ns3::Time Class Reference

keep track of time values and allow control of global simulation resolution More...

#include <nstime.h>

Collaboration diagram for ns3::Time:

Classes
struct	Information
struct	Resolution

Public Types
enum	Unit {   S = 0, MS = 1, US = 2, NS = 3,   PS = 4, FS = 5, LAST = 6 }

Public Member Functions
	Time ()
	Time (const Time &o)
	Time (double v)
	Time (int v)
	Time (long int v)
	Time (long long int v)
	Time (unsigned int v)
	Time (unsigned long int v)
	Time (unsigned long long int v)
	Time (const std::string &s)
	Construct Time object from common time expressions like "1ms".
	Time (const int64x64_t &value)
	~Time ()
int	Compare (const Time &o) const
double	GetDouble (void) const
int64_t	GetFemtoSeconds (void) const
int64_t	GetInteger (void) const
int64_t	GetMicroSeconds (void) const
int64_t	GetMilliSeconds (void) const
int64_t	GetNanoSeconds (void) const
int64_t	GetPicoSeconds (void) const
double	GetSeconds (void) const
int64_t	GetTimeStep (void) const
bool	IsNegative (void) const
bool	IsPositive (void) const
bool	IsStrictlyNegative (void) const
bool	IsStrictlyPositive (void) const
bool	IsZero (void) const
	operator int64x64_t () const
Time &	operator= (const Time &o)
int64x64_t	To (enum Unit timeUnit) const
double	ToDouble (enum Unit timeUnit) const
int64_t	ToInteger (enum Unit timeUnit) const

Static Public Member Functions
static Time	From (const int64x64_t &from, enum Unit timeUnit)
static Time	From (const int64x64_t &value)
static Time	FromDouble (double value, enum Unit timeUnit)
static Time	FromInteger (uint64_t value, enum Unit timeUnit)
static enum Unit	GetResolution (void)
static Time	Max ()
	Maximum representable Time.
static Time	Min ()
	Minimum representable Time.
static void	SetResolution (enum Unit resolution)
static bool	StaticInit ()

Private Types
typedef std::set< Time * >	MarkedTimes

Static Private Member Functions
static void	Clear (Time *const time)
static void	ClearMarkedTimes ()
static void	ConvertTimes (const enum Unit unit)
static void	Mark (Time *const time)
static struct Information *	PeekInformation (enum Unit timeUnit)
static struct Resolution *	PeekResolution (void)
static struct Resolution	SetDefaultNsResolution (void)
static void	SetResolution (enum Unit unit, struct Resolution *resolution, const bool convert=true)

Private Attributes
int64_t	m_data
	Virtual time value, in the current unit.

Static Private Attributes
static MarkedTimes *	g_markingTimes = 0

Friends
Time	Abs (const Time &time)
Time	Max (const Time &ta, const Time &tb)
Time	Min (const Time &ta, const Time &tb)
bool	operator!= (const Time &lhs, const Time &rhs)
Time	operator+ (const Time &lhs, const Time &rhs)
Time &	operator+= (Time &lhs, const Time &rhs)
Time	operator- (const Time &lhs, const Time &rhs)
Time &	operator-= (Time &lhs, const Time &rhs)
bool	operator< (const Time &lhs, const Time &rhs)
bool	operator<= (const Time &lhs, const Time &rhs)
bool	operator== (const Time &lhs, const Time &rhs)
bool	operator> (const Time &lhs, const Time &rhs)
bool	operator>= (const Time &lhs, const Time &rhs)
class	Simulator

Related Functions
(Note that these are not member functions.)
Time	FemtoSeconds (uint64_t fs)
	create ns3::Time instances in units of femtoseconds.
Time	FemtoSeconds (int64x64_t fs)
SystemMutex &	GetMarkingMutex ()
Time	MicroSeconds (uint64_t us)
	create ns3::Time instances in units of microseconds.
Time	MicroSeconds (int64x64_t us)
Time	MilliSeconds (uint64_t ms)
	create ns3::Time instances in units of milliseconds.
Time	MilliSeconds (int64x64_t ms)
Time	NanoSeconds (uint64_t ns)
	create ns3::Time instances in units of nanoseconds.
Time	NanoSeconds (int64x64_t ns)
std::ostream &	operator<< (std::ostream &os, const Time &time)
	Time output streamer.
std::istream &	operator>> (std::istream &is, Time &time)
	Time input streamer.
Time	PicoSeconds (uint64_t ps)
	create ns3::Time instances in units of picoseconds.
Time	PicoSeconds (int64x64_t ps)
Time	Seconds (double seconds)
	create ns3::Time instances in units of seconds.
Time	Seconds (int64x64_t seconds)

Detailed Description

keep track of time values and allow control of global simulation resolution

This class defines all the classic C++ arithmetic operators +, -, *, /, and all the classic comparison operators: ==, !=, <, >, <=, >=. It is thus easy to add, substract, or multiply Time objects.

