/*
 *  anytun
 *
 *  The secure anycast tunneling protocol (satp) defines a protocol used
 *  for communication between any combination of unicast and anycast
 *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
 *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
 *  ethernet, ip, arp ...). satp directly includes cryptography and
 *  message authentication based on the methodes used by SRTP.  It is
 *  intended to deliver a generic, scaleable and secure solution for
 *  tunneling and relaying of packets of any protocol.
 *
 *
 *  Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
 *                          Christian Pointner <satp@wirdorange.org>
 *
 *  This file is part of Anytun.
 *
 *  Anytun is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  Anytun 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 anytun.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ANYTUN_syncQueue_h_INCLUDED
#define ANYTUN_syncQueue_h_INCLUDED

#include <deque>
#include <queue>

#include "syncCommand.h"

#include "threadUtils.hpp"
#include "datatypes.h"
#include "syncServer.h"

class SyncQueue
{
public:
  SyncQueue():syncServer_(NULL) {};
  ~SyncQueue() {};
  static SyncQueue& instance();
  void setSyncServerPtr(SyncServer*);
  void push(const std::string&);
  void push(const SyncCommand&);
  std::string pop();
  bool empty();

private:
  static Mutex instMutex;
  static SyncQueue* inst;
  class instanceCleaner
  {
  public:
    ~instanceCleaner() {
      if(SyncQueue::inst != 0) {
        delete SyncQueue::inst;
      }
    }
  };
  SyncQueue(const SyncQueue& s);
  void operator=(const SyncQueue& s);
  Mutex mutex_;
  SyncServer* syncServer_;
};

extern SyncQueue& gSyncQueue;

#endif