diff --git a/components/resource/objectcache.hpp b/components/resource/objectcache.hpp
index e1caa4123..72db835e8 100644
--- a/components/resource/objectcache.hpp
+++ b/components/resource/objectcache.hpp
@@ -73,6 +73,15 @@ class ObjectCache : public osg::Referenced
         /** call node->accept(nv); for all nodes in the objectCache. */
         void accept(osg::NodeVisitor& nv);
 
+        /** call operator()(osg::Object*) for each object in the cache. */
+        template <class Functor>
+        void call(Functor& f)
+        {
+            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
+            for (ObjectCacheMap::iterator it = _objectCache.begin(); it != _objectCache.end(); ++it)
+                f(it->second.first.get());
+        }
+
         /** Get the number of objects in the cache. */
         unsigned int getCacheSize() const;