[PyQt] test case for deadlock in signal / slot new style

[Erik Janssens]

Thanks for making my day !

I was already considering a complete refactoring to
get around the issue.

On Thu, 2010-10-07 at 11:09 +0100, Phil Thompson wrote:
> On Mon, 4 Oct 2010 22:27:59 +0200, Erik Janssens
> <Erik.Janssens at conceptive.be> wrote:
> > Hi,
> > 
> > I finally got around writting a simple test case to demonstrate
> > the deadlock in the signal/slot new style connections.
> > 
> > The test case can be ran using the following command :
> > 
> > python -m nose.core -v -s test_deadlock.py:SignalSlotCase
> > 
> > depending on the speed of your computer, it might take some
> > tweaking to observe the deadlock, it occurs when 'emitted' and
> > 'connected' are printed on the screen at the same time.
> > 
> > Here are some interesting observations :
> > 
> > - the deadlock happens independent of the QT / PyQT version
> > - the old_style never deadlocks
> > - this example won't work at all using PySide, it seems that PySide
> >   doesn't support queued connections involving python objects.
> > 
> > I'm not sure what I have to do with this issue, is this a Qt, Python
> > or PyQt issue ??
> 
> Life is so much easier with a good test case...
> 
> Should be fixed in tonight's PyQt snapshot.
> 
> Thanks,
> Phil