From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: memory management in Ada: tedious without GC?
Date: Fri, 23 May 2008 19:03:28 -0400
Date: 2008-05-23T19:03:28-04:00 [thread overview]
Message-ID: <wccwslkd3nj.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: 5184e351-1971-484c-a74b-16156544ec00@x41g2000hsb.googlegroups.com
Matthew Heaney <mheaney@on2.com> writes:
> On May 19, 4:35�am, Maciej Sobczak <see.my.homep...@gmail.com> wrote:
>>
>> How would you use this strategy to make a controlled stream (derived
>> from Root_Stream_Type)?
>
> package P is
> type T is new Root_Stream_Type with private;
> procedure Op (O : not null access T); -- or whatever
> private
> type Control_Type (O : not null access T) is
> new Limited_Controlled with null record;
>
> -- override Init and Final as req'd
>
> type T is new Root_Stream_Type with record
> Control : Control_Type (T'Access);
> -- other components as req'd
> end record;
> end P;
Yes, but this idiom is needed only when the Finalize of the derived type
needs to do something with the components of the parent type. I think
that's unusual. The more common thing is to extend a type with some
controlled components -- each component cleans up itself. So you don't
normally need that pointer-to-containing-object.
By the way, O is a horrible name!
- Bob
next prev parent reply other threads:[~2008-05-23 23:03 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 17:44 memory management in Ada: tedious without GC? jhc0033
2008-05-16 18:56 ` Ludovic Brenta
2008-05-16 20:42 ` Maciej Sobczak
2008-05-16 21:45 ` Ivan Levashew
2008-05-16 22:59 ` Peter C. Chapin
2008-05-17 5:24 ` jhc0033
2008-05-17 7:50 ` Ivan Levashew
2008-05-16 23:05 ` Randy Brukardt
2008-05-19 3:50 ` Matthew Heaney
2008-05-19 7:55 ` Dmitry A. Kazakov
2008-05-19 13:18 ` Georg Bauhaus
2008-05-19 14:16 ` Dmitry A. Kazakov
2008-05-23 23:15 ` Robert A Duff
2008-05-24 0:45 ` Randy Brukardt
2008-05-24 8:25 ` Dmitry A. Kazakov
2008-05-24 16:14 ` Robert A Duff
2008-05-24 19:04 ` Dmitry A. Kazakov
2008-05-24 20:52 ` Robert A Duff
2008-05-25 8:12 ` Dmitry A. Kazakov
2008-05-25 11:28 ` Maciej Sobczak
2008-05-25 12:35 ` Robert A Duff
2008-05-26 8:16 ` Dmitry A. Kazakov
2008-05-24 19:39 ` Georg Bauhaus
2008-05-24 20:45 ` Robert A Duff
2008-05-19 8:35 ` Maciej Sobczak
2008-05-19 15:11 ` Matthew Heaney
2008-05-19 21:13 ` Maciej Sobczak
2008-05-23 23:03 ` Robert A Duff [this message]
2008-05-24 0:12 ` Adam Beneschan
2008-05-16 22:45 ` anon
2008-05-17 7:34 ` Pascal Obry
2008-05-17 15:11 ` Bob Klungle
2008-05-17 15:27 ` Pascal Obry
2008-05-17 16:18 ` Georg Bauhaus
2008-05-20 8:04 ` Ole-Hjalmar Kristensen
2008-05-20 8:01 ` Ole-Hjalmar Kristensen
2008-05-20 10:03 ` Martin Krischik
2008-05-17 17:23 ` Martin Krischik
2008-05-17 16:51 ` Maciej Sobczak
2008-05-17 17:45 ` Pascal Obry
2008-05-17 22:28 ` Samuel Tardieu
2008-05-18 7:03 ` Martin Krischik
2008-05-18 8:50 ` jhc0033
2008-05-18 9:31 ` Dmitry A. Kazakov
2008-05-18 14:10 ` Maciej Sobczak
2008-05-18 14:59 ` Dmitry A. Kazakov
2008-05-18 20:51 ` Maciej Sobczak
2008-05-19 8:36 ` Dmitry A. Kazakov
2008-05-18 15:03 ` Martin Krischik
2008-05-18 18:27 ` jhc0033
2008-05-19 4:12 ` Matthew Heaney
2008-05-19 8:39 ` Maciej Sobczak
2008-05-19 15:37 ` Matthew Heaney
2008-05-19 21:21 ` Maciej Sobczak
2008-05-19 23:02 ` Matthew Heaney
2008-05-19 10:27 ` Martin Krischik
2008-05-17 22:42 ` Peter C. Chapin
2008-05-18 6:58 ` Martin Krischik
2008-05-18 6:52 ` Martin Krischik
2008-05-18 14:16 ` Maciej Sobczak
2008-05-17 14:30 ` Brian Drummond
2008-05-17 16:47 ` Maciej Sobczak
2008-05-19 14:45 ` Brian Drummond
2008-05-20 7:42 ` Maciej Sobczak
2008-05-20 18:01 ` jayessay
2008-05-18 8:06 ` Simon Wright
2008-05-18 14:21 ` Maciej Sobczak
2008-05-18 20:48 ` Simon Wright
2008-05-19 14:40 ` Brian Drummond
2008-05-19 3:44 ` Matthew Heaney
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