00001 /*========================================================================= 00002 00003 Program: Visualization Toolkit 00004 Module: $RCSfile: vtkSmartPointerBase.h,v $ 00005 00006 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 00007 All rights reserved. 00008 See Copyright.txt or http://www.kitware.com/Copyright.htm for details. 00009 00010 This software is distributed WITHOUT ANY WARRANTY; without even 00011 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00012 PURPOSE. See the above copyright notice for more information. 00013 00014 =========================================================================*/ 00025 #ifndef __vtkSmartPointerBase_h 00026 #define __vtkSmartPointerBase_h 00027 00028 #include "vtkObjectBase.h" 00029 00030 class VTK_COMMON_EXPORT vtkSmartPointerBase 00031 { 00032 public: 00034 vtkSmartPointerBase(); 00035 00037 vtkSmartPointerBase(vtkObjectBase* r); 00038 00041 vtkSmartPointerBase(const vtkSmartPointerBase& r); 00042 00044 ~vtkSmartPointerBase(); 00045 00047 00049 vtkSmartPointerBase& operator=(vtkObjectBase* r); 00050 vtkSmartPointerBase& operator=(const vtkSmartPointerBase& r); 00052 00054 00055 vtkObjectBase* GetPointer() const 00056 { 00057 // Inline implementation so smart pointer comparisons can be fully 00058 // inlined. 00059 return this->Object; 00060 } 00062 protected: 00063 00064 // Internal utility methods. 00065 void Swap(vtkSmartPointerBase& r); 00066 void Register(); 00067 void UnRegister(); 00068 00069 // Pointer to the actual object. 00070 vtkObjectBase* Object; 00071 }; 00072 00073 //---------------------------------------------------------------------------- 00074 // Need to use vtkstd_bool type because std::less requires bool return 00075 // type from operators. This example should not be used to justify 00076 // using bool elsewhere in VTK. 00077 00078 #define VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(op) \ 00079 inline vtkstd_bool \ 00080 operator op (const vtkSmartPointerBase& l, const vtkSmartPointerBase& r) \ 00081 { \ 00082 return (static_cast<void*>(l.GetPointer()) op \ 00083 static_cast<void*>(r.GetPointer())); \ 00084 } \ 00085 inline vtkstd_bool \ 00086 operator op (vtkObjectBase* l, const vtkSmartPointerBase& r) \ 00087 { \ 00088 return (static_cast<void*>(l) op static_cast<void*>(r.GetPointer())); \ 00089 } \ 00090 inline vtkstd_bool \ 00091 operator op (const vtkSmartPointerBase& l, vtkObjectBase* r) \ 00092 { \ 00093 return (static_cast<void*>(l.GetPointer()) op static_cast<void*>(r)); \ 00094 } 00095 00096 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(==) 00097 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(!=) 00098 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(<) 00099 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(<=) 00100 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(>) 00101 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(>=) 00102 00103 #undef VTK_SMART_POINTER_BASE_DEFINE_OPERATOR 00104 00106 00107 VTK_COMMON_EXPORT ostream& operator << (ostream& os, 00108 const vtkSmartPointerBase& p); 00110 00111 #endif