72 lines
1.7 KiB
Factor
72 lines
1.7 KiB
Factor
! Copyright (C) 2004, 2007 Slava Pestov.
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! Copyright (C) 2005 Mackenzie Straight.
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! See http://factorcode.org/license.txt for BSD license.
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IN: threads
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USING: arrays errors hashtables io-internals kernel math
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namespaces queues sequences vectors ;
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! Co-operative multitasker.
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: run-queue ( -- queue ) \ run-queue get-global ;
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: schedule-thread ( continuation -- ) run-queue enque ;
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: schedule-thread-with ( obj continuation -- )
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2array schedule-thread ;
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SYMBOL: sleep-queue
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: sleep-time ( -- ms )
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sleep-queue get-global
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dup empty? [ drop 1000 ] [ first first millis [-] ] if ;
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: stop ( -- )
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walker-hook [
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f swap continue-with
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] [
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run-queue deque dup array?
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[ first2 continue-with ] [ continue ] if
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] if* ;
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: yield ( -- ) [ schedule-thread stop ] callcc0 ;
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: (sleep) ( ms continuation -- )
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2array global [
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sleep-queue [ swap add sort-keys ] change
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] bind ;
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: wake-up ( -- continuation )
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global [
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sleep-queue [ unclip second swap ] change
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] bind ;
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: sleep ( ms -- )
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>fixnum millis + [ (sleep) stop ] callcc0 drop ;
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: in-thread ( quot -- )
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[
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schedule-thread
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V{ } set-catchstack
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V{ } set-callstack
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V{ } set-retainstack
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[ print-error ] recover
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stop
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] callcc0 drop ;
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IN: kernel-internals
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: (idle-thread) ( slow? -- )
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sleep-time dup zero?
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[ wake-up schedule-thread 2drop ]
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[ 0 ? io-multiplex ] if ;
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: idle-thread ( -- )
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#! This thread is always running.
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#! If run queue is not empty, we don't sleep.
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run-queue queue-empty? (idle-thread) yield idle-thread ;
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: init-threads ( -- )
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<queue> \ run-queue set-global
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f sleep-queue set-global
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[ idle-thread ] in-thread ;
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