Struct ThreadFastRng 

pub struct ThreadFastRng(/* private fields */);

A thread-local FastRng that is seeded from the global SysRng the first time a thread uses it.

Like FastRng, it’s a small, fast, and non-cryptographic rng with decent statistical properties. Useful for sampling non-security sensitive data.

Shines in multithreaded/async scenarios where don’t want to have to synchronize on a single Mutex<FastRng> or deal with handing out FastRngs to each thread. Instead we let thread-locals handle all the drudgery.

Implementations

impl ThreadFastRng

pub fn new() -> Self

pub fn seed(seed: u64)

Set the current thread local rng seed.

Trait Implementations

impl Default for ThreadFastRng

fn default() -> Self

Returns the “default value” for a type.

impl RngCore for ThreadFastRng

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.