From: "David C. Hoos" <david.c.hoos.sr@ada95.com>
Subject: Re: memory leakages with Ada?
Date: Tue, 19 Mar 2002 11:51:47 -0600
Date: 2002-03-19T11:51:47-06:00 [thread overview]
Message-ID: <mailman.1016559902.13877.comp.lang.ada@ada.eu.org> (raw)
In-Reply-To: 3C97713C.1040805@home.com
One problem with expecting an exception to be raised is that if the
once-freed
memory has been re-allocated it's impossible to discern whether an access
value
was set by the original or by the subsequent allocation.
Hence, the desirability of setting access values to null on deallocation.
----- Original Message -----
From: "Warren W. Gay VE3WWG" <ve3wwg@home.com>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: Tuesday, March 19, 2002 11:11 AM
Subject: Re: memory leakages with Ada?
> John McCabe wrote:
>
> > On Mon, 18 Mar 2002 17:38:46 GMT, "Warren W. Gay VE3WWG"
> > <ve3wwg@home.com> wrote:
> >
> >>My own personal observation is that C/C++ programmers will err on the
> >>side of efficiency, rather than safety. After a free()/delete, they'll
> >>usually not set the pointer to null.
> >
> > I'd never really thought of it as an efficiency issue but, having used
> > C++ for about 8 months now almost full-time I've got to the stage of
> > pretty much setting all pointers to NULL after a delete, unless
> > they're in a destructor (as it does seem like a waste of time there).
> >
> > Something else about unchecked deallocation, as far as I can remember,
> > is that if you give it a null pointer it doesn't do anything. This is
> > nice (but in a way it can make you lazy :-)
>
>
> If this is true, this is bad IMHO. I'd rather know by an exception
>
> that I was trying to free something that was "no more", than to go
> glibly forward. I'll have to test this on GNAT sometime.
> --
> Warren W. Gay VE3WWG
> http://home.cogeco.ca/~ve3wwg
>
> _______________________________________________
> comp.lang.ada mailing list
> comp.lang.ada@ada.eu.org
> http://ada.eu.org/mailman/listinfo/comp.lang.ada
>
next prev parent reply other threads:[~2002-03-19 17:51 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-14 14:07 memory leakages with Ada? Calvin Ow
2002-03-14 14:31 ` Larry Kilgallen
2002-03-14 20:42 ` Nick Roberts
2002-03-14 21:11 ` Larry Kilgallen
2002-03-14 21:07 ` Anh_Vo
2002-03-14 20:12 ` Marin David Condic
2002-03-15 9:37 ` John McCabe
2002-03-15 12:55 ` Pat Rogers
2002-03-16 4:36 ` Will
2002-03-16 4:53 ` Pat Rogers
2002-03-16 12:21 ` Larry Kilgallen
2002-03-16 9:13 ` DPH
2002-03-16 14:38 ` Pat Rogers
2002-03-16 14:56 ` DPH
2002-03-16 15:51 ` Preben Randhol
2002-03-16 16:39 ` DPH
2002-03-16 19:51 ` Pat Rogers
2002-03-16 20:40 ` DPH
2002-03-17 19:31 ` Richard Riehle
2002-03-17 21:49 ` Pat Rogers
2002-03-17 22:02 ` Pat Rogers
2002-03-18 22:32 ` Randy Brukardt
2002-03-18 22:47 ` Pat Rogers
2002-03-18 7:22 ` Richard Riehle
2002-03-18 17:35 ` Marin David Condic
2002-03-17 16:26 ` Steve Doiel
2002-03-16 20:18 ` Robert A Duff
2002-03-16 20:36 ` DPH
2002-03-15 14:20 ` Marin David Condic
2002-03-18 17:54 ` Warren W. Gay VE3WWG
2002-03-18 19:54 ` Hyman Rosen
2002-03-18 20:34 ` Larry Kilgallen
2002-03-18 21:18 ` Hyman Rosen
2002-03-18 21:45 ` Larry Kilgallen
2002-03-20 1:19 ` Hyman Rosen
2002-03-20 17:06 ` Warren W. Gay VE3WWG
2002-03-20 17:56 ` Larry Kilgallen
2002-03-20 17:48 ` Marin David Condic
2002-03-22 0:25 ` Matthew Woodcraft
2002-03-22 5:10 ` Hyman Rosen
2002-03-18 22:18 ` Marin David Condic
2002-03-20 20:49 ` Bertrand Augereau
2002-03-21 4:31 ` Will
2002-03-15 16:00 ` Hyman Rosen
2002-03-15 21:59 ` Chad R. Meiners
2002-03-17 5:43 ` Kevin Cline
2002-03-17 7:22 ` Chad R. Meiners
2002-03-18 4:09 ` Kevin Cline
2002-03-18 16:54 ` Chad R. Meiners
2002-03-18 17:38 ` Warren W. Gay VE3WWG
2002-03-19 9:21 ` John McCabe
2002-03-19 17:11 ` Warren W. Gay VE3WWG
2002-03-19 17:16 ` Pat Rogers
2002-03-19 17:51 ` David C. Hoos [this message]
2002-03-19 18:20 ` Frank J. Lhota
2002-03-19 23:43 ` Mark Johnson
2002-03-20 15:09 ` Frank J. Lhota
2002-03-17 7:27 ` Hyman Rosen
2002-03-18 3:52 ` Kevin Cline
2002-03-18 5:37 ` Hyman Rosen
2002-03-15 17:41 ` Kevin Cline
2002-03-15 18:00 ` Marin David Condic
2002-03-15 18:08 ` Hyman Rosen
2002-03-16 10:15 ` Kevin Cline
2002-03-14 23:14 ` Kevin Cline
2002-03-15 3:20 ` Steve Doiel
2002-03-15 9:32 ` John McCabe
2002-03-15 15:46 ` Hyman Rosen
2002-03-15 17:29 ` Kevin Cline
2002-03-15 15:48 ` Jeffrey Carter
2002-03-16 3:05 ` Steve Doiel
2002-03-16 20:19 ` Jeffrey Carter
2002-03-15 17:25 ` Kevin Cline
2002-03-15 18:03 ` Hyman Rosen
2002-03-16 10:07 ` Kevin Cline
2002-03-17 3:00 ` Hyman Rosen
2002-03-15 9:27 ` John McCabe
-- strict thread matches above, loose matches on Subject: below --
2002-03-20 6:25 Christoph Grein
2002-03-20 16:35 ` Hyman Rosen
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