From: "J-P. Rosen" <rosen@adalog.fr>
Subject: Re: Custom Storage Pool questions
Date: Mon, 13 Sep 2021 13:12:39 +0200 [thread overview]
Message-ID: <shnbn8$5he$1@dont-email.me> (raw)
In-Reply-To: <e3c5c553-4a7f-408a-aaa7-60ec0b70202dn@googlegroups.com>
Le 13/09/2021 à 02:53, Jere a écrit :
> I was learning about making user defined storage pools when
> I came across an article that made me pause and wonder how
> portable storage pools actually can be. In particular, I assumed
> that the Size_In_Storage_Elements parameter in the Allocate
> operation actually indicated the total number of storage elements
> needed.
>
> procedure Allocate(
> Pool : in out Root_Storage_Pool;
> Storage_Address : out Address;
> Size_In_Storage_Elements : in Storage_Elements.Storage_Count;
> Alignment : in Storage_Elements.Storage_Count) is abstract;
>
> But after reading the following AdaCore article, my assumption is now
> called into question:
> https://blog.adacore.com/header-storage-pools
>
> In particular, the blog there advocates for separately counting for
> things like unconstrained array First/Last indices or the Prev/Next
> pointers used for Controlled objects. Normally I would have assumed
> that the Size_In_Storage_Elements parameter in Allocate would account
> for that, but the blog clearly shows that it doesn't
[...]
That blog shows a special use for Storage_Pools, where you allocate
/user/ data on top of the requested memory. When called by the compiler,
it is up to the compiler to compute how much memory is needed, and your
duty is to just allocate that.
--
J-P. Rosen
Adalog
2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX
Tel: +33 1 45 29 21 52
https://www.adalog.fr
next prev parent reply other threads:[~2021-09-13 11:12 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-13 0:53 Custom Storage Pool questions Jere
2021-09-13 5:29 ` Randy Brukardt
2021-09-14 1:04 ` Jere
2021-09-21 0:06 ` Randy Brukardt
2021-09-18 11:32 ` Simon Wright
2021-09-20 0:31 ` Jere
2021-09-20 6:34 ` Niklas Holsti
2021-09-20 6:48 ` Emmanuel Briot
2021-09-20 7:35 ` Dmitry A. Kazakov
2021-09-20 16:59 ` Shark8
2021-09-21 0:50 ` Randy Brukardt
2021-09-21 23:08 ` Jere
2021-09-28 4:42 ` Randy Brukardt
2021-10-02 23:19 ` Jere
2021-10-03 8:52 ` Dmitry A. Kazakov
2021-10-14 1:26 ` Randy Brukardt
2021-09-13 11:12 ` J-P. Rosen [this message]
2021-09-14 0:48 ` Jere
2021-09-14 6:08 ` J-P. Rosen
2021-09-15 0:39 ` Jere
2021-09-15 7:01 ` Simon Wright
2021-09-16 23:32 ` Jere
2021-09-20 23:51 ` Randy Brukardt
2021-09-21 22:40 ` Jere
2021-09-14 6:23 ` Dmitry A. Kazakov
2021-09-14 6:42 ` J-P. Rosen
2021-09-14 7:00 ` Dmitry A. Kazakov
2021-09-20 23:58 ` Randy Brukardt
2021-09-15 0:21 ` Jere
2021-09-15 6:54 ` Dmitry A. Kazakov
2021-09-20 23:48 ` Randy Brukardt
2021-09-14 10:54 ` Egil H H
2021-09-15 0:11 ` Jere
2021-09-15 16:43 ` Simon Wright
2021-09-15 17:03 ` Simon Wright
2021-09-15 19:07 ` Dmitry A. Kazakov
2021-09-15 20:40 ` Simon Wright
2021-09-16 7:12 ` Emmanuel Briot
2021-09-16 23:21 ` Jere
2021-09-17 7:08 ` Emmanuel Briot
2021-09-17 7:18 ` Simon Wright
2021-09-17 13:56 ` Dmitry A. Kazakov
2021-09-17 19:46 ` Simon Wright
2021-09-17 20:39 ` Dmitry A. Kazakov
2021-09-17 21:17 ` Niklas Holsti
2021-09-18 7:49 ` Dmitry A. Kazakov
2021-09-18 9:03 ` Niklas Holsti
2021-09-18 10:22 ` Dmitry A. Kazakov
2021-09-18 15:59 ` Niklas Holsti
2021-09-18 16:19 ` Dmitry A. Kazakov
2021-09-19 10:36 ` Niklas Holsti
2021-09-19 11:41 ` Dmitry A. Kazakov
2021-09-20 7:05 ` Niklas Holsti
2021-09-20 7:35 ` Dmitry A. Kazakov
2021-09-20 8:08 ` Niklas Holsti
2021-09-20 8:28 ` Dmitry A. Kazakov
2021-09-21 0:45 ` Randy Brukardt
2021-09-21 0:40 ` Randy Brukardt
2021-09-21 0:30 ` Randy Brukardt
2021-09-21 0:37 ` Randy Brukardt
2021-09-21 6:28 ` Dmitry A. Kazakov
2021-09-28 4:38 ` Randy Brukardt
2021-09-28 7:00 ` Dmitry A. Kazakov
2021-09-21 0:26 ` Randy Brukardt
2021-09-21 6:51 ` Dmitry A. Kazakov
2021-09-28 4:31 ` Randy Brukardt
2021-09-28 6:56 ` Dmitry A. Kazakov
2021-09-28 7:52 ` Simon Wright
2021-09-28 8:07 ` Dmitry A. Kazakov
2021-09-28 22:04 ` Randy Brukardt
2021-09-29 7:57 ` Dmitry A. Kazakov
2021-09-29 14:41 ` Shark8
2021-09-29 15:16 ` Dmitry A. Kazakov
2021-09-30 0:16 ` Randy Brukardt
2021-09-30 8:08 ` Dmitry A. Kazakov
2021-10-01 0:04 ` Randy Brukardt
2021-10-01 8:25 ` Dmitry A. Kazakov
2021-10-02 9:06 ` Randy Brukardt
2021-10-02 10:18 ` Dmitry A. Kazakov
2021-10-03 4:33 ` Randy Brukardt
2021-10-03 8:40 ` Dmitry A. Kazakov
2021-10-14 1:21 ` Randy Brukardt
2021-10-14 3:12 ` philip...@gmail.com
2021-10-14 7:31 ` Dmitry A. Kazakov
2021-10-15 0:36 ` Randy Brukardt
2021-10-15 8:08 ` Stephen Leake
2021-10-15 8:18 ` Dmitry A. Kazakov
2021-10-15 22:22 ` Randy Brukardt
2021-10-15 8:15 ` Dmitry A. Kazakov
2021-10-15 22:44 ` Randy Brukardt
2021-10-16 9:00 ` Dmitry A. Kazakov
2021-10-16 14:32 ` Simon Wright
2021-10-16 15:06 ` Dmitry A. Kazakov
2021-10-18 14:23 ` Shark8
2021-09-21 0:19 ` Randy Brukardt
2021-09-21 0:18 ` Randy Brukardt
2021-09-16 8:41 ` Dmitry A. Kazakov
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