socketwaiter.h

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/*
    
  This file is a part of ENUt, a library containing network
  programming utilities.
  
  Copyright (C) 2006-2008  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef NUT_SOCKETWAITER_H

#define NUT_SOCKETWAITER_H

#include "nutconfig.h"
#include <errut/errorbase.h>
#include <list>

#ifdef NUTCONFIG_SUPPORT_POLL
#include <sys/poll.h>
#include <vector>
#endif // NUTCONFIG_SUPPORT_POLL

namespace nut
{

class Socket;
        
class ENUT_IMPORTEXPORT SocketWaiter : public errut::ErrorBase
{
public:
        SocketWaiter();
        SocketWaiter(const std::string &objName);
        ~SocketWaiter();

        void addSocket(Socket &s)                                                               { m_sockets.push_back(&s); }

        void removeSocket(Socket &s)                                                            { m_sockets.remove(&s); }

        void clear()                                                                            { m_sockets.clear(); }

        bool wait(int seconds = -1, int microSeconds = -1);
private:
        // make sure we can't copy a socket waiter
        SocketWaiter(const SocketWaiter &s) : errut::ErrorBase(s)                               { }
        SocketWaiter &operator=(const SocketWaiter &s)                                          { return *this; }
        
        std::string getSocketErrorString();
        std::list<Socket *> m_sockets;
#ifdef NUTCONFIG_SUPPORT_POLL
        std::vector<struct pollfd> m_pollInfo;
#endif // NUTCONFIG_SUPPORT_POLL
};
        
} // end namespace

#endif // NUT_SOCKETWAITER_H