From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Allocators design flaw
Date: Sat, 14 Oct 2017 17:51:47 +0200
Date: 2017-10-14T17:51:47+02:00 [thread overview]
Message-ID: <ortbqj$1rgf$1@gioia.aioe.org> (raw)
In-Reply-To: ort9t0$1oaf$2@gioia.aioe.org
On 2017-10-14 17:17, Victor Porton wrote:
> Dmitry A. Kazakov wrote:
>
>> On 2017-10-14 16:24, Victor Porton wrote:
>>
>>> I mean, it is because we cannot change C standard for better
>>> compatibility with Ada. But we can change Ada 202x for better
>>> compatibility with C libraries.
>>
>> There is nothing incompatible in what you described.
>>
>> There are many C libraries (most?) which cannot deal with objects
>> allocated outside, e.g. in an Ada pool. There was never a big problem to
>> communicate with such libraries.
>
> I want to create an Ada pool which does the same (de)allocation as a C
> library.
>
> The problem is that creating such a pool is (seemingly) impossible with
> current Ada RM.
It is possible as I explained. You allocate additional information in
front of the object and shift address. Upon deallocation you use that
information to shift the address back before passing it to C's free. The
same technique is used when handling Ada's array address issue in Simple
Components.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2017-10-14 15:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-14 2:53 Allocators design flaw Victor Porton
2017-10-14 7:27 ` Dmitry A. Kazakov
2017-10-14 13:52 ` Victor Porton
2017-10-14 14:25 ` Dmitry A. Kazakov
2017-10-14 14:03 ` Victor Porton
2017-10-14 14:26 ` Dmitry A. Kazakov
2017-10-14 15:18 ` Victor Porton
2017-10-14 15:44 ` Dmitry A. Kazakov
2017-10-14 16:42 ` Victor Porton
2017-10-14 16:13 ` Simon Wright
2017-10-14 16:38 ` Victor Porton
2017-10-14 14:12 ` Victor Porton
2017-10-14 14:20 ` Victor Porton
2017-10-14 14:24 ` Victor Porton
2017-10-14 14:36 ` Dmitry A. Kazakov
2017-10-14 15:17 ` Victor Porton
2017-10-14 15:51 ` Dmitry A. Kazakov [this message]
2017-10-14 16:34 ` Victor Porton
2017-10-14 17:14 ` Dmitry A. Kazakov
2017-10-14 17:24 ` Victor Porton
2017-10-14 18:08 ` Dmitry A. Kazakov
2017-10-14 14:28 ` Dmitry A. Kazakov
2017-10-14 15:14 ` Victor Porton
2017-10-14 15:42 ` Simon Wright
2017-10-14 16:29 ` Victor Porton
2017-10-14 20:07 ` Simon Wright
2017-10-14 21:26 ` Victor Porton
2017-10-21 1:42 ` Randy Brukardt
2017-10-14 8:02 ` Simon Wright
2017-10-14 13:59 ` Victor Porton
2017-10-14 14:35 ` Simon Wright
2017-10-14 15:11 ` Victor Porton
2017-10-14 15:56 ` Simon Wright
2017-10-14 16:22 ` Victor Porton
2017-10-29 16:01 ` David Thompson
2017-10-14 14:11 ` Victor Porton
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