[Python-Dev] threadsafe patch for asynchat (original) (raw)

Josiah Carlson jcarlson at uci.edu
Wed Feb 8 08:57:00 CET 2006

"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.

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