csutil/weakreferenced.h
Go to the documentation of this file.00001 /* 00002 Crystal Space Weak Reference Counting Implementation 00003 Copyright (C) 2006 by Jorrit Tyberghein 00004 (C) 2006 by Amir Taaki 00005 00006 This library is free software; you can redistribute it and/or 00007 modify it under the terms of the GNU Library General Public 00008 License as published by the Free Software Foundation; either 00009 version 2 of the License, or (at your option) any later version. 00010 00011 This library is distributed in the hope that it will be useful, 00012 but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 Library General Public License for more details. 00015 00016 You should have received a copy of the GNU Library General Public 00017 License along with this library; if not, write to the Free 00018 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00019 */ 00020 00021 #ifndef __CS_CSUTIL_WEAKREFERENCED_H__ 00022 #define __CS_CSUTIL_WEAKREFERENCED_H__ 00023 00028 #include "array.h" 00029 00030 namespace CS 00031 { 00032 namespace Utility 00033 { 00034 00042 class WeakReferenced 00043 { 00044 public: 00045 WeakReferenced () : weakref_owners (0) {} 00046 ~WeakReferenced () 00047 { 00048 if (weakref_owners) 00049 { 00050 for (size_t i = 0; i < weakref_owners->GetSize(); i++) 00051 { 00052 *((*weakref_owners)[i]) = 0; 00053 } 00054 delete weakref_owners; 00055 } 00056 } 00057 00058 void AddRefOwner (void** ref_owner) 00059 { 00060 if (!weakref_owners) 00061 weakref_owners = new WeakRefOwnerArray (0); 00062 weakref_owners->InsertSorted (ref_owner); 00063 } 00064 void RemoveRefOwner (void** ref_owner) 00065 { 00066 if (!weakref_owners) 00067 return; 00068 00069 size_t index = weakref_owners->FindSortedKey ( 00070 csArrayCmp<void**, void**>(ref_owner)); 00071 00072 if (index != csArrayItemNotFound) 00073 weakref_owners->DeleteIndex (index); 00074 } 00075 00076 private: 00077 typedef csArray<void**, 00078 csArrayElementHandler<void**>, 00079 CS::Memory::AllocatorMalloc, 00080 csArrayCapacityLinear<csArrayThresholdFixed<4> > > WeakRefOwnerArray; 00081 WeakRefOwnerArray* weakref_owners; 00082 }; 00083 00084 } // namespace Utility 00085 } // namespace CS 00086 00087 #endif // __CS_CSUTIL_WEAKREFERENCED_H__
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