#include <realtime-simulator-impl.h>

Inheritance diagram for ns3::RealtimeSimulatorImpl:

Collaboration diagram for ns3::RealtimeSimulatorImpl:

Public Types
enum	SynchronizationMode { SYNC_BEST_EFFORT, SYNC_HARD_LIMIT }

Public Member Functions
	RealtimeSimulatorImpl ()
	~RealtimeSimulatorImpl ()
virtual void	Cancel (const EventId &ev)
virtual void	Destroy ()
virtual uint32_t	GetContext (void) const
virtual Time	GetDelayLeft (const EventId &id) const
Time	GetHardLimit (void) const
virtual Time	GetMaximumSimulationTime (void) const
RealtimeSimulatorImpl::SynchronizationMode	GetSynchronizationMode (void) const
virtual uint32_t	GetSystemId (void) const
virtual bool	IsExpired (const EventId &ev) const
virtual bool	IsFinished (void) const
virtual Time	Now (void) const
Time	RealtimeNow (void) const
virtual void	Remove (const EventId &ev)
virtual void	Run (void)
virtual EventId	Schedule (Time const &time, EventImpl *event)
virtual EventId	ScheduleDestroy (EventImpl *event)
virtual EventId	ScheduleNow (EventImpl *event)
void	ScheduleRealtime (Time const &time, EventImpl *event)
void	ScheduleRealtimeNow (EventImpl *event)
void	ScheduleRealtimeNowWithContext (uint32_t context, EventImpl *event)
void	ScheduleRealtimeWithContext (uint32_t context, Time const &time, EventImpl *event)
virtual void	ScheduleWithContext (uint32_t context, Time const &time, EventImpl *event)
void	SetHardLimit (Time limit)
virtual void	SetScheduler (ObjectFactory schedulerFactory)
void	SetSynchronizationMode (RealtimeSimulatorImpl::SynchronizationMode mode)
virtual void	Stop (void)
virtual void	Stop (Time const &time)

Static Public Member Functions
static TypeId	GetTypeId (void)
	This method returns the TypeId associated to ns3::RealtimeSimulatorImpl.

Private Types
typedef std::list< EventId >	DestroyEvents

Private Member Functions
virtual void	DoDispose (void)
uint64_t	NextTs (void) const
void	ProcessOneEvent (void)
bool	Realtime (void) const
bool	Running (void) const

Private Attributes
uint32_t	m_currentContext
uint64_t	m_currentTs
uint32_t	m_currentUid
DestroyEvents	m_destroyEvents
Ptr< Scheduler >	m_events
Time	m_hardLimit
SystemThread::ThreadId	m_main
SystemMutex	m_mutex
bool	m_running
bool	m_stop
SynchronizationMode	m_synchronizationMode
Ptr< Synchronizer >	m_synchronizer
uint32_t	m_uid
int	m_unscheduledEvents

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
virtual void	DoDispose (void)
virtual void	DoStart (void)
virtual void	NotifyNewAggregate (void)

Detailed Description

Definition at line 38 of file realtime-simulator-impl.h.

Member Typedef Documentation

typedef std::list<EventId> ns3::RealtimeSimulatorImpl::DestroyEvents

private

Definition at line 93 of file realtime-simulator-impl.h.

Member Enumeration Documentation

enum ns3::RealtimeSimulatorImpl::SynchronizationMode

Enumeration of the types of packets supported in the class.

Enumerator:

SYNC_BEST_EFFORT
SYNC_HARD_LIMIT	Make a best effort to keep synced to real-time

Definition at line 47 of file realtime-simulator-impl.h.

Constructor & Destructor Documentation

ns3::RealtimeSimulatorImpl::RealtimeSimulatorImpl ( )

Definition at line 66 of file realtime-simulator-impl.cc.

References m_currentContext, m_currentTs, m_currentUid, m_main, m_running, m_stop, m_synchronizer, m_uid, m_unscheduledEvents, NS_LOG_FUNCTION_NOARGS, and ns3::SystemThread::Self().

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ns3::RealtimeSimulatorImpl::~RealtimeSimulatorImpl ( )

Definition at line 90 of file realtime-simulator-impl.cc.

