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From: "J-P. Rosen" <rosen@adalog.fr>
Newsgroups: comp.lang.ada
Subject: Re: Finalization of library level tasks
Date: Tue, 17 Apr 2018 16:08:57 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:51556
Date: 2018-04-17T16:08:57+02:00
List-Id: <comp.lang.ada>

Le 17/04/2018 à 14:47, Dmitry A. Kazakov a écrit :
> I don't understand the meaning of "revive". The meaning of
> 
>    select
>       terminate;
>    else
>       null;
>    end select;
> 
> is crystal clear: continue if no master did request termination else
> continue. Again, I thought that T'Callable were there to determine if a
> master wants the task to terminate.
It's just that your mental model of 'Callable and Terminate is not the
one of Ada. A master does not require termination from its dependent
tasks: it checks (recursively) if all the dependent tasks are either
already terminated or similarly waiting on a select-with-terminate. If
yes, the whole family terminates simultaneously.

When a master is waiting for dependent tasks to terminate (at its end,
NOT if on a select-with-terminate), it is not yet Terminated, but it is
no more Callable.

-- 
J-P. Rosen
Adalog
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