synch.h revision 211975
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 211975 2010-08-29 21:37:21Z pjd $ 30204076Spjd */ 31204076Spjd 32204076Spjd#ifndef _SYNCH_H_ 33204076Spjd#define _SYNCH_H_ 34204076Spjd 35204076Spjd#include <assert.h> 36211876Spjd#include <errno.h> 37204076Spjd#include <pthread.h> 38211876Spjd#include <pthread_np.h> 39204076Spjd#include <stdbool.h> 40204076Spjd#include <time.h> 41204076Spjd 42204076Spjdstatic __inline void 43204076Spjdmtx_init(pthread_mutex_t *lock) 44204076Spjd{ 45204076Spjd int error; 46204076Spjd 47204076Spjd error = pthread_mutex_init(lock, NULL); 48204076Spjd assert(error == 0); 49204076Spjd} 50204076Spjdstatic __inline void 51211975Spjdmtx_destroy(pthread_mutex_t *lock) 52211975Spjd{ 53211975Spjd int error; 54211975Spjd 55211975Spjd error = pthread_mutex_destroy(lock); 56211975Spjd assert(error == 0); 57211975Spjd} 58211975Spjdstatic __inline void 59204076Spjdmtx_lock(pthread_mutex_t *lock) 60204076Spjd{ 61204076Spjd int error; 62204076Spjd 63204076Spjd error = pthread_mutex_lock(lock); 64204076Spjd assert(error == 0); 65204076Spjd} 66204076Spjdstatic __inline bool 67204076Spjdmtx_trylock(pthread_mutex_t *lock) 68204076Spjd{ 69204076Spjd int error; 70204076Spjd 71204076Spjd error = pthread_mutex_trylock(lock); 72204076Spjd assert(error == 0 || error == EBUSY); 73204076Spjd return (error == 0); 74204076Spjd} 75204076Spjdstatic __inline void 76204076Spjdmtx_unlock(pthread_mutex_t *lock) 77204076Spjd{ 78204076Spjd int error; 79204076Spjd 80204076Spjd error = pthread_mutex_unlock(lock); 81204076Spjd assert(error == 0); 82204076Spjd} 83211876Spjdstatic __inline bool 84211876Spjdmtx_owned(pthread_mutex_t *lock) 85211876Spjd{ 86204076Spjd 87211876Spjd return (pthread_mutex_isowned_np(lock) != 0); 88211876Spjd} 89211876Spjd 90204076Spjdstatic __inline void 91204076Spjdrw_init(pthread_rwlock_t *lock) 92204076Spjd{ 93204076Spjd int error; 94204076Spjd 95204076Spjd error = pthread_rwlock_init(lock, NULL); 96204076Spjd assert(error == 0); 97204076Spjd} 98204076Spjdstatic __inline void 99211975Spjdrw_destroy(pthread_rwlock_t *lock) 100211975Spjd{ 101211975Spjd int error; 102211975Spjd 103211975Spjd error = pthread_rwlock_destroy(lock); 104211975Spjd assert(error == 0); 105211975Spjd} 106211975Spjdstatic __inline void 107204076Spjdrw_rlock(pthread_rwlock_t *lock) 108204076Spjd{ 109204076Spjd int error; 110204076Spjd 111204076Spjd error = pthread_rwlock_rdlock(lock); 112204076Spjd assert(error == 0); 113204076Spjd} 114204076Spjdstatic __inline void 115204076Spjdrw_wlock(pthread_rwlock_t *lock) 116204076Spjd{ 117204076Spjd int error; 118204076Spjd 119204076Spjd error = pthread_rwlock_wrlock(lock); 120204076Spjd assert(error == 0); 121204076Spjd} 122204076Spjdstatic __inline void 123204076Spjdrw_unlock(pthread_rwlock_t *lock) 124204076Spjd{ 125204076Spjd int error; 126204076Spjd 127204076Spjd error = pthread_rwlock_unlock(lock); 128204076Spjd assert(error == 0); 129204076Spjd} 130204076Spjd 131204076Spjdstatic __inline void 132204076Spjdcv_init(pthread_cond_t *cv) 133204076Spjd{ 134204076Spjd pthread_condattr_t attr; 135204076Spjd int error; 136204076Spjd 137204076Spjd error = pthread_condattr_init(&attr); 138204076Spjd assert(error == 0); 139204076Spjd error = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC); 140204076Spjd assert(error == 0); 141204076Spjd error = pthread_cond_init(cv, &attr); 142204076Spjd assert(error == 0); 143204076Spjd} 144204076Spjdstatic __inline void 145204076Spjdcv_wait(pthread_cond_t *cv, pthread_mutex_t *lock) 146204076Spjd{ 147204076Spjd int error; 148204076Spjd 149204076Spjd error = pthread_cond_wait(cv, lock); 150204076Spjd assert(error == 0); 151204076Spjd} 152204076Spjdstatic __inline bool 153204076Spjdcv_timedwait(pthread_cond_t *cv, pthread_mutex_t *lock, int timeout) 154204076Spjd{ 155204076Spjd struct timespec ts; 156204076Spjd int error; 157204076Spjd 158204076Spjd if (timeout == 0) { 159204076Spjd cv_wait(cv, lock); 160204076Spjd return (false); 161204076Spjd } 162204076Spjd 163204076Spjd error = clock_gettime(CLOCK_MONOTONIC, &ts); 164204076Spjd assert(error == 0); 165204076Spjd ts.tv_sec += timeout; 166204076Spjd error = pthread_cond_timedwait(cv, lock, &ts); 167204076Spjd assert(error == 0 || error == ETIMEDOUT); 168204076Spjd return (error == ETIMEDOUT); 169204076Spjd} 170204076Spjdstatic __inline void 171204076Spjdcv_signal(pthread_cond_t *cv) 172204076Spjd{ 173204076Spjd int error; 174204076Spjd 175204076Spjd error = pthread_cond_signal(cv); 176204076Spjd assert(error == 0); 177204076Spjd} 178204076Spjdstatic __inline void 179204076Spjdcv_broadcast(pthread_cond_t *cv) 180204076Spjd{ 181204076Spjd int error; 182204076Spjd 183204076Spjd error = pthread_cond_broadcast(cv); 184204076Spjd assert(error == 0); 185204076Spjd} 186204076Spjd#endif /* !_SYNCH_H_ */ 187