For example:

Time t1 = Seconds (10.0);
Time t2 = Seconds (10.0);
Time t3 = t1 * t2;
Time t4 = t1 / t2;
Time t5 = t3 * t1;
Time t6 = t1 / t5;
Time t7 = t3;

You can also use the following non-member functions to manipulate any of these ns3::Time object:

• ns3-Time-Abs ns3::Abs
• ns3-Time-Max ns3::Max
• ns3-Time-Min ns3::Min

This class also controls the resolution of the underlying time value . The default resolution is nanoseconds. That is, TimeStep (1).GetNanoSeconds () will return

1. It is possible to either increase or decrease the resolution and the code tries really hard to make this easy.

If your resolution is X (say, nanoseconds) and if you create Time objects with a lower resolution (say, picoseconds), don't expect that this code will return 1: PicoSeconds (1).GetPicoSeconds (). It will most likely return 0 because the Time object has only 64 bits of fractional precision which means that PicoSeconds (1) is stored as a 64-bit aproximation of 1/1000 in the Time object. If you later multiply it again by the exact value 1000, the result is unlikely to be 1 exactly. It will be close to 1 but not exactly 1.

In general, it is thus a really bad idea to try to use time objects of a resolution higher than the global resolution controlled through Time::SetResolution. If you do need to use picoseconds, it's thus best to switch the global resolution to picoseconds to avoid nasty surprises.

Another important issue to keep in mind is that if you increase the global resolution, you also implicitely decrease the range of your simulation. i.e., the global simulation time is stored in a 64 bit integer whose interpretation will depend on the global resolution so, 2^64 picoseconds which is the maximum duration of your simulation if the global resolution is picoseconds is smaller than 2^64 nanoseconds which is the maximum duration of your simulation if the global resolution is nanoseconds.

Finally, don't even think about ever changing the global resolution after creating Time objects: all Time objects created before the call to SetResolution will contain values which are not updated to the new resolution. In practice, the default value for the attributes of many models is indeed calculated before the main function of the main program enters. Because of this, if you use one of these models (and it's likely), it's going to be hard to change the global simulation resolution in a way which gives reasonable results. This issue has been filed as bug 954 in the ns-3 bugzilla installation.

Definition at line 103 of file nstime.h.

Member Typedef Documentation

typedef std::set< Time * > ns3::Time::MarkedTimes

private

Record all instances of Time, so we can rescale them when the resolution changes.

We use a std::set so we can remove the record easily when ~Time() is called.

We don't use Ptr<Time>, because we would have to bloat every Time instance with SimpleRefCount<Time>.

Seems like this should be std::set< Time * const >, but Stack Overflow says otherwise, quoting the standard:

§23.1/3 states that std::set key types must be assignable and copy constructable; clearly a const type will not be assignable.

Definition at line 529 of file nstime.h.

Member Enumeration Documentation

enum ns3::Time::Unit

The unit to use to interpret a number representing time

Enumerator:

S	second
MS	millisecond
US	microsecond
NS	nanosecond
PS	picosecond
FS	femtosecond
LAST

Definition at line 109 of file nstime.h.

Constructor & Destructor Documentation

ns3::Time::Time ( )

inline

Definition at line 125 of file nstime.h.

References g_markingTimes, and Mark().

Referenced by From(), FromInteger(), Max(), and Min().

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ns3::Time::Time ( const Time &  o )

inline

Definition at line 133 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( double  v )

inlineexplicit

Definition at line 141 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( int  v )

inlineexplicit

Definition at line 149 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( long int  v )

inlineexplicit

Definition at line 157 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( long long int  v )

inlineexplicit

Definition at line 165 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( unsigned int  v )

inlineexplicit

Definition at line 173 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( unsigned long int  v )

inlineexplicit

Definition at line 181 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( unsigned long long int  v )

inlineexplicit

Definition at line 189 of file nstime.h.

References g_markingTimes, and Mark().

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ns3::Time::Time ( const std::string &  s )

explicit

Construct Time object from common time expressions like "1ms".

Supported units include:

• s (seconds)
• ms (milliseconds)
• us (microseconds)
• ns (nanoseconds)
• ps (picoseconds)
• fs (femtoseconds)

There can be no white space between the numerical portion and the units. Any otherwise malformed string causes a fatal error to occur.

Parameters

s	The string to parse into a Time

Definition at line 91 of file time.cc.

References FromDouble(), FS, g_markingTimes, Mark(), MS, NS, NS_ABORT_MSG, NS_LOG_FUNCTION, PS, S, and US.

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ns3::Time::~Time ( )

inline

Destructor

Definition at line 233 of file nstime.h.

References Clear(), and g_markingTimes.

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ns3::Time::Time ( const int64x64_t &  value )

inlineexplicit

Definition at line 462 of file nstime.h.

References g_markingTimes, and Mark().

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Member Function Documentation

void ns3::Time::Clear ( Time *const  time )

staticprivate

Remove a Time instance from the MarkedTimes, called by ~Time()

Definition at line 272 of file time.cc.

References g_markingTimes, GetMarkingMutex(), NS_ASSERT, NS_ASSERT_MSG, NS_LOG_FUNCTION, NS_LOG_LOGIC, and NS_LOG_WARN.

Referenced by ~Time().

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void ns3::Time::ClearMarkedTimes ( )

staticprivate

Remove all MarkedTimes.

Has to be visible to the Simulator class, hence the friending.

Internal:

We're called by Simulator::Run, which knows nothing about the mutex, so we need a critical section here.

It would seem natural to use this function at the end of ConvertTimes, but that function already has the mutex. Our SystemMutex throws a fatal error if we try to lock it more than once in the same thread (at least in the unix implementation), so calling this function from ConvertTimes is a bad idea.

