November 01, 1990
A Non-Preemptive Multitasking Executive In C++Listing 6
TITLE cswitch.asm - interface for Zortech C++(Small Model)
DOSSEG
MODEL SMALL
CODE
EXTRN _addrRunningTcbSp:WORD
EXTRN _running:WORD
PUBLIC _ContextSwitch_Nv
_ContextSwitch_Nv PROC NEAR
push bp
mov bp, word ptr _addrRunningTcbSp
mov [bp], sp
mov bp, word ptr _running ; sp = running->sp
mov sp, [bp + 4] ; WARNING 4 depends of LINK
pop bp ; 2 ptrs(4)
ret
_ContextSwitch_Nv ENDP
PUBLIC _RunNext_Nv
_RunNext_Nv PROC NEAR
push bp
mov bp, word ptr _running ; sp = running->sp
mov sp, [bp + 4] ; WARNING 4 depends of LINK
pop bp ; 2 ptrs(4)
ret
_RunNext_Nv ENDP
END
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