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Re: [Chicken-users] Finalizers

From: felix winkelmann
Subject: Re: [Chicken-users] Finalizers
Date: Tue, 20 Jun 2006 15:42:48 +0200

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)
#;5> (define x #f)
#;6> (gc #t)

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.


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