00001 /*========================================================================= 00002 00003 Program: Insight Segmentation & Registration Toolkit 00004 Module: $RCSfile: itkSmartPointerForwardReference.h,v $ 00005 Language: C++ 00006 Date: $Date: 2006-03-06 15:07:34 $ 00007 Version: $Revision: 1.9 $ 00008 00009 Copyright (c) Insight Software Consortium. All rights reserved. 00010 See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. 00011 00012 This software is distributed WITHOUT ANY WARRANTY; without even 00013 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00014 PURPOSE. See the above copyright notices for more information. 00015 00016 =========================================================================*/ 00017 #ifndef __itkSmartPointerForwardReference_h 00018 #define __itkSmartPointerForwardReference_h 00019 00020 #include "itkMacro.h" 00021 #include "itkWeakPointer.h" 00022 00023 #include <iostream> 00024 00025 namespace itk 00026 { 00027 00047 template <class T> 00048 class ITK_EXPORT SmartPointerForwardReference 00049 { 00050 public: 00052 SmartPointerForwardReference () 00053 {m_Pointer = 0;} 00054 00056 SmartPointerForwardReference (const SmartPointerForwardReference<T> &p); 00057 00059 SmartPointerForwardReference (const WeakPointer<T> &p); 00060 00062 SmartPointerForwardReference (T *p); 00063 00065 ~SmartPointerForwardReference (); 00066 00068 T *operator -> () const; 00069 00071 operator T * () const; 00072 00074 T *GetPointer () const; 00075 00077 bool operator < (const SmartPointerForwardReference &r); 00078 00080 bool operator > (const SmartPointerForwardReference &r); 00081 00083 bool operator <= (const SmartPointerForwardReference &r); 00084 00086 bool operator >= (const SmartPointerForwardReference &r); 00087 00089 SmartPointerForwardReference &operator = (const SmartPointerForwardReference &r); 00090 00092 SmartPointerForwardReference &operator = (const WeakPointer<T> &r); 00093 00095 SmartPointerForwardReference &operator = (T *r); 00096 00098 T *Print (std::ostream& os) const; 00099 00100 private: 00102 T* m_Pointer; 00103 00104 void Register(); 00105 void UnRegister(); 00106 00107 }; 00108 00109 template <typename T> 00110 std::ostream& operator<< (std::ostream& os, SmartPointerForwardReference<T> p) 00111 { 00112 p.Print(os); 00113 return os; 00114 } 00115 00116 } // end namespace itk 00117 00118 #endif 00119