thr_umtx.c revision 173801
1144518Sdavidxu/* 2144518Sdavidxu * Copyright (c) 2005 David Xu <davidxu@freebsd.org> 3144518Sdavidxu * All rights reserved. 4144518Sdavidxu * 5144518Sdavidxu * Redistribution and use in source and binary forms, with or without 6144518Sdavidxu * modification, are permitted provided that the following conditions 7144518Sdavidxu * are met: 8144518Sdavidxu * 1. Redistributions of source code must retain the above copyright 9144518Sdavidxu * notice unmodified, this list of conditions, and the following 10144518Sdavidxu * disclaimer. 11144518Sdavidxu * 2. Redistributions in binary form must reproduce the above copyright 12144518Sdavidxu * notice, this list of conditions and the following disclaimer in the 13144518Sdavidxu * documentation and/or other materials provided with the distribution. 14144518Sdavidxu * 15144518Sdavidxu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16144518Sdavidxu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17144518Sdavidxu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18144518Sdavidxu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19144518Sdavidxu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20144518Sdavidxu * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21144518Sdavidxu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22144518Sdavidxu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23144518Sdavidxu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24144518Sdavidxu * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25144518Sdavidxu * 26144518Sdavidxu * $FreeBSD: head/lib/libthr/thread/thr_umtx.c 173801 2007-11-21 05:21:58Z davidxu $ 27144518Sdavidxu * 28144518Sdavidxu */ 29144518Sdavidxu 30144518Sdavidxu#include "thr_private.h" 31144518Sdavidxu#include "thr_umtx.h" 32144518Sdavidxu 33163334Sdavidxuvoid 34163334Sdavidxu_thr_umutex_init(struct umutex *mtx) 35163334Sdavidxu{ 36163334Sdavidxu static struct umutex default_mtx = DEFAULT_UMUTEX; 37163334Sdavidxu 38163334Sdavidxu *mtx = default_mtx; 39163334Sdavidxu} 40163334Sdavidxu 41144518Sdavidxuint 42163334Sdavidxu__thr_umutex_lock(struct umutex *mtx) 43161680Sdavidxu{ 44165115Sdavidxu if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) != -1) 45161680Sdavidxu return 0; 46161680Sdavidxu return (errno); 47161680Sdavidxu} 48161680Sdavidxu 49161680Sdavidxuint 50163334Sdavidxu__thr_umutex_timedlock(struct umutex *mtx, 51161680Sdavidxu const struct timespec *timeout) 52161680Sdavidxu{ 53161680Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 54161680Sdavidxu timeout->tv_nsec <= 0))) 55161680Sdavidxu return (ETIMEDOUT); 56161680Sdavidxu if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 57165115Sdavidxu __DECONST(void *, timeout)) != -1) 58161680Sdavidxu return (0); 59161680Sdavidxu return (errno); 60161680Sdavidxu} 61161680Sdavidxu 62161680Sdavidxuint 63163334Sdavidxu__thr_umutex_unlock(struct umutex *mtx) 64161680Sdavidxu{ 65165115Sdavidxu if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) != -1) 66161680Sdavidxu return (0); 67161680Sdavidxu return (errno); 68161680Sdavidxu} 69161680Sdavidxu 70161680Sdavidxuint 71163334Sdavidxu__thr_umutex_trylock(struct umutex *mtx) 72161680Sdavidxu{ 73165115Sdavidxu if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) != -1) 74161680Sdavidxu return (0); 75161680Sdavidxu return (errno); 76161680Sdavidxu} 77161680Sdavidxu 78161680Sdavidxuint 79161680Sdavidxu__thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, 80161680Sdavidxu uint32_t *oldceiling) 81161680Sdavidxu{ 82165115Sdavidxu if (_umtx_op(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0) != -1) 83161680Sdavidxu return (0); 84161680Sdavidxu return (errno); 85161680Sdavidxu} 86161680Sdavidxu 87161680Sdavidxuint 88173801Sdavidxu_thr_umtx_wait(volatile long *mtx, long id, const struct timespec *timeout) 89144518Sdavidxu{ 90144518Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 91144518Sdavidxu timeout->tv_nsec <= 0))) 92144518Sdavidxu return (ETIMEDOUT); 93163334Sdavidxu if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0, 94165115Sdavidxu __DECONST(void*, timeout)) != -1) 95144518Sdavidxu return (0); 96144518Sdavidxu return (errno); 97144518Sdavidxu} 98144518Sdavidxu 99144518Sdavidxuint 100173801Sdavidxu_thr_umtx_wait_uint(volatile u_int *mtx, u_int id, const struct timespec *timeout) 101144518Sdavidxu{ 102173801Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 103173801Sdavidxu timeout->tv_nsec <= 0))) 104173801Sdavidxu return (ETIMEDOUT); 105173801Sdavidxu if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT_UINT, id, 0, 106173801Sdavidxu __DECONST(void*, timeout)) != -1) 107173801Sdavidxu return (0); 108173801Sdavidxu return (errno); 109173801Sdavidxu} 110173801Sdavidxu 111173801Sdavidxuint 112173801Sdavidxu_thr_umtx_wake(volatile void *mtx, int nr_wakeup) 113173801Sdavidxu{ 114163334Sdavidxu if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE, 115165115Sdavidxu nr_wakeup, 0, 0) != -1) 116144518Sdavidxu return (0); 117144518Sdavidxu return (errno); 118144518Sdavidxu} 119164877Sdavidxu 120164902Sdavidxuvoid 121164902Sdavidxu_thr_ucond_init(struct ucond *cv) 122164902Sdavidxu{ 123164902Sdavidxu bzero(cv, sizeof(struct ucond)); 124164902Sdavidxu} 125164902Sdavidxu 126164877Sdavidxuint 127164877Sdavidxu_thr_ucond_wait(struct ucond *cv, struct umutex *m, 128164877Sdavidxu const struct timespec *timeout, int check_unparking) 129164877Sdavidxu{ 130164877Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 131164877Sdavidxu timeout->tv_nsec <= 0))) { 132164877Sdavidxu __thr_umutex_unlock(m); 133164877Sdavidxu return (ETIMEDOUT); 134164877Sdavidxu } 135164877Sdavidxu if (_umtx_op(cv, UMTX_OP_CV_WAIT, 136164878Sdavidxu check_unparking ? UMTX_CHECK_UNPARKING : 0, 137165115Sdavidxu m, __DECONST(void*, timeout)) != -1) { 138164877Sdavidxu return (0); 139164877Sdavidxu } 140164877Sdavidxu return (errno); 141164877Sdavidxu} 142164877Sdavidxu 143164877Sdavidxuint 144164877Sdavidxu_thr_ucond_signal(struct ucond *cv) 145164877Sdavidxu{ 146165110Sdavidxu if (!cv->c_has_waiters) 147165110Sdavidxu return (0); 148165115Sdavidxu if (_umtx_op(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL) != -1) 149164877Sdavidxu return (0); 150164877Sdavidxu return (errno); 151164877Sdavidxu} 152164877Sdavidxu 153164877Sdavidxuint 154164877Sdavidxu_thr_ucond_broadcast(struct ucond *cv) 155164877Sdavidxu{ 156165110Sdavidxu if (!cv->c_has_waiters) 157165110Sdavidxu return (0); 158165115Sdavidxu if (_umtx_op(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL) != -1) 159164877Sdavidxu return (0); 160164877Sdavidxu return (errno); 161164877Sdavidxu} 162