Re: Weak pointers

From: Kohler Markus (kohlerm@betze.bbn.hp.com)
Date: Tue Mar 18 1997 - 08:43:49 MET

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Message-Id: <199703180743.IAA22036@betze.bbn.hp.com>
To: caml-list@pauillac.inria.fr
Subject: Re: Weak pointers
Date: Tue, 18 Mar 1997 07:43:49 +0000
From: Kohler Markus <kohlerm@betze.bbn.hp.com>

I didn't take a look at Java's weak pointers, but I assume it's same as in
Smalltalk.

In Smalltalk a weak pointer is not counted when the garbage checks if the
object is still referenced. That means if you have only weak pointers to an
object and the application needs memory it will be garbage collected.

In Smalltalk theres is a correspinding concept called "finalization".
If a weak object is garbage collected a finalize message is called.
This is used in Smalltalk to free external resources like windows.

Markus

-- 
+----------------------------------------------------------------------------+
| Markus Kohler                          Hewlett-Packard GmbH                |
| Software Engineer                      Network & System Management Division| 
|                                        IT/E Success Team                   |
+----------------------------------------------------------------------------+

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