Struct CallbackCell

pub struct CallbackCell(/* private fields */);

Like an Atomic<Option<Box<dyn FnOnce() + Send + 'static>>>.

See CallbackCellArgs for a version with args.

Implementations

impl CallbackCell

pub fn new() -> Self

Construct with no callback.

pub fn put<F: FnOnce() + Send + 'static>(&self, f: F)

Atomically set the callback.

pub fn take_call(&self) -> bool

Atomically take the callback then run it.

Returns true if a callback was present.

Trait Implementations

impl Debug for CallbackCell

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

Formats the value using the given formatter.

impl Default for CallbackCell

fn default() -> Self

Returns the “default value” for a type.

impl Drop for CallbackCell

fn drop(&mut self)

Executes the destructor for this type.