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/*!
* \file
* \brief Implementation of a Front Drop Queue class
* \author Anders Persson and Tony Ottosson
*
* -------------------------------------------------------------------------
*
* IT++ - C++ library of mathematical, signal processing, speech processing,
* and communications classes and functions
*
* Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* -------------------------------------------------------------------------
*/
#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
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