"Fredrik Lundh" <fredrik at pythonware.com> wrote: > > Steve Holden wrote: > > > > What is the reason that people want to use threads when they can have > > > poll/select-style message processing? Why does Zope require threads? > > > IOW, why would anybody *want* a "threadsafe patch for asynchat"? > > > > > In case the processing of events needed to block? If I'm processing web > > requests in an async* dispatch loop and a request needs the results of a > > (probably lengthy) database query in order to generate its output, how > > do I give the dispatcher control again to process the next asynchronous > > network event? > > > > The usual answer is "process the request in a thread". That way the > > dispatcher can spring to life for each event as quickly as needed. > > but why do such threads have to talk to asyncore directly ? Indeed. I seem to remember a discussion a few months ago about "easy" thread programming, which invariably directed people off to use the simplest abstractions necessary: Queues. - Josiah
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