Threads, Callbacks, Classes [Long]

[Gerson Kurz]

Folks, it gets weirder. 

Here is a test DLL (MSDEV project) plus a testscript:

http://www.p-nand-q.com/python/pxfstest.zip (6438 Bytes)

Its really easy, just two functions, one synchronous, one
asynchronous. 

a) given a msgport of the form

import Queue
msgport = Queue.Queue()

a callback "msgport.put" works, *if* called from the same thread. it
does NOT work if called from another thread - no message will be
posted in this case.

b) If I use a callback function (see pxfstest.py), I get the error
messages

Fatal Python error: PyEval_ReleaseThread: wrong thread state
Fatal Python error: PyThreadState_Get: no current thread
and an exception somewhere in python21_d.dll (I'm using ActiveState
ActivePython 2.1) even though the callback got called properly.

I'm completely @ loss what happens here.