__gnu_parallel::_RandomNumber Class Reference

Random number generator, based on the Mersenne twister. More...

#include <random_number.h>

Collaboration diagram for __gnu_parallel::_RandomNumber:

Public Member Functions
	_RandomNumber ()
	Default constructor. More...
	_RandomNumber (uint32_t __seed, uint64_t _M_supremum=0x100000000ULL)
	Constructor. More...
unsigned long	__genrand_bits (int __bits)
	Generate a number of random bits, run-time parameter. More...
uint32_t	operator() ()
	Generate unsigned random 32-bit integer. More...
uint32_t	operator() (uint64_t local_supremum)
	Generate unsigned random 32-bit integer in the interval [0,local_supremum). More...

Static Private Member Functions
static uint32_t	__scale_down (uint64_t __x, uint64_t _M_supremum, double)

Private Attributes
int	__bits_left
uint64_t	__cache
std::tr1::mt19937	_M_mt
uint64_t	_M_rand_sup
double	_M_rand_sup_reciprocal
uint64_t	_M_supremum
double	_M_supremum_reciprocal

Detailed Description

Random number generator, based on the Mersenne twister.

Constructor & Destructor Documentation

__gnu_parallel::_RandomNumber::_RandomNumber ( )

inline

Default constructor.

Seed with 0.

__gnu_parallel::_RandomNumber::_RandomNumber ( uint32_t  __seed, uint64_t  _M_supremum = 0x100000000ULL  )

inline

Constructor.

Parameters

__seed	Random __seed.
_M_supremum	Generate integer random numbers in the interval [0,_M_supremum).

Member Function Documentation

unsigned long __gnu_parallel::_RandomNumber::__genrand_bits ( int  __bits )

inline

Generate a number of random bits, run-time parameter.

Parameters

__bits

Number of bits to generate.

References _M_mt.

static uint32_t __gnu_parallel::_RandomNumber::__scale_down ( uint64_t  __x, uint64_t  _M_supremum, double    )

inlinestaticprivate

References _M_supremum.

Referenced by operator()().

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uint32_t __gnu_parallel::_RandomNumber::operator() ( )

inline

Generate unsigned random 32-bit integer.

References __scale_down(), and _M_mt.

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uint32_t __gnu_parallel::_RandomNumber::operator() ( uint64_t  local_supremum )

inline

Generate unsigned random 32-bit integer in the interval [0,local_supremum).

References __scale_down(), and _M_mt.

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Member Data Documentation

int __gnu_parallel::_RandomNumber::__bits_left

private

uint64_t __gnu_parallel::_RandomNumber::__cache

private

std::tr1::mt19937 __gnu_parallel::_RandomNumber::_M_mt

private

Referenced by __genrand_bits(), and operator()().

uint64_t __gnu_parallel::_RandomNumber::_M_rand_sup

private

double __gnu_parallel::_RandomNumber::_M_rand_sup_reciprocal

private

uint64_t __gnu_parallel::_RandomNumber::_M_supremum

private

Referenced by __scale_down().

double __gnu_parallel::_RandomNumber::_M_supremum_reciprocal

private

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The documentation for this class was generated from the following file:

• /usr/include/c++/5/parallel/random_number.h