[coyotos-dev] Status and roadmap

[Jonathan S. Shapiro]

Thanks for clarifying.

I think this is a good change, and I think that it is perfectly fine to
consider this to be normative text.

shap

On Mon, 2007-01-22 at 16:50 +0000, Sam Mason wrote:
> On Mon, Jan 22, 2007 at 10:20:06AM -0500, Jonathan S. Shapiro wrote:
> > On Mon, 2007-01-22 at 00:12 +0000, Sam Mason wrote:
> > > My memory wasn't quite what it should be!  I was remembering section
> > > 3.3.1 "Event Arrival and Run-In".  It only explicitly specifies what
> > > happens when the activated field is non-zero.  I thought this was
> > > missing but re-reading more slowly I now realise that this hasn't been
> > > missed and is most definitly the intended behaviour!
> > > 
> > > It may help people, especially on a first reading, to put something in
> > > here to say that doing nothing in this case is correct.
> > 
> > Sam: there was an update between your two readings. Given the new text,
> > do you still think that a note is appropriate, and if so, where?
> 
> You currently have the following in the section titled "Event Arrival
> and Run-In".
> 
> 
>   1. The Activated field is tested.
> 
>     o If the Activated field is zero, the process is currently in the
>       normal state. An arbitrary enqueued event is chosen for delivery
>       (as described below), and its payload is transferred to the
>       dispatch registers.
>       The Activated field is set to 1.
> 
>   2. If further events are queued for delivery, the PendingEvents
>      field is set to 1. Otherwise, it is set to zero.
> 
>   3. The process is dispatched to a CPU and execution begins.
> 
> 
> I would be tempted to put something after "If the Activated field is
> zero" paragraphs to the effect of "If the Activated field is non-zero
> the dispatch registers remain untouched".  I'm not sure if I'm being
> overly lazy in thinking this is needed, but it seems like the sort of
> place you'd have a comment in the code to say nothing needs to be done
> in this case.
> 
> This is a bit of a break from the distinct normative and descriptive
> sections you have at the moment, so I'd understand if it stays the way
> it is at the moment.
> 
> 
>   Sam
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-- 
Jonathan S. Shapiro, Ph.D.
Managing Director
The EROS Group, LLC
+1 443 927 1719 x5100