RefCounted.hpp

// Copyright (C) 2017 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>

#if NAZARA_CORE_THREADSAFE && NAZARA_THREADSAFETY_REFCOUNTED
    #include <Nazara/Core/ThreadSafety.hpp>
#else
    #include <Nazara/Core/ThreadSafetyOff.hpp>
#endif

namespace Nz
{
    class NAZARA_CORE_API RefCounted
    {
        public:
            RefCounted(bool persistent = true);
            RefCounted(const RefCounted&) = delete;
            RefCounted(RefCounted&&) = default;
            virtual ~RefCounted();

            void AddReference() const;

            unsigned int GetReferenceCount() const;

            bool IsPersistent() const;

            bool RemoveReference() const;

            bool SetPersistent(bool persistent = true, bool checkReferenceCount = false);

            RefCounted& operator=(const RefCounted&) = delete;
            RefCounted& operator=(RefCounted&&) = default;

        private:
            std::atomic_bool m_persistent;
            mutable std::atomic_uint m_referenceCount;
    };
}

#endif // NAZARA_RESOURCE_HPP