main-test-sync.cc

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2008 University of Washington
 *
 * 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
 */

#include "ns3/command-line.h"
#include "ns3/simulator.h"
#include "ns3/realtime-simulator-impl.h"
#include "ns3/nstime.h"
#include "ns3/log.h"
#include "ns3/system-thread.h"
#include "ns3/string.h"
#include "ns3/config.h"
#include "ns3/global-value.h"
#include "ns3/ptr.h"

#include <chrono>  // seconds, milliseconds
#include <thread>  // sleep_for

using namespace ns3;


NS_LOG_COMPONENT_DEFINE ("TestSync");

namespace {

bool gFirstRun = false;

void
inserted_function (void)
{
  NS_ASSERT (gFirstRun);
  NS_LOG_UNCOND ("inserted_function() called at " <<
                 Simulator::Now ().GetSeconds () << " s");
}

void
background_function (void)
{
  NS_ASSERT (gFirstRun);
  NS_LOG_UNCOND ("background_function() called at " <<
                 Simulator::Now ().GetSeconds () << " s");
}

void
first_function (void)
{
  NS_LOG_UNCOND ("first_function() called at " <<
                 Simulator::Now ().GetSeconds () << " s");
  gFirstRun = true;
}

class FakeNetDevice
{
public:
  FakeNetDevice ();
  void Doit3 (void);
};

FakeNetDevice::FakeNetDevice ()
{
  NS_LOG_FUNCTION_NOARGS ();
}

void
FakeNetDevice::Doit3 (void)
{
  NS_LOG_FUNCTION_NOARGS ();
  std::this_thread::sleep_for (std::chrono::seconds (1));

  for (uint32_t i = 0; i < 10000; ++i)
    {
      //
      // Exercise the realtime relative now path
      //
      Simulator::ScheduleWithContext (Simulator::NO_CONTEXT, Seconds (0.0), MakeEvent (&inserted_function));
      std::this_thread::sleep_for (std::chrono::milliseconds (1));
    }
}

void
test (void)
{
  GlobalValue::Bind ("SimulatorImplementationType",
                     StringValue ("ns3::RealtimeSimulatorImpl"));

  FakeNetDevice fnd;

  //
  // Make sure ScheduleNow works when the system isn't running
  //
  Simulator::ScheduleWithContext (0xffffffff, Seconds (0.0), MakeEvent (&first_function));

  //
  // drive the progression of m_currentTs at a ten millisecond rate from the main thread
  //
  for (double d = 0.; d < 14.999; d += 0.01)
    {
      Simulator::Schedule (Seconds (d), &background_function);
    }

  Ptr<SystemThread> st3 = Create<SystemThread> (
    MakeCallback (&FakeNetDevice::Doit3, &fnd));
  st3->Start ();

  Simulator::Stop (Seconds (15.0));
  Simulator::Run ();
  st3->Join ();
  Simulator::Destroy ();
}

}  // unnamed namespace


int
main (int argc, char *argv[])
{
  CommandLine cmd (__FILE__);
  cmd.Parse (argc, argv);

  while (true)
    {
      test ();
    }
}