thr_umtx.c revision 178647
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 178647 2008-04-29 03:58:18Z davidxu $ 27144518Sdavidxu * 28144518Sdavidxu */ 29144518Sdavidxu 30144518Sdavidxu#include "thr_private.h" 31144518Sdavidxu#include "thr_umtx.h" 32144518Sdavidxu 33177853Sdavidxu#ifndef HAS__UMTX_OP_ERR 34177853Sdavidxuint _umtx_op_err(void *obj, int op, u_long val, void *uaddr, void *uaddr2) 35177853Sdavidxu{ 36177853Sdavidxu if (_umtx_op(obj, op, val, uaddr, uaddr2) == -1) 37177853Sdavidxu return (errno); 38177853Sdavidxu return (0); 39177853Sdavidxu} 40177853Sdavidxu#endif 41177853Sdavidxu 42163334Sdavidxuvoid 43163334Sdavidxu_thr_umutex_init(struct umutex *mtx) 44163334Sdavidxu{ 45163334Sdavidxu static struct umutex default_mtx = DEFAULT_UMUTEX; 46163334Sdavidxu 47163334Sdavidxu *mtx = default_mtx; 48163334Sdavidxu} 49163334Sdavidxu 50144518Sdavidxuint 51163334Sdavidxu__thr_umutex_lock(struct umutex *mtx) 52161680Sdavidxu{ 53177853Sdavidxu return _umtx_op_err(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0); 54161680Sdavidxu} 55161680Sdavidxu 56161680Sdavidxuint 57163334Sdavidxu__thr_umutex_timedlock(struct umutex *mtx, 58161680Sdavidxu const struct timespec *timeout) 59161680Sdavidxu{ 60161680Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 61161680Sdavidxu timeout->tv_nsec <= 0))) 62161680Sdavidxu return (ETIMEDOUT); 63177853Sdavidxu return _umtx_op_err(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 64177853Sdavidxu __DECONST(void *, timeout)); 65161680Sdavidxu} 66161680Sdavidxu 67161680Sdavidxuint 68163334Sdavidxu__thr_umutex_unlock(struct umutex *mtx) 69161680Sdavidxu{ 70177853Sdavidxu return _umtx_op_err(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0); 71161680Sdavidxu} 72161680Sdavidxu 73161680Sdavidxuint 74163334Sdavidxu__thr_umutex_trylock(struct umutex *mtx) 75161680Sdavidxu{ 76177853Sdavidxu return _umtx_op_err(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0); 77161680Sdavidxu} 78161680Sdavidxu 79161680Sdavidxuint 80161680Sdavidxu__thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, 81161680Sdavidxu uint32_t *oldceiling) 82161680Sdavidxu{ 83177853Sdavidxu return _umtx_op_err(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0); 84161680Sdavidxu} 85161680Sdavidxu 86161680Sdavidxuint 87173801Sdavidxu_thr_umtx_wait(volatile long *mtx, long id, const struct timespec *timeout) 88144518Sdavidxu{ 89144518Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 90144518Sdavidxu timeout->tv_nsec <= 0))) 91144518Sdavidxu return (ETIMEDOUT); 92177853Sdavidxu return _umtx_op_err(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0, 93177853Sdavidxu __DECONST(void*, timeout)); 94144518Sdavidxu} 95144518Sdavidxu 96144518Sdavidxuint 97178647Sdavidxu_thr_umtx_wait_uint(volatile u_int *mtx, u_int id, const struct timespec *timeout, int shared) 98144518Sdavidxu{ 99173801Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 100173801Sdavidxu timeout->tv_nsec <= 0))) 101173801Sdavidxu return (ETIMEDOUT); 102178647Sdavidxu return _umtx_op_err(__DEVOLATILE(void *, mtx), 103178647Sdavidxu shared ? UMTX_OP_WAIT_UINT : UMTX_OP_WAIT_UINT_PRIVATE, id, 0, 104178647Sdavidxu __DECONST(void*, timeout)); 105173801Sdavidxu} 106173801Sdavidxu 107173801Sdavidxuint 108178647Sdavidxu_thr_umtx_wake(volatile void *mtx, int nr_wakeup, int shared) 109173801Sdavidxu{ 110178647Sdavidxu return _umtx_op_err(__DEVOLATILE(void *, mtx), shared ? UMTX_OP_WAKE : UMTX_OP_WAKE_PRIVATE, 111177853Sdavidxu nr_wakeup, 0, 0); 112144518Sdavidxu} 113164877Sdavidxu 114164902Sdavidxuvoid 115164902Sdavidxu_thr_ucond_init(struct ucond *cv) 116164902Sdavidxu{ 117164902Sdavidxu bzero(cv, sizeof(struct ucond)); 118164902Sdavidxu} 119164902Sdavidxu 120164877Sdavidxuint 121164877Sdavidxu_thr_ucond_wait(struct ucond *cv, struct umutex *m, 122164877Sdavidxu const struct timespec *timeout, int check_unparking) 123164877Sdavidxu{ 124164877Sdavidxu if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && 125164877Sdavidxu timeout->tv_nsec <= 0))) { 126164877Sdavidxu __thr_umutex_unlock(m); 127164877Sdavidxu return (ETIMEDOUT); 128164877Sdavidxu } 129177853Sdavidxu return _umtx_op_err(cv, UMTX_OP_CV_WAIT, 130164878Sdavidxu check_unparking ? UMTX_CHECK_UNPARKING : 0, 131177853Sdavidxu m, __DECONST(void*, timeout)); 132164877Sdavidxu} 133164877Sdavidxu 134164877Sdavidxuint 135164877Sdavidxu_thr_ucond_signal(struct ucond *cv) 136164877Sdavidxu{ 137165110Sdavidxu if (!cv->c_has_waiters) 138165110Sdavidxu return (0); 139177853Sdavidxu return _umtx_op_err(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL); 140164877Sdavidxu} 141164877Sdavidxu 142164877Sdavidxuint 143164877Sdavidxu_thr_ucond_broadcast(struct ucond *cv) 144164877Sdavidxu{ 145165110Sdavidxu if (!cv->c_has_waiters) 146165110Sdavidxu return (0); 147177853Sdavidxu return _umtx_op_err(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL); 148164877Sdavidxu} 149177850Sdavidxu 150177850Sdavidxuint 151177850Sdavidxu__thr_rwlock_rdlock(struct urwlock *rwlock, int flags, struct timespec *tsp) 152177850Sdavidxu{ 153177853Sdavidxu return _umtx_op_err(rwlock, UMTX_OP_RW_RDLOCK, flags, NULL, tsp); 154177850Sdavidxu} 155177850Sdavidxu 156177850Sdavidxuint 157177850Sdavidxu__thr_rwlock_wrlock(struct urwlock *rwlock, struct timespec *tsp) 158177850Sdavidxu{ 159177853Sdavidxu return _umtx_op_err(rwlock, UMTX_OP_RW_WRLOCK, 0, NULL, tsp); 160177850Sdavidxu} 161177850Sdavidxu 162177850Sdavidxuint 163177850Sdavidxu__thr_rwlock_unlock(struct urwlock *rwlock) 164177850Sdavidxu{ 165177853Sdavidxu return _umtx_op_err(rwlock, UMTX_OP_RW_UNLOCK, 0, NULL, NULL); 166177850Sdavidxu} 167