Struct holochain::prelude::dependencies::kitsune_p2p_types::dependencies::lair_keystore_api::dependencies::tokio::sync::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 = T> !RefUnwindSafe for OwnedMappedMutexGuard<T, U>

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

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

Blanket Implementations§

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

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Gets the TypeId of self. Read more

impl<T> Any for T
where T: Any,

fn into_any(self: Box<T>) -> Box<dyn Any>

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type ArchivedMetadata = ()

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Converts some archived metadata to the pointer metadata for itself.

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

Mutably borrows from an owned value. Read more

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

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const ALIGN: usize = _

The alignment of pointer.

type Init = T

The type for initializers.

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

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unsafe fn drop(ptr: usize)

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

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type Metadata = ()

The type for metadata in pointers and references to Self.

impl<T> Same for T

type Output = T

Should always be Self

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The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

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Checks if self is actually part of its subset T (and can be converted to it).

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Use with care! Same as self.to_subset but without any property checks. Always succeeds.

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The inclusion map: converts self to the equivalent element of its superset.

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The type returned in the event of a conversion error.

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where U: TryFrom<T>,

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