Member Function Documentation

void ns3::RealtimeSimulatorImpl::Cancel ( const EventId & ev )

virtual

Set the cancel bit on this event: the event's associated function will not be invoked when it expires. This method has the same visible effect as the ns3::Simulator::remove method but its algorithmic complexity is much lower: it has O(1) complexity. This method has the exact same semantics as ns3::EventId::cancel. Note that it is not possible to cancel events which were scheduled for the "destroy" time. Doing so will result in a program error (crash).

Parameters

ev	the event to cancel

Implements ns3::SimulatorImpl.

Definition at line 743 of file realtime-simulator-impl.cc.

References IsExpired().

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void ns3::RealtimeSimulatorImpl::Destroy ( )

virtual

Every event scheduled by the Simulator::insertAtDestroy method is invoked. Then, we ensure that any memory allocated by the Simulator is freed. This method is typically invoked at the end of a simulation to avoid false-positive reports by a leak checker. After this method has been invoked, it is actually possible to restart a new simulation with a set of calls to Simulator::run and Simulator::insert_*.

Implements ns3::SimulatorImpl.

Definition at line 109 of file realtime-simulator-impl.cc.

References ns3::EventImpl::Invoke(), ns3::EventImpl::IsCancelled(), m_destroyEvents, NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

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void ns3::RealtimeSimulatorImpl::DoDispose ( void )

privatevirtual

Definition at line 95 of file realtime-simulator-impl.cc.

References ns3::Scheduler::Event::impl, ns3::Scheduler::IsEmpty(), m_events, m_synchronizer, NS_LOG_FUNCTION_NOARGS, ns3::Scheduler::RemoveNext(), and ns3::SimpleRefCount< T, PARENT, DELETER >::Unref().

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uint32_t ns3::RealtimeSimulatorImpl::GetContext ( void ) const

virtual

Returns: the current simulation context

Implements ns3::SimulatorImpl.

Definition at line 810 of file realtime-simulator-impl.cc.

References m_currentContext.

Referenced by Schedule(), ScheduleNow(), ScheduleRealtime(), and ScheduleRealtimeNow().

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Time ns3::RealtimeSimulatorImpl::GetDelayLeft ( const EventId & id ) const

virtual

Parameters

id	the event id to analyse

Returns: the delay left until the input event id expires. if the event is not running, this method returns zero.

Implements ns3::SimulatorImpl.

Definition at line 689 of file realtime-simulator-impl.cc.

References IsExpired(), m_currentTs, and ns3::TimeStep().

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Time ns3::RealtimeSimulatorImpl::GetHardLimit ( void ) const

Definition at line 837 of file realtime-simulator-impl.cc.

References m_hardLimit, and NS_LOG_FUNCTION_NOARGS.

Time ns3::RealtimeSimulatorImpl::GetMaximumSimulationTime ( void ) const

virtual

Returns: the maximum simulation time at which an event can be scheduled.

The returned value will always be bigger than or equal to Simulator::Now.

Implements ns3::SimulatorImpl.

Definition at line 795 of file realtime-simulator-impl.cc.

References ns3::TimeStep().

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RealtimeSimulatorImpl::SynchronizationMode ns3::RealtimeSimulatorImpl::GetSynchronizationMode ( void ) const

Definition at line 823 of file realtime-simulator-impl.cc.

References m_synchronizationMode, and NS_LOG_FUNCTION_NOARGS.

uint32_t ns3::RealtimeSimulatorImpl::GetSystemId ( void ) const

virtual

Returns: the system id for this simulator; used for MPI or other distributed simulations

Implements ns3::SimulatorImpl.

Definition at line 804 of file realtime-simulator-impl.cc.

TypeId ns3::RealtimeSimulatorImpl::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::RealtimeSimulatorImpl.

Attributes defined for this type:

SynchronizationMode: What to do if the simulation cannot keep up with real time.
- Set with class: ns3::EnumValue
- Underlying type: BestEffort|HardLimit
- Initial value: BestEffort
- Flags: construct write
HardLimit: Maximum acceptable real-time jitter (used in conjunction with SynchronizationMode=HardLimit)
- Set with class: TimeValue
- Underlying type: Time
- Initial value: +100000000.0ns
- Flags: construct write read

No TraceSources defined for this type.

Reimplemented from ns3::SimulatorImpl.

Definition at line 45 of file realtime-simulator-impl.cc.

References m_hardLimit, ns3::MakeEnumAccessor(), ns3::MakeEnumChecker(), ns3::Seconds(), ns3::TypeId::SetParent(), SetSynchronizationMode(), SYNC_BEST_EFFORT, and SYNC_HARD_LIMIT.

