From eb5a656f4e6177157d98d07884043cee0f23ed58 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 3 Oct 2008 13:34:32 +0000
Subject: [PATCH] From Neil Groves, added intrusive_ptr_add_ref and
 intrusive_ptr_release methods to enable usage of boost::intrusive_ptr<> with
 osg::Referenced objects.

---
 include/osg/Referenced | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/osg/Referenced b/include/osg/Referenced
index 7835ac1da..0196c3d3d 100644
--- a/include/osg/Referenced
+++ b/include/osg/Referenced
@@ -185,6 +185,10 @@ inline void Referenced::unref() const
     }
 }
 
+// intrusive_ptr_add_ref and intrusive_ptr_release allow
+// use of osg Referenced classes with boost::intrusive_ptr
+inline void intrusive_ptr_add_ref(Referenced* p) { p->ref(); }
+inline void intrusive_ptr_release(Referenced* p) { p->unref(); }
 
 #else