[−][src]Struct rand::rngs::ThreadRng
The type returned by thread_rng, essentially just a reference to the
PRNG in thread-local memory.
ThreadRng uses ReseedingRng wrapping the same PRNG as StdRng,
which is reseeded after generating 32 MiB of random data. A single instance
is cached per thread and the returned ThreadRng is a reference to this
instance — hence ThreadRng is neither Send nor Sync but is safe to use
within a single thread. This RNG is seeded and reseeded via EntropyRng
as required.
Note that the reseeding is done as an extra precaution against entropy
leaks and is in theory unnecessary — to predict ThreadRng's output, an
attacker would have to either determine most of the RNG's seed or internal
state, or crack the algorithm used.
Like StdRng, ThreadRng is a cryptographically secure PRNG. The current
algorithm used is HC-128, which is an array-based PRNG that trades memory
usage for better performance. This makes it similar to ISAAC, the algorithm
used in ThreadRng before rand 0.5.
Cloning this handle just produces a new reference to the same thread-local generator.
Trait Implementations
impl Clone for ThreadRng[src]
impl Clone for ThreadRngfn clone(&self) -> ThreadRng[src]
fn clone(&self) -> ThreadRngReturns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl Debug for ThreadRng[src]
impl Debug for ThreadRngfn fmt(&self, f: &mut Formatter) -> Result[src]
fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl RngCore for ThreadRng[src]
impl RngCore for ThreadRngfn next_u32(&mut self) -> u32[src]
fn next_u32(&mut self) -> u32Return the next random u32. Read more
fn next_u64(&mut self) -> u64[src]
fn next_u64(&mut self) -> u64Return the next random u64. Read more
fn fill_bytes(&mut self, dest: &mut [u8])[src]
fn fill_bytes(&mut self, dest: &mut [u8])Fill dest with random data. Read more
fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>[src]
fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>Fill dest entirely with random data. Read more
impl CryptoRng for ThreadRng[src]
impl CryptoRng for ThreadRngAuto Trait Implementations
Blanket Implementations
impl<R> Rng for R where
R: RngCore + ?Sized, [src]
impl<R> Rng for R where
R: RngCore + ?Sized, fn gen<T>(&mut self) -> T where
Standard: Distribution<T>, [src]
fn gen<T>(&mut self) -> T where
Standard: Distribution<T>, Return a random value supporting the [Standard] distribution. Read more
fn gen_range<T: PartialOrd + SampleUniform>(&mut self, low: T, high: T) -> T[src]
fn gen_range<T: PartialOrd + SampleUniform>(&mut self, low: T, high: T) -> TGenerate a random value in the range [low, high), i.e. inclusive of low and exclusive of high. Read more
fn sample<T, D: Distribution<T>>(&mut self, distr: D) -> T[src]
fn sample<T, D: Distribution<T>>(&mut self, distr: D) -> TSample a new value, using the given distribution. Read more
ⓘImportant traits for DistIter<'a, D, R, T>fn sample_iter<'a, T, D: Distribution<T>>(
&'a mut self,
distr: &'a D
) -> DistIter<'a, D, Self, T> where
Self: Sized, [src]
fn sample_iter<'a, T, D: Distribution<T>>(
&'a mut self,
distr: &'a D
) -> DistIter<'a, D, Self, T> where
Self: Sized, Create an iterator that generates values using the given distribution. Read more
fn fill<T: AsByteSliceMut + ?Sized>(&mut self, dest: &mut T)[src]
fn fill<T: AsByteSliceMut + ?Sized>(&mut self, dest: &mut T)Fill dest entirely with random bytes (uniform value distribution), where dest is any type supporting [AsByteSliceMut], namely slices and arrays over primitive integer types (i8, i16, u32, etc.). Read more
fn try_fill<T: AsByteSliceMut + ?Sized>(
&mut self,
dest: &mut T
) -> Result<(), Error>[src]
fn try_fill<T: AsByteSliceMut + ?Sized>(
&mut self,
dest: &mut T
) -> Result<(), Error>Fill dest entirely with random bytes (uniform value distribution), where dest is any type supporting [AsByteSliceMut], namely slices and arrays over primitive integer types (i8, i16, u32, etc.). Read more
fn gen_bool(&mut self, p: f64) -> bool[src]
fn gen_bool(&mut self, p: f64) -> boolReturn a bool with a probability p of being true. Read more
fn choose<'a, T>(&mut self, values: &'a [T]) -> Option<&'a T>[src]
fn choose<'a, T>(&mut self, values: &'a [T]) -> Option<&'a T>Return a random element from values. Read more
fn choose_mut<'a, T>(&mut self, values: &'a mut [T]) -> Option<&'a mut T>[src]
fn choose_mut<'a, T>(&mut self, values: &'a mut [T]) -> Option<&'a mut T>Return a mutable pointer to a random element from values. Read more
fn shuffle<T>(&mut self, values: &mut [T])[src]
fn shuffle<T>(&mut self, values: &mut [T])Shuffle a mutable slice in place. Read more
ⓘImportant traits for Generator<T, R>fn gen_iter<T>(&mut self) -> Generator<T, &mut Self> where
Standard: Distribution<T>, [src]
fn gen_iter<T>(&mut self) -> Generator<T, &mut Self> where
Standard: Distribution<T>, : use Rng::sample_iter(&Standard) instead
Return an iterator that will yield an infinite number of randomly generated items. Read more
fn gen_weighted_bool(&mut self, n: u32) -> bool[src]
fn gen_weighted_bool(&mut self, n: u32) -> bool: use gen_bool instead
Return a bool with a 1 in n chance of true Read more
ⓘImportant traits for AsciiGenerator<R>fn gen_ascii_chars(&mut self) -> AsciiGenerator<&mut Self>[src]
fn gen_ascii_chars(&mut self) -> AsciiGenerator<&mut Self>: use sample_iter(&Alphanumeric) instead
Return an iterator of random characters from the set A-Z,a-z,0-9. Read more
impl<T, U> Into for T where
U: From<T>, [src]
impl<T, U> Into for T where
U: From<T>, impl<T> ToOwned for T where
T: Clone, [src]
impl<T> ToOwned for T where
T: Clone, type Owned = T
fn to_owned(&self) -> T[src]
fn to_owned(&self) -> TCreates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)[src]
fn clone_into(&self, target: &mut T)🔬 This is a nightly-only experimental API. (toowned_clone_into)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T[src]
impl<T> From for Timpl<T, U> TryFrom for T where
T: From<U>, [src]
impl<T, U> TryFrom for T where
T: From<U>, type Error = !
try_from)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>try_from)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized, [src]
impl<T> Borrow for T where
T: ?Sized, impl<T> BorrowMut for T where
T: ?Sized, [src]
impl<T> BorrowMut for T where
T: ?Sized, fn borrow_mut(&mut self) -> &mut T[src]
fn borrow_mut(&mut self) -> &mut TMutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>, [src]
impl<T, U> TryInto for T where
U: TryFrom<T>, type Error = <U as TryFrom<T>>::Error
try_from)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>try_from)Performs the conversion.
impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Any for T where
T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src]
fn get_type_id(&self) -> TypeId🔬 This is a nightly-only experimental API. (get_type_id)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more