pending-interest.hpp

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

#include "../common.hpp"
#include "../interest.hpp"
#include "../data.hpp"
#include "../util/time.hpp"
#include "../util/scheduler.hpp"
#include "../util/scheduler-scoped-event-id.hpp"

namespace ndn {

class PendingInterest : noncopyable
{
public:
  typedef function<void(const Interest&, Data&)> OnData;
  typedef function<void(const Interest&)> OnTimeout;

  PendingInterest(shared_ptr<const Interest> interest, const OnData& onData,
                  const OnTimeout& onTimeout, Scheduler& scheduler)
    : m_interest(interest)
    , m_onData(onData)
    , m_onTimeout(onTimeout)
    , m_timeoutEvent(scheduler)
  {
    m_timeoutEvent =
      scheduler.scheduleEvent(m_interest->getInterestLifetime() > time::milliseconds::zero() ?
                              m_interest->getInterestLifetime() :
                              DEFAULT_INTEREST_LIFETIME,
                              bind(&PendingInterest::invokeTimeoutCallback, this));
  }

  const Interest&
  getInterest() const
  {
    return *m_interest;
  }

  void
  invokeDataCallback(const Data& data)
  {
    m_onData(*m_interest, const_cast<Data&>(data));
  }

  void
  setDeleter(const std::function<void()>& deleter)
  {
    m_deleter = deleter;
  }

private:
  void
  invokeTimeoutCallback()
  {
    if (m_onTimeout) {
      m_onTimeout(*m_interest);
    }

    BOOST_ASSERT(m_deleter);
    m_deleter();
  }

private:
  shared_ptr<const Interest> m_interest;
  const OnData m_onData;
  const OnTimeout m_onTimeout;
  util::scheduler::ScopedEventId m_timeoutEvent;
  std::function<void()> m_deleter;
};


class PendingInterestId;

class MatchPendingInterestId
{
public:
  explicit
  MatchPendingInterestId(const PendingInterestId* pendingInterestId)
    : m_id(pendingInterestId)
  {
  }

  bool
  operator()(const shared_ptr<const PendingInterest>& pendingInterest) const
  {
    return (reinterpret_cast<const PendingInterestId*>(
              &pendingInterest->getInterest()) == m_id);
  }
private:
  const PendingInterestId* m_id;
};


} // namespace ndn

#endif // NDN_DETAIL_PENDING_INTEREST_HPP