Thread termination

[Stefan Schukat]

Hello
 
you are using the module variable ie inside the Generic Function, but
you have to use  "d" since this is the Python object 
which is allowed to access the COM object in the separate thread.
 
    Stefan


________________________________

	From: Tejovathi P [mailto:tejovathi.p at gmail.com] 
	Sent: Monday, October 16, 2006 9:47 AM
	To: Stefan Schukat
	Subject: Re: Thread termination
	
	

	HI all, 

	I have a problem in accesing COM objects in threads. To be
precise, lets assume that I have a class GenericFunctions which is
defined as follows:

	import win32com.client, pythoncom, thread 
	ie=win32com.client.Dispatch('internetexplorer.application') 
	ie.Visible=1 

	class GenericFunctions:
	        
	       def __init__(self):
	             print "In Constructor of Generic Functions"
	        
	       def MyNavigate(self,dest):
	             ie.Navigate(dest) 

	
	Now there  is another file Main.py which is defined as follows:

	import win32com.client, pythoncom, thread 
	from GenericFunctions import *
	obj = GenericFunctions()

	class Mainclass:
	       def __init__(self);
	            print "In Constructor of Main class"

	       def threadFunction(self,dest):
	            pythoncom.CoInitialize()
	            d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
	            my_ie=win32com.client.Dispatch(d)
	            obj.func(dest)          # this is gving an error.
	            pythoncom.CoUninitialize()

	if __name__ == "__main__":
	
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatc
h,ie)
	         thread.start_new_thread(self.nav, (s,'www.google.com ')

	Basically, I want to access object of GenericFunctions class
inside threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is.... 
	Please let me know the solution ASAP...

	Teja.P

	
	 



	On 10/13/06, Stefan Schukat <SSchukat at dspace.de> wrote: 

		Reading from your last posts you are using COM objects.
Therefore you
		should not "kill" the thread since this 
		would lead to reference leaks. So there are only two
ways left:
		
		1. Program a specific interpreter and not use python.exe
which
		implements an access to PyThreadState_SetAsyncExc
		2. Check in the separate thread at specific times a
variable which is 
		set in the main thread.
		
		Both need the try finally construct in the
threadfunction to release COM
		objects in the right way.
		I.e., (taking the source from Roger):
		
		
		def ThreadFunction(istream, dest): 
		     pythoncom.CoInitialize() // Initialize COM Runtime
for this thread
		       try:
	
d=pythoncom.CoGetInterfaceAndReleaseStream(istream,
		pythoncom.IID_IDispatch)
		               my_ie=win32com.client.Dispatch (d)
		               my_ie.Navigate(dest)
		       finally:
		               my_ie = None  // Release COM object
		             pythoncom.CoUninitialize() // Release COM
Runtime for this
		thread
		
		
		       Stefan 
		


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