Panda3D

weakReferenceList.h

00001 // Filename: weakReferenceList.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 WEAKREFERENCELIST_H
00016 #define WEAKREFERENCELIST_H
00017 
00018 #include "pandabase.h"
00019 #include "pset.h"
00020 #include "mutexImpl.h"
00021 
00022 class WeakPointerToVoid;
00023 
00024 ////////////////////////////////////////////////////////////////////
00025 //       Class : WeakReferenceList
00026 // Description : This is a list of WeakPointerTo's that share a
00027 //               reference to a given ReferenceCount object.  It is
00028 //               stored in a separate class since it is assumed that
00029 //               most ReferenceCount objects do not need to store this
00030 //               list at all; this avoids bloating every
00031 //               ReferenceCount object in the world with the size of
00032 //               this object.
00033 ////////////////////////////////////////////////////////////////////
00034 class EXPCL_PANDAEXPRESS WeakReferenceList {
00035 public:
00036   WeakReferenceList();
00037   ~WeakReferenceList();
00038 
00039   void add_reference(WeakPointerToVoid *ptv);
00040   void clear_reference(WeakPointerToVoid *ptv);
00041 
00042 private:  
00043   typedef pset<WeakPointerToVoid *> Pointers;
00044   Pointers _pointers;
00045   MutexImpl _lock;
00046 };
00047 
00048 #include "weakReferenceList.I"
00049 
00050 #endif
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