Re: Periodic tasks - organization

[Anh Vo <anhvofrcaus@gmail.com>]

On Jul 18, 9:22 am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
> On Fri, 18 Jul 2008 08:31:29 -0700 (PDT), Anh Vo wrote:
> > On Jul 17, 12:31�pm, Simon Wright <simon.j.wri...@mac.com> wrote:
> >> But there are limits on what is permissible within a protected
> >> procedure, are there not?
>
> [...]
>
> > My design is completely different from yours. Indeed, an explicit task
> > is not needed. See Gem #15, Timers, for details.
> >http://www.adacore.com/2007/10/29/ada-gem-15/
>
> Hmm, but it is exactly the design presented by Simon. The problem with it
> is that the action fired upon a timer event is called from a protected
> procedure.

I hope you already looked at ada-gem-15 and see the difference.

> This is IMO not what Maciej wanted, because as Simon has pointed out
> protected procedures are very limited in what they allowed do and in how
> they do it.

Why is Protected Procedure limited for this purpose?

> Another point is that even if that were the context of a task (which is
> not), it still would be an unsatisfactory design, because simultaneously
> triggered actions would block each other when overlapping.

Again, look at the full code in Ada-Gem-15. There is no overlap action
at all.