[e-lang] Events as Bad Ideas

[Karp, Alan H]

Shap wrote:
> 
> Oddly enough, it looks like Coyotos is going to abandon this. It turns
> out that you *don't* need a return. What you need is the ability to
> transmit a capability on which the returned message should be 
> sent. You
> also need a way to invalidate this efficiently.
> 
This is exactly what e-speak did, so we know it works.  In fact, there's
a nice feature you can use.  The capability for the return message can
point to someone else.  We made good use of that ability for error
returns (stderr).  We could have an error handler that did some fix-up
of an error and then forward the result to the original requester.
 
What do you mean "invalidate this"?
  
________________________
Alan Karp
Principal Scientist
Virus Safe Computing Initiative
Hewlett-Packard Laboratories
1501 Page Mill Road
Palo Alto, CA 94304
(650) 857-3967, fax (650) 857-7029
https://ecardfile.com/id/Alan_Karp
http://www.hpl.hp.com/personal/Alan_Karp

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