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