physicalsocketserver.h

由GOOGLE的JINGLE项目中移植的网络库

/*
 * libjingle
 * Copyright 2004--2005, Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice, 
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products 
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 */

#ifndef __PHYSICALSOCKETSERVER_H__
#define __PHYSICALSOCKETSERVER_H__

#include "asyncfile.h"
#include "socketserver.h"
#include "criticalsection.h"
#include <vector>

#ifdef POSIX
typedef int SOCKET;
#endif // POSIX

namespace cricket { 

class Dispatcher;
class Signaler;

// A socket server that provides the real sockets of the underlying OS.
class PhysicalSocketServer : public SocketServer {
public:
  PhysicalSocketServer();
  virtual ~PhysicalSocketServer();

  // SocketFactory:
  virtual Socket* CreateSocket(int type);
  virtual AsyncSocket* CreateAsyncSocket(int type);

  // Internal Factory for Accept
  AsyncSocket* WrapSocket(SOCKET s);

  // SocketServer:
  virtual bool Wait(int cms, bool process_io);
  virtual void WakeUp();

  void Add(Dispatcher* dispatcher);
  void Remove(Dispatcher* dispatcher);

#ifdef POSIX
  AsyncFile* CreateFile(int fd);
#endif

private:
  std::vector<Dispatcher*> dispatchers_;
  Signaler* signal_wakeup_;
  CriticalSection crit_;
  bool fWait_;
  uint32 last_tick_tracked_;
  int last_tick_dispatch_count_;
};

} // namespace cricket

#endif // __PHYSICALSOCKETSERVER_H__