BusServer.h

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/* ============================================================
 *
 * This file is part of the RSB project
 *
 * Copyright (C) 2011, 2012 Jan Moringen <jmoringe@techfak.uni-bielefeld.de>
 *
 * This file may be licensed under the terms of the
 * GNU Lesser General Public License Version 3 (the ``LGPL''),
 * or (at your option) any later version.
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the LGPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the LGPL along with this
 * program. If not, go to http://www.gnu.org/licenses/lgpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The development of this software was supported by:
 *   CoR-Lab, Research Institute for Cognition and Robotics
 *     Bielefeld University
 *
 * ============================================================ */

#pragma once

#include <boost/cstdint.hpp>

#include <boost/shared_ptr.hpp>

#include <boost/asio.hpp>
#include <boost/asio/ip/tcp.hpp>

#include <rsc/logging/Logger.h>

#include "Bus.h"

#include "rsb/rsbexports.h"

namespace rsb {
namespace transport {
namespace socket {

class RSB_EXPORT BusServer : public Bus {
public:
    BusServer(boost::uint16_t          port,
              bool                     tcpnodelay,
              boost::asio::io_service& service);

    virtual ~BusServer();

    void activate();

    void deactivate();

    void handleIncoming(EventPtr         event,
                        BusConnectionPtr connection);

private:
    typedef boost::shared_ptr<boost::asio::ip::tcp::socket> SocketPtr;

    rsc::logging::LoggerPtr         logger;

    boost::asio::ip::tcp::acceptor  acceptor;
    boost::asio::io_service&        service;

    volatile bool                   active;
    volatile bool                   shutdown;

    // These two member functions have the additional ref parameter to
    // ensure that the BusServer object cannot be destroyed while
    // callbacks are executed. This also means that
    // BusServer::activate only when there is a shared_ptr owning the
    // BusServer object. See BusServer::activate().
    void acceptOne(boost::shared_ptr<BusServer> ref);

    void handleAccept(boost::shared_ptr<BusServer>     ref,
                      SocketPtr                        socket,
                      const boost::system::error_code& error);

    void suicide();
};

typedef boost::shared_ptr<BusServer> BusServerPtr;

}
}
}