Instead, we copy this body into ConvertTimes.

Definition at line 215 of file time.cc.

References g_markingTimes, GetMarkingMutex(), NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by ns3::Simulator::Run().

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int ns3::Time::Compare ( const Time &  o ) const

inline

Returns

-1,0,+1 if this < o, this == o, or this > o

Definition at line 279 of file nstime.h.

References m_data.

void ns3::Time::ConvertTimes ( const enum Unit  unit )

staticprivate

Convert existing Times to the new unit.

Definition at line 302 of file time.cc.

References g_markingTimes, GetMarkingMutex(), m_data, NS_ASSERT_MSG, NS_LOG_FUNCTION_NOARGS, NS_LOG_LOGIC, and ToInteger().

Referenced by SetResolution().

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static Time ns3::Time::From ( const int64x64_t &  from, enum Unit  timeUnit  )

inlinestatic

Definition at line 428 of file nstime.h.

References ns3::Time::Information::fromMul, PeekInformation(), Time(), and ns3::Time::Information::timeFrom.

Referenced by FemtoSeconds(), FromDouble(), MicroSeconds(), MilliSeconds(), NanoSeconds(), PicoSeconds(), and Seconds().

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static Time ns3::Time::From ( const int64x64_t &  value )

inlinestatic

Definition at line 470 of file nstime.h.

References Time().

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static Time ns3::Time::FromDouble ( double  value, enum Unit  timeUnit  )

inlinestatic

Parameters

value	to convert into a Time object
timeUnit	the unit of the value to convert

Returns

a new Time object

See Also

FromInteger, ToInteger, ToDouble

Definition at line 413 of file nstime.h.

References From().

Referenced by ns3::RttMeanDeviation::Measurement(), Seconds(), and Time().

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static Time ns3::Time::FromInteger ( uint64_t  value, enum Unit  timeUnit  )

inlinestatic

Parameters

value	to convert into a Time object
timeUnit	the unit of the value to convert

Returns

a new Time object

This method interprets the input value according to the input unit and constructs a matching Time object.

See Also

FromDouble, ToDouble, ToInteger

Definition at line 372 of file nstime.h.

References ns3::Time::Information::factor, ns3::Time::Information::fromMul, PeekInformation(), and Time().

Referenced by FemtoSeconds(), MicroSeconds(), MilliSeconds(), NanoSeconds(), PicoSeconds(), and ns3::RttMeanDeviation::RetransmitTimeout().

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double ns3::Time::GetDouble ( void  ) const

inline

Definition at line 340 of file nstime.h.

References m_data.

int64_t ns3::Time::GetFemtoSeconds ( void  ) const

inline

Returns

an approximation in femtoseconds of the time stored in this instance.

Definition at line 329 of file nstime.h.

References FS, and ToInteger().

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int64_t ns3::Time::GetInteger ( void  ) const

inline

Definition at line 344 of file nstime.h.

References GetTimeStep().

Referenced by ns3::DistributedSimulatorImpl::CalculateLookAhead(), and TimeSimpleTestCase::DoRun().

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int64_t ns3::Time::GetMicroSeconds ( void  ) const

inline

Returns

an approximation in microseconds of the time stored in this instance.

Definition at line 305 of file nstime.h.

References ToInteger(), and US.

Referenced by ns3::dot11s::IeBeaconTiming::BeaconIntervalToU16(), ns3::WifiRemoteStationInfo::CalculateAveragingCoefficient(), ns3::TxDurationTest::CheckTxDuration(), ns3::dot11s::HwmpProtocol::GetActivePathLifetime(), ns3::NscTcpL4Protocol::gettime(), Ns3TcpStateTestCase::Ipv4L3Tx(), Ns3TcpLossTestCase::Ipv4L3Tx(), Ns3TcpInteroperabilityTestCase::Ipv4L3Tx(), ns3::MeshWifiInterfaceMac::Receive(), ns3::dot11s::HwmpProtocol::ReceivePreq(), ns3::MeshWifiInterfaceMac::SendBeacon(), ns3::ApWifiMac::SendOneBeacon(), ns3::dot11s::HwmpProtocol::SendProactivePreq(), ns3::ApWifiMac::SendProbeResp(), ns3::dot11s::PeerLink::SetBeaconInformation(), ns3::ApWifiMac::SetBeaconInterval(), ns3::dot11s::PeerLink::SetConfirmTimer(), ns3::WifiMacHeader::SetDuration(), ns3::dot11s::PeerLink::SetHoldingTimer(), ns3::dot11s::PeerLink::SetRetryTimer(), ns3::DcfManager::SetSlot(), ns3::dot11s::IeBeaconTiming::TimestampToU16(), ns3::dot11s::PeerManagementProtocol::TimeToTu(), ns3::MinstrelWifiManager::UpdateStats(), and ns3::PcapFileWrapper::Write().

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int64_t ns3::Time::GetMilliSeconds ( void  ) const

inline

Returns

an approximation in milliseconds of the time stored in this instance.

Definition at line 297 of file nstime.h.

References MS, and ToInteger().

