[directfb] Introduce the QDirectFBPointer from QWS/gfxdrivers

Introduce QDirectFBPointer and use it throughout the code to
fix various resource leaks in the DirectFB backend. Fix the surface
ownership of the IDirectFBSurface in the Blittable/BackingStore
code.

Change-Id: I0d4572eaab80b3558e644f26d76222461bf37bbb
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/plugins/platforms/directfb/qdirectfbconvenience.h b/src/plugins/platforms/directfb/qdirectfbconvenience.h
index 93d47f3644..e7c9378ece 100644
--- a/src/plugins/platforms/directfb/qdirectfbconvenience.h
+++ b/src/plugins/platforms/directfb/qdirectfbconvenience.h
@@ -81,4 +81,29 @@ private:
     friend class QDirectFbIntegration;
 };
 
+template <typename T> struct QDirectFBInterfaceCleanupHandler
+{
+    static void cleanup(T *t)
+    {
+        if (!t)
+            return;
+        t->Release(t);
+    }
+};
+
+template <typename T>
+class QDirectFBPointer : public QScopedPointer<T, QDirectFBInterfaceCleanupHandler<T> >
+{
+public:
+    QDirectFBPointer(T *t = 0)
+        : QScopedPointer<T, QDirectFBInterfaceCleanupHandler<T> >(t)
+    {}
+
+    T** outPtr()
+    {
+        this->reset(0);
+        return &this->d;
+    }
+};
+
 #endif // QDIRECTFBCONVENIENCE_H