/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 * All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "ns3/wall-clock-ms.h"

#include "ns3/packet.h"

#include "ns3/chunk-constant-data.h"

#include "ns3/chunk-udp.h"

#include "ns3/chunk-ipv4.h"

#include <iostream>

using namespace ns3;

static void 

benchPtrA (uint32_t n)

{

  ChunkConstantData data = ChunkConstantData (2000, 1);

  ChunkUdp udp;

  ChunkIpv4 ipv4;

  for (uint32_t i = 0; i < n; i++) {

      Packet p;

      p.add (&data);

      p.add (&udp);

      p.add (&ipv4);

      Packet o = p;

      o.peek (&ipv4);

      o.remove (&ipv4);

      o.peek (&udp);

      o.remove (&udp);

      o.peek (&data);

      o.remove (&data);

  }

}

static void 

benchPtrB (uint32_t n)

{

  ChunkConstantData data = ChunkConstantData (2000, 1);

  ChunkUdp udp;

  ChunkIpv4 ipv4;

  for (uint32_t i = 0; i < n; i++) {

      Packet p;

      p.add (&data);

      p.add (&udp);

      p.add (&ipv4);

  }

}

static void

ptrC2 (Packet p)

{

  ChunkConstantData data = ChunkConstantData (2000, 1);

  ChunkUdp udp;

  p.peek (&udp);

  p.remove (&udp);

  p.peek (&data);

  p.remove (&data);

}

static void 

ptrC1 (Packet p)

{

  ChunkIpv4 ipv4;

  p.peek (&ipv4);

  p.remove (&ipv4);

  ptrC2 (p);

}

static void

benchPtrC (uint32_t n)

{

  ChunkConstantData data = ChunkConstantData (2000, 1);

  ChunkUdp udp;

  ChunkIpv4 ipv4;

  for (uint32_t i = 0; i < n; i++) {

      Packet p;

      p.add (&data);

      p.add (&udp);

      p.add (&ipv4);

      ptrC1 (p);

  }

}

static void

runBench (void (*bench) (uint32_t), uint32_t n, char const *name)

{

  WallClockMs time;

  time.start ();

  (*bench) (n);

  unsigned long long deltaMs = time.end ();

  double ps = n;

  ps *= 1000;

  ps /= deltaMs;

  std::cout << name<<"=" << ps << " packets/s" << std::endl;

}

int main (int argc, char *argv[])

{

  uint32_t n = 0;

  while (argc > 0) {

      if (strncmp ("--n=", argv[0],strlen ("--n=")) == 0) {

          char const *nAscii = argv[0] + strlen ("--n=");

          n = atoi (nAscii);

      }

      argc--;

      argv++;

  }

  runBench (&benchPtrA, n, "a");

  runBench (&benchPtrB, n, "b");

  runBench (&benchPtrC, n, "c");

  return 0;

}