Re: Barrier re-evaluation issue with GNAT 4.3.2

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Fri, 25 Sep 2009 02:57:42 -0700 (PDT), Ludovic Brenta wrote:

> Dmitry A. Kazakov wrote on comp.lang.ada:
>> Timing_Events does not have any advantages over delay or asynchronous
>> transfer of control. I guess it was provided for some low-level stuff like
>> interrupts from hardware timers. However there was already a support for
>> interrupts mapped into protected operations, so it really puzzles me why
>> Timing_Events were added.
> 
> The reasons are explained in AI95-297. It seems you've never written
> any low-level code before, or cared about it?

... cared not to write lower-level code. (:-))

> [1] http://www.ada-auth.org/cgi-bin/cvsweb.cgi/ais/ai-00297.txt?rev=1.25

The example of changing task priorities looks artificial to me. I don't
think a "normal" concurrent applications could benefit from Timing_Events.
There were much more pressing problems than this one (making tasks and
protected objects tagged, working task components of controlled objects
etc.)

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de