GarbageCollector.h

// Copyright (c) 2015. All rights reserved to DriveEngine Team.

#pragma once

#include "Public/IExportable.h"
#include <map>
#include <mutex>

namespace DriveEngine
{
    class GarbageCollector
    {
    public:
        static GarbageCollector& GetInstance()
        {
            static GarbageCollector instance;
            return instance;
        }
        ~GarbageCollector();

    private:
        typedef std::map<const IExportable*, int> References;
        typedef std::pair<const IExportable*, int> ReferencesPair;
        References references;

        std::recursive_mutex mutex;

        GarbageCollector();
        GarbageCollector(GarbageCollector const&) = delete;
        void operator=(GarbageCollector const&) = delete;

    public:
        void Add(const IExportable* reference);
        void Delete(const IExportable* reference);
        bool IsReferenceExist(const IExportable* reference);
        void Clear();
    };
}