Re: [Twisted-Python] Creating a COM object in a thread

Hugh,

The way I do this is I isolate all the COM stuff in a separate thread from thread that runs my reactor.

This all looks good, and I think I understand it. One question, though: from my investigation, it seems that the hangup is in the COM object creation itself, where Mark and I think it's waiting on a Windows message. Wouldn't I have to have the event loop running before calling Dispatch? (FWIW, I do call CoInitializeEx the same way you do, and have the object built with apartment threading.)

This thread starts by calling:

pythoncom.CoInitializeEx(pythoncom.COINIT_APARTMENTTHREADED)

it then creates the COM object and runs an event loop something like this:

while keepRunning: n = MsgWaitForMultipleObjects(handles, False, timeout, QS_ALLINPUT) if n == WAIT_OBJECT_0 + nHandles: # There is a win32 message waiting. if pythoncom.PumpWaitingMessages(): keepRunning = False

I send messages to the thread by putting them in a queue and setting an event. The messages cause methods to be called on the COM object. I send the results of the COM methods back to the reactor thread using reactor.callFromThread().

Thanks much for the help, -- Don Dwiggins Advanced Publishing Technology