Separated reference counting from Resources

Former-commit-id: 7380818cfee9e249c11fd15da9ff7883a6e76565

include/Nazara/Core/ObjectRef.hpp

@@ -0,0 +1,45 @@
+// Copyright (C) 2014 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_RESOURCEREF_HPP
+#define NAZARA_RESOURCEREF_HPP
+
+#include <Nazara/Prerequesites.hpp>
+#include <Nazara/Core/RefCounted.hpp>
+#include <type_traits>
+
+template<typename T>
+class NzObjectRef
+{
+	static_assert(std::is_base_of<NzRefCounted, T>::value, "ObjectRef shall only be used with RefCounted-derived type");
+
+	public:
+		NzObjectRef();
+		NzObjectRef(T* resource);
+		NzObjectRef(const NzObjectRef& ref);
+		NzObjectRef(NzObjectRef&& ref) noexcept;
+		~NzObjectRef();
+
+		bool IsValid() const;
+		T* Release();
+		bool Reset(T* resource = nullptr);
+		NzObjectRef& Swap(NzObjectRef& ref);
+
+		operator bool() const;
+		operator T*() const;
+		T* operator->() const;
+
+		NzObjectRef& operator=(T* resource);
+		NzObjectRef& operator=(const NzObjectRef& ref);
+		NzObjectRef& operator=(NzObjectRef&& ref) noexcept;
+
+	private:
+		T* m_resource;
+};
+
+#include <Nazara/Core/ObjectRef.inl>
+
+#endif // NAZARA_RESOURCEREF_HPP