Restore symmetry between QSharedPointer and QWeakPointer on QObjects.

With the previous commit, you could create a QWeakPointer from any
QObject-derived object. It's possible because QObject now has a
pointer to the QWeakPointer's d-pointer.

However, if you did:
    QSharedPointer<QObject> obj(new QObject);
    QWeakPointer<QObject> weak1(obj);
    QWeakPointer<QObject> weak2(obj.data());

Then weak1 would shared d-pointers with QSharedPointer, but weak2
wouldn't. Also, weak1.toStrongRef() would work, but
weak2.toStrongRef() wouldn't.

This change makes QObject know where the d-pointer created by
QSharedPointer is, so weak2 would get the same d-pointer.

As a nice side-effect, you can check if a given QObject is shared by
trying to promote its QWeakPointer to QSharedPointer.

Reviewed-by: Bradley T. Hughes

0 files changed, 0 insertions, 0 deletions