[Python-Dev] Making weakref callbacks safe in cyclic gc

[Neil Schemenauer]

On Tue, Nov 18, 2003 at 02:21:45PM +1300, Greg Ewing wrote:
> I remember reading once about the finalization scheme used in a
> particular Smalltalk implementation (I think it was ParcPlace) in
> which an object requiring finalization registers another object to be
> notified after it has died.

I think that may be called "guardians".

  Neil