From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII
X-Google-Thread: 103376,a6c65cbc407987fe
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-11-18 10:58:52 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsfeed1.bredband.com!bredband!uio.no!ntnu.no!not-for-mail
From: Preben Randhol <randhol+news@pvv.org>
Newsgroups: comp.lang.ada
Subject: Re: dynamic multithreading
Date: Mon, 18 Nov 2002 18:58:51 +0000 (UTC)
Organization: Norwegian university of science and technology
Message-ID: <slrnatie2m.22q.randhol+news@kiuk0152.chembio.ntnu.no>
References: <ar07km$u72$1@news.lucky.net>
 <CbOA9.153$Y04.251@nntpserver.swip.net> <3DD3D841.CD16A4CB@canal-plus.fr>
 <8MCB9.8643$8o1.1371873@news.xtra.co.nz> <3DD8AEAC.241AD1F8@canal-plus.fr>
 <uolhtu8ufkh0373q4do8u7j9vidamftis6@4ax.com> <uzns6etrx.fsf@wanadoo.fr>
 <slrnati535.om.lutz@taranis.iks-jena.de>
 <slrnati585.lh.randhol+news@kiuk0152.chembio.ntnu.no>
 <slrnati5cf.om.lutz@taranis.iks-jena.de>
 <slrnati5mf.lh.randhol+news@kiuk0152.chembio.ntnu.no>
 <slrnati66h.om.lutz@taranis.iks-jena.de>
NNTP-Posting-Host: kiuk0152.chembio.ntnu.no
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: tyfon.itea.ntnu.no 1037645931 15447 129.241.83.78 (18 Nov 2002
 18:58:51 GMT)
X-Complaints-To: usenet@itea.ntnu.no
NNTP-Posting-Date: Mon, 18 Nov 2002 18:58:51 +0000 (UTC)
User-Agent: slrn/0.9.7.4 (Linux)
Xref: archiver1.google.com comp.lang.ada:31062
Date: 2002-11-18T18:58:51+00:00
List-Id: <comp.lang.ada>

Lutz Donnerhacke wrote:
>> But it doesn't make sense, because you can have two access variables.
> 
> The current variables can be ignored. I write only about the type of them.
> 
>> If the inner variable goes out of scope it should not free up the rest of
>> the objects.
> 
>   declare
>      type A_Access is access A;
>      a : A_Access := new A;        -- Instance 1.
>   begin
>      a := new A;                   -- Instance 2: Leaks memory (Instance 1)
>      declare
>        b : A_Access := a;
>      begin
>        b := new A;                 -- Instance 3.
>        a := b;                     -- Leaks memory (Instance 2)
>      end;
>   end;                             -- Frees all three instances.

Well try this:

declare
   type A_Access is access A;
   a : A_Access := new A;        -- Instance 1.
begin
   loop
      a := new A;                   -- Instance 2: Leaks memory (Instance 1)
      declare
        b : A_Access := a;
      begin
        b := new A;                 -- Instance 3.
        a := b;                     -- Leaks memory (Instance 2)
      end;
   end loop;
end;                             -- Frees all three instances.

-- 
Preben Randhol ------------------------ http://www.pvv.org/~randhol/ --
�There are three things you can do to a woman. You can love her, suffer
 for her, or turn her into literature.�  - Justine, by Lawrence Durrell