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/*-
* Copyright (c) 1998 Doug Rabson
* 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.
*
* $Id$
*/
#ifndef _MACHINE_ATOMIC_H_
#define _MACHINE_ATOMIC_H_
/*
* Various simple arithmetic on memory which is atomic in the presence
* of interrupts.
*
* Note: these versions are not SMP safe.
*/
#define atomic_set_char(P, V) (*(u_char*)(P) |= (V))
#define atomic_clear_char(P, V) (*(u_char*)(P) &= ~(V))
#define atomic_add_char(P, V) (*(u_char*)(P) += (V))
#define atomic_subtract_char(P, V) (*(u_char*)(P) -= (V))
#define atomic_set_short(P, V) (*(u_short*)(P) |= (V))
#define atomic_clear_short(P, V) (*(u_short*)(P) &= ~(V))
#define atomic_add_short(P, V) (*(u_short*)(P) += (V))
#define atomic_subtract_short(P, V) (*(u_short*)(P) -= (V))
#define atomic_set_int(P, V) (*(u_int*)(P) |= (V))
#define atomic_clear_int(P, V) (*(u_int*)(P) &= ~(V))
#define atomic_add_int(P, V) (*(u_int*)(P) += (V))
#define atomic_subtract_int(P, V) (*(u_int*)(P) -= (V))
#define atomic_set_long(P, V) (*(u_long*)(P) |= (V))
#define atomic_clear_long(P, V) (*(u_long*)(P) &= ~(V))
#define atomic_add_long(P, V) (*(u_long*)(P) += (V))
#define atomic_subtract_long(P, V) (*(u_long*)(P) -= (V))
#endif /* ! _MACHINE_ATOMIC_H_ */
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