random.hpp File Reference

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Description

Generating (pseudo) random numbers with controlled seed.

As an extension on top of the C++ random number framework, several instances of random number sequence generators can be easily created with a controlled seed. For simplified usage, two default instances are exposed as global variable

• lib::defaultGen uses fixed seeding (planned: make this configurable)
• lib::entropyGen always uses true randomness as seed value.

See also

Random_test

Definition in file random.hpp.

#include "lib/integral.hpp"
#include "lib/hash-value.h"
#include "lib/nocopy.hpp"
#include <random>

Classes
class	CappedGen< GEN >
	Adapter to protect against data corruption caused by concurrent access. More...
class	RandomSequencer< GEN >
	Access point to a selection of random number sources. More...
class	RandomSequencer< GEN >::Seed
class	SeedNucleus
	Establishes a seed point for any instance or performance. More...

Typedefs
using	Random = RandomSequencer< std::mt19937_64 >
	PRNG engine to use by default: 64bit Mersenne twister.

Functions
uint constexpr	_iBOUND ()
template<class GEN >
auto	buildCappedSubSequence (RandomSequencer< GEN > &src)
void	randomiseRandomness ()
	inject true randomness into the defaultGen
lib::HashVal	ranHash ()
int	rani (uint bound=_iBOUND())
double	ranNormal (double mean=0.0, double stdev=1.0)
double	ranRange (double start, double bound)
SeedNucleus &	seedFromDefaultGen ()
	draw seed another Generator from the default RandomSequencer

Namespaces
	lib
	Implementation namespace for support and library code.