Referenced by ns3::TraceFadingLossModel::DoCalcRxPowerSpectralDensity(), ns3::LteRlcTm::DoReportBufferStatus(), ns3::LteRlcUm::DoReportBufferStatus(), ns3::LteRlcAm::DoReportBufferStatus(), RttTestCase::DoRun(), ns3::LenaDataPhyErrorModelTestCase::DoRun(), ns3::LenaDlCtrlPhyErrorModelTestCase::DoRun(), ns3::LteSpectrumPhy::EndRxData(), ns3::TraceFadingLossModel::LoadTrace(), JakesPropagationExample::Next(), ns3::V4Ping::Receive(), ns3::LteUePhy::ReceiveLteControlMessageList(), ns3::aodv::RrepHeader::RrepHeader(), ns3::aodv::RrepHeader::SetHello(), ns3::aodv::RrepHeader::SetLifeTime(), ns3::UplinkSchedulerSimple::SetupServiceFlow(), ns3::UplinkSchedulerMBQoS::SetupServiceFlow(), ns3::UplinkSchedulerRtps::SetupServiceFlow(), and ns3::LteEnbPhy::StartSubFrame().

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int64_t ns3::Time::GetNanoSeconds ( void  ) const

inline

Returns

an approximation in nanoseconds of the time stored in this instance.

Definition at line 313 of file nstime.h.

References NS, and ToInteger().

Referenced by ns3::AcousticModemEnergyModel::ChangeState(), ns3::WifiRadioEnergyModel::ChangeState(), ns3::MacStatsCalculator::DlScheduling(), ns3::LteRlcUm::DoReceivePdu(), ns3::LteRlcTm::DoReceivePdu(), ns3::LteRlcAm::DoReceivePdu(), ns3::LtePdcp::DoReceivePdu(), ns3::LteRlcSm::DoReceivePdu(), TimeSimpleTestCase::DoRun(), SimulatorEventsTestCase::NowUs(), ns3::PhyStatsCalculator::ReportCurrentCellRsrpSinr(), ns3::PhyStatsCalculator::ReportInterference(), ns3::PhyStatsCalculator::ReportUeSinr(), ns3::MpiInterface::SendPacket(), ns3::RlcTag::Serialize(), ns3::PdcpTag::Serialize(), TimestampTag::Serialize(), ns3::Synchronizer::TimeStepToNanosecond(), ns3::MacStatsCalculator::UlScheduling(), ns3::RadioBearerStatsCalculator::WriteDlResults(), and ns3::RadioBearerStatsCalculator::WriteUlResults().

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int64_t ns3::Time::GetPicoSeconds ( void  ) const

inline

Returns

an approximation in picoseconds of the time stored in this instance.

Definition at line 321 of file nstime.h.

References PS, and ToInteger().

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enum Time::Unit ns3::Time::GetResolution ( void  )

static

Returns

the current global resolution.

Definition at line 339 of file time.cc.

References PeekResolution(), and ns3::Time::Resolution::unit.

Referenced by ns3::operator<<().

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double ns3::Time::GetSeconds ( void  ) const

inline

Returns

an approximation in seconds of the time stored in this instance.

Definition at line 288 of file nstime.h.

References S, and ToDouble().

