Re: [Chicken-users] Finalizers

[felix winkelmann]

On 6/20/06, John Cowan <address@hidden> wrote:
> Either I seriously don't understand finalizers or else they don't
> work in simple cases.  Here's a log:
>
> Version 2, Build 320 - windows-cygwin-x86 - [ dload ptables applyhook ]
> (c)2000-2006 Felix L. Winkelmann
> #;1> (define x '(1 2 3))
> #;2> (define (yammer x) (print x " is dead"))
> #;3> (set-finalizer! x yammer)
> (1 2 3)
> #;4> (gc #t)
> 157812
> #;5> (define x #f)
> #;6> (gc #t)
> 157812
> #;7>
>
> Why is nothing reclaimed, and why isn't "(1 2 3) is dead" printed?

The literal list is held in the interpreter history, because it is the
result value of the set-finalizer! call. Running this in a normal
program will work fine.


cheers,
felix