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

/*

 * Copyright (c) 2005,2006 INRIA

 *

 * 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 "simulator.h"

#include "simulator-impl.h"

#include "default-simulator-impl.h"

#include "realtime-simulator-impl.h"

#include "scheduler.h"

#include "map-scheduler.h"

#include "event-impl.h"

#include "ns3/ptr.h"

#include "ns3/string.h"

#include "ns3/object-factory.h"

#include "ns3/global-value.h"

#include "ns3/assert.h"

#include "ns3/log.h"

#include <math.h>

#include <fstream>

#include <list>

#include <vector>

#include <iostream>

NS_LOG_COMPONENT_DEFINE ("Simulator");

namespace ns3 {

GlobalValue g_simTypeImpl = GlobalValue ("SimulatorImplementationType", 

  "The object class to use as the simulator implementation",

  StringValue ("ns3::DefaultSimulatorImpl"),

  MakeStringChecker ());

#ifdef NS3_LOG_ENABLE

//

// Note:  Calls that take TimePrinter as a parameter are defined as nothing

// in the logging module if NS3_LOG_ENABLE is not defined.

// 

static void

TimePrinter (std::ostream &os)

{

  os << Simulator::Now ().GetSeconds () << "s";

}

#endif /* NS3_LOG_ENABLE */

static Ptr<SimulatorImpl> *PeekImpl (void)

{

  static Ptr<SimulatorImpl> impl = 0;

  return &impl;

}

static SimulatorImpl * GetImpl (void)

{

  Ptr<SimulatorImpl> &impl = *PeekImpl ();

  /* Please, don't include any calls to logging macros in this function

   * or pay the price, that is, stack explosions.

   */

  if (impl == 0) 

    {

      ObjectFactory factory;

      StringValue s;

      g_simTypeImpl.GetValue (s);

      factory.SetTypeId (s.Get ());

      impl = factory.Create<SimulatorImpl> ();

      Ptr<Scheduler> scheduler = CreateObject<MapScheduler> ();

      impl->SetScheduler (scheduler);

//

// Note: we call LogSetTimePrinter _after_ creating the implementation

// object because the act of creation can trigger calls to the logging 

// framework which would call the TimePrinter function which would call 

// Simulator::Now which would call Simulator::GetImpl, and, thus, get us 

// in an infinite recursion until the stack explodes.

//

      LogSetTimePrinter (&TimePrinter);

    }

  return PeekPointer (impl);

}

void

Simulator::Destroy (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  Ptr<SimulatorImpl> &impl = *PeekImpl (); 

  if (impl == 0)

    {

      return;

    }

  /* Note: we have to call LogSetTimePrinter (0) below because if we do not do

   * this, and restart a simulation after this call to Destroy, (which is 

   * legal), Simulator::GetImpl will trigger again an infinite recursion until

   * the stack explodes.

   */

  LogSetTimePrinter (0);

  impl->Destroy ();

  impl = 0;

}

void

Simulator::SetScheduler (Ptr<Scheduler> scheduler)

{

  NS_LOG_FUNCTION (scheduler);

  GetImpl ()->SetScheduler (scheduler);

}

void 

Simulator::EnableLogTo (char const *filename)

{}

bool 

Simulator::IsFinished (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  return GetImpl ()->IsFinished ();

}

Time

Simulator::Next (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  return GetImpl ()->Next ();

}

void 

Simulator::Run (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  GetImpl ()->Run ();

}

void 

Simulator::RunOneEvent (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  GetImpl ()->RunOneEvent ();

}

void 

Simulator::Stop (void)

{

  NS_LOG_LOGIC ("stop");

  GetImpl ()->Stop ();

}

void 

Simulator::Stop (Time const &time)

{

  NS_LOG_FUNCTION (time);

}

Time

Simulator::Now (void)

{

  /* Please, don't include any calls to logging macros in this function

   * or pay the price, that is, stack explosions.

   */

  return GetImpl ()->Now ();

}

Time

Simulator::GetDelayLeft (const EventId &id)

{

  NS_LOG_FUNCTION (&id);

  return GetImpl ()->GetDelayLeft (id);

}

EventId

Simulator::Schedule (Time const &time, const Ptr<EventImpl> &ev)

{

  NS_LOG_FUNCTION (time << ev);

  return DoSchedule (time, GetPointer (ev));

}

EventId

Simulator::ScheduleNow (const Ptr<EventImpl> &ev)

{

  NS_LOG_FUNCTION (ev);

  return DoScheduleNow (GetPointer (ev));

}

EventId

Simulator::ScheduleDestroy (const Ptr<EventImpl> &ev)

{

  NS_LOG_FUNCTION (ev);

  return DoScheduleDestroy (GetPointer (ev));

}

EventId 

Simulator::DoSchedule (Time const &time, EventImpl *impl)

{

  return GetImpl ()->Schedule (time, impl);

}

EventId 

Simulator::DoScheduleNow (EventImpl *impl)

{

  return GetImpl ()->ScheduleNow (impl);

}

EventId 

Simulator::DoScheduleDestroy (EventImpl *impl)

{

  return GetImpl ()->ScheduleDestroy (impl);

}

EventId

Simulator::Schedule (Time const &time, void (*f) (void))

{

  NS_LOG_FUNCTION (time << f);

  return DoSchedule (time, MakeEvent (f));

}

EventId

Simulator::ScheduleNow (void (*f) (void))

{

  NS_LOG_FUNCTION (f);

  return DoScheduleNow (MakeEvent (f));