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bool ns3::RealtimeSimulatorImpl::IsExpired ( const EventId & ev ) const

virtual

This method has O(1) complexity. Note that it is not possible to test for the expiration of events which were scheduled for the "destroy" time. Doing so will result in a program error (crash). An event is said to "expire" when it starts being scheduled which means that if the code executed by the event calls this function, it will get true.

Parameters

ev	the event to test for expiration

Returns: true if the event has expired, false otherwise.

Implements ns3::SimulatorImpl.

Definition at line 752 of file realtime-simulator-impl.cc.

References ns3::EventId::GetTs(), ns3::EventId::GetUid(), ns3::EventImpl::IsCancelled(), m_currentTs, m_currentUid, m_destroyEvents, and ns3::EventId::PeekEventImpl().

Referenced by Cancel(), GetDelayLeft(), and Remove().

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bool ns3::RealtimeSimulatorImpl::IsFinished ( void ) const

virtual

If there are no more events lefts to be scheduled, or if simulation time has already reached the "stop time" (see Simulator::Stop()), return true. Return false otherwise.

Implements ns3::SimulatorImpl.

Definition at line 386 of file realtime-simulator-impl.cc.

References ns3::Scheduler::IsEmpty(), m_events, m_mutex, m_stop, and NS_LOG_FUNCTION_NOARGS.

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uint64_t ns3::RealtimeSimulatorImpl::NextTs ( void ) const

private

Definition at line 402 of file realtime-simulator-impl.cc.

References ns3::Scheduler::IsEmpty(), ns3::Scheduler::Event::key, m_events, ns3::Scheduler::EventKey::m_ts, NS_ASSERT_MSG, NS_LOG_FUNCTION_NOARGS, and ns3::Scheduler::PeekNext().

Referenced by ProcessOneEvent().

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Time ns3::RealtimeSimulatorImpl::Now ( void ) const

virtual

Return the "current simulation time".

Implements ns3::SimulatorImpl.

Definition at line 591 of file realtime-simulator-impl.cc.

References m_currentTs, and ns3::TimeStep().

Referenced by Schedule().

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void ns3::RealtimeSimulatorImpl::ProcessOneEvent ( void )

private

Definition at line 156 of file realtime-simulator-impl.cc.

References ns3::Synchronizer::EventEnd(), ns3::Synchronizer::EventStart(), ns3::Synchronizer::GetCurrentRealtime(), ns3::Time::GetTimeStep(), ns3::Scheduler::Event::impl, ns3::Scheduler::IsEmpty(), m_currentContext, m_currentTs, m_currentUid, m_events, m_hardLimit, m_mutex, m_synchronizationMode, m_synchronizer, m_unscheduledEvents, NextTs(), NS_ASSERT_MSG, NS_FATAL_ERROR, NS_LOG_FUNCTION_NOARGS, NS_LOG_LOGIC, ns3::Synchronizer::Realtime(), ns3::Scheduler::RemoveNext(), ns3::Synchronizer::SetCondition(), SYNC_HARD_LIMIT, and ns3::Synchronizer::Synchronize().

Referenced by Run().

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bool ns3::RealtimeSimulatorImpl::Realtime ( void ) const

private

Definition at line 481 of file realtime-simulator-impl.cc.

References m_synchronizer, NS_LOG_FUNCTION_NOARGS, and ns3::Synchronizer::Realtime().

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Time ns3::RealtimeSimulatorImpl::RealtimeNow ( void ) const

Definition at line 661 of file realtime-simulator-impl.cc.

References ns3::Synchronizer::GetCurrentRealtime(), m_synchronizer, and ns3::TimeStep().

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void ns3::RealtimeSimulatorImpl::Remove ( const EventId & ev )

virtual

Remove an event from the event list. This method has the same visible effect as the ns3::EventId::Cancel method but its algorithmic complexity is much higher: it has often O(log(n)) complexity, sometimes O(n), sometimes worse. Note that it is not possible to remove events which were scheduled for the "destroy" time. Doing so will result in a program error (crash).

Parameters

ev	the event to remove from the list of scheduled events.

Implements ns3::SimulatorImpl.

Definition at line 704 of file realtime-simulator-impl.cc.

