// Filename: nodePointerToBase.h
// Created by:  drose (07May05)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////

#ifndef NODEPOINTERTOBASE_H
#define NODEPOINTERTOBASE_H

#include "pandabase.h"
#include "pointerToVoid.h"
#include "nodeCachedReferenceCount.h"
#include "memoryUsage.h"
#include "config_express.h"

////////////////////////////////////////////////////////////////////
//       Class : NodePointerToBase
// Description : This is similar to PointerToBase, but it manages
//               objects of type NodeCachedReferenceCount, and it
//               updates the node_ref_count instead of the regular
//               ref_count.  It is intended for use only in PandaNode,
//               to hold a pointer to RenderState and TransformState,
//               although it could be used by any object that wanted
//               to maintain a separate reference count for reporting
//               purposes.
////////////////////////////////////////////////////////////////////
template <class T>
class NodePointerToBase : public PointerToVoid {
public:
  typedef T To;

protected:
  INLINE NodePointerToBase(To *ptr);
  INLINE NodePointerToBase(const NodePointerToBase<T> &copy);
  INLINE ~NodePointerToBase();

  void reassign(To *ptr);
  INLINE void reassign(const NodePointerToBase<To> &copy);

  // No assignment or retrieval functions are declared in
  // NodePointerToBase, because we will have to specialize on const
  // vs. non-const later.

PUBLISHED:
  INLINE void clear();

  void output(ostream &out) const;
};

template<class T>
INLINE ostream &operator <<(ostream &out, const NodePointerToBase<T> &pointer) {
  pointer.output(out);
  return out;
}

#include "nodePointerToBase.I"

#endif