Re: proc based observers

[Andrew Cagney <cagney at redhat dot com>]

Mark Wielaard wrote:
> > I'd like to suggest, and now that the task observers are working well, 
> > that we extend the observer interface so that, in addition to Task 
> > observers there be Proc wide observers.  For instance:
> >
> >    Proc.addObserverBLAH()
> >
> > would notify of any event of any task within the proc.
> >
> > Thoughts
> >     
>
> Seems like a good idea. In these situations does the caller expect the
> observer to be added to the current Tasks of the Proc or all Tasks of
> the Proc in the future that might not exist yet?
>
>   

We're not building a new bike shed.  Existing code already implements 
proc-wide observers (yes a proc-wide observer really is proc-wide), only 
it uses a clone observer and brute force to track new tasks as they are 
created.  This change will let implement the functionality more directly 
in the core; hopefully a natural refactoring.

Andrew