069e9bc1b4
Add some overflow checks to read/write (from bde). Change all modifications to vm_page::flags, vm_page::busy, vm_object::flags and vm_object::paging_in_progress to use operations which are not interruptable. Reviewed by: Bruce Evans <bde@zeta.org.au>
78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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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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* $Id$
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*/
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#ifndef _MACHINE_ATOMIC_H_
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#define _MACHINE_ATOMIC_H_
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/*
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* Various simple arithmetic on memory which is atomic in the presence
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* of interrupts and SMP safe.
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*/
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void atomic_set_8(u_int8_t *, u_int8_t);
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void atomic_clear_8(u_int8_t *, u_int8_t);
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void atomic_add_8(u_int8_t *, u_int8_t);
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void atomic_subtract_8(u_int8_t *, u_int8_t);
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void atomic_set_16(u_int16_t *, u_int16_t);
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void atomic_clear_16(u_int16_t *, u_int16_t);
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void atomic_add_16(u_int16_t *, u_int16_t);
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void atomic_subtract_16(u_int16_t *, u_int16_t);
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void atomic_set_32(u_int32_t *, u_int32_t);
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void atomic_clear_32(u_int32_t *, u_int32_t);
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void atomic_add_32(u_int32_t *, u_int32_t);
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void atomic_subtract_32(u_int32_t *, u_int32_t);
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void atomic_set_64(u_int64_t *, u_int64_t);
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void atomic_clear_64(u_int64_t *, u_int64_t);
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void atomic_add_64(u_int64_t *, u_int64_t);
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void atomic_subtract_64(u_int64_t *, u_int64_t);
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#define atomic_set_char atomic_set_8
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#define atomic_clear_char atomic_clear_8
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#define atomic_add_char atomic_add_8
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#define atomic_subtract_char atomic_subtract_8
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#define atomic_set_short atomic_set_16
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#define atomic_clear_short atomic_clear_16
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#define atomic_add_short atomic_add_16
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#define atomic_subtract_short atomic_subtract_16
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#define atomic_set_int atomic_set_32
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#define atomic_clear_int atomic_clear_32
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#define atomic_add_int atomic_add_32
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#define atomic_subtract_int atomic_subtract_32
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#define atomic_set_long atomic_set_64
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#define atomic_clear_long atomic_clear_64
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#define atomic_add_long atomic_add_64
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#define atomic_subtract_long atomic_subtract_64
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#endif /* ! _MACHINE_ATOMIC_H_ */
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