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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 * 28 */ 29 30 #include "thr_private.h" 31 #include "thr_umtx.h" 32 33 void 34 _thr_umutex_init(struct umutex *mtx) 35 { 36 static struct umutex default_mtx = DEFAULT_UMUTEX; 37 38 *mtx = default_mtx; 39 } 40 41 int 42 __thr_umutex_lock(struct umutex *mtx) 43 { 44 if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) == 0) 45 return 0; 46 return (errno); 47 } 48 49 int 50 __thr_umutex_timedlock(struct umutex *mtx, 51 const struct timespec *timeout) 52 { 53 if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 54 timeout->tv_nsec <= 0))) 55 return (ETIMEDOUT); 56 if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 57 __DECONST(void *, timeout)) == 0) 58 return (0); 59 return (errno); 60 } 61 62 int 63 __thr_umutex_unlock(struct umutex *mtx) 64 { 65 if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) == 0) 66 return (0); 67 return (errno); 68 } 69 70 int 71 __thr_umutex_trylock(struct umutex *mtx) 72 { 73 if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) == 0) 74 return (0); 75 return (errno); 76 } 77 78 int 79 __thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, 80 uint32_t *oldceiling) 81 { 82 if (_umtx_op(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0) == 0) 83 return (0); 84 return (errno); 85 } 86 87 int 88 _thr_umtx_wait(volatile umtx_t *mtx, long id, const struct timespec *timeout) 89 { 90 if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 91 timeout->tv_nsec <= 0))) 92 return (ETIMEDOUT); 93 if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0, 94 __DECONST(void*, timeout)) == 0) 95 return (0); 96 return (errno); 97 } 98 99 int 100 _thr_umtx_wake(volatile umtx_t *mtx, int nr_wakeup) 101 { 102 if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE, 103 nr_wakeup, 0, 0) == 0) 104 return (0); 105 return (errno); 106 } 107