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GpCommon/GpComPtr.h

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+#pragma once
+
+template<class T>
+class GpComPtr final
+{
+public:
+	GpComPtr();
+	const GpComPtr(const GpComPtr<T> &other);
+	explicit GpComPtr(T *ptr);
+	~GpComPtr();
+
+	GpComPtr<T> &operator=(const GpComPtr<T> &other);
+	GpComPtr<T> &operator=(T *other);
+
+	bool operator==(const GpComPtr<T> &other) const;
+	bool operator!=(const GpComPtr<T> &other) const;
+
+	bool operator==(const T *other) const;
+	bool operator!=(const T *other) const;
+
+	operator T*() const;
+	T *operator->() const;
+
+	T **GetMutablePtr();
+
+private:
+	T *m_ptr;
+};
+
+template<class T>
+inline GpComPtr<T>::GpComPtr()
+	: m_ptr(nullptr)
+{
+}
+
+template<class T>
+inline GpComPtr<T>::GpComPtr(const GpComPtr<T> &other)
+	: m_ptr(other.m_ptr)
+{
+	if (m_ptr)
+		m_ptr->AddRef();
+}
+
+template<class T>
+inline GpComPtr<T>::GpComPtr(T *ptr)
+	: m_ptr(ptr)
+{
+	if (ptr)
+		ptr->AddRef();
+}
+
+template<class T>
+inline GpComPtr<T>::~GpComPtr()
+{
+	if (m_ptr)
+		m_ptr->Release();
+}
+
+template<class T>
+inline GpComPtr<T> &GpComPtr<T>::operator=(const GpComPtr<T> &other)
+{
+	(*this) = other.m_ptr;
+	return *this;
+}
+
+template<class T>
+inline GpComPtr<T> &GpComPtr<T>::operator=(T *other)
+{
+	if (other)
+		other->AddRef();
+
+	if (m_ptr)
+		m_ptr->Release();
+
+	m_ptr = other;
+
+	return *this;
+}
+
+template<class T>
+inline bool GpComPtr<T>::operator==(const GpComPtr<T> &other) const
+{
+	return m_ptr == other.m_ptr;
+}
+
+template<class T>
+inline bool GpComPtr<T>::operator!=(const GpComPtr<T> &other) const
+{
+	return !((*this) == other);
+}
+
+template<class T>
+inline bool GpComPtr<T>::operator==(const T *other) const
+{
+	return m_ptr == other;
+}
+
+template<class T>
+inline bool GpComPtr<T>::operator!=(const T *other) const
+{
+	return !((*this) == other);
+}
+
+template<class T>
+T **GpComPtr<T>::GetMutablePtr()
+{
+	return &m_ptr;
+}
+
+template<class T>
+inline GpComPtr<T>::operator T*() const
+{
+	return m_ptr;
+}
+
+template<class T>
+inline T *GpComPtr<T>::operator->() const
+{
+	return m_ptr;
+}