References ns3::Scheduler::Event::impl, IsExpired(), m_destroyEvents, m_events, m_mutex, m_unscheduledEvents, and ns3::Scheduler::Remove().

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void ns3::RealtimeSimulatorImpl::Run ( void )

virtual

Run the simulation until one of:

no events are present anymore
the user called Simulator::stop
the user called Simulator::stopAtUs and the expiration time of the next event to be processed is greater than or equal to the stop time.

Implements ns3::SimulatorImpl.

Definition at line 412 of file realtime-simulator-impl.cc.

References ns3::Synchronizer::GetCurrentRealtime(), ns3::Scheduler::IsEmpty(), m_currentTs, m_events, m_main, m_mutex, m_running, m_stop, m_synchronizer, m_unscheduledEvents, NS_ASSERT_MSG, NS_LOG_FUNCTION_NOARGS, ProcessOneEvent(), ns3::SystemThread::Self(), ns3::Synchronizer::SetOrigin(), and ns3::Synchronizer::Synchronize().

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bool ns3::RealtimeSimulatorImpl::Running ( void ) const

private

Definition at line 474 of file realtime-simulator-impl.cc.

References m_running, and NS_LOG_FUNCTION_NOARGS.

EventId ns3::RealtimeSimulatorImpl::Schedule	(	Time const &	time,
		EventImpl *	event
	)

virtual

Parameters

time	delay until the event expires
event	the event to schedule

Returns: a unique identifier for the newly-scheduled event.

This method will be typically used by language bindings to delegate events to their own subclass of the EventImpl base class.

Implements ns3::SimulatorImpl.

Definition at line 504 of file realtime-simulator-impl.cc.

References GetContext(), ns3::Time::GetTimeStep(), ns3::Scheduler::Event::impl, ns3::Scheduler::Insert(), ns3::Time::IsPositive(), ns3::Scheduler::Event::key, ns3::Scheduler::EventKey::m_context, m_currentTs, m_events, m_mutex, m_synchronizer, ns3::Scheduler::EventKey::m_ts, ns3::Scheduler::EventKey::m_uid, m_uid, m_unscheduledEvents, Now(), NS_ASSERT_MSG, NS_LOG_FUNCTION, ns3::Synchronizer::Signal(), and ns3::TimeStep().

Referenced by Stop().

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EventId ns3::RealtimeSimulatorImpl::ScheduleDestroy ( EventImpl * event )

virtual

Parameters

event the event to schedule

Returns: a unique identifier for the newly-scheduled event.

This method will be typically used by language bindings to delegate events to their own subclass of the EventImpl base class.

Implements ns3::SimulatorImpl.

Definition at line 667 of file realtime-simulator-impl.cc.

References m_currentTs, m_destroyEvents, m_mutex, m_uid, and NS_LOG_FUNCTION_NOARGS.

EventId ns3::RealtimeSimulatorImpl::ScheduleNow ( EventImpl * event )

virtual

Parameters

event the event to schedule

Returns: a unique identifier for the newly-scheduled event.

This method will be typically used by language bindings to delegate events to their own subclass of the EventImpl base class.

Implements ns3::SimulatorImpl.

Definition at line 570 of file realtime-simulator-impl.cc.

References GetContext(), ns3::Scheduler::Event::impl, ns3::Scheduler::Insert(), ns3::Scheduler::Event::key, ns3::Scheduler::EventKey::m_context, m_currentTs, m_events, m_mutex, m_synchronizer, ns3::Scheduler::EventKey::m_ts, ns3::Scheduler::EventKey::m_uid, m_uid, m_unscheduledEvents, NS_LOG_FUNCTION_NOARGS, and ns3::Synchronizer::Signal().

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void ns3::RealtimeSimulatorImpl::ScheduleRealtime	(	Time const &	time,
		EventImpl *	event
	)

Definition at line 621 of file realtime-simulator-impl.cc.

References GetContext(), NS_LOG_FUNCTION, and ScheduleRealtimeWithContext().

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void ns3::RealtimeSimulatorImpl::ScheduleRealtimeNow ( EventImpl * event )

Definition at line 654 of file realtime-simulator-impl.cc.

References GetContext(), NS_LOG_FUNCTION, and ScheduleRealtimeNowWithContext().

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void ns3::RealtimeSimulatorImpl::ScheduleRealtimeNowWithContext	(	uint32_t	context,
		EventImpl *	event
	)

Definition at line 628 of file realtime-simulator-impl.cc.

