock(mtx)) { 100 case 0: 101 return (thrd_success); 102 case EBUSY: 103 return (thrd_busy); 104 default: 105 return (thrd_error); 106 } 107 } 108 109 int 110 mtx_unlock(mtx_t *mtx) 111 { 112 113 if (pthread_mutex_unlock(mtx) != 0) 114 return (thrd_error); 115 return (thrd_success); 116 } 117