Struct Xoshiro128Plus 

pub struct Xoshiro128Plus { /* private fields */ }

A xoshiro128+ random number generator.

The xoshiro128+ algorithm is not suitable for cryptographic purposes, but is very fast and has good statistical properties, besides a low linear complexity in the lowest bits.

The algorithm used here is translated from the xoshiro128starstar.c reference source code by David Blackman and Sebastiano Vigna.

Implementations

impl Xoshiro128Plus

pub fn jump(&mut self)

Jump forward, equivalently to 2^64 calls to next_u32().

This can be used to generate 2^64 non-overlapping subsequences for parallel computations.

use rand_xoshiro::rand_core::SeedableRng;
use rand_xoshiro::Xoroshiro128StarStar;

let rng1 = Xoroshiro128StarStar::seed_from_u64(0);
let mut rng2 = rng1.clone();
rng2.jump();
let mut rng3 = rng2.clone();
rng3.jump();

pub fn initialize_states(seed: u64, num_states: usize) -> Vec<Self>

Available on non-CUDA only.

Initializes multiple RNG states such that each state corresponds to a subsequence separated by 2**64 steps from eachother in the main sequence. This ensures that as long as no state requests more than 2**64 random numbers, the states are guaranteed to be fully independent.

Trait Implementations

impl Clone for Xoshiro128Plus

fn clone(&self) -> Xoshiro128Plus

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Xoshiro128Plus

impl Debug for Xoshiro128Plus

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl DeviceCopy for Xoshiro128Plus

impl Eq for Xoshiro128Plus

impl PartialEq for Xoshiro128Plus

fn eq(&self, other: &Xoshiro128Plus) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl RngCore for Xoshiro128Plus

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data.

impl SeedableRng for Xoshiro128Plus

fn from_seed(seed: [u8; 16]) -> Xoshiro128Plus

Create a new Xoshiro128Plus. If seed is entirely 0, it will be mapped to a different seed.

fn seed_from_u64(seed: u64) -> Xoshiro128Plus

Seed a Xoshiro128Plus from a u64 using SplitMix64.

type Seed = [u8; 16]

Seed type, which is restricted to types mutably-dereferenceable as u8 arrays (we recommend [u8; N] for some N).

fn from_rng<R>(rng: R) -> Result<Self, Error>

where R: RngCore,

Create a new PRNG seeded from another Rng.

impl StructuralPartialEq for Xoshiro128Plus