From: "Pat Rogers" <progers@classwide.com>
Subject: Re: memory leakages with Ada?
Date: Sat, 16 Mar 2002 14:38:32 GMT
Date: 2002-03-16T14:38:32+00:00 [thread overview]
Message-ID: <INIk8.12175$2V5.2924986477@newssvr11.news.prodigy.com> (raw)
In-Reply-To: s3369uo70srjh7m4pjkgt6n4kpt88hdeb8@4ax.com
"DPH" <rally2xs@compuserve.com> wrote in message
news:s3369uo70srjh7m4pjkgt6n4kpt88hdeb8@4ax.com...
> On Fri, 15 Mar 2002 12:55:19 GMT, "Pat Rogers" <progers@classwide.com>
> wrote:
>
> >"John McCabe" <john.mccabe@emrad.ns.com> wrote in message
> >news:3c91bfa3.1987537@news.demon.co.uk...
> >> On Thu, 14 Mar 2002 15:12:21 -0500, "Marin David Condic"
> >> <dont.bother.mcondic.auntie.spam@[acm.org> wrote:
> >>
> >> >In comparing Ada to C on this there are two observations: One is that Ada
> >> >provides a different model for dynamic allocation than does C that
includes,
> >> >among other things, a lot more checks/safety features to minimize the
> >> >possibility of lost memory. (Still, the standard doesn't require garbage
> >> >collection so you can still leak memory if you mess things up.) It isn't
> >> >impossible to leak memory in Ada - just less likely.
> >>
> >> One of the things I've found recently, since starting to use C++ more,
> >> is that Ada.UncheckedDeallocation is so much nicer than 'delete' as it
> >> returns you a nice, null pointer! 'delete' in C++ appears to remove
> >> the allocated block, but leave your pointer pointing to where it used
> >> to be!
> >
> >Although there are several things I really like about C++, one of the things
> >that I find shocking is that the programmer must remember to use a very
slightly
> >different syntax when calling delete on an allocated array, and that the
other
> >syntax will also compile and run -- and at the very least leak. (I
understand
> >the reason for this, don't bother to explain why; it still stinks!) That
isn't
> >the only such example, of course, but one that I find amazing.
> >
> >For example, the following is perfectly legal and wrong :
> >
> >char* p = new char[n];
> >delete p;
> >
> >I have to remember to say:
> >
> >delete[] p;
>
> No you don't... you just write it with Borland C++ Builder 5 or better
> with CodeGuard turned on, and CodeGuard will complain about it all
> over the place.
But then why can't the compiler do that?
next prev parent reply other threads:[~2002-03-16 14:38 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 [this message]
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
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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