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\\ *** Multitasker *** bp 12oct86 Dieses File enth„lt die Worte f<>r das Multitasking. Mit TASK werden Tasks eingerichtet. Jede Task hat ihren eige- nen Daten- und Returnstack, deren Gr”že beim Einrichten der Task angegeben werden muž. Mit MULTITASK wird der Tasker eingeschaltet, mit SINGLETASK abgeschaltet. Mit TASKS kann man die Tasks im System und ihren Zustand anzeigen. N„heres zur Funktionsweise des Taskers findet man im Handbuch, ebenso wie ein ausf<73>hrliches Glossar ! \ Multitasker Loadscreen 22nov86bp Onlyforth \needs Code 2 loadfrom assemble.scr \needs multitask 1 +load 02 05 +thru \ Tasker 06 +load \ Spooler \ stop singletask multitask 14sep86we Code stop .l FP IP suba .w IP SP -) move .l FP RP suba .w RP SP -) move UP R#) D6 move D6 reg) A0 lea .l FP SP suba .w SP 8 A0 D) move 2 A0 D) D6 move D6 reg) jmp end-code Label taskpause UP R#) D6 move D6 reg) A0 lea $4E43 # A0 ) move Forth ' stop @ Assembler bra end-code : singletask [ ' pause @ ] Literal ['] pause ! ; : multitask taskpause ['] pause ! ; \ pass activate bp 12oct86 | : (pass ( n0 ... nm-1 Taskaddr m -- ) rdrop swap \ delete IP of ACTIVATE or PASS $4E43 over ! \ awake Task r> -rot \ get the IP; Stack: IP m Taskaddr &10 + >r \ push s0 of Task r@ 2+ @ swap \ Stack-Top: IP r0 m 2+ 2* \ bytes on Taskstack incl. r0 & IP r@ @ over - \ new SP dup r> 2- ! \ into Ssave swap bounds ?DO I ! 2 +LOOP ; : activate ( Taddr -- ) 0 (pass ; restrict : pass ( n0 ... nm-1 Taskaddr m ) (pass ; restrict \ sleep wake taskerror bp 12oct86 : sleep ( Taddr -- ) $3C3C swap ! ; \ # D6 move opcode : wake ( Taddr -- ) $4E43 swap ! ; \ Trap 3 opcode | : taskerror ( string -- ) standardi/o singletask bell at? &24 0 at ." Task error : " rot count type at multitask stop ; \ Task 14sep86we : Task ( rlen slen -- ) 2 arguments 0 Constant here >r \ Task-dp even dup r@ + r@ 2- ! allot even \ 68000 align up@ here 100 cmove \ init user area here $3C3C , up@ 2+ @ , \ JMP opcode to sleep task $4EF3 , $6800 , dup up@ 2+ ! \ link task dup 6 - dup , , \ ssave and s0 2dup + , \ here + rlen = r0 r@ , \ dp under + here - allot 0 , ['] taskerror swap [ ' errorhandler >body c@ ] Literal + ! r> 2- 2- , ; \ rendezvous 's tasks 22nov86bp : rendezvous ( semaphoraddr -- ) dup unlock pause lock ; | : statesmart state @ IF [compile] Literal THEN ; : 's ( Taddr -- adr ) \ adr is adress of the foll. uservar ' >body c@ + statesmart ; immediate : tasks ( -- ) cr ." Main " up@ dup 2+ @ BEGIN 2dup - WHILE cr dup [ ' r0 >body c@ ] Literal + @ 2+ @ >name .name dup @ $3C3C = IF ." sleeping" THEN 2+ @ REPEAT 2drop ; \ Printerspool 21oct86we $100 $200 Task spooler : spool' ( -- ) \ reads word ' isfile@ offset @ base @ spooler depth 1- 6 min pass base ! offset ! isfile ! execute true abort" SPOOL' ready for next job!" stop ; \\ syntax: spool' listing spool' printall from to spool' pthru from to spool' document |