#include <rng-seed-manager.h>

Collaboration diagram for ns3::RngSeedManager:

Static Public Member Functions
static uint64_t	GetNextStreamIndex (void)

static uint64_t	GetRun (void)

static uint32_t	GetSeed (void)
	Get the seed value. More...

static void	SetRun (uint64_t run)
	Set the run number of simulation. More...

static void	SetSeed (uint32_t seed)
	set the seed it will duplicate the seed value 6 times More...

Related Functions
(Note that these are not member functions.)
static uint64_t	g_nextStreamIndex = 0

static ns3::GlobalValue	g_rngRun ("RngRun","The run number used to modify the global seed", ns3::IntegerValue(1), ns3::MakeIntegerChecker< int64_t >())

static ns3::GlobalValue	g_rngSeed ("RngSeed","The global seed of all rng streams", ns3::IntegerValue(1), ns3::MakeIntegerChecker< uint32_t >())

Detailed Description

Definition at line 27 of file rng-seed-manager.h.

Member Function Documentation

uint64_t ns3::RngSeedManager::GetNextStreamIndex ( void )

static

Definition at line 94 of file rng-seed-manager.cc.

References g_nextStreamIndex, and NS_LOG_FUNCTION_NOARGS.

Referenced by ns3::RandomVariableStream::SetStream().

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uint64_t ns3::RngSeedManager::GetRun ( void )

static

Returns: the current run number

See also: SetRun

Definition at line 85 of file rng-seed-manager.cc.

References g_rngRun, ns3::IntegerValue::Get(), ns3::GlobalValue::GetValue(), and NS_LOG_FUNCTION_NOARGS.

Referenced by ns3::RandomVariableStream::SetStream().

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uint32_t ns3::RngSeedManager::GetSeed ( void )

static

Get the seed value.

Returns: the seed value

Note: returns the first of the six seed values used in the underlying RNG

Definition at line 65 of file rng-seed-manager.cc.

References g_rngSeed, ns3::IntegerValue::Get(), ns3::GlobalValue::GetValue(), and NS_LOG_FUNCTION_NOARGS.

Referenced by ns3::RandomVariableStream::SetStream().

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void ns3::RngSeedManager::SetRun ( uint64_t run )

static

Set the run number of simulation.

RngSeedManager::SetSeed(12);
int N = atol(argv[1]); //read in run number from command line
RngSeedManager::SetRun(N);
UniformVariable x(0,10);
ExponentialVariable y(2902);

In this example, N could successivly be equal to 1,2,3, etc. and the user would continue to get independent runs out of the single simulation. For this simple example, the following might work:

./simulation 0
...Results for run 0:...
./simulation 1
...Results for run 1:...

Definition at line 79 of file rng-seed-manager.cc.

References NS_LOG_FUNCTION, and ns3::Config::SetGlobal().

Referenced by ns3::olsr::Bug780Test::DoRun(), ns3::olsr::HelloRegressionTest::DoRun(), and ns3::olsr::TcRegressionTest::DoRun().

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void ns3::RngSeedManager::SetSeed ( uint32_t seed )

static

set the seed it will duplicate the seed value 6 times

RngSeedManger::SetSeed(15);
UniformVariable x(2,3);     //these will give the same output everytime
ExponentialVariable y(120); //as long as the seed stays the same

Parameters

seed	Note, while the underlying RNG takes six integer values as a seed; it is sufficient to set these all to the same integer, so we provide a simpler interface here that just takes one integer.

Definition at line 73 of file rng-seed-manager.cc.

References NS_LOG_FUNCTION, and ns3::Config::SetGlobal().

Referenced by SteadyStateRandomWaypointTest::DoRun(), ns3::olsr::Bug780Test::DoRun(), ns3::olsr::HelloRegressionTest::DoRun(), and ns3::olsr::TcRegressionTest::DoRun().

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