72 lines
1.7 KiB
Factor
Executable File
72 lines
1.7 KiB
Factor
Executable File
! 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 init hashtables heaps io.backend kernel
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kernel.private math namespaces sequences vectors io system
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continuations debugger dlists ;
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<PRIVATE
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SYMBOL: sleep-queue
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: sleep-time ( -- ms )
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sleep-queue get-global dup heap-empty?
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[ drop 1000 ] [ heap-peek nip millis [-] ] if ;
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: run-queue ( -- queue ) \ run-queue get-global ;
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: schedule-sleep ( continuation ms -- )
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sleep-queue get-global heap-push ;
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: wake-up ( -- continuation )
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sleep-queue get-global heap-pop drop ;
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PRIVATE>
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: schedule-thread ( continuation -- )
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run-queue push-front ;
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: schedule-thread-with ( obj continuation -- )
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2array schedule-thread ;
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: stop ( -- )
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walker-hook [
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continue
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] [
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run-queue pop-back 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 -- )
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>fixnum millis + [ schedule-sleep stop ] curry callcc0 ;
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: in-thread ( quot -- )
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[
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>r schedule-thread r> [
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V{ } set-catchstack
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{ } set-retainstack
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[ [ print-error ] recover stop ] call-clear
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] 1 (throw)
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] curry callcc0 ;
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<PRIVATE
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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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run-queue dlist-empty? (idle-thread) yield idle-thread ;
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: init-threads ( -- )
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<dlist> \ run-queue set-global
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<min-heap> sleep-queue set-global
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[ idle-thread ] in-thread ;
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[ init-threads ] "threads" add-init-hook
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PRIVATE>
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