From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Allocators and exceptions
Date: Wed, 12 Sep 2007 22:35:42 +0200
Date: 2007-09-12T22:34:55+02:00 [thread overview]
Message-ID: <1bi8swgas8pjl$.1tr7pfyemom8q.dlg@40tude.net> (raw)
In-Reply-To: 1189613298.182273.23310@22g2000hsm.googlegroups.com
On Wed, 12 Sep 2007 09:08:18 -0700, Adam Beneschan wrote:
> By the way, although I think having the language deallocate the object
> automatically is a bad idea,
How to reconcile this with:
1. objects allocated on the stack
2. all sorts of temporal objects the compiler is allowed to create (and
thus allocate somehow, somewhere)
3. a permission given to collect garbage?
Anyway, presuming that the constructor shall clean its mess before
propagating any exceptions, there is no any object here to "deallocate" (I
would say "destroy").
> I do sympathize with the problem that
> it's impossible to get a hold of the access value that was already
> allocated so that you can do an Unchecked_Deallocation yourself. None
> of the workarounds seem all that good. Unfortunately, I can't think
> of a good way to add this to the language.
Unchecked_Deallocation may not be called on a pointer to non-constructed
objects. Semantically it is not a pointer at all. It is a raw address on
which Deallocate has to be called. This is indeed a problem. If Ptr is
invalid, then Ptr.all'Address is erroneous.
A related issue, why on earth "new" is allowed to propagate anything but
Storage_Error or else Program_Error?
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2007-09-12 20:35 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-09 7:40 Allocators and exceptions Maciej Sobczak
2007-09-09 12:17 ` anon
2007-09-09 20:31 ` Maciej Sobczak
2007-09-09 22:43 ` Simon Wright
2007-09-10 12:10 ` Maciej Sobczak
2007-09-10 19:08 ` Simon Wright
2007-09-10 2:56 ` anon
2007-09-10 12:42 ` Dmitry A. Kazakov
2007-09-10 21:48 ` Maciej Sobczak
2007-09-11 9:16 ` Dmitry A. Kazakov
2007-09-11 9:19 ` Maciej Sobczak
2007-09-11 12:27 ` Dmitry A. Kazakov
2007-09-11 19:07 ` Maciej Sobczak
2007-09-11 22:56 ` Georg Bauhaus
2007-09-12 12:36 ` Maciej Sobczak
2007-09-12 22:19 ` Randy Brukardt
2007-09-12 9:32 ` Dmitry A. Kazakov
2007-09-12 12:42 ` Maciej Sobczak
2007-09-12 15:25 ` Dmitry A. Kazakov
2007-09-12 12:29 ` Stephen Leake
2007-09-12 12:46 ` Maciej Sobczak
2007-09-12 20:53 ` Simon Wright
2007-09-12 22:32 ` Randy Brukardt
2007-09-12 23:43 ` Simon Wright
2007-09-13 3:42 ` Randy Brukardt
2007-09-13 3:36 ` Randy Brukardt
2007-09-13 9:43 ` Maciej Sobczak
2007-09-12 22:25 ` Randy Brukardt
2007-09-13 11:51 ` Stephen Leake
2007-09-12 14:14 ` Markus E L
2007-09-10 10:37 ` Allocators and exceptions => Read Me First anon
2007-09-10 12:16 ` Maciej Sobczak
2007-09-10 22:10 ` Allocators and exceptions => Trying Again anon
2007-09-10 23:15 ` Markus E L
2007-09-10 15:44 ` Allocators and exceptions Adam Beneschan
2007-09-10 21:58 ` Maciej Sobczak
2007-09-10 22:07 ` Jeffrey R. Carter
2007-09-11 9:14 ` Dmitry A. Kazakov
2007-09-11 9:23 ` Maciej Sobczak
2007-09-11 2:36 ` Randy Brukardt
2007-09-11 15:33 ` Adam Beneschan
2007-09-11 19:21 ` Maciej Sobczak
2007-09-11 21:56 ` Adam Beneschan
2007-09-12 0:34 ` Jeffrey R. Carter
2007-09-12 12:13 ` Maciej Sobczak
2007-09-12 16:34 ` Jeffrey R. Carter
2007-09-12 23:50 ` Jeffrey R. Carter
2007-09-12 12:22 ` Maciej Sobczak
2007-09-12 14:11 ` Markus E L
2007-09-12 16:08 ` Adam Beneschan
2007-09-12 20:35 ` Dmitry A. Kazakov [this message]
2007-09-12 21:01 ` Adam Beneschan
2007-09-12 22:45 ` Randy Brukardt
2007-09-13 7:48 ` Dmitry A. Kazakov
2007-09-12 3:08 ` Allocators and exceptions -- Debugging says memory leak! anon
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