Re: Object Reference counting idea.

[Michael Meeks <michael helixcode com>]

Hi Elliot,

On Tue, 10 Oct 2000, Elliot Lee wrote:
> This (if you unref more times than you ref, things crash) isn't a
> problem that needs to be solved, assuming your object impl deactivates
> the servant on the unref that takes the refcount to zero.
  
        Somehow I disagree, or don't understand your point; consider this
scenario:

        Local   Remote
        ref
        ref
                ref
                ref
                unref
                unref 
                unref   <-- Erroneous unref. [3]
        unref           <-- Servant destroyed
        unref           <-- crash here.

        There are clearly multiple variations and degrees of pathology    
here, there is no reason why we can't loop at [3] for ever ( having killed
the Local object ) without issue. I am not however primarily concerned    
with the stability of the ( broken ) script.

> The main problem is that a client can crash while holding a refcount,
> and there is no way to know whether or not somebody is 'making use of'
> an objref.
        
        This is a far more intractible problem, what I want to solve is 
scripts grabbing an interface reference and then unreffing it repeatedly
until stuff gets badly screwed in the server ( which may be serving lots
of clients like the panel ).

	Regards,

		Michael.

-- 
 mmeeks gnu org  <><, Pseudo Engineer, itinerant idiot