1 /*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Pawel Jakub Dawidek under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _SYNCH_H_ 33 #define _SYNCH_H_ 34 35 #include <assert.h> 36 #include <pthread.h> 37 #include <stdbool.h> 38 #include <time.h> 39 40 static __inline void 41 mtx_init(pthread_mutex_t *lock) 42 { 43 int error; 44 45 error = pthread_mutex_init(lock, NULL); 46 assert(error == 0); 47 } 48 static __inline void 49 mtx_lock(pthread_mutex_t *lock) 50 { 51 int error; 52 53 error = pthread_mutex_lock(lock); 54 assert(error == 0); 55 } 56 static __inline bool 57 mtx_trylock(pthread_mutex_t *lock) 58 { 59 int error; 60 61 error = pthread_mutex_trylock(lock); 62 assert(error == 0 || error == EBUSY); 63 return (error == 0); 64 } 65 static __inline void 66 mtx_unlock(pthread_mutex_t *lock) 67 { 68 int error; 69 70 error = pthread_mutex_unlock(lock); 71 assert(error == 0); 72 } 73 74 static __inline void 75 rw_init(pthread_rwlock_t *lock) 76 { 77 int error; 78 79 error = pthread_rwlock_init(lock, NULL); 80 assert(error == 0); 81 } 82 static __inline void 83 rw_rlock(pthread_rwlock_t *lock) 84 { 85 int error; 86 87 error = pthread_rwlock_rdlock(lock); 88 assert(error == 0); 89 } 90 static __inline void 91 rw_wlock(pthread_rwlock_t *lock) 92 { 93 int error; 94 95 error = pthread_rwlock_wrlock(lock); 96 assert(error == 0); 97 } 98 static __inline void 99 rw_unlock(pthread_rwlock_t *lock) 100 { 101 int error; 102 103 error = pthread_rwlock_unlock(lock); 104 assert(error == 0); 105 } 106 107 static __inline void 108 cv_init(pthread_cond_t *cv) 109 { 110 pthread_condattr_t attr; 111 int error; 112 113 error = pthread_condattr_init(&attr); 114 assert(error == 0); 115 error = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC); 116 assert(error == 0); 117 error = pthread_cond_init(cv, &attr); 118 assert(error == 0); 119 } 120 static __inline void 121 cv_wait(pthread_cond_t *cv, pthread_mutex_t *lock) 122 { 123 int error; 124 125 error = pthread_cond_wait(cv, lock); 126 assert(error == 0); 127 } 128 static __inline bool 129 cv_timedwait(pthread_cond_t *cv, pthread_mutex_t *lock, int timeout) 130 { 131 struct timespec ts; 132 int error; 133 134 if (timeout == 0) { 135 cv_wait(cv, lock); 136 return (false); 137 } 138 139 error = clock_gettime(CLOCK_MONOTONIC, &ts); 140 assert(error == 0); 141 ts.tv_sec += timeout; 142 error = pthread_cond_timedwait(cv, lock, &ts); 143 assert(error == 0 || error == ETIMEDOUT); 144 return (error == ETIMEDOUT); 145 } 146 static __inline void 147 cv_signal(pthread_cond_t *cv) 148 { 149 int error; 150 151 error = pthread_cond_signal(cv); 152 assert(error == 0); 153 } 154 static __inline void 155 cv_broadcast(pthread_cond_t *cv) 156 { 157 int error; 158 159 error = pthread_cond_broadcast(cv); 160 assert(error == 0); 161 } 162 #endif /* !_SYNCH_H_ */ 163