60 lines
1.5 KiB
Factor
Executable File
60 lines
1.5 KiB
Factor
Executable File
! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: concurrency.futures concurrency.count-downs sequences
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kernel macros fry combinators generalizations ;
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IN: concurrency.combinators
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<PRIVATE
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: (parallel-each) ( n quot -- )
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[ <count-down> ] dip keep await ; inline
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PRIVATE>
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: parallel-each ( seq quot -- )
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over length [
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'[ _ curry _ spawn-stage ] each
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] (parallel-each) ; inline
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: 2parallel-each ( seq1 seq2 quot -- )
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2over min-length [
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'[ _ 2curry _ spawn-stage ] 2each
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] (parallel-each) ; inline
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: parallel-filter ( seq quot -- newseq )
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over [ pusher [ parallel-each ] dip ] dip like ; inline
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<PRIVATE
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: [future] ( quot -- quot' ) '[ _ curry future ] ; inline
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: future-values ( futures -- futures )
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dup [ ?future ] change-each ; inline
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PRIVATE>
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: parallel-map ( seq quot -- newseq )
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[future] map future-values ; inline
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: 2parallel-map ( seq1 seq2 quot -- newseq )
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'[ _ 2curry future ] 2map future-values ;
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<PRIVATE
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: (parallel-spread) ( n -- spread-array )
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[ ?future ] <repetition> ; inline
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: (parallel-cleave) ( quots -- quot-array spread-array )
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[ [future] ] map dup length (parallel-spread) ; inline
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PRIVATE>
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MACRO: parallel-cleave ( quots -- )
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(parallel-cleave) '[ _ cleave _ spread ] ;
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MACRO: parallel-spread ( quots -- )
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(parallel-cleave) '[ _ spread _ spread ] ;
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MACRO: parallel-napply ( quot n -- )
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[ [future] ] dip dup (parallel-spread) '[ _ _ napply _ spread ] ;
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