/usr/include/gdcm-2.8/gdcmObject.h is in libgdcm2-dev 2.8.4-1build2.
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 | /*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html 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 notice for more information.
=========================================================================*/
#ifndef GDCMOBJECT_H
#define GDCMOBJECT_H
#include "gdcmTypes.h"
#include <assert.h>
#include <iostream> // grrrr
//namespace std { class ostream; }
namespace gdcm
{
template<class ObjectType> class SmartPointer;
/**
* \brief Object
*
* \note main superclass for object that want to use SmartPointer
* invasive ref counting system
*
* \see SmartPointer
*/
class GDCM_EXPORT Object
{
template <class ObjectType> friend class SmartPointer;
friend std::ostream& operator<<(std::ostream &os, const Object &obj);
public:
Object():ReferenceCount(0) {}
// Implementation note:
// If I move ~Object in the protected section I can prevent people
// from writing:
// SmartPointer<Object> p = new Object;
// delete p; // due to SmartPointer::operator ObjectType * () const
// but on the other hand one could not define an Object on the stack
// Object obj;
// Furthermore it would not prevent anyone from doing:
// class MyObject : public Object {};
// SmartPointer<MyObject> o = new MyObject;
// delete o; // grrrrrr
virtual ~Object() {
// If your debugger reach here it means you are doing something silly
// like using SmartPointer on object allocated on the stack (vs heap)
assert(ReferenceCount == 0);
}
// http://www.parashift.com/c++-faq-lite/freestore-mgmt.html#faq-16.24
// Set the ref count to 0
// Do NOT copy the reference count !
/// Special requirement for copy/cstor, assignment operator
Object(const Object&):ReferenceCount(0){}
void operator=(const Object&){}
//static Object* New() { return new Object; }
protected:
// For the purpose of the invasive SmartPointer implementation
void Register() {
ReferenceCount++;
assert( ReferenceCount > 0 );
}
void UnRegister() {
assert( ReferenceCount > 0 );
ReferenceCount--;
if(!ReferenceCount)
{
delete this;
}
}
public:
// For dealing with printing of object and polymorphism
virtual void Print(std::ostream &) const {}
private:
long ReferenceCount;
};
//----------------------------------------------------------------------------
// function do not carry vtable. Thus define in the base class the operator
// and use the member function ->Print() to call the appropriate function
// NOTE: All subclass of Object needs to implement the Print function
inline std::ostream& operator<<(std::ostream &os, const Object &obj)
{
obj.Print(os);
return os;
}
} // end namespace gdcm
#endif //GDCMOBJECT_H
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