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⟦8e1b2eaf8⟧ Wang Wps File
Length: 5409 (0x1521)
Types: Wang Wps File
Notes: TJG forel`sning billeder
Names: »4223A «
Derivation
└─⟦2939611b6⟧ Bits:30006177 8" Wang WCS floppy, CR 0350A
└─ ⟦this⟧ »4223A «
WangText
9 9…05…9…06…8…08…8…09…8…0b…8…0c…8…0e……86…1
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SYSTEMPROGRAMMERING
SYSTEMPROGRAMMERING: korutiner,
processer, proceskommunikation.
1̲.̲ ̲S̲Y̲S̲T̲E̲M̲P̲R̲O̲G̲R̲A̲M̲M̲E̲R̲I̲N̲G̲.̲
Grundbegreber:
2̲.̲ ̲I̲M̲P̲L̲E̲M̲E̲N̲T̲E̲R̲I̲N̲G̲ ̲A̲F̲ ̲M̲U̲L̲T̲I̲P̲R̲O̲G̲R̲A̲M̲M̲E̲R̲.̲
P̲r̲o̲c̲e̲s̲s̲a̲m̲a̲r̲b̲e̲j̲d̲e̲:̲
3̲.̲ ̲N̲O̲T̲A̲T̲I̲O̲N̲ ̲T̲I̲L̲ ̲B̲E̲S̲K̲R̲I̲V̲E̲L̲S̲E̲ ̲A̲F̲ ̲M̲U̲L̲T̲I̲P̲R̲O̲G̲R̲A̲M̲M̲E̲R̲:̲
4̲.̲ ̲"̲M̲E̲S̲S̲A̲G̲E̲ ̲P̲A̲S̲S̲I̲N̲G̲"̲ ̲-̲ ̲B̲E̲S̲K̲E̲D̲U̲D̲V̲E̲K̲S̲L̲I̲N̲G̲.̲
DIREKTE NAVNGIVNING GLOBALE NAVNE
SYNKRONISERINGSELEMENTER
5̲.̲ ̲S̲E̲M̲A̲F̲O̲R̲E̲R̲.̲
wait/signal send/receive
generelle semaforer besked semaforer
CENTRALLOGIK
READY ̲LIST CURRENT ̲PROCES
SELECT ̲CANDIDATE
G̲E̲N̲E̲R̲E̲L̲L̲E̲ ̲S̲E̲M̲A̲F̲O̲R̲E̲R̲
6̲.̲ ̲G̲E̲N̲E̲R̲E̲L̲L̲E̲ ̲S̲E̲M̲A̲F̲O̲R̲E̲R̲ ̲-̲ ̲w̲a̲i̲t̲/̲s̲i̲g̲n̲a̲l̲.̲
7̲.̲ ̲B̲E̲S̲K̲E̲D̲S̲E̲M̲A̲F̲O̲R̲E̲R̲.̲
8̲.̲ ̲B̲E̲S̲K̲E̲D̲S̲E̲M̲A̲F̲O̲R̲E̲R̲ ̲-̲ ̲s̲e̲n̲d̲/̲r̲e̲c̲e̲i̲v̲e̲.̲
9̲.̲ ̲B̲E̲S̲K̲E̲D̲U̲D̲V̲E̲K̲S̲L̲I̲N̲G̲ ̲V̲I̲A̲ ̲G̲L̲O̲B̲A̲L̲E̲ ̲N̲A̲V̲N̲E̲.̲
1̲0̲.̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲R̲.̲
resume operation
korutinesystem med simple/beskedsemaforer
bufferpuljer
1̲1̲.̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲E̲K̲S̲E̲M̲P̲E̲L̲.̲
struktur:
korutineeksempler
1̲2̲.̲ ̲U̲D̲V̲I̲D̲E̲T̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲E̲K̲S̲E̲M̲P̲E̲L̲.̲
drivprogrammer
1̲3̲.̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲M̲O̲N̲I̲T̲O̲R̲.̲
1̲4̲.̲ ̲P̲R̲O̲C̲E̲S̲S̲E̲R̲.̲
implementeres af operativsystemkerne:
procesbeskrivelse:
tilstand,
context ̲storage,
diverse datastrukturer
process manager:
]vrige kernefunktioner:
tidstro egenskaber:
prioritering af processer,
speciel procesafvikling,
hurtig signalering,
hurtig behandling af afbrydelser.
1̲5̲.̲ ̲O̲P̲E̲R̲A̲T̲I̲V̲S̲Y̲S̲T̲E̲M̲ ̲H̲I̲E̲R̲A̲R̲K̲I̲.̲
vigtigste forskelle mellem korutiner og processer
1̲6̲.̲ ̲P̲R̲O̲C̲E̲S̲K̲O̲M̲M̲U̲N̲I̲K̲A̲T̲I̲O̲N̲.̲
beskedudveksling via globale navne,
message/answer beskeder
begr`nsninger ved beskedudveksling:
* sm> beskeder
* kopiering af indholdet
eksempel p> mere avanceret kommunikation
f`lles lagersegment
1̲7̲.̲ ̲P̲R̲O̲C̲E̲S̲S̲E̲R̲ ̲O̲G̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲R̲.̲
1̲8̲.̲ ̲K̲O̲R̲U̲T̲I̲N̲E̲R̲ ̲I̲N̲D̲E̲N̲ ̲F̲O̲R̲ ̲P̲R̲O̲C̲E̲S̲S̲E̲R̲.̲
ventepunkter
korutinemonitor : interne og externe begivenheder
anvendelser:
serviceprocesser med mange ventepunkter
