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151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*
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* Copyright (c) 2005 David Xu <davidxu@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include "thr_private.h"
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#include "thr_umtx.h"
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void
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_thr_umutex_init(struct umutex *mtx)
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{
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static struct umutex default_mtx = DEFAULT_UMUTEX;
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*mtx = default_mtx;
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mtx->m_spincount = _thr_adaptive_spin;
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}
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int
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__thr_umutex_lock(struct umutex *mtx)
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{
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if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) != -1)
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return 0;
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return (errno);
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}
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int
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__thr_umutex_timedlock(struct umutex *mtx,
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const struct timespec *timeout)
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{
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if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 &&
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timeout->tv_nsec <= 0)))
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return (ETIMEDOUT);
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if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0,
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__DECONST(void *, timeout)) != -1)
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return (0);
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return (errno);
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}
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int
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__thr_umutex_unlock(struct umutex *mtx)
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{
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if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) != -1)
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return (0);
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return (errno);
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}
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int
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__thr_umutex_trylock(struct umutex *mtx)
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{
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if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) != -1)
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return (0);
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return (errno);
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}
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int
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__thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling,
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uint32_t *oldceiling)
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{
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if (_umtx_op(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0) != -1)
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return (0);
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return (errno);
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}
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int
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_thr_umtx_wait(volatile umtx_t *mtx, long id, const struct timespec *timeout)
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{
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if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 &&
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timeout->tv_nsec <= 0)))
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return (ETIMEDOUT);
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if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0,
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__DECONST(void*, timeout)) != -1)
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return (0);
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return (errno);
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}
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int
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_thr_umtx_wake(volatile umtx_t *mtx, int nr_wakeup)
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{
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if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE,
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nr_wakeup, 0, 0) != -1)
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return (0);
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return (errno);
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}
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void
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_thr_ucond_init(struct ucond *cv)
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{
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bzero(cv, sizeof(struct ucond));
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}
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int
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_thr_ucond_wait(struct ucond *cv, struct umutex *m,
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const struct timespec *timeout, int check_unparking)
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{
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if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 &&
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timeout->tv_nsec <= 0))) {
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__thr_umutex_unlock(m);
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return (ETIMEDOUT);
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}
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if (_umtx_op(cv, UMTX_OP_CV_WAIT,
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check_unparking ? UMTX_CHECK_UNPARKING : 0,
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m, __DECONST(void*, timeout)) != -1) {
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return (0);
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}
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return (errno);
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}
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int
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_thr_ucond_signal(struct ucond *cv)
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{
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if (!cv->c_has_waiters)
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return (0);
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if (_umtx_op(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL) != -1)
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return (0);
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return (errno);
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}
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int
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_thr_ucond_broadcast(struct ucond *cv)
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{
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if (!cv->c_has_waiters)
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return (0);
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if (_umtx_op(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL) != -1)
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return (0);
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return (errno);
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}
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