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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Ada Library, called, returns and continues ?
Date: Mon, 17 Dec 2012 17:08:20 +0000
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Date: 2012-12-17T17:08:20+00:00
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Patrick <patrick@spellingbeewinnars.org> writes:

> If a protected object and it's entries are bound to a C/C++
> application with it's own main, do you think the Ada threads will
> begin when the C main is called or would I need to create an
> initialization for them? If they just started, main C could call an
> entry or If I used a protected record I could also access this as a
> struct and retrieve data this way. Do you think I could send data back
> and forth through the protected record?

[1] tells how to bind (how to invoke gnatbind) for a non-Ada main
program; this generates the necessary Ada elaboration code, and your C
calls "adainit" to do the elaboration, start tasks etc. There's also an
"adafinal", which I've never had occasion to call, and I believe you can
get GNAT to use a different name if necessary.

C can't call POs or task entries directly, you'd need to write Ada
subprograms to do that and arrange to call them from the C.

[1] http://docs.adacore.com/gnat-unw-docs/html/gnat_ugn_5.html#SEC70