front_drop_queue.cpp

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#include <itpp/protocol/front_drop_queue.h>
 
 
namespace itpp
{
 
void Front_Drop_Queue::push(Packet *packet)
{
  if (debug) {
    std::cout << "Front_Drop_Queue::push_packet"
              //                << " byte_size=" << packet->bit_size()/8
              << " ptr=" << packet
              << " time=" << Event_Queue::now() << std::endl;
  }
 
  Packet *hol_packet;
  while ((!std::queue<Packet*>::empty()) &&
         ((8*bytes_in_queue + packet->bit_size()) >  8*max_bytes_in_queue)) {
    hol_packet = std::queue<Packet*>::front();
    Front_Drop_Queue::pop();
    delete hol_packet;
 
    //      TTCPPacket *tcp_packet = (TTCPPacket *) hol_packet;
    //      delete tcp_packet;
 
    if (debug) {
      std::cout << "Link_With_Input_Q::received_packet, "
                << "Packet Dropped, buffer overflow."
                << std::endl;
    }
  }
 
  bytes_in_queue += packet->bit_size() / 8;
  std::queue<Packet*>::push(packet);
 
}
 
void Front_Drop_Queue::pop()
{
  Packet *hol_packet;
  hol_packet = std::queue<Packet*>::front();
  bytes_in_queue -= (hol_packet->bit_size() / 8);
  if (debug) {
    std::cout << "Front_Drop_Queue::pop_packet"
              << " ptr=" << hol_packet
              << " time=" << Event_Queue::now() << std::endl;
  }
  std::queue<Packet*>::pop();
 
}
 
} // namespace itpp