#include <crng.h>
Inheritance diagram for cRNG:
Some known implementations are cMersenneTwister
, cLCG32
and cAkaroaRNG
. The actual RNG class to be used in simulations can be configured (a feature of the Envir library).
To switch to your own RNG, subclass cRNG, register your new class with the Register_Class() macro, then select it by adding the following to omnetpp.ini
:
[General] rng-class="MyClass"
See also cModule::rng().
Public Member Functions | |
virtual void | initialize (int runNumber, int rngId, int numRngs, int parsimProcId, int parsimNumPartitions, cConfiguration *cfg)=0 |
virtual void | selfTest ()=0 |
virtual unsigned long | numbersDrawn () |
virtual unsigned long | intRand ()=0 |
virtual unsigned long | intRandMax ()=0 |
virtual unsigned long | intRand (unsigned long n)=0 |
virtual double | doubleRand ()=0 |
virtual double | doubleRandNonz ()=0 |
virtual double | doubleRandIncl1 ()=0 |
double | doubleRandNonzIncl1 () |
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Random double on the [0,1) interval.
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Random double on the [0,1] interval.
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Random double on the (0,1) interval.
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Random double on the (0,1] interval.
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Called by the simulation framework to set up the RNG at the start of a simulation run. Seed selection should take place here. |
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Random integer in [0,n), n < intRandMax().
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Random integer in the range [0,intRandMax()].
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Maximum value that can be returned by intRand(), e.g. 2^31-2 with LCG32. |
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Returns how many random numbers have been drawn from this RNG. Subclasses should increment numDrawn in the intRand(), etc. methods. |
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Coarse test for the correctness of the RNG algorithm. It should detect platform-dependent bugs (e.g. caused by different word size or compiler anomaly). The method should throw an exception if something is wrong. It is invoked only once, when the simulation program starts up. |