/*
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
*/

#ifndef RESOURCEMANAGER_H
#define RESOURCEMANAGER_H 1

#include <vector>
#include <algorithm>

#pragma hdrstop

class Resource
{

  public:
    virtual void Release() = 0;
    double GetLastUsage() const
    {
        return _lastUsage;
    }

  protected:
    void SetLastUsage(double lastUsage)
    {
        _lastUsage = lastUsage;
    }

  private:
    double _lastUsage;
};

class ResourceManager
{

  public:
    static void Register(Resource *resource);
    static void Unregister(Resource *resource);

    static void Sweep(double currentTime);
    static void SetExpiry(double expiry)
    {
        _expiry = expiry;
    }

  private:
    typedef std::vector<Resource *> Resources;

    static double _expiry;
    static double _lastUpdate;
    static double _lastReport;

    static Resources _resources;
};

#endif