Referenced by ns3::dsr::RouteCache::AddRoute_Link(), ns3::AsciiPhyReceiveSinkWithContext(), ns3::AsciiPhyReceiveSinkWithoutContext(), ns3::AsciiPhyRxOkEvent(), ns3::AsciiPhyTransmitSinkWithContext(), ns3::AsciiPhyTransmitSinkWithoutContext(), ns3::AsciiPhyTxEvent(), ns3::WimaxHelper::AsciiRxEvent(), ns3::WimaxHelper::AsciiTxEvent(), ns3::UanPhyCalcSinrFhFsk::CalcSinrDb(), ns3::InterferenceHelper::CalculateChunkSuccessRate(), ns3::SimpleOfdmWimaxPhy::CalculateDataRate(), ns3::DistributedSimulatorImpl::CalculateLookAhead(), ns3::BasicEnergySource::CalculateRemainingEnergy(), ns3::LiIonEnergySource::CalculateRemainingEnergy(), ns3::AcousticModemEnergyModel::ChangeState(), ns3::WifiRadioEnergyModel::ChangeState(), ns3::UplinkSchedulerMBQoS::CheckDeadline(), CheckQueueSize(), ns3::LteX2HandoverMeasuresTestCase::CheckStats(), ns3::LteX2HandoverTestCase::CheckStatsAWhileAfterHandover(), ns3::UanMacRcGw::ComputeAlpha(), ns3::UanMacRcGw::ComputeExpS(), BatteryLifetimeTest::ConstantLoadTest(), ns3::Ns2MobilityHelperTest::CourseChange(), ns3::WaypointMobilityModelNotifyTest::CourseChangeCallback(), ns3::AnimationInterface::CsmaPhyTxEndTrace(), CwndChange(), CwndTracer(), Ns3TcpLossTestCase::CwndTracer(), ns3::AsciiTraceHelper::DefaultDequeueSinkWithContext(), ns3::AsciiTraceHelper::DefaultDequeueSinkWithoutContext(), ns3::AsciiTraceHelper::DefaultDropSinkWithContext(), ns3::AsciiTraceHelper::DefaultDropSinkWithoutContext(), ns3::AsciiTraceHelper::DefaultEnqueueSinkWithContext(), ns3::AsciiTraceHelper::DefaultEnqueueSinkWithoutContext(), ns3::AsciiTraceHelper::DefaultReceiveSinkWithContext(), ns3::AsciiTraceHelper::DefaultReceiveSinkWithoutContext(), ns3::AnimationInterface::DevTxTrace(), ns3::TraceFadingLossModel::DoCalcRxPowerSpectralDensity(), ns3::SimpleOfdmWimaxPhy::DoGetFrameDurationCode(), ns3::SimpleOfdmWimaxPhy::DoGetNrBytes(), ns3::SimpleOfdmWimaxPhy::DoGetNrSymbols(), ns3::dot11s::HwmpProtocol::DoInitialize(), ns3::MeshWifiInterfaceMac::DoInitialize(), ns3::LteHandoverDelayTestCase::DoRun(), TimesWithSignsTestCase::DoRun(), ns3::SimpleOfdmWimaxPhy::DoSetPhyParameters(), ns3::RandomWalk2dMobilityModel::DoWalk(), ns3::GaussMarkovMobilityModel::DoWalk(), ns3::TcpWestwood::DupAck(), ns3::LteHandoverDelayTestCase::EnbHandoverEndOkCallback(), ns3::LteTestSinrChunkProcessor::End(), ns3::LteCtrlSinrChunkProcessor::End(), ns3::LteDataSinrChunkProcessor::End(), ns3::LteRsReceivedPowerChunkProcessor::End(), ns3::LteInterferencePowerChunkProcessor::End(), ns3::BaseStationNetDevice::EndDlSubFrame(), ns3::BaseStationNetDevice::EndUlSubFrame(), ns3::UanMacCw::Enqueue(), ns3::TcpWestwood::EstimateBW(), ns3::ShannonSpectrumErrorModel::EvaluateChunk(), ns3::LteTestSinrChunkProcessor::EvaluateSinrChunk(), ns3::LteCtrlSinrChunkProcessor::EvaluateSinrChunk(), ns3::LteDataSinrChunkProcessor::EvaluateSinrChunk(), ns3::LteRsReceivedPowerChunkProcessor::EvaluateSinrChunk(), ns3::LteInterferencePowerChunkProcessor::EvaluateSinrChunk(), ExampleFunction(), ns3::dsr::RouteCache::FindSameRoute(), ns3::SpectrumAnalyzer::GenerateReport(), GenerateTraffic(), ns3::UanMacRcGw::GetExpPdk(), ns3::dsdv::RoutingProtocol::GetSettlingTime(), ns3::JakesProcess::Oscillator::GetValueAt(), ns3::AnimationInterface::GetXMLOpenClose_linkupdate(), ns3::AnimationInterface::GetXMLOpenClose_nodeupdate(), ns3::AnimationInterface::GetXMLOpenClose_routing(), ns3::AnimationInterface::GetXMLOpenClose_rp(), MyModel::HandleEvent(), DynamicGlobalRoutingTestCase::HandleRead(), ns3::dsr::RouteCache::IncStability(), ns3::RedQueue::InitializeParams(), ns3::SubscriberStationNetDevice::InitSubscriberStationNetDevice(), ns3::aodv::RoutingTableEntry::Invalidate(), ns3::Ipv4L3ProtocolDropSinkWithContext(), ns3::Ipv4L3ProtocolDropSinkWithoutContext(), ns3::Ipv4L3ProtocolRxSinkWithContext(), ns3::Ipv4L3ProtocolRxSinkWithoutContext(), ns3::Ipv4L3ProtocolTxSinkWithContext(), ns3::Ipv4L3ProtocolTxSinkWithoutContext(), ns3::Ipv6L3ProtocolDropSinkWithContext(), ns3::Ipv6L3ProtocolDropSinkWithoutContext(), ns3::Ipv6L3ProtocolRxSinkWithContext(), ns3::Ipv6L3ProtocolRxSinkWithoutContext(), ns3::Ipv6L3ProtocolTxSinkWithContext(), ns3::Ipv6L3ProtocolTxSinkWithoutContext(), ns3::ArpCache::Entry::IsExpired(), ns3::olsr::RoutingProtocol::LinkSensing(), main(), ns3::aodv::RoutingTable::MarkLinkAsUnidirectional(), ns3::BaseStationNetDevice::MarkUplinkAllocations(), modify(), ns3::UanMacCw::NotifyTxStart(), ns3::operator*(), ns3::operator<<(), ns3::SSLinkManager::PerformBackoff(), ns3::SeqTsHeader::Print(), ns3::UanHeaderRcData::Print(), ns3::UanHeaderRcRts::Print(), ns3::dsdv::RoutingTableEntry::Print(), ns3::UanHeaderRcCtsGlobal::Print(), ns3::UanHeaderRcCts::Print(), PrintCellInfo(), IpAddressHelper::PrintIpAddresses(), PrintReceivedPacket(), ns3::dsdv::RoutingProtocol::PrintRoutingTable(), ns3::aodv::RoutingProtocol::PrintRoutingTable(), ns3::Ipv4ListRouting::PrintRoutingTable(), ns3::Ipv6ListRouting::PrintRoutingTable(), ns3::Ipv6StaticRouting::PrintRoutingTable(), ns3::UplinkSchedulerMBQoS::ProcessBandwidthRequest(), ns3::BSLinkManager::ProcessRangingRequest(), ns3::AnimPacketInfo::ProcessRxEnd(), ns3::SubscriberStationNetDevice::ProcessUlMap(), ns3::AnimationInterface::PurgePendingCsma(), ns3::AnimationInterface::PurgePendingLte(), ns3::AnimationInterface::PurgePendingWifi(), ns3::AnimationInterface::PurgePendingWimax(), RandomFunction(), ns3::UanMacRc::ReceiveOkFromPhy(), ns3::dsdv::RoutingProtocol::RecvDsdv(), ns3::dot11s::HwmpProtocol::Report(), ns3::flame::FlameProtocol::Report(), ns3::dot11s::PeerLink::Report(), ns3::MeshWifiInterfaceMac::Report(), ns3::MeshHelper::Report(), ns3::FlowMonitor::ReportLastRx(), SampleEmitter::Reschedule(), NetAnimExperiment::ResetData(), Experiment::ResetData(), ns3::TcpWestwood::Retransmit(), ns3::RttMeanDeviation::RetransmitTimeout(), ns3::RttEstimator::RttEstimator(), ns3::RvBatteryModel::RvModelAFunction(), ns3::UanMacRc::ScheduleData(), ns3::dsr::DsrRouting::ScheduleNetworkPacketRetry(), ns3::dsr::DsrRouting::ScheduleRreqRetry(), ns3::aodv::RoutingProtocol::SendRerrMessage(), ns3::aodv::RoutingProtocol::SendRerrWhenNoRouteToForward(), ns3::UanHeaderRcData::Serialize(), ns3::UanHeaderRcRts::Serialize(), ns3::UanHeaderRcCtsGlobal::Serialize(), ns3::UanHeaderRcCts::Serialize(), ns3::dot11s::PeerLink::SetBeaconInformation(), ns3::SimpleDeviceEnergyModel::SetCurrentA(), ns3::olsr::MessageHeader::Hello::SetHTime(), ns3::UanPdp::SetTap(), ns3::olsr::MessageHeader::SetVTime(), showPosition(), DynamicGlobalRoutingTestCase::SinkRx(), SocketPrinter(), SsThreshTracer(), ns3::dsr::DsrRouting::Start(), ns3::UanMacRcGw::StartCycle(), ns3::BaseStationNetDevice::StartDlSubFrame(), Ns3TcpStateTestCase::StartFlow(), Ns3TcpLossTestCase::StartFlow(), ns3::BaseStationNetDevice::StartFrame(), ns3::UanMacCw::StartTimer(), ns3::BaseStationNetDevice::StartUlSubFrame(), ns3::UanPdp::SumTapsC(), ns3::UanPdp::SumTapsFromMaxC(), ns3::UanPdp::SumTapsFromMaxNc(), ns3::UanPdp::SumTapsNc(), TestDeterministicByTime(), ns3::TimePrinter(), ns3::CsmaNetDevice::TransmitCompleteEvent(), ns3::CsmaChannel::TransmitEnd(), ns3::PointToPointNetDevice::TransmitStart(), ns3::CsmaNetDevice::TransmitStart(), ns3::LteHandoverDelayTestCase::UeHandoverEndOkCallback(), ns3::ConstantVelocityHelper::Update(), BatteryLifetimeTest::VariableLoadTest(), ns3::WriteAveragePowerSpectralDensityReport(), ns3::AnimationInterface::WriteDummyPacket(), Ns3TcpStateTestCase::WriteUntilBufferFull(), and Ns3TcpLossTestCase::WriteUntilBufferFull().

