clcg32.h

//==========================================================================
//  CLCG32.CC - part of
//                 OMNeT++/OMNEST
//              Discrete System Simulation in C++
//
//==========================================================================
 
/*--------------------------------------------------------------*
  Copyright (C) 2002-2017 Andras Varga
  Copyright (C) 2006-2017 OpenSim Ltd.
 
  This file is distributed WITHOUT ANY WARRANTY. See the file
  `license' for details on this and other legal matters.
*--------------------------------------------------------------*/
 
#ifndef __OMNETPP_CLCG32_H
#define __OMNETPP_CLCG32_H
 
#include "simkerneldefs.h"
#include "globals.h"
#include "crng.h"
#include "cconfiguration.h"
 
namespace omnetpp {
 
 
#define LCG32_MAX  0x7ffffffeL  /* = 2^31-2 */
 
class SIM_API cLCG32 : public cRNG
{
  protected:
    int32_t seed;
 
    // 256 pre-generated seeds, spaced 8,388,608 values in the sequence.
    // This covers the whole RNG period. Enough for 128 runs with 2 RNGs
    // each, or 64 runs with 4 RNGs each -- assuming one run never uses
    // more than 8 million random numbers per RNG.
    static const int32_t autoSeeds[256];
 
  public:
    cLCG32() {}
    virtual ~cLCG32() {}
 
    virtual void initialize(int seedSet, int rngId, int numRngs,
                            int parsimProcId, int parsimNumPartitions,
                            cConfiguration *cfg) override;
 
    virtual void selfTest() override;
 
    virtual uint32_t intRand() override;
 
    virtual uint32_t intRandMax() override;
 
    virtual uint32_t intRand(uint32_t n) override;
 
    virtual double doubleRand() override;
 
    virtual double doubleRandNonz() override;
 
    virtual double doubleRandIncl1() override;
};
 
}  // namespace omnetpp
 
 
#endif