synch.h revision 204076
1204076Spjd/*- 2204076Spjd * Copyright (c) 2009-2010 The FreeBSD Foundation 3204076Spjd * All rights reserved. 4204076Spjd * 5204076Spjd * This software was developed by Pawel Jakub Dawidek under sponsorship from 6204076Spjd * the FreeBSD Foundation. 7204076Spjd * 8204076Spjd * Redistribution and use in source and binary forms, with or without 9204076Spjd * modification, are permitted provided that the following conditions 10204076Spjd * are met: 11204076Spjd * 1. Redistributions of source code must retain the above copyright 12204076Spjd * notice, this list of conditions and the following disclaimer. 13204076Spjd * 2. Redistributions in binary form must reproduce the above copyright 14204076Spjd * notice, this list of conditions and the following disclaimer in the 15204076Spjd * documentation and/or other materials provided with the distribution. 16204076Spjd * 17204076Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18204076Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19204076Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20204076Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21204076Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22204076Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23204076Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24204076Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25204076Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26204076Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27204076Spjd * SUCH DAMAGE. 28204076Spjd * 29204076Spjd * $FreeBSD: head/sbin/hastd/synch.h 204076 2010-02-18 23:16:19Z pjd $ 30204076Spjd */ 31204076Spjd 32204076Spjd#ifndef _SYNCH_H_ 33204076Spjd#define _SYNCH_H_ 34204076Spjd 35204076Spjd#include <assert.h> 36204076Spjd#include <pthread.h> 37204076Spjd#include <stdbool.h> 38204076Spjd#include <time.h> 39204076Spjd 40204076Spjdstatic __inline void 41204076Spjdmtx_init(pthread_mutex_t *lock) 42204076Spjd{ 43204076Spjd int error; 44204076Spjd 45204076Spjd error = pthread_mutex_init(lock, NULL); 46204076Spjd assert(error == 0); 47204076Spjd} 48204076Spjdstatic __inline void 49204076Spjdmtx_lock(pthread_mutex_t *lock) 50204076Spjd{ 51204076Spjd int error; 52204076Spjd 53204076Spjd error = pthread_mutex_lock(lock); 54204076Spjd assert(error == 0); 55204076Spjd} 56204076Spjdstatic __inline bool 57204076Spjdmtx_trylock(pthread_mutex_t *lock) 58204076Spjd{ 59204076Spjd int error; 60204076Spjd 61204076Spjd error = pthread_mutex_trylock(lock); 62204076Spjd assert(error == 0 || error == EBUSY); 63204076Spjd return (error == 0); 64204076Spjd} 65204076Spjdstatic __inline void 66204076Spjdmtx_unlock(pthread_mutex_t *lock) 67204076Spjd{ 68204076Spjd int error; 69204076Spjd 70204076Spjd error = pthread_mutex_unlock(lock); 71204076Spjd assert(error == 0); 72204076Spjd} 73204076Spjd 74204076Spjdstatic __inline void 75204076Spjdrw_init(pthread_rwlock_t *lock) 76204076Spjd{ 77204076Spjd int error; 78204076Spjd 79204076Spjd error = pthread_rwlock_init(lock, NULL); 80204076Spjd assert(error == 0); 81204076Spjd} 82204076Spjdstatic __inline void 83204076Spjdrw_rlock(pthread_rwlock_t *lock) 84204076Spjd{ 85204076Spjd int error; 86204076Spjd 87204076Spjd error = pthread_rwlock_rdlock(lock); 88204076Spjd assert(error == 0); 89204076Spjd} 90204076Spjdstatic __inline void 91204076Spjdrw_wlock(pthread_rwlock_t *lock) 92204076Spjd{ 93204076Spjd int error; 94204076Spjd 95204076Spjd error = pthread_rwlock_wrlock(lock); 96204076Spjd assert(error == 0); 97204076Spjd} 98204076Spjdstatic __inline void 99204076Spjdrw_unlock(pthread_rwlock_t *lock) 100204076Spjd{ 101204076Spjd int error; 102204076Spjd 103204076Spjd error = pthread_rwlock_unlock(lock); 104204076Spjd assert(error == 0); 105204076Spjd} 106204076Spjd 107204076Spjdstatic __inline void 108204076Spjdcv_init(pthread_cond_t *cv) 109204076Spjd{ 110204076Spjd pthread_condattr_t attr; 111204076Spjd int error; 112204076Spjd 113204076Spjd error = pthread_condattr_init(&attr); 114204076Spjd assert(error == 0); 115204076Spjd error = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC); 116204076Spjd assert(error == 0); 117204076Spjd error = pthread_cond_init(cv, &attr); 118204076Spjd assert(error == 0); 119204076Spjd} 120204076Spjdstatic __inline void 121204076Spjdcv_wait(pthread_cond_t *cv, pthread_mutex_t *lock) 122204076Spjd{ 123204076Spjd int error; 124204076Spjd 125204076Spjd error = pthread_cond_wait(cv, lock); 126204076Spjd assert(error == 0); 127204076Spjd} 128204076Spjdstatic __inline bool 129204076Spjdcv_timedwait(pthread_cond_t *cv, pthread_mutex_t *lock, int timeout) 130204076Spjd{ 131204076Spjd struct timespec ts; 132204076Spjd int error; 133204076Spjd 134204076Spjd if (timeout == 0) { 135204076Spjd cv_wait(cv, lock); 136204076Spjd return (false); 137204076Spjd } 138204076Spjd 139204076Spjd error = clock_gettime(CLOCK_MONOTONIC, &ts); 140204076Spjd assert(error == 0); 141204076Spjd ts.tv_sec += timeout; 142204076Spjd error = pthread_cond_timedwait(cv, lock, &ts); 143204076Spjd assert(error == 0 || error == ETIMEDOUT); 144204076Spjd return (error == ETIMEDOUT); 145204076Spjd} 146204076Spjdstatic __inline void 147204076Spjdcv_signal(pthread_cond_t *cv) 148204076Spjd{ 149204076Spjd int error; 150204076Spjd 151204076Spjd error = pthread_cond_signal(cv); 152204076Spjd assert(error == 0); 153204076Spjd} 154204076Spjdstatic __inline void 155204076Spjdcv_broadcast(pthread_cond_t *cv) 156204076Spjd{ 157204076Spjd int error; 158204076Spjd 159204076Spjd error = pthread_cond_broadcast(cv); 160204076Spjd assert(error == 0); 161204076Spjd} 162204076Spjd#endif /* !_SYNCH_H_ */ 163