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int64_t ns3::Time::GetTimeStep ( void  ) const

inline

Returns

the raw time value, in the current units

Definition at line 336 of file nstime.h.

References m_data.

Referenced by GetInteger(), ns3::Radvd::HandleRead(), ns3::DistributedSimulatorImpl::NextTs(), ns3::OmnetDataOutput::OmnetOutputCallback::OutputSingleton(), ns3::SqliteDataOutput::SqliteOutputCallback::OutputSingleton(), ns3::RealtimeSimulatorImpl::ProcessOneEvent(), ns3::DefaultSimulatorImpl::Schedule(), ns3::RealtimeSimulatorImpl::Schedule(), ns3::DistributedSimulatorImpl::Schedule(), ns3::RealtimeSimulatorImpl::ScheduleRealtimeWithContext(), ns3::DefaultSimulatorImpl::ScheduleWithContext(), ns3::RealtimeSimulatorImpl::ScheduleWithContext(), ns3::DistributedSimulatorImpl::ScheduleWithContext(), and ns3::DefaultSimulatorImpl::Stop().

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bool ns3::Time::IsNegative ( void  ) const

inline

Returns

true if the time is negative or zero, false otherwise.

Definition at line 251 of file nstime.h.

References m_data.

bool ns3::Time::IsPositive ( void  ) const

inline

Returns

true if the time is positive or zero, false otherwise.

Definition at line 258 of file nstime.h.

References m_data.

Referenced by ns3::DefaultSimulatorImpl::Schedule(), ns3::RealtimeSimulatorImpl::Schedule(), and ns3::DistributedSimulatorImpl::Schedule().

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bool ns3::Time::IsStrictlyNegative ( void  ) const

inline

Returns

true if the time is strictly negative, false otherwise.

Definition at line 265 of file nstime.h.

References m_data.

bool ns3::Time::IsStrictlyPositive ( void  ) const

inline

Returns

true if the time is strictly positive, false otherwise.

