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/* |
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/* |
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* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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* |
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* The University of Notre Dame grants you ("Licensee") a |
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#define MATH_PARALLELRANDNUMGEN_HPP |
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#include <vector> |
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#include "MersenneTwister.hpp" |
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#include "utils/simError.h" |
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#include "math/RandNumGen.hpp" |
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#ifdef IS_MPI |
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namespace oopse { |
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/** |
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* @class ParallelRandNumGen a parallel random number generator |
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* @note use MTRand if you want a non-parallel random number generator in MPI enviroment |
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*/ |
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class ParallelRandNumGen{ |
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public: |
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typedef unsigned long uint32; |
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ParallelRandNumGen( const uint32& oneSeed); |
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ParallelRandNumGen(); |
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~ParallelRandNumGen() { |
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delete mtRand_; |
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} |
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/** Returns a real number in [0,1] */ |
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double rand() { |
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return mtRand_->rand(); |
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} |
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/** Returns a real number in [0, n] */ |
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double rand( const double& n ) { |
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return mtRand_->rand(n); |
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} |
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/** Returns a real number in [0, 1) */ |
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double randExc() { |
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return mtRand_->randExc(); |
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} |
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/** Returns a real number in [0, n) */ |
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double randExc( const double& n ) { |
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return mtRand_->randExc(n); |
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} |
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/** Returns a real number in (0, 1) */ |
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double randDblExc() { |
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return mtRand_->randDblExc(); |
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} |
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/** Returns a real number in (0, n) */ |
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double randDblExc( const double& n ) { |
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return mtRand_->randDblExc(n); |
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} |
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/** Returns aninteger in [0,2^32-1] */ |
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uint32 randInt() { |
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return mtRand_->randInt(); |
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} |
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/** Returns aninteger in [0, n] for n < 2^32 */ |
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uint32 randInt( const uint32& n ) { |
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return mtRand_->randInt(n); |
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} |
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/** Returns a 53-bitreal number in [0,1) (capacity of IEEE double precision) */ |
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double rand53() { |
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return mtRand_->rand53(); |
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} |
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/** Access to nonuniform random number distributions */ |
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double randNorm( const double& mean, const double& variance) { |
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return mtRand_->randNorm(mean, variance); |
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} |
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// Re-seeding functions with same behavior as initializers |
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void seed( const uint32 oneSeed ); |
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void seed(); |
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private: |
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MTRand* mtRand_; |
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static int nCreatedRNG_; /**< number of created random number of generator*/ |
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}; |
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/** |
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* @class ParallelRandNumGen a parallel random number generator |
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* @note use SeqRandNumGen if you want a non-parallel random number |
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* generator. |
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*/ |
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class ParallelRandNumGen : public RandNumGen{ |
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public: |
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typedef unsigned long uint32; |
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ParallelRandNumGen( const uint32& oneSeed); |
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ParallelRandNumGen(); |
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virtual void seed( const uint32 oneSeed ); |
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virtual void seed(); |
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private: |
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ParallelRandNumGen(const ParallelRandNumGen&); |
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ParallelRandNumGen& operator =(const ParallelRandNumGen&); |
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static int nCreatedRNG_; /**< number of random number |
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generators created */ |
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int myRank_; |
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}; |
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} |
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#endif |
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#endif |
