Panda3D

weakPointerToVoid.h

00001 // Filename: weakPointerToVoid.h
00002 // Created by:  drose (27Sep04)
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 WEAKPOINTERTOVOID_H
00016 #define WEAKPOINTERTOVOID_H
00017 
00018 #include "pandabase.h"
00019 #include "pointerToVoid.h"
00020 #include "weakPointerCallback.h"
00021 
00022 ////////////////////////////////////////////////////////////////////
00023 //       Class : WeakPointerToVoid
00024 // Description : This is the specialization of PointerToVoid for weak
00025 //               pointers.  It needs an additional flag to indicate
00026 //               that the pointer has been deleted.
00027 ////////////////////////////////////////////////////////////////////
00028 class EXPCL_PANDAEXPRESS WeakPointerToVoid : public PointerToVoid {
00029 protected:
00030   INLINE WeakPointerToVoid();
00031   INLINE ~WeakPointerToVoid();
00032 
00033 public:
00034   INLINE void mark_deleted();
00035 
00036   INLINE void set_callback(WeakPointerCallback *callback);
00037   INLINE WeakPointerCallback *get_callback() const;
00038 
00039 PUBLISHED:
00040   INLINE bool was_deleted() const;
00041   INLINE bool is_valid_pointer() const;
00042 
00043 protected:
00044   bool _ptr_was_deleted;
00045   WeakPointerCallback *_callback;
00046 };
00047 
00048 #include "weakPointerToVoid.I"
00049 
00050 #endif
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