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A2osX/SYS/KERNEL.S.TSK.txt

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
*--------------------------------------
* S.TskMgrInit
*--------------------------------------
S.TskMgrInit stz TSKMGR.LASTID
lda #1
sta TSKMGR.SIZE One Slot Busy (Kernel PS=0)
>LDYAI TskMgr.Table Clear whole process table
>STYA ZPQuickPtr1
ldx #K.PS.MAX
.1 lda #0
ldy #S.PS.SIZE-1
.2 sta (ZPQuickPtr1),y
dey
bpl .2
lda ZPQuickPtr1
clc
adc #S.PS.SIZE
sta ZPQuickPtr1
bcc .3
inc ZPQuickPtr1+1
.3 dex
bne .1
lda #1
ldy #S.PS.hINDEV
sta TskMgr.Table,y Make In DEV = SYS
ldy #S.PS.hOUTDEV
sta TskMgr.Table,y Make OUT DEV = SYS
ldy #S.PS.hERRDEV
sta TskMgr.Table,y Make ERR DEV = SYS
jsr S.CreateEnv
bcs *
ldy #S.PS.hENV
sta TskMgr.Table,y
>LDYAI TmpBuffer256
jsr S.MLIGetPrefixYA
bcs *
>LDYAI TmpBuffer256
jsr S.NewPStrYA
bcs *
ldy #S.PS.hPREFIX
sta TskMgr.Table,y
S.TskMgrInit.Env
jsr S.SelectProcess0
ldx #DEVMGR.OPEN
jsr pDevJmp
>PUSHWI TmpBuffer256 push ENV value
>PUSHWI ENV.A2osX push ENV name
jsr S.SetEnvVarP
bcs .9
>PUSHWI ENV.PATH.VALUE
>PUSHWI ENV.PATH
jsr S.SetEnvVarP
bcs .9
>PUSHWI ENV.LIB.VALUE
>PUSHWI ENV.LIB
jsr S.SetEnvVarP
bcs .9
>PUSHWI ENV.DRV.VALUE
>PUSHWI ENV.DRV
jsr S.SetEnvVarP
bcs .9
.9 rts
*--------------------------------------
* S.TskMgrRun
*--------------------------------------
S.TskMgrRun >LDYAI TskMgr.Table+S.PS.SIZE
>STYA pPs
lda #1 Skip PS #0
sta TSKMGR.COUNT
.1 lda (pPs) get S.PS.F
and #S.PS.F.INUSE In use ?
beq .5
lda (pPs) get S.PS.F
and #S.PS.F.HOLD Waiting for Another Task to Terminate?
beq .2
ldy #S.PS.CID
lda (pPs),y
jsr S.GetPSByIDA
bcc .5 yes, running....
lda (pPs) get S.PS.F
and #$FF^S.PS.F.HOLD unmark as HOLD
sta (pPs)
.2 jsr S.SelectProcess
ldy #S.PS.PC+1 Is this PS sleeping?
lda (pPs),y
tax
dey
ora (pPs),y
beq .3 no, call TSKMGR.RUN
lda (pPs),y
clc
adc pCode
sta S.TskMgrRunJmp+1
txa
adc pCode+1
sta S.TskMgrRunJmp+2
lda #0 Don't forget to reset S.PC
ldy #S.PS.PC
sta (pPs),y
iny
sta (pPs),y
jsr S.TskMgrRunJmp
bra .4
.3 ldx #TSKMGR.RUN
jsr pCodeJmp Call RUN function
.4 bcc .5 RUN said CS=QUIT?
ldx #TSKMGR.QUIT yes, quit this process
jsr pCodeJmp Call QUIT function
ldy #S.PS.ID
lda (pPs),y
jsr S.FreeProcessA
bcs .99
.5 lda pPs
clc
adc #S.PS.SIZE
sta pPs
bcc .6
inc pPs+1
.6 lda TSKMGR.COUNT
inc TSKMGR.COUNT
cmp TSKMGR.SIZE
bne .1
clc
rts
.99 bra *
*--------------------------------------
S.TskMgrRunJmp jmp $FFFF
*--------------------------------------
* S.DispatchEvent
* IN:
* OUT:
* CS: Not Dispatched
* CC: Event Cleared
*--------------------------------------
S.DispatchEvent >LDYAI TskMgr.Table+S.PS.SIZE
>STYA pPs
lda #1
sta TSKMGR.COUNT
.1 lda (pPs) get S.PS.F
and #S.PS.F.INUSE In use ?
beq .3
lda (pPs) get S.PS.F
and #S.PS.F.HOLD Waiting for Another Task to Terminate?
bne .3
lda (pPs) get S.PS.F
and #S.PS.F.EVENT Accept Events ?
