Separated reference counting from Resources

Former-commit-id: 7380818cfee9e249c11fd15da9ff7883a6e76565

include/Nazara/Core/RefCounted.hpp

@@ -0,0 +1,58 @@
+// 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_REFCOUNTED_HPP
+#define NAZARA_REFCOUNTED_HPP
+
+#include <Nazara/Prerequesites.hpp>
+#include <atomic>
+#include <unordered_map>
+
+#if NAZARA_CORE_THREADSAFE && NAZARA_THREADSAFETY_REFCOUNTED
+	#include <Nazara/Core/ThreadSafety.hpp>
+#else
+	#include <Nazara/Core/ThreadSafetyOff.hpp>
+#endif
+
+class NzObjectListener;
+
+class NAZARA_API NzRefCounted
+{
+	public:
+		NzRefCounted(bool persistent = true);
+		virtual ~NzRefCounted();
+
+		void AddObjectListener(NzObjectListener* listener, int index = 0) const;
+		void AddReference() const;
+
+		unsigned int GetReferenceCount() const;
+
+		bool IsPersistent() const;
+
+		void RemoveObjectListener(NzObjectListener* listener) const;
+		bool RemoveReference() const;
+
+		bool SetPersistent(bool persistent = true, bool checkReferenceCount = false);
+
+	protected:
+		void NotifyCreated();
+		void NotifyDestroy();
+		void NotifyModified(unsigned int code);
+
+	private:
+		using ObjectListenerMap = std::unordered_map<NzObjectListener*, std::pair<int, unsigned int>>;
+
+		void RemoveObjectListenerIterator(ObjectListenerMap::iterator iterator) const;
+
+		NazaraMutexAttrib(m_mutex, mutable)
+
+		mutable ObjectListenerMap m_objectListeners;
+		        std::atomic_bool m_persistent;
+		mutable std::atomic_uint m_referenceCount;
+		        bool m_objectListenersLocked;
+};
+
+#endif // NAZARA_RESOURCE_HPP