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nodePointerToBase.h
00001 // Filename: nodePointerToBase.h
00002 // Created by:  drose (07May05)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef NODEPOINTERTOBASE_H
00016 #define NODEPOINTERTOBASE_H
00017 
00018 #include "pandabase.h"
00019 #include "pointerToVoid.h"
00020 #include "memoryUsage.h"
00021 #include "config_express.h"
00022 
00023 ////////////////////////////////////////////////////////////////////
00024 //       Class : NodePointerToBase
00025 // Description : This is similar to PointerToBase, but it manages
00026 //               objects of type NodeReferenceCount or
00027 //               NodeCachedReferenceCount, and it updates the
00028 //               node_ref_count instead of the regular ref_count.  It
00029 //               is intended for use only in PandaNode, to hold a
00030 //               pointer to RenderState and TransformState, although
00031 //               it could be used by any object that wanted to
00032 //               maintain a separate reference count for reporting
00033 //               purposes.
00034 ////////////////////////////////////////////////////////////////////
00035 template <class T>
00036 class NodePointerToBase : public PointerToVoid {
00037 public:
00038   typedef T To;
00039 
00040 protected:
00041   INLINE NodePointerToBase(To *ptr);
00042   INLINE NodePointerToBase(const NodePointerToBase<T> &copy);
00043   INLINE ~NodePointerToBase();
00044 
00045   void reassign(To *ptr);
00046   INLINE void reassign(const NodePointerToBase<To> &copy);
00047 
00048   // No assignment or retrieval functions are declared in
00049   // NodePointerToBase, because we will have to specialize on const
00050   // vs. non-const later.
00051 
00052 PUBLISHED:
00053   INLINE void clear();
00054 
00055   void output(ostream &out) const;
00056 };
00057 
00058 template<class T>
00059 INLINE ostream &operator <<(ostream &out, const NodePointerToBase<T> &pointer) {
00060   pointer.output(out);
00061   return out;
00062 }
00063 
00064 #include "nodePointerToBase.I"
00065 
00066 #endif
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