thr_umtx.c revision 177850
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: head/lib/libthr/thread/thr_umtx.c 177850 2008-04-02 04:32:31Z davidxu $ 27 * 28 */ 29 30#include "thr_private.h" 31#include "thr_umtx.h" 32 33void 34_thr_umutex_init(struct umutex *mtx) 35{ 36 static struct umutex default_mtx = DEFAULT_UMUTEX; 37 38 *mtx = default_mtx; 39} 40 41int 42__thr_umutex_lock(struct umutex *mtx) 43{ 44 if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) != -1) 45 return 0; 46 return (errno); 47} 48 49int 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)) != -1) 58 return (0); 59 return (errno); 60} 61 62int 63__thr_umutex_unlock(struct umutex *mtx) 64{ 65 if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) != -1) 66 return (0); 67 return (errno); 68} 69 70int 71__thr_umutex_trylock(struct umutex *mtx) 72{ 73 if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) != -1) 74 return (0); 75 return (errno); 76} 77 78int 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) != -1) 83 return (0); 84 return (errno); 85} 86 87int 88_thr_umtx_wait(volatile long *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)) != -1) 95 return (0); 96 return (errno); 97} 98 99int 100_thr_umtx_wait_uint(volatile u_int *mtx, u_int id, const struct timespec *timeout) 101{ 102 if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 103 timeout->tv_nsec <= 0))) 104 return (ETIMEDOUT); 105 if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT_UINT, id, 0, 106 __DECONST(void*, timeout)) != -1) 107 return (0); 108 return (errno); 109} 110 111int 112_thr_umtx_wake(volatile void *mtx, int nr_wakeup) 113{ 114 if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE, 115 nr_wakeup, 0, 0) != -1) 116 return (0); 117 return (errno); 118} 119 120void 121_thr_ucond_init(struct ucond *cv) 122{ 123 bzero(cv, sizeof(struct ucond)); 124} 125 126int 127_thr_ucond_wait(struct ucond *cv, struct umutex *m, 128 const struct timespec *timeout, int check_unparking) 129{ 130 if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 131 timeout->tv_nsec <= 0))) { 132 __thr_umutex_unlock(m); 133 return (ETIMEDOUT); 134 } 135 if (_umtx_op(cv, UMTX_OP_CV_WAIT, 136 check_unparking ? UMTX_CHECK_UNPARKING : 0, 137 m, __DECONST(void*, timeout)) != -1) { 138 return (0); 139 } 140 return (errno); 141} 142 143int 144_thr_ucond_signal(struct ucond *cv) 145{ 146 if (!cv->c_has_waiters) 147 return (0); 148 if (_umtx_op(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL) != -1) 149 return (0); 150 return (errno); 151} 152 153int 154_thr_ucond_broadcast(struct ucond *cv) 155{ 156 if (!cv->c_has_waiters) 157 return (0); 158 if (_umtx_op(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL) != -1) 159 return (0); 160 return (errno); 161} 162 163int 164__thr_rwlock_rdlock(struct urwlock *rwlock, int flags, struct timespec *tsp) 165{ 166 if (_umtx_op(rwlock, UMTX_OP_RW_RDLOCK, flags, NULL, tsp) != -1) 167 return (0); 168 return (errno); 169} 170 171int 172__thr_rwlock_wrlock(struct urwlock *rwlock, struct timespec *tsp) 173{ 174 if (_umtx_op(rwlock, UMTX_OP_RW_WRLOCK, 0, NULL, tsp) != -1) 175 return (0); 176 return (errno); 177} 178 179int 180__thr_rwlock_unlock(struct urwlock *rwlock) 181{ 182 if (_umtx_op(rwlock, UMTX_OP_RW_UNLOCK, 0, NULL, NULL) != -1) 183 return (0); 184 return (errno); 185} 186