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From: Martin Krischik <krischik@users.sourceforge.net>
Newsgroups: comp.lang.ada
Subject: Re: Where are returned values stored? (follow up to yesterday's
 question)
Date: Thu, 27 May 2004 19:07:29 +0200
Organization: AdaCL
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Date: 2004-05-27T19:07:29+02:00
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James Alan Farrell wrote:

> Hello again,
> This is a followup to the question I asked yesterday.  Below is a bit
> of code from GNAT's ASIS library.  (I imagine this was written by
> people with a lot more expertise in Ada than I have, and that this
> code is okay.)
> 
>  It has a declarative part in the middle of the code, in which a
> variable (Result)  is declared.  The stuff in that variable is
> returned.
> 
> Now its my understanding that when variables are declared like this,
> they are added onto the stack, then when the function returns, they
> are popped off again, along with the regular stack frame.  So the
> stuff returned goes away.

In addition to the other explanation you should be aware the the way this is
done depends if convention C, Ada or DLL is used.

I have made good experience with passing from Ada to C using convention DLL.

Convention C has not worked with all C compilers on Windows.

With Regards

Martin

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