Struct lazycell::AtomicLazyCell

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

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

Methods

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) is 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: Debug> Debug for AtomicLazyCell<T>

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

Formats the value using the given formatter.

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

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

impl<T: Default> Default for AtomicLazyCell<T>

fn default() -> AtomicLazyCell<T>

Returns the "default value" for a type.