Use of threading.Condition class

vonWedel at lfpt.rwth-aachen.de vonWedel at lfpt.rwth-aachen.de
Thu Jan 4 13:37:23 CET 2001


Hi,

I'm trying to pass data between threads A and B. A notifies B to produce 
something 
and now I want the reference to the produced instance back in thread A. 
The documentation for threading.Condition proposes something like

     # Consume one item
     cv.acquire()
     while not an_item_is_available():
         cv.wait()
     get_an_available_item()
     cv.release()

for the consumer side. I don't understand the while loop around
the cv.wait() statement -- wouldn't cv.wait() block anyway until 
cv.notify() has been called in the other thread?

Lars
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