[coyotos-dev] Endpoints and replies
clandau at macslab.com
Tue Jan 17 13:14:45 EST 2006
At 12:59 PM -0500 1/17/06, Jonathan S. Shapiro wrote:
>On Tue, 2006-01-17 at 09:52 -0800, Charles Landau wrote:
>> There is a design option that eliminates case 2. The openness of the
>> wait could be a property of the endpoint. Most commonly, servers will
>> wait on open endpoints and callers will wait on closed endpoints. You
>> couldn't use the same endpoint for both purposes, but I don't see a
> > need for that.
>If the endpoint type is specialized in this way, it seems likely that
>two checks need to be done in the invocation path: one on the endpoint
>type and the other on the application-provided option bits for the
More precisely, the option bits provided by each of the threads that
may be waiting.
>If a single endpoint type can semantically handle all cases,
>and performs reasonably for the sensible cases, it seems preferable to
>do one check rather than two.
You would be doing N checks rather than N+1, where N is the number of
threads waiting, typically one.
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