pass::seed Class Reference

#include <seed.hpp>

Public Member Functions
	seed ()=delete
	seed (const seed &)=delete
seed &	operator= (const seed &)=delete

Static Public Member Functions
static std::mt19937_64 &	get_generator ()
static void	set_seed (const arma::arma_rng::seed_type seed)
static void	set_random_seed ()
static arma::arma_rng::seed_type	get_seed ()

Static Protected Attributes
static arma::arma_rng::seed_type	seed_
static std::mt19937_64	generator_

Constructor & Destructor Documentation

seed() [1/2]

pass::seed::seed ( )

delete

The random number generator should act as a singleton, no need for default constructors.

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seed() [2/2]

pass::seed::seed ( const seed &  )

delete

Member Function Documentation

get_generator()

std::mt19937_64 & pass::seed::get_generator ( )

static

The std::mersenne_twister_engine requires an l-value (a reference in this case) instead of an r-value. Otherwise, calls like std::uniform_real_distribution<double>(0, 1)(seed::get_generator()) won't compile.

get_seed()

arma::arma_rng::seed_type pass::seed::get_seed ( )

static

Gets the seed if you want to reproduce the experiment

operator=()

seed& pass::seed::operator= ( const seed &  )

delete

set_random_seed()

void pass::seed::set_random_seed ( )

static

Initialise Armadillo's generator with any random seed. This seed will be overwritten later on, no need to store it.

For programs using MPI, each node needs to seeded differently in order to avoid a degeneration of the random number generator, due to synchronisation. Basically, we generated as much random numbers as there are nodes and seed the i-th node by the i-th generated random number.

Without MPI, using the first random number generated by Armadillo's generator as seed is sufficient.

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set_seed()

void pass::seed::set_seed ( const arma::arma_rng::seed_type  seed )

static

Seeding C++'s and Armadillo's generator.

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Member Data Documentation

generator_

std::mt19937_64 pass::seed::generator_

staticprotected

seed_

arma::arma_rng::seed_type pass::seed::seed_

staticprotected

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

• /Users/romeo/Desktop/PASS/include/pass_bits/helper/seed.hpp
• /Users/romeo/Desktop/PASS/src/helper/seed.cpp