PeerStreamer

// -*- c++ -*-

/*

  Copyright 2003 John Knottenbelt

  This program 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 2 of the License, or

  (at your option) any later version.

  This program 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 this program; if not, write to the Free Software

  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.

*/

#if !defined __SELECT_H

#define __SELECT_H

#include <sys/select.h>                // for fd_set below

class Select;

// Selectable interface

class Selectable {

public:

  virtual void addSelectFDs(Select &) const = 0;

  virtual bool isReady(const Select &) const = 0;

};

// Class wrapping select() system call

class Select {

public:

  Select();

  void clearFDs();

  void addReadFD(int fd);

  void addWriteFD(int fd);

  void addExceptFD(int fd);

  void addAlarm(long tv_sec, long tv_usec);

  int wait();

  bool readyToRead(int fd) const;

  bool readyToWrite(int fd) const;

  bool readyToExcept(int fd) const;

private:

  int maxFD;

  fd_set readfds, writefds, exceptfds;

  long tv_sec, tv_usec;

  void setMaxFD(int fd);

};

#endif