Stats::RandGen Class Reference

Uniform Random Generator Not thread-safe to preserve performance. In multi-threaded context, use one generator per thread. More...

Inheritance diagram for Stats::RandGen:

Public Member Functions
	RandGen ()
double	get () const override
	Uniform [0-1]. More...
int	getIndex (int sz) const
	random index in the range [0,sz> More...
od_int64	getIndex (od_int64 sz) const
	random index in the range [0,sz> More...
int	getIndexFast (int sz, int) const
od_int64	getIndexFast (od_int64 sz, od_int64) const
int	getInt () const
	Uniform int. More...
int	getInt (int min, int max) const
	random int in the range [min,max]> More...
bool	init (int seed) override
	Not for production. More...
template<class ODSET >
void	subselect (ODSET &ods, od_int64 targetsz) const
template<class T >
void	subselect (T &, od_int64 targetsz) const
template<class T , class SzTp >
void	subselect (T *, SzTp sz, SzTp targetsz) const
Public Member Functions inherited from Stats::RandomGenerator
virtual	~RandomGenerator ()

Private Member Functions
	mOD_DisableCopy (RandGen)

Private Attributes
std::mt19937_64	gen64_
std::mt19937	gen_
std::random_device	rd_
Threads::Atomic< int >	seedval_ = mUdf(int)

Detailed Description

Uniform Random Generator Not thread-safe to preserve performance. In multi-threaded context, use one generator per thread.

<>

Constructor & Destructor Documentation

RandGen()

Stats::RandGen::RandGen

(

)

Member Function Documentation

get()

double Stats::RandGen::get ( ) const

overridevirtual

Uniform [0-1].

Implements Stats::RandomGenerator.

getIndex() [1/2]

int Stats::RandGen::getIndex

(

int

sz

)

const

random index in the range [0,sz>

getIndex() [2/2]

od_int64 Stats::RandGen::getIndex

(

od_int64

sz

)

const

random index in the range [0,sz>

getIndexFast() [1/2]

int Stats::RandGen::getIndexFast ( int  sz, int    ) const

inline

getIndexFast() [2/2]

od_int64 Stats::RandGen::getIndexFast ( od_int64  sz, od_int64    ) const

inline

getInt() [1/2]

int Stats::RandGen::getInt

(

)

const

Uniform int.

getInt() [2/2]

int Stats::RandGen::getInt	(	int	min,
		int	max
	)		const

random int in the range [min,max]>

init()

bool Stats::RandGen::init ( int  seed )

overridevirtual

Not for production.

Reimplemented from Stats::RandomGenerator.

mOD_DisableCopy()

Stats::RandGen::mOD_DisableCopy ( RandGen  )

private

subselect() [1/3]

template<class ODSET >

void Stats::RandGen::subselect ( ODSET &  ods, od_int64  targetsz  ) const

inline

subselect() [2/3]

template<class T >

void Stats::RandGen::subselect	(	T &	,
		od_int64	targetsz
	)		const

Does not preserve order The removed items will really be erased

subselect() [3/3]

template<class T , class SzTp >

void Stats::RandGen::subselect ( T *  arr, SzTp  sz, SzTp  targetsz  ) const

inline

Does not preserve order. Afterwards, the 'removed' values occupy the indexes targetsz - maxsz-1

Member Data Documentation

gen64_

std::mt19937_64 Stats::RandGen::gen64_

mutableprivate

gen_

std::mt19937 Stats::RandGen::gen_

mutableprivate

rd_

std::random_device Stats::RandGen::rd_

private

seedval_

Threads::Atomic<int> Stats::RandGen::seedval_ = mUdf(int)

private