/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2020 Lawrence Livermore National Laboratory
 *
 * 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: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
 */

#include "ns3/fatal-error.h"
#include "ns3/assert.h"
#include "ns3/simulator.h"

#include <iostream>

/**
 * \file
 * \ingroup core-examples
 * \ingroup ptr
 * Example program illustrating use of the NS_FATAL error handlers.
 */

using namespace ns3;

void
FatalNoMsg (void)
{
  std::cerr << "\nEvent triggered fatal error without message, and continuing:"
	    << std::endl;
  NS_FATAL_ERROR_NO_MSG_CONT ();
}

void
FatalCont (void)
{
  std::cerr << "\nEvent triggered fatal error, with custom message, and continuing:"
	    << std::endl;
  NS_FATAL_ERROR_CONT ("fatal error, but continuing");
}

void
Fatal (void)
{
  std::cerr << "\nEvent triggered fatal error, with message, and terminating:"
	    << std::endl;
  NS_FATAL_ERROR ("fatal error, terminating");
}

int
main (int argc, char ** argv)
{
  // First schedule some events
  Simulator::Schedule (Seconds (1), FatalNoMsg);
  Simulator::Schedule (Seconds (2), FatalCont);
  Simulator::Schedule (Seconds (3), Fatal);
  

  // Show some errors outside of simulation time
  std::cerr << "\nFatal error with custom message, and continuing:" << std::endl;
  NS_FATAL_ERROR_CONT ("fatal error, but continuing");

  std::cerr << "\nFatal error without message, and continuing:" << std::endl;
  NS_FATAL_ERROR_NO_MSG_CONT ();
  
  // Now run the simulator
  Simulator::Run ();

  // Should not get here
  NS_FATAL_ERROR ("fatal error, terminating");
  NS_ASSERT_MSG (false, "Should not get here.");

  return 0;
}