thr_umtx.c revision 164877
1164190Sjkoshy/* 2164190Sjkoshy * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 3164190Sjkoshy * All rights reserved. 4164190Sjkoshy * 5164190Sjkoshy * Redistribution and use in source and binary forms, with or without 6164190Sjkoshy * modification, are permitted provided that the following conditions 7164190Sjkoshy * are met: 8164190Sjkoshy * 1. Redistributions of source code must retain the above copyright 9164190Sjkoshy * notice unmodified, this list of conditions, and the following 10164190Sjkoshy * disclaimer. 11164190Sjkoshy * 2. Redistributions in binary form must reproduce the above copyright 12164190Sjkoshy * notice, this list of conditions and the following disclaimer in the 13164190Sjkoshy * documentation and/or other materials provided with the distribution. 14164190Sjkoshy * 15164190Sjkoshy * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16164190Sjkoshy * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17164190Sjkoshy * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18164190Sjkoshy * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19164190Sjkoshy * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20164190Sjkoshy * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21164190Sjkoshy * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22164190Sjkoshy * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23164190Sjkoshy * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24164190Sjkoshy * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25164190Sjkoshy * 26164190Sjkoshy * $FreeBSD: head/lib/libthr/thread/thr_umtx.c 164877 2006-12-04 14:20:41Z davidxu $ 27164190Sjkoshy * 28164190Sjkoshy */ 29164190Sjkoshy 30164190Sjkoshy#include "thr_private.h" 31164190Sjkoshy#include "thr_umtx.h" 32164190Sjkoshy 33164190Sjkoshyvoid 34164190Sjkoshy_thr_umutex_init(struct umutex *mtx) 35164190Sjkoshy{ 36164190Sjkoshy static struct umutex default_mtx = DEFAULT_UMUTEX; 37164190Sjkoshy 38164190Sjkoshy *mtx = default_mtx; 39164190Sjkoshy} 40164190Sjkoshy 41164190Sjkoshyint 42164190Sjkoshy__thr_umutex_lock(struct umutex *mtx) 43164190Sjkoshy{ 44164190Sjkoshy if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) == 0) 45164190Sjkoshy return 0; 46164190Sjkoshy return (errno); 47164190Sjkoshy} 48164190Sjkoshy 49164190Sjkoshyint 50164190Sjkoshy__thr_umutex_timedlock(struct umutex *mtx, 51164190Sjkoshy const struct timespec *timeout) 52164190Sjkoshy{ 53164190Sjkoshy if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 54164190Sjkoshy timeout->tv_nsec <= 0))) 55164190Sjkoshy return (ETIMEDOUT); 56164190Sjkoshy if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 57164190Sjkoshy __DECONST(void *, timeout)) == 0) 58164190Sjkoshy return (0); 59164190Sjkoshy return (errno); 60164190Sjkoshy} 61164190Sjkoshy 62164190Sjkoshyint 63164190Sjkoshy__thr_umutex_unlock(struct umutex *mtx) 64164190Sjkoshy{ 65164190Sjkoshy if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) == 0) 66164190Sjkoshy return (0); 67164190Sjkoshy return (errno); 68164190Sjkoshy} 69164190Sjkoshy 70164190Sjkoshyint 71164190Sjkoshy__thr_umutex_trylock(struct umutex *mtx) 72164190Sjkoshy{ 73164190Sjkoshy if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) == 0) 74164190Sjkoshy return (0); 75164190Sjkoshy return (errno); 76164190Sjkoshy} 77164190Sjkoshy 78164190Sjkoshyint 79164190Sjkoshy__thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, 80164190Sjkoshy uint32_t *oldceiling) 81164190Sjkoshy{ 82164190Sjkoshy if (_umtx_op(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0) == 0) 83164190Sjkoshy return (0); 84164190Sjkoshy return (errno); 85164190Sjkoshy} 86164190Sjkoshy 87164190Sjkoshyint 88164190Sjkoshy_thr_umtx_wait(volatile umtx_t *mtx, long id, const struct timespec *timeout) 89164190Sjkoshy{ 90164190Sjkoshy if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 91164190Sjkoshy timeout->tv_nsec <= 0))) 92164190Sjkoshy return (ETIMEDOUT); 93164190Sjkoshy if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0, 94164190Sjkoshy __DECONST(void*, timeout)) == 0) 95164190Sjkoshy return (0); 96164190Sjkoshy return (errno); 97164190Sjkoshy} 98164190Sjkoshy 99164190Sjkoshyint 100164190Sjkoshy_thr_umtx_wake(volatile umtx_t *mtx, int nr_wakeup) 101164190Sjkoshy{ 102164190Sjkoshy if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE, 103164190Sjkoshy nr_wakeup, 0, 0) == 0) 104164190Sjkoshy return (0); 105164190Sjkoshy return (errno); 106164190Sjkoshy} 107164190Sjkoshy 108164190Sjkoshyint 109164190Sjkoshy_thr_ucond_wait(struct ucond *cv, struct umutex *m, 110164190Sjkoshy const struct timespec *timeout, int check_unparking) 111164190Sjkoshy{ 112164190Sjkoshy if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 113164190Sjkoshy timeout->tv_nsec <= 0))) { 114164190Sjkoshy __thr_umutex_unlock(m); 115164190Sjkoshy return (ETIMEDOUT); 116164190Sjkoshy } 117164190Sjkoshy if (_umtx_op(cv, UMTX_OP_CV_WAIT, 118164190Sjkoshy check_unparking ? UMTX_CHECK_UNPAKING : 0, 119164190Sjkoshy m, __DECONST(void*, timeout)) == 0) { 120164190Sjkoshy return (0); 121164190Sjkoshy } 122164190Sjkoshy return (errno); 123164190Sjkoshy} 124164190Sjkoshy 125164190Sjkoshyint 126164190Sjkoshy_thr_ucond_signal(struct ucond *cv) 127164190Sjkoshy{ 128164190Sjkoshy if (_umtx_op(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL) == 0) 129164190Sjkoshy return (0); 130164190Sjkoshy return (errno); 131164190Sjkoshy} 132164190Sjkoshy 133164190Sjkoshyint 134164190Sjkoshy_thr_ucond_broadcast(struct ucond *cv) 135164190Sjkoshy{ 136164190Sjkoshy if (_umtx_op(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL) == 0) 137164190Sjkoshy return (0); 138164190Sjkoshy return (errno); 139164190Sjkoshy} 140164190Sjkoshy