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 00064 void Report(vtkGarbageCollector* collector, const char* desc); 00065 00066 protected: 00067 00068 // Initialize smart pointer to given object, but do not increment 00069 // reference count. The destructor will still decrement the count. 00070 // This effectively makes it an auto-ptr. 00071 class NoReference {}; 00072 vtkSmartPointerBase(vtkObjectBase* r, const NoReference&); 00073 00074 // Pointer to the actual object. 00075 vtkObjectBase* Object; 00076 00077 private: 00078 // Internal utility methods. 00079 void Swap(vtkSmartPointerBase& r); 00080 void Register(); 00081 }; 00082 00083 //---------------------------------------------------------------------------- 00084 // Need to use vtkstd_bool type because std: :less requires bool return 00085 // type from operators. This example should not be used to justify 00086 // using bool elsewhere in VTK. 00087 00088 #define VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(op) \ 00089 inline vtkstd_bool \ 00090 operator op (const vtkSmartPointerBase& l, const vtkSmartPointerBase& r) \ 00091 { \ 00092 return (static_cast<void*>(l.GetPointer()) op \ 00093 static_cast<void*>(r.GetPointer())); \ 00094 } \ 00095 inline vtkstd_bool \ 00096 operator op (vtkObjectBase* l, const vtkSmartPointerBase& r) \ 00097 { \ 00098 return (static_cast<void*>(l) op static_cast<void*>(r.GetPointer())); \ 00099 } \ 00100 inline vtkstd_bool \ 00101 operator op (const vtkSmartPointerBase& l, vtkObjectBase* r) \ 00102 { \ 00103 return (static_cast<void*>(l.GetPointer()) op static_cast<void*>(r)); \ 00104 } 00105 00106 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(==) 00107 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(!=) 00108 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(<) 00109 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(<=) 00110 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(>) 00111 VTK_SMART_POINTER_BASE_DEFINE_OPERATOR(>=) 00112 00113 #undef VTK_SMART_POINTER_BASE_DEFINE_OPERATOR 00114 00116 00117 VTK_COMMON_EXPORT ostream& operator << (ostream& os, 00118 const vtkSmartPointerBase& p); 00120 00121 #endif
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