queuedConnectionReader.h

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file queuedConnectionReader.h
 * @author drose
 * @date 2000-02-08
 */

#ifndef QUEUEDCONNECTIONREADER_H
#define QUEUEDCONNECTIONREADER_H

#include "pandabase.h"

#include "connectionReader.h"
#include "netDatagram.h"
#include "queuedReturn.h"
#include "lightMutex.h"
#include "pdeque.h"

EXPORT_TEMPLATE_CLASS(EXPCL_PANDA_NET, EXPTP_PANDA_NET, QueuedReturn<NetDatagram>);

/**
 * This flavor of ConnectionReader will read from its sockets and queue up all
 * of the datagrams read for later receipt by the client code.  This class is
 * useful for client code that doesn't want to deal with threading and is
 * willing to poll for datagrams at its convenience.
 */
class EXPCL_PANDA_NET QueuedConnectionReader : public ConnectionReader,
                               public QueuedReturn<NetDatagram> {
PUBLISHED:
  explicit QueuedConnectionReader(ConnectionManager *manager, int num_threads);
  virtual ~QueuedConnectionReader();

  BLOCKING bool data_available();
  bool get_data(NetDatagram &result);
  bool get_data(Datagram &result);

protected:
  virtual void receive_datagram(const NetDatagram &datagram);

#ifdef SIMULATE_NETWORK_DELAY
PUBLISHED:
  void start_delay(double min_delay, double max_delay);
  void stop_delay();

private:
  void get_delayed();
  void delay_datagram(const NetDatagram &datagram);

  class DelayedDatagram {
  public:
    double _reveal_time;
    NetDatagram _datagram;
  };

  LightMutex _dd_mutex;
  typedef pdeque<DelayedDatagram> Delayed;
  Delayed _delayed;
  bool _delay_active;
  double _min_delay, _delay_variance;

#endif  // SIMULATE_NETWORK_DELAY
};

#endif