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From: Simon Wright <simon.j.wright@mac.com>
Newsgroups: comp.lang.ada
Subject: Re: GNAT for MS Visual Studio
Date: Fri, 05 Oct 2007 21:15:25 +0100
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Date: 2007-10-05T21:15:25+01:00
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Maciej Sobczak <see.my.homepage@gmail.com> writes:

> On 3 Pa , 21:40, Pascal Obry <pas...@obry.net> wrote:
>
>> The container won't change, so this can't be a problem.
>
> The visible state of the container might not change, but the
> container is free to do some accounting, for example with cursors,
> to ensure the ability to catch any misuse.

If the library is not protected internally against concurrent access
then it would be a clever implementation that could guarantee even to
detect misuse. I suppose it could do something involving pragma Atomic
and a use count.

I had thought that the Booch Components would be readably shared, but
not so -- the Unbounded and Unmanaged forms maintain a simple internal
cache which isn't atomic and could be trashed by concurrent access.

> There is one thing that might help here - the documentation of the
> given library implementation.

The only info you can rely on is that in the standard, of course.