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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSmartPointerTest.cxx,v $
Language: C++
Date: $Date: 2007-08-20 13:00:21 $
Version: $Revision: 1.20 $
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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include "itkSmartPointer.h"
class itkTestObject
{
public:
typedef itk::SmartPointer<itkTestObject> Pointer;
static itkTestObject::Pointer New();
virtual void Register()
{
std::cout << "Register " << *this << " count:"
<< (m_ReferenceCount+1) << " " << std::endl;
m_ReferenceCount++;
}
virtual void UnRegister()
{
std::cout << "UnRegister " << this << " count:"
<< (m_ReferenceCount-1) << " " << std::endl;
m_ReferenceCount--;
if ( m_ReferenceCount == 0 )
{
delete this;
}
}
inline friend std::ostream &operator << (std::ostream &os,
itkTestObject const& o)
{
os << "itkTestObject " << (void const * )&o << " " << o.m_ReferenceCount;
return os;
}
std::ostream& Print(std::ostream& os) const
{
os << "itkTestObject " << (void const * )this << " " << this->m_ReferenceCount;
return os;
}
protected:
itkTestObject()
{
m_ReferenceCount = 0;
std::cout << "construct itkTestObject " << *this << std::endl;
}
virtual ~itkTestObject()
{
std::cout << "destruct itkTestObject " << *this << std::endl;
}
private:
unsigned int m_ReferenceCount;
};
itkTestObject::Pointer itkTestObject::New()
{
return itkTestObject::Pointer(new itkTestObject);
}
class itkTestObjectSubClass : public itkTestObject
{
public:
typedef itk::SmartPointer<itkTestObjectSubClass> Pointer;
static Pointer New();
};
itkTestObjectSubClass::Pointer itkTestObjectSubClass::New()
{
return itkTestObjectSubClass::Pointer(new itkTestObjectSubClass);
}
// This SHOULD NOT be used in ITK, all functions
// should take raw pointers as arguments
void TestUpCastPointer(itkTestObject::Pointer)
{
}
// Test a function that takes an itkTestObject raw pointer
void TestUpCast(itkTestObject*)
{
}
int itkSmartPointerTest(int, char* [] )
{
// Create a base class pointer to a child class
itkTestObject::Pointer to(itkTestObjectSubClass::New());
// test the safe down cast and create a child class Pointer object
itkTestObjectSubClass::Pointer sc
= dynamic_cast<itkTestObjectSubClass*>(to.GetPointer());
// Test the up cast with a function that takes a pointer
TestUpCast(sc);
// Test calling a function that takes a SmartPointer as
// an argument, note, that you have to get the raw pointer
// for this to work
TestUpCastPointer(sc.GetPointer());
// This will not work, but only in construction
//itkTestObject::Pointer p = sc;
// For construction use the constructor call:
// Test casting up the tree, note no explict cast is required
itkTestObject::Pointer p(sc);
// No cast is required for assignment
p = sc;
std::cout <<"second test" << std::endl;
{
itkTestObject::Pointer o1 = itkTestObject::New();
std::cout << "o1 " << &o1 << std::endl;
itkTestObject::Pointer o2 = itkTestObject::New();
std::cout << "o2 " << &o2 << std::endl;
itkTestObject::Pointer o3 = itkTestObject::New();
std::cout << "o3 " << &o3 << std::endl;
itkTestObject::Pointer o4 = itkTestObject::New();
std::cout << "o4 " << &o4 << std::endl;
o1 = o2;
o2 = o3;
o4 = o1;
if ( o1 < o2 )
{
std::cout << "o1 is < o2 " << o1 << " " << o2 << std::endl;
}
else
{
std::cout << "o1 is not < o2 " << &o1 << " " << &o2 << std::endl;
}
}
std::cout <<"end second test" << std::endl << std::endl;
std::cout <<"first test" << std::endl;
{
itkTestObject::Pointer o1 = itkTestObject::New();
}
std::cout <<"end first test" << std::endl << std::endl;
return EXIT_SUCCESS;
}
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