84 lines
2.5 KiB
C
84 lines
2.5 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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int
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__thr_umtx_lock(volatile umtx_t *mtx, long id)
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{
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while (_umtx_op(__DEVOLATILE(struct umtx *, mtx),
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UMTX_OP_LOCK, id, 0, 0))
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;
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return (0);
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}
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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 (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(struct umtx *, mtx), UMTX_OP_LOCK, id, 0,
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__DECONST(void *, timeout)) == 0)
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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_unlock(volatile umtx_t *mtx, long id)
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{
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if (_umtx_op(__DEVOLATILE(struct umtx *, mtx), UMTX_OP_UNLOCK,
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id, 0, 0) == 0)
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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(struct umtx *, mtx), UMTX_OP_WAIT, id, 0,
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__DECONST(void*, timeout)) == 0)
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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(struct umtx *, mtx), UMTX_OP_WAKE,
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nr_wakeup, 0, 0) == 0)
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return (0);
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return (errno);
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}
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