lock_byte.asm

英特尔&#174 线程构建模块（英特尔&#174 TBB）是一个屡获殊荣的 C++ 运行时库

; Copyright 2005-2007 Intel Corporation.  All Rights Reserved.
;
; This file is part of Threading Building Blocks.
;
; Threading Building Blocks is free software; you can redistribute it
; and/or modify it under the terms of the GNU General Public License
; version 2 as published by the Free Software Foundation.
;
; Threading Building Blocks is distributed in the hope that it will be
; useful, but WITHOUT ANY WARRANTY; without even the implied warranty
; of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with Threading Building Blocks; if not, write to the Free Software
; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
;
; As a special exception, you may use this file as part of a free software
; library without restriction.  Specifically, if other files instantiate
; templates or use macros or inline functions from this file, or you compile
; this file and link it with other files to produce an executable, this
; file does not by itself cause the resulting executable to be covered by
; the GNU General Public License.  This exception does not however
; invalidate any other reasons why the executable file might be covered by
; the GNU General Public License.

; DO NOT EDIT - AUTOMATICALLY GENERATED FROM .s FILE
.686
.model flat,c
.code 
	ALIGN 4
	PUBLIC c __TBB_machine_trylockbyte
__TBB_machine_trylockbyte:
	mov edx,4[esp]
	mov al,[edx]
	mov cl,1
	test al,1
	jnz __TBB_machine_trylockbyte_contended
	lock cmpxchg [edx],cl
	jne __TBB_machine_trylockbyte_contended
	mov eax,1
	ret
__TBB_machine_trylockbyte_contended:
	xor eax,eax
	ret
end