A2osX/SYS/KERNEL.S.PS.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*/--------------------------------------
* # ExecPSNewEnv.YA
* # ExecPS.YA (Blocking Parent PID)
* # CreatePSNewEnv.YA 
* # CreatePS.YA (Non Blocking)
* ## In:
*   Y,A = PTR To Cmd Line
* ## Out:
*   A = Child PSID
*\--------------------------------------
K.ExecPSNewEnv.YA
				ldx #S.PS.F.DUPENV+S.PS.F.HOLD
				.HS 2C					bit abs
K.ExecPS.YA
				ldx #S.PS.F.HOLD
				.HS 2C					bit abs
K.CreatePSNewEnv.YA 
				ldx #S.PS.F.DUPENV
				.HS 2C					bit abs
K.CreatePS.YA
				ldx #0
				stx PS.Flags
				>STYA PS.CL
				
				jsr PS.CreateChild		Child S.PS at ZPPtr3
				bcs .9

				sta .8+1
				
				>LDYA PS.CL
				jsr PS.CmdLine2Args		Y,A = Args[0]
				bcs .9

				jsr PS.Init
				bcc .8
				
				pha						save error code
				lda .8+1
				jsr CORE.PSFree.A
				pla						get back error code
				sec
				rts

.8				lda #$ff				self modified
.9				rts
*--------------------------------------
PS.Flags		.BS 1
PS.CL			.BS 2
*--------------------------------------
* PS.CreateChild
*  in :
*  out :
*   A = PSID
* we cannot use ZPPtrs1 & 2
* because of calling K.NewStr.YA & S.DupEnv.A
*--------------------------------------
PS.CreateChild	ldx #0
				
.1				cpx CORE.PSCount
				beq .2
				
				lda PS.Table.PID,x
				beq .31					Found an empty slot
				inx
				bra .1
				
.2				cpx #K.PS.MAX
				bne .3
				
				lda #K.E.OOH
				sec
				rts

.99				plx				
				rts
				
.3				inc CORE.PSCount

.31				phx						save PS inex
				
.4				inc CORE.LastPSID		Get a PSID not alredy running
				beq .4					not = 0
				lda CORE.LastPSID
				jsr CORE.GetPSByID.A
				bcc .4

				plx
				lda CORE.LastPSID
				sta PS.Table.PID,x
				phx
				
				>LDYAI S.PS
				jsr K.GetMem0.YA		Blank Everything in this S.PS
				bcs .99
				
				>STYA ZPPtr3
				txa
				plx
				sta PS.Table.hMem,x
				
				jsr PS.SetMemOwner	Set Ownership

				ldy #S.PS.PID
				lda CORE.LastPSID
				sta (ZPPtr3),y

				lda #S.PS.F.DUPENV
				bit PS.Flags	need to create ENV & Prefix ?	
				beq .6					no...
				
				sta (ZPPtr3)			Mark this PS with DUPENV flag
				
				ldy #S.PS.hPREFIX		copy hPREFIX...
				lda (pPs),y
				jsr K.GetMemPtr.A
				jsr K.NewStr.YA
				bcs .9
				
				jsr PS.SetMemOwner	Set Ownership

				txa
				ldy #S.PS.hPREFIX
				sta (ZPPtr3),y
				
				ldy #S.PS.hENV			...and hENV from parent PS
				lda (pPs),y
				jsr PS.DupEnv.A
				bcs .9
				
				ldy #S.PS.hENV
				sta (ZPPtr3),y
				bra .8
				
.6				ldy #S.PS.hPREFIX		reuse same hPREFIX...
				lda (pPs),y
				sta (ZPPtr3),y
				
				ldy #S.PS.hENV			...and hENV from parent PS
				lda (pPs),y
				sta (ZPPtr3),y
				
.8				ldy #S.PS.hStdIn

.81				lda (pPs),y
				sta (ZPPtr3),y
				iny
				cpy #S.PS.hStdErr+1
				bne .81
				
				ldy #S.PS.PID
				lda (pPs),y
				
				ldy #S.PS.PPID
				sta (ZPPtr3),y

				lda #S.PS.F.HOLD
				bit PS.Flags
				beq .82
				
				ora (pPs)
				sta (pPs)				HOLD parent PS if ExecPS
				
.82				lda #S.PS.F.INIT
				ora (ZPPtr3)
				sta (ZPPtr3)			Make this PS Init....

				ldy #S.PS.CPID
				lda CORE.LastPSID
				sta (pPs),y

				clc						Exit with A=PSID
.9				rts
*--------------------------------------
PS.CmdLine2Args	>STYA ZPPtr1

				ldy #0

.1				lda (ZPPtr1),y			compute strlen in Y,X
				beq .2
				iny
				bne .1					max 255

.2				tya						+2 for ending 0 for last string, and endig 0 for array
				clc
				adc #2
				tay
				lda #0
				bcc .3
				inc
				
.3				jsr K.GetMem.YA
				bcs .9

				phy					save PTR.LO
				pha					save PTR.HI
				>STYA ZPPtr2

				txa
				ldy #S.PS.hARGS
				sta (ZPPtr3),y
				
				jsr PS.SetMemOwner	Set Ownership
				
				stz PS.bInQuote
				
				ldy #$ff
				ldx #0				Arg Count
				
.4				iny
				lda (ZPPtr1),y
				beq .7
				
				cmp #'"'			found a quote ?
				bne .5
				lda PS.bInQuote
				eor #$ff
				sta PS.bInQuote
				bra .4
				
