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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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef _THR_FBSD_UMTX_H_
#define _THR_FBSD_UMTX_H_
#include <sys/umtx.h>
typedef long umtx_t;
/* simple lock routines.*/
int __thr_umtx_lock(volatile umtx_t *mtx, long id) __hidden;
int __thr_umtx_timedlock(volatile umtx_t *mtx, long id,
const struct timespec *timeout) __hidden;
int __thr_umtx_unlock(volatile umtx_t *mtx, long id) __hidden;
/* POSIX semantic lock routines */
int __thr_umutex_lock(struct umutex *mtx, uint32_t id) __hidden;
int __thr_umutex_timedlock(struct umutex *mtx, uint32_t id,
const struct timespec *timeout) __hidden;
int __thr_umutex_unlock(struct umutex *mtx, uint32_t id) __hidden;
int __thr_umutex_kern_trylock(struct umutex *mtx) __hidden;
int __thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling,
uint32_t *oldceiling) __hidden;
static inline void
_thr_umtx_init(volatile umtx_t *mtx)
{
*mtx = 0;
}
static inline int
_thr_umtx_trylock(volatile umtx_t *mtx, long id)
{
if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
return (0);
return (EBUSY);
}
static inline int
_thr_umtx_lock(volatile umtx_t *mtx, long id)
{
if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
return (0);
return (__thr_umtx_lock(mtx, id));
}
static inline int
_thr_umtx_timedlock(volatile umtx_t *mtx, long id,
const struct timespec *timeout)
{
if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
return (0);
return (__thr_umtx_timedlock(mtx, id, timeout));
}
static inline int
_thr_umtx_unlock(volatile umtx_t *mtx, long id)
{
if (atomic_cmpset_rel_ptr((volatile uintptr_t *)mtx,
(uintptr_t)id, (uintptr_t)UMTX_UNOWNED))
return (0);
return __thr_umtx_unlock(mtx, id);
}
int _thr_umtx_wait(volatile umtx_t *mtx, umtx_t exp,
const struct timespec *timeout) __hidden;
int _thr_umtx_wake(volatile umtx_t *mtx, int count) __hidden;
static inline int
_thr_umutex_trylock(struct umutex *mtx, uint32_t id)
{
if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
return (0);
if ((mtx->m_flags & UMUTEX_PRIO_PROTECT) == 0)
return (EBUSY);
return (__thr_umutex_kern_trylock(mtx));
}
static inline int
_thr_umutex_lock(struct umutex *mtx, uint32_t id)
{
if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
return (0);
return (__thr_umutex_lock(mtx, id));
}
static inline int
_thr_umutex_timedlock(struct umutex *mtx, uint32_t id,
const struct timespec *timeout)
{
if (atomic_cmpset_acq_32(&mtx->m_owner, UMUTEX_UNOWNED, id))
return (0);
return (__thr_umutex_timedlock(mtx, id, timeout));
}
static inline int
_thr_umutex_unlock(struct umutex *mtx, uint32_t id)
{
if (atomic_cmpset_rel_32(&mtx->m_owner, id, UMUTEX_UNOWNED))
return (0);
return (__thr_umutex_unlock(mtx, id));
}
#endif
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