source: code/branches/FICN/src/network/PacketBuffer.cc @ 656

/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *
 *
 *   License notice:
 *
 *   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Oliver Scheuss, (C) 2007
 *   Co-authors:
 *      ...
 *
 */

// C++ PacketBuffer
// d
// Author Oliver Scheuss

#ifndef NETWORK_PACKETBUFFER_CC
#define NETWORK_PACKETBUFFER_CC

#include <iostream>
#include "PacketBuffer.h"

namespace network{

   boost::mutex networkPacketBufferMutex;

PacketBuffer::PacketBuffer(){
  closed=false;
  first=NULL;
  last=NULL;
}
    //this is needed in order to make the packetbuffer threadsafe


bool PacketBuffer::push(ENetEvent *ev){
  boost::mutex::scoped_lock lock(networkPacketBufferMutex);
  //std::cout << "event size inside packetbuffer " << ev->packet->dataLength << std::endl;
//   if(closed)
//     return false;
  // first element?
  if(first==NULL){
    first=new QueueItem;
    last=first;
    last->next=NULL;
    // change this!!!!!!!
    last->packet = ev->packet;
    last->address = ev->peer->address;
    } else {
    //insert a new element at the bottom
    last->next = new QueueItem;
    last=last->next;
    // initialize last->next
    last->next=NULL;
    // save the packet to the new element
    last->packet = ev->packet;
    last->address = ev->peer->address;
  }
  return true;
}

ENetPacket *PacketBuffer::pop(){
  boost::mutex::scoped_lock lock(networkPacketBufferMutex);
  //std::cout << "packetbuffer pop" << std::endl;
  if(first!=NULL /*&& !closed*/){
    QueueItem *temp = first;
    // get packet
    ENetPacket *pck=first->packet;
    // remove first element
    first = first->next;
    delete temp;
    //std::cout << "pop size of packet " << pck->dataLength << std::endl;
    return pck;
  } else{
    //std::cout << "nothing to return" << std::endl;
    return NULL;
  }
}

ENetPacket *PacketBuffer::pop(ENetAddress &address){
  boost::mutex::scoped_lock lock(networkPacketBufferMutex);
  //std::cout << "packetbuffer pop(address)" << std::endl;
  if(first!=NULL /*&& !closed*/){
    QueueItem *temp = first;
    // get packet
    ENetPacket *pck=first->packet;
    address = first->address;
    // remove first element
    first = first->next;
    delete temp;
    //std::cout << "pop(address) size of packet " << pck->dataLength << std::endl;
    return pck;
  } else{
    return NULL;
  }
}

bool PacketBuffer::isEmpty(){
  return (first==NULL);
}

void PacketBuffer::print(){
  QueueItem *temp=first;
  while(temp!=NULL){
//    std::cout << temp->packet->data << std::endl;
    temp=temp->next;
  }

}

bool PacketBuffer::isClosed(){
  return closed;
}

void PacketBuffer::setClosed(bool value){
  closed=value;
  return;
}

}// namespace network

#endif