From: mheaney@on2.com (Matthew Heaney)
Subject: Re: dynamic multithreading
Date: 20 Nov 2002 10:20:11 -0800
Date: 2002-11-20T18:20:11+00:00 [thread overview]
Message-ID: <1ec946d1.0211201020.1b031056@posting.google.com> (raw)
In-Reply-To: mailman.1037689022.2833.comp.lang.ada@ada.eu.org
"Grein, Christoph" <christoph.grein@eurocopter.com> wrote in message news:<mailman.1037689022.2833.comp.lang.ada@ada.eu.org>...
> > http://www.adapower.com/alg/smartp.html
>
> There is another implementation of referece counted pointers, Safe_Pointers, in my home
> page. This has been published in Ada Letters some years ago.
>
> See http://home.T-Online.de/home/Christ-Usch.Grein/Ada/
The package Charles.Access_Control provides an abstraction very
similar to an auto_ptr in C++.
The idea is that someone always "owns" a pointer, and it's up to the
owner to Free the object.
In the case of Access_Control, the Pointer_Type can be used as an
owner, presumably in a temporary scope. This means that no matter how
you exit the scope (say, an unhandled exception), you have a guarantee
that the memory get free'd.
For example:
function Factory_Function return T_Access is
Pointer : T_Access_Control.Pointer_Type;
begin
Initialize (Pointer, new T);
--do some stuff that might raise an exception, etc
--ok, we're all done, transfer ownership to caller
return Release (Pointer);
end Factory_Function;
I put up a new version (20021119) of Charles last night (I added a
bounded vector container, and generalized the Access_Control package):
http://home.earthlink.net/~matthewjheaney/charles/index.html
next prev parent reply other threads:[~2002-11-20 18:20 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-19 6:49 dynamic multithreading Grein, Christoph
2002-11-20 18:20 ` Matthew Heaney [this message]
2002-11-27 15:55 ` John English
-- strict thread matches above, loose matches on Subject: below --
2002-11-19 6:46 Grein, Christoph
2002-11-19 6:38 Grein, Christoph
2002-11-19 9:13 ` Lutz Donnerhacke
2002-11-19 5:28 Grein, Christoph
2002-11-18 12:13 Grein, Christoph
2002-11-18 13:38 ` Dmitry A. Kazakov
2002-11-18 9:22 Grein, Christoph
2002-11-18 12:25 ` Thierry Lelegard
2002-11-18 13:32 ` Dmitry A. Kazakov
2002-11-18 16:20 ` Pascal Obry
2002-11-14 13:12 Artiom Ivanov
2002-11-14 13:49 ` David Marceau
2002-11-14 14:14 ` Björn Lundin
2002-11-14 17:07 ` Thierry Lelegard
2002-11-14 18:59 ` tmoran
2002-11-14 22:04 ` Robert A Duff
2002-11-15 9:27 ` Jean-Pierre Rosen
2002-11-17 23:02 ` AG
2002-11-17 5:17 ` tmoran
2002-11-17 12:40 ` Simon Wright
2002-11-18 9:11 ` Thierry Lelegard
2002-11-18 12:12 ` Dmitry A. Kazakov
2002-11-18 16:18 ` Pascal Obry
2002-11-18 16:25 ` Lutz Donnerhacke
2002-11-18 16:21 ` Simon Wright
2002-11-19 9:03 ` Lutz Donnerhacke
2002-11-19 21:41 ` Simon Wright
2002-11-18 16:28 ` Preben Randhol
2002-11-18 16:30 ` Lutz Donnerhacke
2002-11-18 16:35 ` Preben Randhol
2002-11-18 16:44 ` Lutz Donnerhacke
2002-11-18 18:58 ` Preben Randhol
2002-11-19 9:09 ` Lutz Donnerhacke
2002-11-18 19:00 ` Preben Randhol
2002-11-19 9:11 ` Lutz Donnerhacke
2002-11-19 9:32 ` Preben Randhol
2002-11-19 11:18 ` Lutz Donnerhacke
2002-11-19 12:42 ` Georg Bauhaus
2002-11-19 9:00 ` Dmitry A. Kazakov
2002-11-18 14:30 ` Stephen Leake
2002-11-18 17:41 ` David C. Hoos
2002-11-14 14:29 ` David C. Hoos
2002-11-14 18:37 ` Jeffrey Carter
2002-11-14 22:03 ` Robert A Duff
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