propagation-cache.h

Go to the documentation of this file.

/*
 * Copyright (c) 2012 Telum (www.telum.ru)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Kirill Andreev <andreev@telum.ru>
 */
#ifndef PROPAGATION_CACHE_H_
#define PROPAGATION_CACHE_H_
 
#include "ns3/mobility-model.h"
 
#include <map>
 
namespace ns3
{
template <class T>
class PropagationCache
{
  public:
    PropagationCache(){};
    ~PropagationCache(){};
 
    Ptr<T> GetPathData(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b, uint32_t modelUid)
    {
        PropagationPathIdentifier key = PropagationPathIdentifier(a, b, modelUid);
        auto it = m_pathCache.find(key);
        if (it == m_pathCache.end())
        {
            return nullptr;
        }
        return it->second;
    }
 
    void AddPathData(Ptr<T> data,
                     Ptr<const MobilityModel> a,
                     Ptr<const MobilityModel> b,
                     uint32_t modelUid)
    {
        PropagationPathIdentifier key = PropagationPathIdentifier(a, b, modelUid);
        NS_ASSERT(m_pathCache.find(key) == m_pathCache.end());
        m_pathCache.insert(std::make_pair(key, data));
    }
 
    void Cleanup()
    {
        for (auto i : m_pathCache)
        {
            i.second->Dispose();
        }
        m_pathCache.clear();
    }
 
  private:
    struct PropagationPathIdentifier
    {
        PropagationPathIdentifier(Ptr<const MobilityModel> a,
                                  Ptr<const MobilityModel> b,
                                  uint32_t modelUid)
            : m_srcMobility(a),
              m_dstMobility(b),
              m_spectrumModelUid(modelUid){};
        Ptr<const MobilityModel> m_srcMobility; 
        Ptr<const MobilityModel> m_dstMobility; 
        uint32_t m_spectrumModelUid;            
 
        bool operator<(const PropagationPathIdentifier& other) const
        {
            if (m_spectrumModelUid != other.m_spectrumModelUid)
            {
                return m_spectrumModelUid < other.m_spectrumModelUid;
            }
            if (std::min(m_dstMobility, m_srcMobility) !=
                std::min(other.m_dstMobility, other.m_srcMobility))
            {
                return std::min(m_dstMobility, m_srcMobility) <
                       std::min(other.m_dstMobility, other.m_srcMobility);
            }
            if (std::max(m_dstMobility, m_srcMobility) !=
                std::max(other.m_dstMobility, other.m_srcMobility))
            {
                return std::max(m_dstMobility, m_srcMobility) <
                       std::max(other.m_dstMobility, other.m_srcMobility);
            }
            return false;
        }
    };
 
    typedef std::map<PropagationPathIdentifier, Ptr<T>> PathCache;
 
  private:
    PathCache m_pathCache; 
};
} // namespace ns3
 
#endif // PROPAGATION_CACHE_H_