/usr/include/InsightToolkit/Common/itkSmartPointer.h is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkSmartPointer.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkSmartPointer_h
#define __itkSmartPointer_h
#include <iostream>
namespace itk
{
/** \class SmartPointer
* \brief Implements transparent reference counting.
*
* SmartPointer implements reference counting by overloading
* operator -> (and *) among others. This allows natural interface
* to the class referred to by the pointer without having to invoke
* special Register()/UnRegister() methods directly.
*
* To compile / test this class
* Windows: cl SmartPointerTest.cxx; .\SmartPointerTest.exe
* linux: c++ SmartPointerTest.cxx ./a.out
* other: CCcompiler SmartPointerTest.cxx ./a.out
*
* \ingroup ITKSystemObjects
* \ingroup DataAccess
*/
template <class TObjectType>
class SmartPointer
{
public:
typedef TObjectType ObjectType;
/** Constructor */
SmartPointer ()
{ m_Pointer = 0; }
/** Copy constructor */
SmartPointer (const SmartPointer<ObjectType> &p):
m_Pointer(p.m_Pointer)
{ this->Register(); }
/** Constructor to pointer p */
SmartPointer (ObjectType *p):
m_Pointer(p)
{ this->Register(); }
/** Destructor */
~SmartPointer ()
{
this->UnRegister();
m_Pointer = 0;
}
/** Overload operator -> */
ObjectType *operator -> () const
{ return m_Pointer; }
/** Return pointer to object. */
operator ObjectType * () const
{ return m_Pointer; }
/** Test if the pointer has been initialized */
bool IsNotNull() const
{ return m_Pointer != 0; }
bool IsNull() const
{ return m_Pointer == 0; }
/** Template comparison operators. */
template <typename TR>
bool operator == ( TR r ) const
{ return (m_Pointer == static_cast<const ObjectType*>(r) ); }
template <typename TR>
bool operator != ( TR r ) const
{ return (m_Pointer != static_cast<const ObjectType*>(r) ); }
/** Access function to pointer. */
ObjectType *GetPointer () const
{ return m_Pointer; }
/** Comparison of pointers. Less than comparison. */
bool operator < (const SmartPointer &r) const
{ return (void*)m_Pointer < (void*) r.m_Pointer; }
/** Comparison of pointers. Greater than comparison. */
bool operator > (const SmartPointer &r) const
{ return (void*)m_Pointer > (void*) r.m_Pointer; }
/** Comparison of pointers. Less than or equal to comparison. */
bool operator <= (const SmartPointer &r) const
{ return (void*)m_Pointer <= (void*) r.m_Pointer; }
/** Comparison of pointers. Greater than or equal to comparison. */
bool operator >= (const SmartPointer &r) const
{ return (void*)m_Pointer >= (void*) r.m_Pointer; }
/** Overload operator assignment. */
SmartPointer &operator = (const SmartPointer &r)
{ return this->operator = (r.GetPointer()); }
/** Overload operator assignment. */
SmartPointer &operator = (ObjectType *r)
{
if (m_Pointer != r)
{
ObjectType* tmp = m_Pointer; //avoid recursive unregisters by retaining temporarily
m_Pointer = r;
this->Register();
if ( tmp ) { tmp->UnRegister(); }
}
return *this;
}
/** Function to print object pointed to */
ObjectType *Print (std::ostream& os) const
{
// This prints the object pointed to by the pointer
(*m_Pointer).Print(os);
return m_Pointer;
}
private:
/** The pointer to the object referrred to by this smart pointer. */
ObjectType* m_Pointer;
void Register()
{
if(m_Pointer) { m_Pointer->Register(); }
}
void UnRegister()
{
if(m_Pointer) { m_Pointer->UnRegister(); }
}
};
template <typename T>
std::ostream& operator<< (std::ostream& os, SmartPointer<T> p)
{
p.Print(os);
return os;
}
} // end namespace itk
#endif
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