[Python-Dev] threadsafe patch for asynchat

Guido van Rossum guido at python.org
Wed Feb 8 00:05:38 CET 2006

IMO asynchat and asyncore are braindead. The should really be removed
from the standard library. The code is 10 years old and represents at
least 10-year-old thinking about how to do this. The amount of hackery
in Zope related to asyncore was outrageous -- basically most of
asyncore's guts were replaced with more advanced Zope code, but the
API was maintained for compatibility reasons. A nightmare.


On 2/6/06, "Martin v. Löwis" <martin at v.loewis.de> wrote:
> Mark Edgington wrote:
> > Does anyone have any comments about applying the following patch to
> > asynchat?
> That patch looks wrong. What does it mean to "run in a thread"?
> All code runs in a thread, all the time: sometime, that thread
> is the main thread.
> Furthermore, I can't see any presumed thread-unsafety in asynchat.
> Sure, there is a lot of member variables in asynchat which aren't
> specifically protected against mutual access from different threads.
> So you shouldn't be accessing the same async_chat object from multiple
> threads. I cannot see why using a creating and using
> an async_chat object in a thread that is not the main thread
> could cause any problems. I also cannot see how this patch could
> have significant effect on asyn_chat's behaviour when used in
> multiple threads.
> Regards,
> Martin
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--Guido van Rossum (home page: http://www.python.org/~guido/)

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