1 /*- 2 * Copyright (c) 2005 David Xu <davidxu@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 #ifndef _THR_FBSD_UMTX_H_ 30 #define _THR_FBSD_UMTX_H_ 31 32 #include <sys/umtx.h> 33 34 typedef long umtx_t; 35 36 int __thr_umtx_lock(volatile umtx_t *mtx, long id); 37 int __thr_umtx_timedlock(volatile umtx_t *mtx, long id, 38 const struct timespec *timeout); 39 int __thr_umtx_unlock(volatile umtx_t *mtx, long id); 40 41 static inline void 42 _thr_umtx_init(volatile umtx_t *mtx) 43 { 44 *mtx = 0; 45 } 46 47 static inline int 48 _thr_umtx_trylock(volatile umtx_t *mtx, long id) 49 { 50 return umtx_trylock((struct umtx *)mtx, id); 51 } 52 53 static inline int 54 _thr_umtx_lock(volatile umtx_t *mtx, long id) 55 { 56 if (atomic_cmpset_acq_ptr(mtx, (void *)UMTX_UNOWNED, (void *)id)) 57 return (0); 58 return __thr_umtx_lock(mtx, id); 59 } 60 61 static inline int 62 _thr_umtx_timedlock(volatile umtx_t *mtx, long id, 63 const struct timespec *timeout) 64 { 65 if (atomic_cmpset_acq_ptr(mtx, (void *)UMTX_UNOWNED, (void *)id)) 66 return (0); 67 return __thr_umtx_timedlock(mtx, id, timeout); 68 } 69 70 static inline int 71 _thr_umtx_unlock(volatile umtx_t *mtx, long id) 72 { 73 if (atomic_cmpset_rel_ptr(mtx, (void *)id, (void *)UMTX_UNOWNED)) 74 return (0); 75 return __thr_umtx_unlock(mtx, id); 76 } 77 78 int _thr_umtx_wait(volatile umtx_t *mtx, umtx_t exp, 79 const struct timespec *timeout); 80 int _thr_umtx_wake(volatile umtx_t *mtx, int count); 81 #endif 82