Struct SharedCell 

pub struct SharedCell<T> { /* private fields */ }

Available on crate feature std only.

Atomic shared version of OnceLock - backed by an Arc<RwLock<Option<T>>>.

let value = SharedCell::<bool>::empty(); // or default()
assert_eq!(None, value.take());

value.set(true);
assert_eq!(Some(true), value.take());
assert_eq!(None, value.take());

Implementations

impl<T> SharedCell<T>

pub fn empty() -> Self

Creates a new, unset cell.

pub fn new(val: T) -> Self

Create a new, set cell with the provided value.

pub fn set(&self, val: T)

Sets the value, throwing away any old value

pub fn take(&self) -> Option<T>

Takes the value, if previously set.

pub fn peek<V: Fn(Option<&T>)>(&self, func: V)

Peeks at the value, does not consume it.

pub fn as_ref(&self) -> ReadGuard<'_, T>

Returns a shared (locked) reference to the inner object

pub fn peek_mut<V: FnMut(Option<&mut T>)>(&self, func: V)

Mutably peeks at the value, allows for edits.

pub fn as_mut(&self) -> WriteGuard<'_, T>

Returns a mutable (locked) reference to the inner object.

Trait Implementations

impl<T> Clone for SharedCell<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for SharedCell<T>

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

Formats the value using the given formatter.

impl<T> Default for SharedCell<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T> From<Option<T>> for SharedCell<T>

fn from(value: Option<T>) -> Self

Converts to this type from the input type.