about the Observer header:
/home/cubicool/local/include/osg/Observer: In copy constructor
?osg::ObserverSet::ObserverSet(const osg::ObserverSet&)?:
/home/cubicool/local/include/osg/Observer:66: warning: base class ?class
osg::Referenced? should be explicitly initialized in the copy
constructor
I've been fixing this by hand by using the attached Observer header; it
does exactly what the warning requests. Purely cosmetic, I believe, but
other than that OSG seems to compile w/ -W -Wall just fine."
which utilises a global recursive mutex that is dedicated to manage Observer and ObserverSet.
The new global mutex for observers avoids problems with deadlocks that were occurring previously when
an osg::Refenced object was being deleted at the same time as on osg::ObserverNodePath.
the extra capability of making it possible for Observers to assume ownership of a object that would otherwsie be deleted.
Added a thread safe ref_ptr<T> observer_ptr<T>::lock() method for robust access to an observed object. This
makes observer_ptr<> more equivilant to boosts weak_ptr.