.5				cmp #' '
				bne .6
				
				bit PS.bInQuote
				bmi .6
				
				inx					Found one arg !!!
				lda #0				set this token End
				
.6				sta (ZPPtr2) 

				inc ZPPtr2
				bne .4
				inc ZPPtr2+1
				bra .4
				
.7				sta (ZPPtr2)		set Arg Ending 0
	
				inc ZPPtr2
				bne .8
				inc ZPPtr2+1
				
.8				sta (ZPPtr2)		set Array Ending 0
				
				txa
				ldy #S.PS.ARGC
				sta (ZPPtr3),y				
				
				pla					get back PTR.HI
				ply					get back PTR.LO

				clc
.9				rts

PS.bInQuote		.BS 1
*--------------------------------------
PS.Init			jsr BIN.Load.YA			Y,A=filename full path
				bcs .9
				>STYA ZPPtr4			save PTR to Code Segment
				
				phy
				ldy #S.PS.ZP.CODE+1
				sta (ZPPtr3),y			save pCode HI...
				dey
				pla
				sta (ZPPtr3),y			save pCode LO...
				
				txa
				ldy #S.PS.hCS
				sta (ZPPtr3),y			save CS hMem in S.PS

				jsr K.GetMemByID.A
				jsr PS.SetMemOwner	Set Ownership

				ldy #H.BIN.EXE.DS.SIZE+1
				lda (ZPPtr4),y			Load DS.SIZE HI
				tax
				dey	
				ora (ZPPtr4),y

				beq .2					DS.SIZE=0...

				lda (ZPPtr4),y
				tay
				txa						Y,A = DS.SIZE
				jsr K.GetMem0.YA
				bcs .9

				phy
				ldy #S.PS.ZP.DATA+1
				sta (ZPPtr3),y			save pData HI...
				dey
				pla
				sta (ZPPtr3),y			save pData LO...

				txa
				ldy #S.PS.hDS
				sta (ZPPtr3),y			save DS hMem in S.PS

				jsr PS.SetMemOwner	Set Ownership

.2				ldy #H.BIN.EXE.SS.SIZE
				lda (ZPPtr4),y			Load SS.SIZE

				ldy #S.PS.ZP.STACK
				sta (ZPPtr3),y			save pStack LO...
				
				tay						

				bne .3					SS.SIZE.LO=0, set as default $100
				lda #1					SS.SIZE.HI
				.HS 2C					bit abs
.3				lda #0

				ldx #S.MEM.F.ALIGN
				jsr MEM.GetMem.YAX
				bcs .9

				ldy #S.PS.ZP.STACK+1
				sta (ZPPtr3),y			save pStack HI...(LO alredy set to Stack TOP)

				txa
				ldy #S.PS.hSS
				sta (ZPPtr3),y			save SS hMem in S.PS

				jsr PS.SetMemOwner		Set Ownership
				
				ldy #H.BIN.EXE.ZP.SIZE
				lda (ZPPtr4),y
				clc
				adc #8					Add room for 4 saved PTR
				ldy #S.PS.ZP.SIZE
				sta (ZPPtr3),y

				clc
.9				rts
*--------------------------------------
* PS.DupEnv.A
*  In:
*   A = ENV hMem To Duplicate
*  Out:
*   A = hMem to new ENV
*--------------------------------------
PS.DupEnv.A		jsr K.GetMemPtr.A
				>STYA ZPPtr1
				
				>LDYAI K.ENV.SIZE
				jsr K.GetMem.YA
				bcs .9
				
				>STYA ZPPtr2
				
				jsr PS.SetMemOwner	Set Ownership
				
				ldy #0
				
.1				lda (ZPPtr1),y
				sta (ZPPtr2),y
				beq .8
				
.2				iny
				bne .3
				inc ZPPtr1+1
				inc ZPPtr2+1
				
.3				lda (ZPPtr1),y
				sta (ZPPtr2),y
				bne .2
				
				iny
				bne .1
				inc ZPPtr1+1
				inc ZPPtr2+1
				bra .1
				
.8				txa						hMem
				
				clc
.9				rts
*--------------------------------------
PS.SetMemOwner	lda CORE.LastPSID
				ldy #S.MEM.OWNERPID
				sta (ZPMEMMGR),y
				rts
*--------------------------------------
K.GetPSStatus.A	jsr CORE.GetPSByID.A
				bcs .9
				>STYA ZPPtr1
				lda (ZPPtr1)
.9				rts
*--------------------------------------
K.GetPSList.YA	>STYA ZPPtr1

				ldx #0
				
				ldy #1
				lda CORE.InKernelStat
				sta (ZPPtr1),y
				
				iny
				
.1				lda PS.Table.PID,x
				beq .2
				
				lda PS.Table.hMem,x
				sta (ZPPtr1),y
				iny

				lda PS.Table.Stat,x
				sta (ZPPtr1),y
				iny
				
.2				inx
				cpx CORE.PSCount
				bne .1
				
.9				tya
				lsr
				dec
				sta (ZPPtr1)
				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.PS
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM