1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <errno.h> 35 #include <pthread.h> 36 37 #include "threads.h" 38 39 void 40 mtx_destroy(mtx_t *mtx) 41 { 42 43 (void)pthread_mutex_destroy(mtx); 44 } 45 46 int 47 mtx_init(mtx_t *mtx, int type) 48 { 49 pthread_mutexattr_t attr; 50 int mt; 51 52 switch (type) { 53 case mtx_plain: 54 case mtx_timed: 55 mt = PTHREAD_MUTEX_NORMAL; 56 break; 57 case mtx_plain | mtx_recursive: 58 case mtx_timed | mtx_recursive: 59 mt = PTHREAD_MUTEX_RECURSIVE; 60 break; 61 default: 62 return (thrd_error); 63 } 64 65 if (pthread_mutexattr_init(&attr) != 0) 66 return (thrd_error); 67 if (pthread_mutexattr_settype(&attr, mt) != 0) 68 return (thrd_error); 69 if (pthread_mutex_init(mtx, &attr) != 0) 70 return (thrd_error); 71 return (thrd_success); 72 } 73 74 int 75 mtx_lock(mtx_t *mtx) 76 { 77 78 if (pthread_mutex_lock(mtx) != 0) 79 return (thrd_error); 80 return (thrd_success); 81 } 82 83 int 84 mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts) 85 { 86 87 switch (pthread_mutex_timedlock(mtx, ts)) { 88 case 0: 89 return (thrd_success); 90 case ETIMEDOUT: 91 return (thrd_timedout); 92 default: 93 return (thrd_error); 94 } 95 } 96 97 int 98 mtx_trylock(mtx_t *mtx) 99 { 100 101 switch (pthread_mutex_trylock(mtx)) { 102 case 0: 103 return (thrd_success); 104 case EBUSY: 105 return (thrd_busy); 106 default: 107 return (thrd_error); 108 } 109 } 110 111 int 112 mtx_unlock(mtx_t *mtx) 113 { 114 115 if (pthread_mutex_unlock(mtx) != 0) 116 return (thrd_error); 117 return (thrd_success); 118 } 119