/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
## .globl _OSCompareAndSwap
_OSCompareAndSwap:
#; this is _lame_, the project will not currently accept asm code that
#; requires anything beyond a 386, but that chip:
#; - does not support MP
#; - does not support the cmpxchgl instruction
#; - does not support the lock meta-instruction
#; so what is a poor guy to do? comment it out...
pushl %edi
pushl %esi
movl 0+8+4(%esp),%eax # movl 8+8+4(%esp),%esi # cmpxchgl %edi,0(%esi) # andl $0x000000ff,%eax # popl %edi
ret