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48 lines
1.5 KiB
48 lines
1.5 KiB
page ,132
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;-----------------------------Module-Header-----------------------------;
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; Module Name: CLISTI.ASM - Enter/leave critical sections
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;
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; Created: 18 April 1994
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; Author: Jim Geist [jimge]
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;
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; Copyright (c) 1984-1994 Microsoft Corporation
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;
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;-----------------------------------------------------------------------;
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?PLM = 1
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?WIN = 0
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PMODE = 1
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.xlist
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include cmacros.inc
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.list
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createSeg %SEGNAME, CodeSeg, word, public, CODE
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sBegin CodeSeg
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assumes cs, CodeSeg
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public EnterCrit
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EnterCrit proc near
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pop ax ; Near return address
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pushf ; Save flags
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cli ; Interrupts off
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push ax ; Near return address
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ret ; and return
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EnterCrit endp
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public LeaveCrit
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LeaveCrit proc near
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pop ax ; Near return address
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pop bx ; Flag state
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test bx, 0200h ; Interrupts should be on?
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jz short @F ; Nope
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sti ; Yep
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@@: push ax ; Near return address
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ret ; and return
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LeaveCrit endp
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sEnd CodeSeg
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end
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