88 lines
2.8 KiB
C
88 lines
2.8 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, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _THR_FBSD_UMTX_H_
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#define _THR_FBSD_UMTX_H_
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#include <sys/umtx.h>
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typedef long umtx_t;
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int __thr_umtx_lock(volatile umtx_t *mtx, long id);
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int __thr_umtx_timedlock(volatile umtx_t *mtx, long id,
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const struct timespec *timeout);
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int __thr_umtx_unlock(volatile umtx_t *mtx, long id);
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static inline void
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_thr_umtx_init(volatile umtx_t *mtx)
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{
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*mtx = 0;
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}
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static inline int
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_thr_umtx_trylock(volatile umtx_t *mtx, long id)
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{
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if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
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(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
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return (0);
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return (EBUSY);
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}
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static inline int
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_thr_umtx_lock(volatile umtx_t *mtx, long id)
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{
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if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
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(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
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return (0);
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return (__thr_umtx_lock(mtx, id));
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}
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static inline int
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_thr_umtx_timedlock(volatile umtx_t *mtx, long id,
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const struct timespec *timeout)
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{
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if (atomic_cmpset_acq_ptr((volatile uintptr_t *)mtx,
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(uintptr_t)UMTX_UNOWNED, (uintptr_t)id))
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return (0);
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return (__thr_umtx_timedlock(mtx, id, timeout));
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}
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static inline int
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_thr_umtx_unlock(volatile umtx_t *mtx, long id)
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{
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if (atomic_cmpset_rel_ptr((volatile uintptr_t *)mtx,
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(uintptr_t)id, (uintptr_t)UMTX_UNOWNED))
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return (0);
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return __thr_umtx_unlock(mtx, id);
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}
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int _thr_umtx_wait(volatile umtx_t *mtx, umtx_t exp,
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const struct timespec *timeout);
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int _thr_umtx_wake(volatile umtx_t *mtx, int count);
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#endif
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