Definition at line 272 of file nstime.h.

References m_data.

bool ns3::Time::IsZero ( void  ) const

inline

Returns

true if the time is zero, false otherwise.

Definition at line 244 of file nstime.h.

References m_data.

Referenced by main(), and ns3::YansWifiPhy::StartReceivePacket().

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void ns3::Time::Mark ( Time *const  time )

staticprivate

Record a Time instance with the MarkedTimes

Definition at line 246 of file time.cc.

References g_markingTimes, GetMarkingMutex(), NS_ASSERT, NS_LOG_FUNCTION, NS_LOG_LOGIC, and NS_LOG_WARN.

Referenced by Time().

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static Time ns3::Time::Max ( )

inlinestatic

Maximum representable Time.

Definition at line 225 of file nstime.h.

References Time().

Referenced by ns3::MakeTimeChecker().

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static Time ns3::Time::Min ( )

inlinestatic

Minimum representable Time.

Definition at line 218 of file nstime.h.

References Time().

Referenced by ns3::MakeTimeChecker().

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ns3::Time::operator int64x64_t ( ) const

inline

Definition at line 458 of file nstime.h.

References m_data.

Time& ns3::Time::operator= ( const Time &  o )

inline

Definition at line 120 of file nstime.h.

References m_data.

static struct Information* ns3::Time::PeekInformation ( enum Unit  timeUnit )

inlinestaticreadprivate

Definition at line 501 of file nstime.h.

References ns3::Time::Resolution::info, and PeekResolution().

Referenced by From(), FromInteger(), To(), and ToInteger().

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static struct Resolution* ns3::Time::PeekResolution ( void  )

inlinestaticreadprivate

Definition at line 496 of file nstime.h.

References SetDefaultNsResolution().

Referenced by GetResolution(), PeekInformation(), and SetResolution().

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struct Time::Resolution ns3::Time::SetDefaultNsResolution ( void  )

staticreadprivate

Definition at line 149 of file time.cc.

References NS, NS_LOG_FUNCTION_NOARGS, and SetResolution().

Referenced by PeekResolution().

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void ns3::Time::SetResolution ( enum Unit  resolution )

static

Parameters

resolution

the new resolution to use

Change the global resolution used to convert all user-provided time values in Time objects and Time objects in user-expected time units.

Definition at line 159 of file time.cc.

References NS_LOG_FUNCTION, and PeekResolution().

Referenced by main(), and SetDefaultNsResolution().

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void ns3::Time::SetResolution ( enum Unit  unit, struct Resolution *  resolution, const bool  convert = true  )

staticprivate

Definition at line 168 of file time.cc.

References ConvertTimes(), ns3::Time::Information::factor, ns3::Time::Information::fromMul, ns3::Time::Resolution::info, LAST, NS_ASSERT, NS_LOG_FUNCTION, ns3::Time::Information::timeFrom, ns3::Time::Information::timeTo, ns3::Time::Information::toMul, and ns3::Time::Resolution::unit.

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bool ns3::Time::StaticInit ( )

static

Function to force static initialization of Time

Definition at line 58 of file time.cc.

References g_markingTimes, GetMarkingMutex(), and NS_LOG_ERROR.

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int64x64_t ns3::Time::To ( enum Unit  timeUnit ) const

inline

Definition at line 444 of file nstime.h.

References m_data, PeekInformation(), ns3::Time::Information::timeTo, and ns3::Time::Information::toMul.

Referenced by ns3::OnOffApplication::CancelEvents(), and ToDouble().

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double ns3::Time::ToDouble ( enum Unit  timeUnit ) const

inline

Parameters

timeUnit

the unit of the value to return

Returns

double time value

Convert the input time into a floating point value according to the requested time unit.

Definition at line 424 of file nstime.h.

References To().

Referenced by GetSeconds(), and ns3::RttMeanDeviation::Measurement().

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int64_t ns3::Time::ToInteger ( enum Unit  timeUnit ) const

inline

Parameters

timeUnit

the unit of the value to return

Returns

int64_t time value

Convert the input time into an integer value according to the requested time unit.

Definition at line 392 of file nstime.h.

References ns3::Time::Information::factor, m_data, PeekInformation(), and ns3::Time::Information::toMul.

Referenced by ConvertTimes(), GetFemtoSeconds(), GetMicroSeconds(), GetMilliSeconds(), GetNanoSeconds(), GetPicoSeconds(), ns3::operator<<(), and ns3::RttMeanDeviation::RetransmitTimeout().

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Friends And Related Function Documentation

Time Abs ( const Time &  time )

friend

Time FemtoSeconds ( uint64_t  fs )

related

create ns3::Time instances in units of femtoseconds.

For example:

Time t = FemtoSeconds (2);
Simulator::Schedule (FemtoSeconds (5), ...);

Parameters

fs	femtoseconds value

Definition at line 783 of file nstime.h.

References FromInteger(), and FS.

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Time FemtoSeconds ( int64x64_t  fs )

related

See Also

FemtoSeconds(uint64_t)

Definition at line 833 of file nstime.h.

References From(), and FS.

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SystemMutex & GetMarkingMutex ( )

related

Get mutex for critical sections around modification of Time::g_markingTimes

Definition at line 49 of file time.cc.

Referenced by Clear(), ClearMarkedTimes(), ConvertTimes(), Mark(), and StaticInit().

