Hello,
I have been experimenting with the osgWidget library recently, and came
across what I believe to be a memory leak. I added a break point to the
osgWidget::Callback destructor, and it is never called when running the
osgwidgetcanvas example program (the constructor is called a number of
times).
The osgWidget::EventInterface::CallbackList typedef line in
osg/include/osgWidget/EventInterface is:
typedef std::list<osg::observer_ptr<Callback> > CallbackList;
Therefore, the osgWidget::EventInterface object is not managing the
callback's memory. Clients could make the mistake of passing in a
temporary ref_ptr which would then go out of scope before the callback
is used, or if the client passes in an unmanaged pointer (like in the
osgWidget examples), there will be a memory leak unless the caller
explicitly deallocates the callback at some point in the future after
the callback is no longer associated with the scene.
Should the CallbackList type be a std::list <osg::ref_ptr <Callback>>
instead?
Thanks,
Judson
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