}

EventId

Simulator::ScheduleDestroy (void (*f) (void))

{

  NS_LOG_FUNCTION (f);

  return DoScheduleDestroy (MakeEvent (f));

}

void

Simulator::Remove (const EventId &ev)

{

  NS_LOG_FUNCTION (&ev);

  return GetImpl ()->Remove (ev);

}

void

Simulator::Cancel (const EventId &ev)

{

  NS_LOG_FUNCTION (&ev);

  return GetImpl ()->Cancel (ev);

}

bool 

Simulator::IsExpired (const EventId &id)

{

  NS_LOG_FUNCTION (&id);

  return GetImpl ()->IsExpired (id);

}

Time Now (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  return Time (Simulator::Now ());

}

Time 

Simulator::GetMaximumSimulationTime (void)

{

  NS_LOG_FUNCTION_NOARGS ();

  return GetImpl ()->GetMaximumSimulationTime ();

}

void

Simulator::SetImplementation (Ptr<SimulatorImpl> impl)

{

  NS_FATAL_ERROR ("TODO");

}

Ptr<SimulatorImpl>

Simulator::GetImplementation (void)

{

  return GetImpl ();

}

} // namespace ns3

#ifdef RUN_SELF_TESTS

#include "ns3/test.h"

#include "ns3/ptr.h"

#include "list-scheduler.h"

#include "heap-scheduler.h"

namespace ns3 {

static void foo0 (void)

{}

static void foo1 (int)

{}

static void foo2 (int, int)

{}

static void foo3 (int, int, int)

{}

static void foo4 (int, int, int, int)

{}

static void foo5 (int, int, int, int, int)

{}

#if 1

static void ber1 (int &)

{}

static void ber2 (int &, int &)

{}

static void ber3 (int &, int &, int &)

{}

static void ber4 (int &, int &, int &, int &)

{}

static void ber5 (int &, int &, int &, int &, int &)

{}

#endif

static void cber1 (const int &)

{}

static void cber2 (const int &, const int &)

{}

static void cber3 (const int &, const int &, const int &)

{}

static void cber4 (const int &, const int &, const int &, const int &)

{}

static void cber5 (const int &, const int &, const int &, const int &, const int &)

{}

class SimulatorTests : public Test

{

public:

  SimulatorTests ();

  // only here for testing of Ptr<>

  void Ref (void) const;

  void Unref (void) const;

  virtual ~SimulatorTests ();

  virtual bool RunTests (void);

private:

  uint64_t NowUs ();

  bool RunOneTest (void);

  void RunTestsConst (void) const;

  void A (int a);

  void B (int b);

  void C (int c);

  void D (int d);

  void bar0 (void);

  void bar1 (int);

  void bar2 (int, int);

  void bar3 (int, int, int);

  void bar4 (int, int, int, int);

  void bar5 (int, int, int, int, int);

  void baz1 (int &);

  void baz2 (int &, int &);

  void baz3 (int &, int &, int &);

  void baz4 (int &, int &, int &, int &);

  void baz5 (int &, int &, int &, int &, int &);

  void cbaz1 (const int &);

  void cbaz2 (const int &, const int &);

  void cbaz3 (const int &, const int &, const int &);

  void cbaz4 (const int &, const int &, const int &, const int &);

  void cbaz5 (const int &, const int &, const int &, const int &, const int &);

  void bar0c (void) const;

  void bar1c (int) const;

  void bar2c (int, int) const;

  void bar3c (int, int, int) const;

  void bar4c (int, int, int, int) const;

  void bar5c (int, int, int, int, int) const;

  void baz1c (int &) const;

  void baz2c (int &, int &) const;

  void baz3c (int &, int &, int &) const;

  void baz4c (int &, int &, int &, int &) const;

  void baz5c (int &, int &, int &, int &, int &) const;

  void cbaz1c (const int &) const;

  void cbaz2c (const int &, const int &) const;

  void cbaz3c (const int &, const int &, const int &) const;

  void cbaz4c (const int &, const int &, const int &, const int &) const;

  void cbaz5c (const int &, const int &, const int &, const int &, const int &) const;

  void destroy (void);

  bool m_b;

  bool m_a;

  bool m_c;

  bool m_d;

  EventId m_idC;

  bool m_destroy;

  EventId m_destroyId;

};

SimulatorTests::SimulatorTests ()

  : Test ("Simulator")

{}

SimulatorTests::~SimulatorTests ()

{}

void 

SimulatorTests::Ref (void) const

{}

void 

SimulatorTests::Unref (void) const

{}

uint64_t

SimulatorTests::NowUs (void)

{

  uint64_t ns = Now ().GetNanoSeconds ();

  return ns / 1000;

}  

void

SimulatorTests::A (int a)

{

  m_a = false;

}

void

SimulatorTests::B (int b)

{

  if (b != 2 || NowUs () != 11) 

    {

      m_b = false;

    } 

  else 

    {

      m_b = true;

    }

  Simulator::Remove (m_idC);

  Simulator::Schedule (MicroSeconds (10), &SimulatorTests::D, this, 4);

}

void

SimulatorTests::C (int c)

{

  m_c = false;

}

void

SimulatorTests::D (int d)

{

  if (d != 4 || NowUs () != (11+10)) 

    {

      m_d = false;

    } 

  else 

    {

      m_d = true;

    }

}

void

SimulatorTests::destroy (void)

{

  if (m_destroyId.IsExpired ())

    {

      m_destroy = true; 

    }

}

void 

SimulatorTests::bar0 (void)

{}

void 

SimulatorTests::bar1 (int)