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Time Max ( const Time &  ta, const Time &  tb  )

friend

Time MicroSeconds ( uint64_t  us )

related

create ns3::Time instances in units of microseconds.

For example:

Time t = MicroSeconds (2);
Simulator::Schedule (MicroSeconds (5), ...);

Parameters

us	microseconds value

Definition at line 738 of file nstime.h.

References FromInteger(), and US.

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Time MicroSeconds ( int64x64_t  us )

related

See Also

MicroSeconds(uint64_t)

Definition at line 809 of file nstime.h.

References From(), and US.

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Time MilliSeconds ( uint64_t  ms )

related

create ns3::Time instances in units of milliseconds.

For example:

Time t = MilliSeconds (2);
Simulator::Schedule (MilliSeconds (5), ...);

Parameters

ms	milliseconds value

Definition at line 723 of file nstime.h.

References FromInteger(), and MS.

Referenced by main().

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Time MilliSeconds ( int64x64_t  ms )

related

See Also

MilliSeconds(uint64_t)

Definition at line 801 of file nstime.h.

References From(), and MS.

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Time Min ( const Time &  ta, const Time &  tb  )

friend

Parameters

ta	the first value
tb	the seconds value

Returns

the min of the two input values.

Definition at line 675 of file nstime.h.

Time NanoSeconds ( uint64_t  ns )

related

create ns3::Time instances in units of nanoseconds.

For example:

Time t = NanoSeconds (2);
Simulator::Schedule (NanoSeconds (5), ...);

Parameters

ns	nanoseconds value

Definition at line 753 of file nstime.h.

References FromInteger(), and NS.

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Time NanoSeconds ( int64x64_t  ns )

related

See Also

NanoSeconds(uint64_t)

Definition at line 817 of file nstime.h.

References From(), and NS.

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bool operator!= ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 605 of file nstime.h.

Time operator+ ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 629 of file nstime.h.

Time& operator+= ( Time &  lhs, const Time &  rhs  )

friend

Definition at line 637 of file nstime.h.

Time operator- ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 633 of file nstime.h.

Time& operator-= ( Time &  lhs, const Time &  rhs  )

friend

Definition at line 642 of file nstime.h.

bool operator< ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 620 of file nstime.h.

std::ostream & operator<< ( std::ostream &  os, const Time &  time  )

related

Time output streamer.

Generates output such as "3.96ns"

Definition at line 347 of file time.cc.

bool operator<= ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 610 of file nstime.h.

bool operator== ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 600 of file nstime.h.

bool operator> ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 625 of file nstime.h.

bool operator>= ( const Time &  lhs, const Time &  rhs  )

friend

Definition at line 615 of file nstime.h.

std::istream & operator>> ( std::istream &  is, Time &  time  )

related

Time input streamer.

Uses the Time::Time (const std::string &) constructor

Definition at line 393 of file time.cc.

Time PicoSeconds ( uint64_t  ps )

related

create ns3::Time instances in units of picoseconds.

For example:

Time t = PicoSeconds (2);
Simulator::Schedule (PicoSeconds (5), ...);

Parameters

ps	picoseconds value

Definition at line 768 of file nstime.h.

References FromInteger(), and PS.

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Time PicoSeconds ( int64x64_t  ps )

related

See Also

PicoSeconds(uint64_t)

Definition at line 825 of file nstime.h.

References From(), and PS.

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Time Seconds ( double  seconds )

related

create ns3::Time instances in units of seconds.

For example:

Time t = Seconds (2.0);
Simulator::Schedule (Seconds (5.0), ...);

Parameters

seconds

seconds value

Definition at line 707 of file nstime.h.

References FromDouble(), and S.

Referenced by AttributeTestCase< T >::DoRun(), and main().

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Time Seconds ( int64x64_t  seconds )

related

See Also

Seconds(double)

Definition at line 793 of file nstime.h.

References From(), and S.

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friend class Simulator

friend

Definition at line 555 of file nstime.h.

Member Data Documentation

Time::MarkedTimes * ns3::Time::g_markingTimes = 0

staticprivate

Record of outstanding Time objects which will need conversion when the resolution is set.

Use a classic static variable so we can check in Time ctors without a function call.

We'd really like to initialize this here, but we don't want to require C++0x, so we init in time.cc. To ensure that happens before first use, we add a call to StaticInit (below) to every compilation unit which includes nstime.h.

Definition at line 544 of file nstime.h.

Referenced by Clear(), ClearMarkedTimes(), ConvertTimes(), Mark(), StaticInit(), Time(), and ~Time().

int64_t ns3::Time::m_data

private

Virtual time value, in the current unit.

Definition at line 591 of file nstime.h.

Referenced by Compare(), ConvertTimes(), GetDouble(), GetTimeStep(), IsNegative(), IsPositive(), IsStrictlyNegative(), IsStrictlyPositive(), IsZero(), ns3::Min(), operator int64x64_t(), ns3::operator!=(), ns3::operator+(), ns3::operator+=(), ns3::operator-(), ns3::operator-=(), ns3::operator<(), ns3::operator<=(), operator=(), ns3::operator==(), ns3::operator>(), ns3::operator>=(), To(), and ToInteger().

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The documentation for this class was generated from the following files:

• src/core/model/nstime.h
• src/core/model/time.cc