References ns3::Synchronizer::GetCurrentRealtime(), ns3::Scheduler::Event::impl, ns3::Scheduler::Insert(), ns3::Scheduler::Event::key, ns3::Scheduler::EventKey::m_context, m_currentTs, m_events, m_mutex, m_running, m_synchronizer, ns3::Scheduler::EventKey::m_ts, ns3::Scheduler::EventKey::m_uid, m_uid, m_unscheduledEvents, NS_ASSERT_MSG, NS_LOG_FUNCTION, and ns3::Synchronizer::Signal().

Referenced by ScheduleRealtimeNow().

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void ns3::RealtimeSimulatorImpl::ScheduleRealtimeWithContext	(	uint32_t	context,
		Time const &	time,
		EventImpl *	event
	)

Definition at line 600 of file realtime-simulator-impl.cc.

References ns3::Synchronizer::GetCurrentRealtime(), ns3::Time::GetTimeStep(), ns3::Scheduler::Event::impl, ns3::Scheduler::Insert(), ns3::Scheduler::Event::key, m_currentTs, m_events, m_mutex, m_synchronizer, ns3::Scheduler::EventKey::m_ts, ns3::Scheduler::EventKey::m_uid, m_uid, m_unscheduledEvents, NS_ASSERT_MSG, NS_LOG_FUNCTION, and ns3::Synchronizer::Signal().

Referenced by ScheduleRealtime().

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void ns3::RealtimeSimulatorImpl::ScheduleWithContext	(	uint32_t	context,
		Time const &	time,
		EventImpl *	event
	)

virtual

Parameters

time	delay until the event expires
context	event context
event	the event to schedule

Returns: a unique identifier for the newly-scheduled event.

This method will be typically used by language bindings to delegate events to their own subclass of the EventImpl base class.

Implements ns3::SimulatorImpl.

Definition at line 534 of file realtime-simulator-impl.cc.

References ns3::SystemThread::Equals(), ns3::Synchronizer::GetCurrentRealtime(), ns3::Time::GetTimeStep(), ns3::Scheduler::Event::impl, ns3::Scheduler::Insert(), ns3::Scheduler::Event::key, ns3::Scheduler::EventKey::m_context, m_currentTs, m_events, m_main, m_mutex, m_running, m_synchronizer, ns3::Scheduler::EventKey::m_ts, ns3::Scheduler::EventKey::m_uid, m_uid, m_unscheduledEvents, NS_ASSERT_MSG, NS_LOG_FUNCTION, and ns3::Synchronizer::Signal().

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void ns3::RealtimeSimulatorImpl::SetHardLimit ( Time limit )

Definition at line 830 of file realtime-simulator-impl.cc.

References m_hardLimit, and NS_LOG_FUNCTION.

void ns3::RealtimeSimulatorImpl::SetScheduler ( ObjectFactory schedulerFactory )

virtual

Parameters

schedulerFactory a new event scheduler factory

The event scheduler can be set at any time: the events scheduled in the previous scheduler will be transfered to the new scheduler before we start to use it.

Implements ns3::SimulatorImpl.

Definition at line 134 of file realtime-simulator-impl.cc.

References ns3::ObjectFactory::Create(), ns3::Scheduler::Insert(), ns3::Scheduler::IsEmpty(), m_events, m_mutex, NS_LOG_FUNCTION_NOARGS, and ns3::Scheduler::RemoveNext().

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void ns3::RealtimeSimulatorImpl::SetSynchronizationMode ( RealtimeSimulatorImpl::SynchronizationMode mode )

Definition at line 816 of file realtime-simulator-impl.cc.

References m_synchronizationMode, and NS_LOG_FUNCTION.

Referenced by GetTypeId().

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void ns3::RealtimeSimulatorImpl::Stop ( void )

virtual

If an event invokes this method, it will be the last event scheduled by the Simulator::run method before returning to the caller.

Implements ns3::SimulatorImpl.

Definition at line 488 of file realtime-simulator-impl.cc.

References m_stop, and NS_LOG_FUNCTION_NOARGS.

void ns3::RealtimeSimulatorImpl::Stop ( Time const & time )

virtual

Force the Simulator::run method to return to the caller when the expiration time of the next event to be processed is greater than or equal to the stop time. The stop time is relative to the current simulation time.

Parameters