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From: AdaMagica <christoph.grein@eurocopter.com>
Newsgroups: comp.lang.ada
Subject: Safe Pointers
Date: Wed, 30 Dec 2009 09:49:11 -0800 (PST)
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Safe Pointers provide a reference counting facility to deal with
access types without compromizing safety, i.e. safe pointers clean up
behind themselves properly; no dangling references can ever be
produced.
Ada 95 and Ada 2005 differ enough so that two versions exist. A new
Ada 2005 version is ready:

http://www.christ-usch-grein.homepage.t-online.de/Ada/Safe_Pointers.html