Struct AtomicLazyCell

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

A lazily filled and thread-safe Cell, with frozen contents.

Implementations

impl<T> AtomicLazyCell<T>

pub const NONE: Self = _

An empty AtomicLazyCell.

pub fn new() -> AtomicLazyCell<T>

Creates a new, empty, AtomicLazyCell.

pub fn fill(&self, t: T) -> Result<(), T>

Put a value into this cell.

This function will return Err(value) if the cell is already full.

pub fn replace(&mut self, value: T) -> Option<T>

Put a value into this cell.

Note that this function is infallible but requires &mut self. By requiring &mut self we’re guaranteed that no active borrows to this cell can exist so we can always fill in the value. This may not always be usable, however, as &mut self may not be possible to borrow.

Return value

This function returns the previous value, if any.

pub fn filled(&self) -> bool

Test whether this cell has been previously filled.

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

Borrows the contents of this lazy cell for the duration of the cell itself.

This function will return Some if the cell has been previously initialized, and None if it has not yet been initialized.

pub fn into_inner(self) -> Option<T>

Consumes this LazyCell, returning the underlying value.

impl<T: Copy> AtomicLazyCell<T>

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

Returns a copy of the contents of the lazy cell.

This function will return Some if the cell has been previously initialized, and None if it has not yet been initialized.

Trait Implementations

impl<T: Clone> Clone for AtomicLazyCell<T>

fn clone(&self) -> AtomicLazyCell<T>

Create a clone of this AtomicLazyCell

If self has not been initialized, returns an uninitialized AtomicLazyCell otherwise returns an AtomicLazyCell already initialized with a clone of the contents of self.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for AtomicLazyCell<T>

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

Formats the value using the given formatter.

impl<T> Default for AtomicLazyCell<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Send> Send for AtomicLazyCell<T>

impl<T: Sync + Send> Sync for AtomicLazyCell<T>