rustmax::tokio::sync

Struct OwnedMappedMutexGuard

pub struct OwnedMappedMutexGuard<T, U = T>where
    T: ?Sized,
    U: ?Sized,
{ /* private fields */ }

Expand description

A owned handle to a held Mutex that has had a function applied to it via OwnedMutexGuard::map.

This can be used to hold a subfield of the protected data.

Implementations§

impl<T, U> OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

pub fn map<S, F>( this: OwnedMappedMutexGuard<T, U>, f: F, ) -> OwnedMappedMutexGuard<T, S>
where F: FnOnce(&mut U) -> &mut S,

Makes a new OwnedMappedMutexGuard for a component of the locked data.

This operation cannot fail as the OwnedMappedMutexGuard passed in already locked the mutex.

This is an associated function that needs to be used as OwnedMappedMutexGuard::map(...). A method would interfere with methods of the same name on the contents of the locked data.

pub fn try_map<S, F>( this: OwnedMappedMutexGuard<T, U>, f: F, ) -> Result<OwnedMappedMutexGuard<T, S>, OwnedMappedMutexGuard<T, U>>
where F: FnOnce(&mut U) -> Option<&mut S>,

Attempts to make a new OwnedMappedMutexGuard for a component of the locked data. The original guard is returned if the closure returns None.

This operation cannot fail as the OwnedMutexGuard passed in already locked the mutex.

This is an associated function that needs to be used as OwnedMutexGuard::try_map(...). A method would interfere with methods of the same name on the contents of the locked data.

Trait Implementations§

impl<T, U> Debug for OwnedMappedMutexGuard<T, U>
where U: Debug + ?Sized, T: ?Sized,

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

Formats the value using the given formatter. Read more

impl<T, U> Deref for OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

type Target = U

The resulting type after dereferencing.

fn deref(&self) -> &<OwnedMappedMutexGuard<T, U> as Deref>::Target

Dereferences the value.

impl<T, U> DerefMut for OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

fn deref_mut(&mut self) -> &mut <OwnedMappedMutexGuard<T, U> as Deref>::Target

Mutably dereferences the value.

impl<T, U> Display for OwnedMappedMutexGuard<T, U>
where U: Display + ?Sized, T: ?Sized,

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

Formats the value using the given formatter. Read more

impl<T, U> Drop for OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

fn drop(&mut self)

Executes the destructor for this type. Read more

impl<T, U> Send for OwnedMappedMutexGuard<T, U>
where T: Send + ?Sized, U: Send + ?Sized,

impl<T, U> Sync for OwnedMappedMutexGuard<T, U>
where T: Send + Sync + ?Sized, U: Send + Sync + ?Sized,

Auto Trait Implementations§

impl<T, U> Freeze for OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

impl<T, U = T> !RefUnwindSafe for OwnedMappedMutexGuard<T, U>

impl<T, U> Unpin for OwnedMappedMutexGuard<T, U>
where T: ?Sized, U: ?Sized,

impl<T, U = T> !UnwindSafe for OwnedMappedMutexGuard<T, U>

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> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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> PolicyExt for T
where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more

impl<T> PowerToString for T
where T: ToString + ?Sized,

fn S(&self) -> String

impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)

The target type on which the method may be called.

impl<R> Rng for R
where R: RngCore + ?Sized,

fn random<T>(&mut self) -> T
where StandardUniform: Distribution<T>,

Return a random value via the StandardUniform distribution. Read more

fn random_iter<T>(self) -> Iter<StandardUniform, Self, T> ⓘ
where Self: Sized, StandardUniform: Distribution<T>,

Return an iterator over random variates Read more

fn random_range<T, R>(&mut self, range: R) -> T
where T: SampleUniform, R: SampleRange<T>,

Generate a random value in the given range. Read more

fn random_bool(&mut self, p: f64) -> bool

Return a bool with a probability p of being true. Read more

fn random_ratio(&mut self, numerator: u32, denominator: u32) -> bool

Return a bool with a probability of numerator/denominator of being true. Read more

fn sample<T, D>(&mut self, distr: D) -> T
where D: Distribution<T>,

Sample a new value, using the given distribution. Read more

fn sample_iter<T, D>(self, distr: D) -> Iter<D, Self, T> ⓘ
where D: Distribution<T>, Self: Sized,

Create an iterator that generates values using the given distribution. Read more

fn fill<T>(&mut self, dest: &mut T)
where T: Fill + ?Sized,

Fill any type implementing Fill with random data Read more

fn gen<T>(&mut self) -> T
where StandardUniform: Distribution<T>,

👎Deprecated since 0.9.0: Renamed to random to avoid conflict with the new gen keyword in Rust 2024.

Alias for Rng::random.

fn gen_range<T, R>(&mut self, range: R) -> T
where T: SampleUniform, R: SampleRange<T>,

👎Deprecated since 0.9.0: Renamed to random_range

Alias for Rng::random_range.

fn gen_bool(&mut self, p: f64) -> bool

👎Deprecated since 0.9.0: Renamed to random_bool

Alias for Rng::random_bool.

fn gen_ratio(&mut self, numerator: u32, denominator: u32) -> bool

👎Deprecated since 0.9.0: Renamed to random_ratio

Alias for Rng::random_ratio.

impl<T> RngCore for T
where T: DerefMut, <T as Deref>::Target: RngCore,

fn next_u32(&mut self) -> u32

Return the next random u32. Read more

fn next_u64(&mut self) -> u64

Return the next random u64. Read more

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

Fill dest with random data. Read more

impl<T> Same for T

type Output = T

Should always be Self

impl<T> ToString for T
where T: Display + ?Sized,

fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T> ToStringFallible for T
where T: Display,

fn try_to_string(&self) -> Result<String, TryReserveError>

ToString::to_string, but without panic on OOM.

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

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

Performs the conversion.

impl<R> TryRngCore for R
where R: RngCore,

type Error = Infallible

The type returned in the event of a RNG error.

fn try_next_u32(&mut self) -> Result<u32, <R as TryRngCore>::Error>

Return the next random u32.

fn try_next_u64(&mut self) -> Result<u64, <R as TryRngCore>::Error>

Return the next random u64.

fn try_fill_bytes( &mut self, dst: &mut [u8], ) -> Result<(), <R as TryRngCore>::Error>

Fill dest entirely with random data.

fn unwrap_err(self) -> UnwrapErr<Self>
where Self: Sized,

Wrap RNG with the UnwrapErr wrapper.

fn read_adapter(&mut self) -> RngReadAdapter<'_, Self> ⓘ
where Self: Sized,

Convert an RngCore to a RngReadAdapter.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

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where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

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Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

impl<T> CryptoRng for T
where T: DerefMut, <T as Deref>::Target: CryptoRng,

impl<T> ErasedDestructor for T
where T: 'static,

impl<R> TryCryptoRng for R
where R: CryptoRng,