xelf::prelude::sync

Struct MappedRwLockWriteGuard

pub struct MappedRwLockWriteGuard<'a, T>where
    T: 'a + ?Sized,
{ /* private fields */ }

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

Expand description

RAII structure used to release the exclusive write access of a lock when dropped, which can point to a subfield of the protected data.

This structure is created by the map and try_map methods on RwLockWriteGuard.

Implementations§

impl<'a, T> MappedRwLockWriteGuard<'a, T>
where T: ?Sized,

pub fn map<U, F>( orig: MappedRwLockWriteGuard<'a, T>, f: F, ) -> MappedRwLockWriteGuard<'a, U>
where F: FnOnce(&mut T) -> &mut U, U: ?Sized,

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

Makes a MappedRwLockWriteGuard for a component of the borrowed data, e.g. an enum variant.

The RwLock is already locked for writing, so this cannot fail.

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

§Panics

If the closure panics, the guard will be dropped (unlocked) and the RwLock will be poisoned.

pub fn try_map<U, F>( orig: MappedRwLockWriteGuard<'a, T>, f: F, ) -> Result<MappedRwLockWriteGuard<'a, U>, MappedRwLockWriteGuard<'a, T>>
where F: FnOnce(&mut T) -> Option<&mut U>, U: ?Sized,

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

Makes a MappedRwLockWriteGuard for a component of the borrowed data. The original guard is returned as an Err(...) if the closure returns None.

The RwLock is already locked for writing, so this cannot fail.

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

§Panics

If the closure panics, the guard will be dropped (unlocked) and the RwLock will be poisoned.

Trait Implementations§

impl<T> Debug for MappedRwLockWriteGuard<'_, T>
where T: Debug + ?Sized,

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

Formats the value using the given formatter. Read more

impl<T> Deref for MappedRwLockWriteGuard<'_, T>
where T: ?Sized,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for MappedRwLockWriteGuard<'_, T>
where T: ?Sized,

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

Mutably dereferences the value.

impl<T> Display for MappedRwLockWriteGuard<'_, T>
where T: Display + ?Sized,

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

Formats the value using the given formatter. Read more

impl<T> Drop for MappedRwLockWriteGuard<'_, T>
where T: ?Sized,

fn drop(&mut self)

Executes the destructor for this type. Read more

impl<T> !Send for MappedRwLockWriteGuard<'_, T>
where T: ?Sized,

impl<T> Sync for MappedRwLockWriteGuard<'_, T>
where T: Sync + ?Sized,

Auto Trait Implementations§

impl<'a, T> Freeze for MappedRwLockWriteGuard<'a, T>
where T: ?Sized,

impl<'a, T> RefUnwindSafe for MappedRwLockWriteGuard<'a, T>
where T: RefUnwindSafe + ?Sized,

impl<'a, T> Unpin for MappedRwLockWriteGuard<'a, T>
where T: ?Sized,

impl<'a, T> !UnwindSafe for MappedRwLockWriteGuard<'a, T>

Blanket Implementations§

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

type Guard = <A as Access<T>>::Guard

A guard object containing the value and keeping it alive. Read more

fn load(&self) -> <P as Access<T>>::Guard

The loading method. Read more

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, A> DynAccess<T> for A
where A: Access<T>, <A as Access<T>>::Guard: 'static,

fn load(&self) -> DynGuard<T>

The equivalent of Access::load.

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

fn to_string(&self) -> String

Converts the given value to a String. 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.

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

impl<T> MaybeSendSync for T