Struct RwLockReadGuard 

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

Shared access to a RwLock’s value, or to a component of it; releases on drop.

The release is one atomic read-modify-write when no waiter needs telling. Otherwise it is lock-free, not wait-free: it returns after one pass over the queue, plus at most one for each operation of another thread that lands on the queue meanwhile (see Progress).

Implementations

impl<'a, T: ?Sized> RwLockReadGuard<'a, T>

pub fn map<F, U>(this: Self, f: F) -> RwLockReadGuard<'a, U>

where U: ?Sized, F: FnOnce(&T) -> &U,

A guard for a component of the locked data. It cannot fail: this guard already holds a read.

An associated function, RwLockReadGuard::map(guard, f): a method would shadow methods of the locked data.

pub fn try_map<F, U>(this: Self, f: F) -> Result<RwLockReadGuard<'a, U>, Self>

where U: ?Sized, F: FnOnce(&T) -> Option<&U>,

map that gives the guard back when f finds no component, with the read still held.

Trait Implementations

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

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

Formats the value using the given formatter.

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

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

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

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

Formats the value using the given formatter.

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

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

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

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl<T: ?Sized + Sync> Send for RwLockReadGuard<'_, T>

impl<T: ?Sized + Send + Sync> Sync for RwLockReadGuard<'_, T>