open_coroutine_queue::rand

Struct FastRand

#[repr(C)]
pub struct FastRand { /* private fields */ }

Expand description

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

Implementations§

impl FastRand

pub fn new(seed: RngSeed) -> FastRand

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

pub fn replace_seed(&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.

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

Trait Implementations§

impl Debug for FastRand

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl !Freeze for FastRand

impl !RefUnwindSafe for FastRand

impl Send for FastRand

impl !Sync for FastRand

impl Unpin for FastRand

impl UnwindSafe for FastRand

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.