Struct tokio::util::rand::FastRand

pub(crate) struct FastRand {
    one: u32,
    two: u32,
}

Fast random number generate.

Implement xorshift64+: 2 32-bit xorshift sequences added together. Shift triplet [17,7,16] was calculated as indicated in Marsaglia’s Xorshift paper: https://www.jstatsoft.org/article/view/v008i14/xorshift.pdf This generator passes the SmallCrush suite, part of TestU01 framework: http://simul.iro.umontreal.ca/testu01/tu01.html

Fields

one: u32

two: u32

Implementations

impl FastRand

pub(crate) fn replace_seed(&mut self, seed: RngSeed) -> RngSeed

Replaces the state of the random number generator with the provided seed, returning the seed that represents the previous state of the random number generator.

The random number generator will become equivalent to one created with the same seed.

impl FastRand

pub(crate) fn new() -> FastRand

Initialize a new fast random number generator using the default source of entropy.

pub(crate) fn from_seed(seed: RngSeed) -> FastRand

Initializes a new, thread-local, fast random number generator.

pub(crate) fn fastrand_n(&mut self, n: u32) -> u32

fn fastrand(&mut self) -> u32

Trait Implementations

impl Clone for FastRand

fn clone(&self) -> FastRand

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FastRand

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

Formats the value using the given formatter.

impl Copy for FastRand