ClientKeepAliveSender.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <client/ClientKeepAliveSender.h>
#include <client/ScorchedClient.h>
#include <coms/ComsKeepAliveMessage.h>
#include <coms/ComsMessageSender.h>
#include <net/NetInterface.h>
#include <common/OptionsScorched.h>
#include <common/Logger.h>
#include <time.h>

ClientKeepAliveSender *ClientKeepAliveSender::instance_ = 0;

ClientKeepAliveSender *ClientKeepAliveSender::instance()
{
        if (!instance_)
        {
                instance_ = new ClientKeepAliveSender;
        }
        return instance_;
}

ClientKeepAliveSender::ClientKeepAliveSender() : 
        lastSendTime_(0), recvMessage_(true), sendThread_(0)
{
        ComsKeepAliveMessage message;
        message.writeTypeMessage(buffer_);
        message.writeMessage(buffer_);
        buffer_.compressBuffer();
}

ClientKeepAliveSender::~ClientKeepAliveSender()
{
}

void ClientKeepAliveSender::sendKeepAlive()
{
        if (ScorchedClient::instance()->getOptionsGame().getKeepAliveTimeoutTime() == 0)
        {
                return;
        }

        if (sendThread_)
        {
                return;
        }

        lastSendTime_ = (unsigned int) time(0);

        // Create the processing thread
        sendThread_ = SDL_CreateThread(ClientKeepAliveSender::sendThreadFunc, 0);
        if (sendThread_ == 0)
        {
                Logger::log(S3D::formatStringBuffer("ClientKeepAliveSender: Failed to create send thread"));
                return;
        }       
}

int ClientKeepAliveSender::sendThreadFunc(void *)
{
        while (true)
        {
                SDL_Delay(500);
                instance_->send();
        }
        return 1;
}

void ClientKeepAliveSender::send()
{
        unsigned int sendTime = (unsigned int)
                ScorchedClient::instance()->getOptionsGame().getKeepAliveTime();
        unsigned int theTime = (unsigned int) time(0);

        if (theTime - lastSendTime_ >= sendTime)
        {
                if (theTime - lastSendTime_ >= sendTime + 5)
                {
                        Logger::log("Warning: Keepalive sender falling behind");
                }

                // Use this directly as it is thread safe
                if (ScorchedClient::instance()->getNetInterface().started())
                {
                        ScorchedClient::instance()->getNetInterface().sendMessageServer(
                                buffer_, NetInterfaceFlags::fAsync);
                }

                lastSendTime_ = theTime;
        }
}

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