1 ! Copyright (C) 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel assocs math accessors destructors fry ;
8 GENERIC: age ( obj -- )
10 M: object age [ 1+ ] change-age drop ;
12 TUPLE: cache-assoc assoc max-age disposed ;
14 : <cache-assoc> ( -- cache )
15 H{ } clone 10 f cache-assoc boa ;
17 M: cache-assoc assoc-size assoc>> assoc-size ;
19 M: cache-assoc at* assoc>> at* [ dup [ 0 >>age ] when ] dip ;
21 M: cache-assoc set-at dup check-disposed assoc>> set-at ;
23 M: cache-assoc clear-assoc assoc>> clear-assoc ;
25 M: cache-assoc >alist assoc>> >alist ;
27 INSTANCE: cache-assoc assoc
29 : purge-cache ( cache -- )
31 [ nip dup age age>> _ >= ] assoc-partition
32 [ values dispose-each ] dip
35 M: cache-assoc dispose*
36 assoc>> [ values dispose-each ] [ clear-assoc ] bi ;