face-counters.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NFD_DAEMON_FACE_FACE_COUNTERS_HPP
#define NFD_DAEMON_FACE_FACE_COUNTERS_HPP

#include "common.hpp"

namespace nfd {

// PacketCounter is noncopyable, because increment should be called on the counter,
// not a copy of it; it's implicitly convertible to uint64_t to be observed
class PacketCounter : noncopyable
{
public:
  typedef uint64_t rep;

  PacketCounter()
    : m_value(0)
  {
  }

  operator rep() const
  {
    return m_value;
  }

  PacketCounter&
  operator++()
  {
    ++m_value;
    return *this;
  }
  // postfix ++ operator is not provided because it's not needed

  void
  set(rep value)
  {
    m_value = value;
  }

private:
  rep m_value;
};

// ByteCounter is noncopyable, because increment should be called on the counter,
// not a copy of it; it's implicitly convertible to uint64_t to be observed
class ByteCounter : noncopyable
{
public:
  typedef uint64_t rep;

  ByteCounter()
    : m_value(0)
  {
  }

  operator rep() const
  {
    return m_value;
  }

  ByteCounter&
  operator+=(rep n)
  {
    m_value += n;
    return *this;
  }

  void
  set(rep value)
  {
    m_value = value;
  }

private:
  rep m_value;
};

class NetworkLayerCounters : noncopyable
{
public:
  const PacketCounter&
  getNInInterests() const
  {
    return m_nInInterests;
  }

  PacketCounter&
  getNInInterests()
  {
    return m_nInInterests;
  }

  const PacketCounter&
  getNInDatas() const
  {
    return m_nInDatas;
  }

  PacketCounter&
  getNInDatas()
  {
    return m_nInDatas;
  }

  const PacketCounter&
  getNOutInterests() const
  {
    return m_nOutInterests;
  }

  PacketCounter&
  getNOutInterests()
  {
    return m_nOutInterests;
  }

  const PacketCounter&
  getNOutDatas() const
  {
    return m_nOutDatas;
  }

  PacketCounter&
  getNOutDatas()
  {
    return m_nOutDatas;
  }

protected:
  template<typename R>
  void
  copyTo(R& recipient) const
  {
    recipient.setNInInterests(this->getNInInterests());
    recipient.setNInDatas(this->getNInDatas());
    recipient.setNOutInterests(this->getNOutInterests());
    recipient.setNOutDatas(this->getNOutDatas());
  }

private:
  PacketCounter m_nInInterests;
  PacketCounter m_nInDatas;
  PacketCounter m_nOutInterests;
  PacketCounter m_nOutDatas;
};

class LinkLayerCounters : noncopyable
{
public:
  const ByteCounter&
  getNInBytes() const
  {
    return m_nInBytes;
  }

  ByteCounter&
  getNInBytes()
  {
    return m_nInBytes;
  }

  const ByteCounter&
  getNOutBytes() const
  {
    return m_nOutBytes;
  }

  ByteCounter&
  getNOutBytes()
  {
    return m_nOutBytes;
  }

protected:
  template<typename R>
  void
  copyTo(R& recipient) const
  {
    recipient.setNInBytes(this->getNInBytes());
    recipient.setNOutBytes(this->getNOutBytes());
  }

private:
  ByteCounter m_nInBytes;
  ByteCounter m_nOutBytes;
};

class FaceCounters : public NetworkLayerCounters, public LinkLayerCounters
{
public:
  template<typename R>
  void
  copyTo(R& recipient) const
  {
    this->NetworkLayerCounters::copyTo(recipient);
    this->LinkLayerCounters::copyTo(recipient);
  }
};

} // namespace nfd

#endif // NFD_DAEMON_FACE_FACE_COUNTERS_HPP