Struct futures_util::lock::Mutex

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pub struct Mutex<T: ?Sized> { /* private fields */ }
Expand description

A futures-aware mutex.

Fairness

This mutex provides no fairness guarantees. Tasks may not acquire the mutex in the order that they requested the lock, and it’s possible for a single task which repeatedly takes the lock to starve other tasks, which may be left waiting indefinitely.

Implementations§

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impl<T> Mutex<T>

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pub fn new(t: T) -> Self

Creates a new futures-aware mutex.

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pub fn into_inner(self) -> T

Consumes this mutex, returning the underlying data.

Examples
use futures::lock::Mutex;

let mutex = Mutex::new(0);
assert_eq!(mutex.into_inner(), 0);
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impl<T: ?Sized> Mutex<T>

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pub fn try_lock(&self) -> Option<MutexGuard<'_, T>>

Attempt to acquire the lock immediately.

If the lock is currently held, this will return None.

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pub fn try_lock_owned(self: &Arc<Self>) -> Option<OwnedMutexGuard<T>>

Attempt to acquire the lock immediately.

If the lock is currently held, this will return None.

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pub fn lock(&self) -> MutexLockFuture<'_, T>

Acquire the lock asynchronously.

This method returns a future that will resolve once the lock has been successfully acquired.

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pub fn lock_owned(self: Arc<Self>) -> OwnedMutexLockFuture<T>

Acquire the lock asynchronously.

This method returns a future that will resolve once the lock has been successfully acquired.

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pub fn get_mut(&mut self) -> &mut T

Returns a mutable reference to the underlying data.

Since this call borrows the Mutex mutably, no actual locking needs to take place – the mutable borrow statically guarantees no locks exist.

Examples
use futures::lock::Mutex;

let mut mutex = Mutex::new(0);
*mutex.get_mut() = 10;
assert_eq!(*mutex.lock().await, 10);

Trait Implementations§

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impl<T: ?Sized> Debug for Mutex<T>

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

Formats the value using the given formatter. Read more
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impl<T: Default> Default for Mutex<T>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<T> From<T> for Mutex<T>

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fn from(t: T) -> Self

Converts to this type from the input type.
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impl<T: ?Sized + Send> Send for Mutex<T>

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impl<T: ?Sized + Send> Sync for Mutex<T>

Auto Trait Implementations§

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impl<T> !RefUnwindSafe for Mutex<T>

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impl<T: ?Sized> Unpin for Mutex<T>
where T: Unpin,

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impl<T: ?Sized> UnwindSafe for Mutex<T>
where T: UnwindSafe,

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<!> for T

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fn from(t: !) -> T

Converts to this type from the input type.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.