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67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*-
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* Copyright (c) 1997 Berkeley Software Design, Inc. 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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* 3. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``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 BERKELEY SOFTWARE DESIGN INC 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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* from BSDI $Id: mutex.h,v 2.7.2.35 2000/04/27 03:10:26 cp Exp $
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* $FreeBSD$
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*/
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#ifndef _MACHINE_MUTEX_H_
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#define _MACHINE_MUTEX_H_
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#ifdef LOCORE
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/*
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* Simple assembly macros to get and release mutexes.
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*
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* Note: All of these macros accept a "flags" argument and are analoguous
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* to the mtx_lock_flags and mtx_unlock_flags general macros. If one
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* desires to not pass a flag, the value 0 may be passed as second
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* argument.
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*
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* XXX: We only have MTX_LOCK_SPIN and MTX_UNLOCK_SPIN for now, since that's
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* all we use right now. We should add MTX_LOCK and MTX_UNLOCK (for sleep
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* locks) in the near future, however.
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*/
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#define MTX_LOCK_SPIN(lck, flags) \
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pushl $0 ; \
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pushl $0 ; \
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pushl $flags ; \
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pushl $lck ; \
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call _mtx_lock_spin_flags ; \
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addl $0x10, %esp ; \
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#define MTX_UNLOCK_SPIN(lck) \
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pushl $0 ; \
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pushl $0 ; \
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pushl $0 ; \
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pushl $lck ; \
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call _mtx_unlock_spin_flags ; \
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addl $0x10, %esp ; \
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#endif /* LOCORE */
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#endif /* __MACHINE_MUTEX_H */
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