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From: Gautier write-only <gautier_niouzes@hotmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Q: Stopping a task running a long simulation
Date: Thu, 11 Mar 2010 17:50:00 -0800 (PST)
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> You're saying Feedback would check something to see if another task
> wants to abort it, and raise an exception if the answer is "yes"?

That's it (the exception being only internal to Compute, for reaching
its end quickly; probably I'll use an 'exit when' instead). The
feedback procedure would look like:
http://unzip-ada.sourceforge.net/za_html/zip__ads.htm#218_8

> I'd use a protected object for that (as opposed to a global Boolean
> user_abort as you seem to be suggesting).

Thanks - indeed in a way or the other, there would a Boolean written
(and only written) by the GUI action and read (and only read) by
Feedback, randomly. Isn't the pragma Volatile sufficient in such a
case ?

>=A0But I think this would work and might be better than the "abort" meat-a=
xe approach.

Thanks for the advice - indeed thinking further, it would be also
useful for a "Stop" UI command, where the simulation is just
interrupted, but the daemon would be kept alive for other simulations.

Gautier