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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 Make PS #0 as current process
>STYA pPs
ldx #K.PS.MAX
.1 lda #0
ldy #S.PS.SIZE-1
.2 sta (pPs),y
dey
bpl .2
lda pPs
clc
adc #S.PS.SIZE
sta pPs
bcc .3
inc pPs+1
.3 dex
bne .1
>LDYAI TskMgr.Table Make PS #0 as current process
>STYA pPs
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
>PUSHWI TmpBuffer256 push ENV value
>PUSHWI ENV.A2osX push ENV name
ldy #S.PS.hENV
lda TskMgr.Table,y
>PUSHA
jsr S.SetEnvVarP
rts
.9 sec
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.ExecProcessA (Blocking Parent PID)
* in :
* A = hMem To Cmd Line
* out :
* A = Child PSID
*--------------------------------------
S.ExecProcessA jsr S.CreateProcessA
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.CreateProcessA (Non Blocking)
* in :
* A = hMem To Full Cmd Line
* out :
* A = Child PSID
*--------------------------------------
S.CreateProcessA
sta S.CreateProcessA.Cmd
>LDYAI MSG.NEWPS
jsr S.SysScrPPSTRYA
jsr S.CreateChildProcess
bcs .99
sta S.CreateProcessA.CPSID
jsr S.SelectProcessA
lda S.CreateProcessA.Cmd
jsr S.InitProcessA
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.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
*--------------------------------------
* 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
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
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
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
ldy #S.PS.ID
lda (R.AX),y
clc Exit with A=PSID
rts
.99 sec
rts
*--------------------------------------
* S.InitProcessA
* In :
* A = hMem To Full Cmd Line
*--------------------------------------
S.InitProcessA >PUSHA Push Cmd Line
>PUSHBI $20 Push SEP=' '
>PUSHBI 0 Push 0 for getting CMD And ARGS
jsr S.PStrGetTkn
bcc .10
rts OOM error
.10 ldy #S.PS.hCMD
sta (pPs),y
>PUSHA push CMD for S.FileSearch
txa
ldy #S.PS.hARGS
sta (pPs),y set ARGS hMem (0 if none)
>PUSHWI ENV.PATH push ENVNAME=PATH
ldy #S.PS.hENV
lda (pPs),y
>PUSHA
jsr S.GetEnvVarP get value for ENV=PATH
bcs .99
sta S.InitProcessA.PATH save VALUE hMem for discard
>PUSHA A=PStr to ENV Value
jsr S.FileSearch find File in %PATH%
bcs .98
sta S.InitProcessA.FULLPATH save FULLPATH hMem for discard
pha
jsr S.SysScrPPSTRA
pla
jsr S.LoadBinA A = BinPath hMem
bcs .97
>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 .1 DS.SIZE=0...
lda (pCode),y
>PUSHAX Push DS.SIZE
>PUSHBI S.MEM.F.INIT0 Clear DS
jsr S.GetMem
bcs .97
>STYA pData
txa
ldy #S.PS.hDS
sta (pPs),y save DS hMem in TSKSLOT
.1 ldx #TSKMGR.INIT
jsr pCodeJmp Call INIT function
bcs .97
jsr .97
clc
rts
.97 pha save ERR
lda S.InitProcessA.FULLPATH
jsr S.FreeMemA
pla
.98 pha save ERR
lda S.InitProcessA.PATH
jsr S.FreeMemA
pla
.99 sec
rts
S.InitProcessA.PATH .BS 1
S.InitProcessA.FULLPATH .BS 1
*--------------------------------------
* S.SelectProcessA
* In : A=PSID
*--------------------------------------
S.SelectProcessA
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 .1
jsr S.GetMemPtrA
>STYA pData
.1 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
.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
*--------------------------------------
MSG.NEWPS >PSTRING "\nTskMgr:"
MAN
SAVE SYS/KERNEL.S.TSK
LOAD SYS/KERNEL.S
ASM
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