From: Yukihiro Matsumoto <matz@...>
Date: 2009-10-26T07:02:28+09:00
Subject: Re: Using id2ref for anything?

Hi,

In message "Re: Using id2ref for anything?"
    on Mon, 26 Oct 2009 05:41:52 +0900, Charles Oliver Nutter <headius@headius.com> writes:

|ObjectSpace._id2ref is another of those peculiar methods, an artifact
|of a particular implementation which, due to its lack of a
|copying/compacting garbage collector, can always locate in memory an
|object given its "id". This is typically *not* easily possible on
|other VMs, where objects move around and it may even be difficult to
|get a unique "id" for a given object since memory locations keep
|moving and adding a numeric ID would increase object or object handle
|sizes.

Originally, _id2ref is an implementation dependent hack for weakref,
so that you can remove it, if you can provide the better way.

							matz.