beq .3
jsr S.SelectProcess
ldx #TSKMGR.DOEVENT
jsr pCodeJmp Call DOEVENT function
bcc .8
.3 lda pPs
clc
adc #S.PS.SIZE
sta pPs
bcc .4
inc pPs+1
.4 lda TSKMGR.COUNT
inc TSKMGR.COUNT
cmp TSKMGR.SIZE
bne .1
sec
rts
.8 jsr S.DestroyEvent
clc
rts
*--------------------------------------
* S.TskMgrQuit
*--------------------------------------
S.TskMgrQuit clc
rts
*--------------------------------------
* PUBLIC
*--------------------------------------
* S.ExecProcessNewEnvYA
* S.ExecProcessYA (Blocking Parent PID)
* S.CreateProcessNewEnvYA
* S.CreateProcessYA (Non Blocking)
* in :
* A = hMem To Cmd Line
* Y = hMem To Args
* out :
* A = Child PSID
*--------------------------------------
S.ExecProcessNewEnvYA
ldx #S.PS.F.ENV
.HS 2C bit abs
S.ExecProcessYA ldx #0
S.ExecProcess jsr S.CreateProcess
bcs .9 terminated, do not set PID as HOLD
ldy #S.PS.CID
sta (pPs),y
pha Save Child PID
lda (pPs)
ora #S.PS.F.HOLD
sta (pPs)
pla Get Back PID
clc
.9 rts
*--------------------------------------
S.CreateProcessNewEnvYA
ldx #S.PS.F.ENV
.HS 2C bit abs
S.CreateProcessYA
ldx #0
S.CreateProcess stx S.CreateChildProcess.Flags
sta S.CreateProcessA.Cmd
sty S.CreateProcessA.Args
* lda #'|'
* jsr S.CoutA
* lda S.CreateProcessA.Cmd
* jsr S.PSTROutA
* lda #'|'
* jsr S.CoutA
* lda S.CreateProcessA.Args
* beq .1
* jsr S.PSTROutA
*.1 lda #'|'
* jsr S.CoutA
* lda #13
* jsr S.CoutA
jsr S.CreateChildProcess
bcs .99
sta S.CreateProcessA.CPSID
jsr S.SelectProcessA
jsr S.InitProcess
bcs .98 Init Failed or exit?
ldy #S.PS.PID switch back to Parent Process
lda (pPs),y
jsr S.SelectProcessA
lda S.CreateProcessA.CPSID
clc
rts
.98 pha save error code
ldy #S.PS.PID switch back to Parent Process
lda (pPs),y
jsr S.SelectProcessA
lda S.CreateProcessA.CPSID
jsr S.FreeProcessA
pla get back error code
.99 sec
rts
*--------------------------------------
S.CreateProcessA.Cmd .BS 1
S.CreateProcessA.Args .BS 1
S.CreateProcessA.CPSID .BS 1
*--------------------------------------
* S.GetPSByIDA
* In :
* A = PID
* Out :
* Y,A = PTR to TSKSLOT
*--------------------------------------
S.GetPSByIDA sta S.GetPSByIDA.PS
>LDYAI TskMgr.Table
>STYA ZPQuickPtr1
lda S.GetPSByIDA.PS
beq .8
ldx #0
.1 inx
lda ZPQuickPtr1
clc
adc #S.PS.SIZE
sta ZPQuickPtr1
bcc .2
inc ZPQuickPtr1+1
.2 lda (ZPQuickPtr1)
bpl .3
ldy #S.PS.ID
lda (ZPQuickPtr1),y
cmp S.GetPSByIDA.PS
beq .8
.3 cpx TSKMGR.SIZE
bne .1
.9 lda #TSKMGR.ERRNSP
sec
rts
.8 >LDYA ZPQuickPtr1
clc
rts
*--------------------------------------
S.GetPSByIDA.PS .BS 1
*--------------------------------------
S.Sleep ldy #S.PS.hCS
lda (pPs),y
>SYSCALL SYS.GetMemPtrA
>STYA S.Sleep.SaveCS
ldy #S.PS.PC
pla get PC LO
plx get PC HI
inc Advance PC one Byte
bne .1
inx
.1 sec
sbc S.Sleep.SaveCS
sta (pPs),y
iny
txa
sbc S.Sleep.SaveCS+1
sta (pPs),y
clc No error,
rts back to Kernel
*--------------------------------------
S.Sleep.SaveCS .BS 2
*--------------------------------------
* PRIVATE
*--------------------------------------
* S.CreateChildProcess
* in :
* out :
* A = PSID
* we cannot use ZPQuickPtrs
* because of calling S.PStrCpyA & S.DupEnvA
*--------------------------------------
S.CreateChildProcess
>LDYAI TskMgr.Table+S.PS.SIZE
>STYA R.AX
ldx #0
.1 inx
cpx TSKMGR.SIZE
beq .2
lda (R.AX) Found an empty slot
bpl .3
lda R.AL
clc
adc #S.PS.SIZE
sta R.AL
bcc .1
inc R.AH
bra .1
.2 cpx #K.PS.MAX
bne .30
lda #TSKMGR.ERROOH
sec
rts
.30 inc TSKMGR.SIZE
.3 lda #S.PS.F.INUSE
ora S.CreateChildProcess.Flags
sta (R.AX)
.4 inc TSKMGR.LASTID Get a PSID not alredy running
beq .4 not = 0
lda TSKMGR.LASTID
jsr S.GetPSByIDA
bcc .4
ldy #S.PS.ID
lda TSKMGR.LASTID
sta (R.AX),y
lda #0
ldy #S.PS.hCS
.5 sta (R.AX),y Blank Everything in this S.PS
iny
cpy #S.PS.SIZE
bne .5
lda S.CreateChildProcess.Flags
and #S.PS.F.ENV need to create ENV & Prefix ?
