Struct rand::rngs::ThreadRng

pub struct ThreadRng { /* fields omitted */ }

This is supported on crate features std and std_rng only.

A reference to the thread-local generator

An instance can be obtained via thread_rng or via ThreadRng::default(). This handle is safe to use everywhere (including thread-local destructors) but cannot be passed between threads (is not Send or Sync).

ThreadRng uses the same PRNG as StdRng for security and performance and is automatically seeded from OsRng.

Unlike StdRng, ThreadRng uses the ReseedingRng wrapper to reseed the PRNG from fresh entropy every 64 kiB of random data as well as after a fork on Unix (though not quite immediately; see documentation of ReseedingRng). Note that the reseeding is done as an extra precaution against side-channel attacks and mis-use (e.g. if somehow weak entropy were supplied initially). The PRNG algorithms used are assumed to be secure.

Trait Implementations

impl Clone for ThreadRng

pub fn clone(&self) -> ThreadRng

Returns a copy of the value.

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

Performs copy-assignment from source.

impl CryptoRng for ThreadRng

impl Debug for ThreadRng

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

Formats the value using the given formatter.

impl Default for ThreadRng

pub fn default() -> ThreadRng

Returns the "default value" for a type.

impl RngCore for ThreadRng

pub fn next_u32(&mut self) -> u32

Return the next random u32.

pub fn next_u64(&mut self) -> u64

Return the next random u64.

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

Fill dest with random data.

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

Fill dest entirely with random data.