From: Robert Klemme <bob.news@...>
Date: 2005-04-13T20:54:42+09:00
Subject: Re: ability to run finalizers at a given point of a program?


"ts" <decoux@moulon.inra.fr> schrieb im Newsbeitrag
news:200504131121.j3DBLwDA001100@moulon.inra.fr...
> >>>>> "G" == Guillaume Cottenceau <gcottenc@gmail.com> writes:
>
> G> After a second thought, I then think that it reduces a lot the use of
> G> the finalizer, because it means that it cannot do anything related to
> G> the instance of the object being destroyed,

Not necessarily: you can keep a reference to a member instance that needs
cleanup.  Also, the finalizer receives the oid which you can use for
bookkeeping purposes.

>  This is worst that you think
>
> svg% cat b.rb
> #!/usr/local/bin/ruby
> obj = []
> ObjectSpace.define_finalizer(obj, proc { p "before"; p obj; p "after" })
> svg%
>
> svg% b.rb
> "before"
> svg%

Interesting.  IMHO the finalizer should not be called in the first place
as it retains a ref to "obj".

    robert