21 lines
581 B
Factor
Executable File
21 lines
581 B
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: dlists kernel threads concurrency.conditions accessors ;
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IN: concurrency.flags
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TUPLE: flag value threads ;
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: <flag> ( -- flag ) f <dlist> flag boa ;
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: raise-flag ( flag -- )
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dup value>> [ drop ] [ t >>value threads>> notify-all ] if ;
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: wait-for-flag-timeout ( flag timeout -- )
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over value>> [ 2drop ] [ >r threads>> r> "flag" wait ] if ;
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: wait-for-flag ( flag -- )
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f wait-for-flag-timeout ;
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: lower-flag ( flag -- )
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[ wait-for-flag ] [ f >>value drop ] bi ;
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