beq .6
ldy #S.PS.hPREFIX copy hPREFIX...
lda (pPs),y
jsr S.PStrCpyA
bcs .99
ldy #S.PS.hPREFIX
sta (R.AX),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
jsr S.DupEnvA
bcs .99
ldy #S.PS.hENV
sta (R.AX),y
bra .8
.6 ldy #S.PS.hPREFIX reuse same hPREFIX...
lda (pPs),y
sta (R.AX),y
ldy #S.PS.hENV ...and hENV from parent PS
lda (pPs),y
sta (R.AX),y
.8 ldy #S.PS.hINDEV
lda (pPs),y
sta (R.AX),y
ldy #S.PS.hOUTDEV
lda (pPs),y
sta (R.AX),y
ldy #S.PS.hERRDEV
lda (pPs),y
sta (R.AX),y
ldy #S.PS.ID
lda (pPs),y
ldy #S.PS.PID
sta (R.AX),y
lda TSKMGR.LASTID
clc Exit with A=PSID
rts
.99 sec
rts
*--------------------------------------
S.CreateChildProcess.Flags
.BS 1
*--------------------------------------
* S.InitProcess
* In :
* A = hMem To Full Cmd Line
*--------------------------------------
S.InitProcess lda S.CreateProcessA.Args
beq .1
jsr S.ExpandPStrA
.1 ldy #S.PS.hARGS
sta (pPs),y set ARGS hMem (0 if none)
lda S.CreateProcessA.Cmd
jsr S.ExpandPStrA
ldy #S.PS.hCMD
sta (pPs),y
jsr S.LoadBinA A = BinPath hMem
bcs .99
>STYA pCode save PTR to Code Segment
txa
ldy #S.PS.hCS
sta (pPs),y save CS hMem in TSKSLOT
ldy #H.BIN.BIN.DS.SIZE+1
lda (pCode),y Load DS.SIZE HI
tax
dey
ora (pCode),y
beq .2 DS.SIZE=0...
lda (pCode),y
>PUSHAX Push DS.SIZE
>PUSHBI S.MEM.F.INIT0 Clear DS
jsr S.GetMem
bcs .99
>STYA pData
txa
ldy #S.PS.hDS
sta (pPs),y save DS hMem in TSKSLOT
.2 ldx #TSKMGR.INIT
jsr pCodeJmp Call INIT function
.99 rts
*--------------------------------------
* S.SelectProcessA
* In : A=PSID
*--------------------------------------
S.SelectProcessA
tay
bne S.SelectProcessN
S.SelectProcess0
>LDYAI TskMgr.Table Make PS #0 as current process
>STYA pPs
bra S.SelectProcessDev
S.SelectProcessN
jsr S.GetPSByIDA
bcs *
>STYA pPs
S.SelectProcess ldy #S.PS.hCS
lda (pPs),y
jsr S.GetMemPtrA
>STYA pCode
ldy #S.PS.hDS
lda (pPs),y
beq S.SelectProcessDev
jsr S.GetMemPtrA
>STYA pData
S.SelectProcessDev
ldy #S.PS.hOUTDEV
lda (pPs),y
beq .8
jsr S.GetDevByIDA
>STYA pDev
.8 clc
rts
*--------------------------------------
* S.FreeProcessA
* In : A = PID to free
*--------------------------------------
S.FreeProcessA jsr S.GetPSByIDA
bcs .9
>STYA ZPQuickPtr1
ldy #S.PS.hARGS
lda (ZPQuickPtr1),y
beq .1
jsr S.FreeMemA
.1 ldy #S.PS.hCMD
lda (ZPQuickPtr1),y
beq .2
jsr S.FreeMemA
lda (ZPQuickPtr1) get S.PS.F
and #S.PS.F.ENV do we have to discard duplicated env & prefix ?
beq .4
.2 ldy #S.PS.hENV
lda (ZPQuickPtr1),y
beq .3
jsr S.FreeMemA
.3 ldy #S.PS.hPREFIX
lda (ZPQuickPtr1),y
beq .4
jsr S.FreeMemA
.4 ldy #S.PS.hDS
lda (ZPQuickPtr1),y
beq .5
jsr S.FreeMemA
.5 ldy #S.PS.hCS
lda (ZPQuickPtr1),y
beq .8
jsr S.FreeMemA
.8 lda #0
sta (ZPQuickPtr1) Mark TSKSLOT as free
clc
rts
.9 bra *
*--------------------------------------
TSKMGR.SIZE .BS 1
TSKMGR.COUNT .BS 1
TSKMGR.LASTID .BS 1
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.TSK
LOAD SYS/KERNEL.S
ASM
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