[Qt-interest] QWaitCondition and signals/slots across threads

[Peter Bienstman]

Hi,

Attached is a simple (Python) testcase which emits a signal from a worker 
thread, and then waits until the main thread has released a database
connection.

It works fine under Linux, but under OSX Qt 4.7RC, PyQt 4.7.4, the slot never 
get's called, i.e. print "slot called" never gets executed.

From Googling around I know that putting the main thread to sleep with a 
QWaitCondition also puts the event loop to sleep. However, here we don't put 
the main thread to sleep, but only the worker thread, and only after we emit 
the signal.

What then is the reason that the slot never gets called on OSX?

Cheers,

Peter
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