1 ! Copyright (C) 2005, 2006 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
4 USING: hashtables kernel math namespaces sequences ;
6 TUPLE: timer object delay last ;
8 C: timer ( object delay -- timer )
9 [ set-timer-delay ] keep
10 [ set-timer-object ] keep
11 millis over set-timer-last ;
13 GENERIC: tick ( ms object -- )
15 : timers \ timers get-global ;
17 : init-timers ( -- ) H{ } clone \ timers set-global ;
19 : add-timer ( object delay -- )
20 over >r <timer> r> timers set-hash ;
22 : remove-timer ( object -- ) timers remove-hash ;
24 : next-time ( timer -- ms ) dup timer-delay swap timer-last + ;
26 : advance-timer ( ms timer -- delay )
27 [ timer-last [-] ] 2keep set-timer-last ;
29 : do-timer ( ms timer -- )
31 [ [ advance-timer ] keep timer-object tick ] [ 2drop ] if ;
34 millis timers hash-values [ do-timer ] each-with ;