project64/Source/Common/SmartPointer.h

#pragma once

// The template class definition for smart pointer
template<class _Ty>
class AUTO_PTR
{
public:
    typedef _Ty element_type;
    // CTOR
    explicit AUTO_PTR(_Ty *pVal = 0) throw() :
        m_Owns(pVal != 0),
        m_AutoPtr(pVal)

    {
    }

    // Copy CTOR
    AUTO_PTR(const AUTO_PTR<_Ty>& ptrCopy) throw() :
        m_Owns(ptrCopy.m_Owns),
        m_AutoPtr(ptrCopy.release())
    {
    }

    // Overloading = operator
    AUTO_PTR<_Ty>& operator=(AUTO_PTR<_Ty>& ptrCopy) throw()
    {
        if (this != &ptrCopy)
        {
            if (m_AutoPtr != ptrCopy.get())
            {
                if (m_Owns)
                {
                    delete m_AutoPtr;
                }
                m_Owns = ptrCopy.m_Owns;
            }
            else if (ptrCopy.m_Owns)
            {
                m_Owns = true;
            }
            m_AutoPtr = ptrCopy.release();
        }
        return (*this);
    }
    // DTOR
    ~AUTO_PTR()
    {
        if (m_Owns)
        {
            delete m_AutoPtr;
        }
    }
    // Overloading * operator
    _Ty& operator*() const throw()
    {
        return (*get());
    }

    // Overloading -> operator
    _Ty *operator->() const throw()
    {
        return (get());
    }

    // Function to get the pointer to the class
    _Ty *get() const throw()
    {
        return (m_AutoPtr);
    }

    // Function to get the pointer to the class and take ownership
    _Ty *release() const throw()
    {
        ((AUTO_PTR<_Ty> *)this)->m_Owns = false;
        return (m_AutoPtr);
    }

    void reset(_Ty *pVal = 0) throw()
    {
        if (m_AutoPtr != pVal)
        {
            if (m_Owns)
            {
                delete m_AutoPtr;
            }
            m_AutoPtr = pVal;
            m_Owns = pVal != NULL;
        }
    }

private:
    _Ty * m_AutoPtr;
    bool  m_Owns;
};