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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Does GNAT support a thread-free RTS?
Date: Tue, 13 Sep 2011 22:35:03 +0200
Organization: cbb software GmbH
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Date: 2011-09-13T22:35:03+02:00
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On Tue, 13 Sep 2011 18:54:53 +0200, Georg Bauhaus wrote:

> On 13.09.11 14:18, Dmitry A. Kazakov wrote:
> 
>> Protected objects are not tagged, you need inheritance to provide typed
>> channels. You meed multiple dispatch to handle channel-type + value-type
>> hierarchies. You need entries returning indefinite values. You need MI to
>> have handles to the channels/devices implementing the interface of a
>> protected object.
> 
> Is there an AI on "limited holders"?

Holder is useless without delegation, interface inheritance, MI, otherwise
it quickly becomes an endless swamp of generic instantiations. Note also
classical MD case: channel-type x value-type (<=> handle-type).

BTW, protected objects are unsuitable for distributed interfaces anyway.
You need a background task to prevent blocking upon I/O. The usual
technique of re-queueing does not help here. The interfaces must be tasks,
rather than objects.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de