mirror of
https://github.com/forth-ev/VolksForth.git
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137 lines
8.7 KiB
Plaintext
137 lines
8.7 KiB
Plaintext
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0 \\ *** Multitasker *** bp 12oct86
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1
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2 Dieses File enth<74>lt die Worte f<>r das Multitasking.
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3
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4 Mit TASK werden Tasks eingerichtet. Jede Task hat ihren eige-
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5 nen Daten- und Returnstack, deren Gr<47><72>e beim Einrichten der
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6 Task angegeben werden mu<6D>.
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7
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8 Mit MULTITASK wird der Tasker eingeschaltet, mit SINGLETASK
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9 abgeschaltet. Mit TASKS kann man die Tasks im System und
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10 ihren Zustand anzeigen.
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11
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12 N<>heres zur Funktionsweise des Taskers findet man im Handbuch,
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13 ebenso wie ein ausf<73>hrliches Glossar !
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14
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15
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0 \ Multitasker Loadscreen 22nov86bp
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1
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2 Onlyforth
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3
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4 \needs Code 2 loadfrom assemble.scr
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5 \needs multitask 1 +load
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6
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7 02 05 +thru \ Tasker
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8 06 +load \ Spooler
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9
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11
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12
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13
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14
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15
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0 \ stop singletask multitask 14sep86we
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1
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2 Code stop
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3 .l FP IP suba .w IP SP -) move
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4 .l FP RP suba .w RP SP -) move
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5 UP R#) D6 move D6 reg) A0 lea
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6 .l FP SP suba .w SP 8 A0 D) move
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7 2 A0 D) D6 move D6 reg) jmp end-code
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8
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9 Label taskpause
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10 UP R#) D6 move D6 reg) A0 lea $4E43 # A0 ) move
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11 Forth ' stop @ Assembler bra end-code
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12
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13 : singletask [ ' pause @ ] Literal ['] pause ! ;
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14
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15 : multitask taskpause ['] pause ! ;
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Screen 3 not modified
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0 \ pass activate bp 12oct86
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1
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2 | : (pass ( n0 ... nm-1 Taskaddr m -- )
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3 rdrop swap \ delete IP of ACTIVATE or PASS
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4 $4E43 over ! \ awake Task
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5 r> -rot \ get the IP; Stack: IP m Taskaddr
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6 &10 + >r \ push s0 of Task
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7 r@ 2+ @ swap \ Stack-Top: IP r0 m
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8 2+ 2* \ bytes on Taskstack incl. r0 & IP
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9 r@ @ over - \ new SP
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10 dup r> 2- ! \ into Ssave
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11 swap bounds ?DO I ! 2 +LOOP ;
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12
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13 : activate ( Taddr -- ) 0 (pass ; restrict
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14
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15 : pass ( n0 ... nm-1 Taskaddr m ) (pass ; restrict
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Screen 4 not modified
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0 \ sleep wake taskerror bp 12oct86
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1
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2 : sleep ( Taddr -- ) $3C3C swap ! ; \ # D6 move opcode
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3 : wake ( Taddr -- ) $4E43 swap ! ; \ Trap 3 opcode
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4
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5 | : taskerror ( string -- )
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6 standardi/o singletask bell
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7 at? &24 0 at ." Task error : " rot count type at
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8 multitask stop ;
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12
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14
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0 \ Task 14sep86we
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1
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2 : Task ( rlen slen -- )
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3 2 arguments
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4 0 Constant here >r \ Task-dp
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5 even dup r@ + r@ 2- ! allot even \ 68000 align
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6 up@ here 100 cmove \ init user area
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7 here $3C3C , up@ 2+ @ , \ JMP opcode to sleep task
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8 $4EF3 , $6800 ,
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9 dup up@ 2+ ! \ link task
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10 dup 6 - dup , , \ ssave and s0
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11 2dup + , \ here + rlen = r0
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12 r@ , \ dp
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13 under + here - allot 0 ,
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14 ['] taskerror swap [ ' errorhandler >body c@ ] Literal + !
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15 r> 2- 2- , ;
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Screen 6 not modified
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0 \ rendezvous 's tasks 22nov86bp
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1
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2 : rendezvous ( semaphoraddr -- )
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3 dup unlock pause lock ;
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4
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5 | : statesmart state @ IF [compile] Literal THEN ;
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6
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7 : 's ( Taddr -- adr ) \ adr is adress of the foll. uservar
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8 ' >body c@ + statesmart ; immediate
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9
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10 : tasks ( -- )
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11 cr ." Main " up@ dup 2+ @
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12 BEGIN 2dup - WHILE cr dup [ ' r0 >body c@ ] Literal + @
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13 2+ @ >name .name
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14 dup @ $3C3C = IF ." sleeping" THEN
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15 2+ @ REPEAT 2drop ;
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Screen 7 not modified
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0 \ Printerspool 21oct86we
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1
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2 $100 $200 Task spooler
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3
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4 : spool' ( -- ) \ reads word
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5 ' isfile@ offset @ base @ spooler depth 1- 6 min pass
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6 base ! offset ! isfile ! execute
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7 true abort" SPOOL' ready for next job!" stop ;
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8
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9 \\ syntax:
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10 spool' listing
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11 spool' printall
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12 from to spool' pthru
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13 from to spool' document
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