User:NevilleDNZ/ALGOL 68: Difference between revisions

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par: Parallel processing

ALGOL 68 supports programming of parallel processing. Using the keyword par, a collateral clause is converted to a parallel clause, where the synchronisation of actions is controlled using semaphores. In A68G the parallel actions are mapped to threads when available on the hosting operating system. In A68S a different paradigm of parallel processing was implemented (see below).

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TEST Test test
TEST Test test

PROC
    eat = VOID: ( muffins-:=1; print(("Yum!",new line))),
    speak = VOID: ( words-:=1; print(("Yak...",new line)));
 
INT muffins := 4, words := 8;
SEMA mouth = LEVEL 1;
 
PAR BEGIN
    WHILE muffins > 0 DO
        DOWN mouth;
        eat;
        UP mouth
    OD,
    WHILE words > 0 DO
        DOWN mouth;
        speak;
        UP mouth
    OD
END

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  '''PROC'''