Struct Once

pub struct Once { /* private fields */ }

A predicate used to execute a closure only once for the lifetime of an application.

Implementations

impl Once

pub const fn new() -> Once

Creates a new Once.

pub fn call_once<F>(&'static self, work: F)

where F: FnOnce(),

Executes a closure once, ensuring that no other closure has been or will be executed by self for the lifetype of the application.

If called simultaneously from multiple threads, waits synchronously

Trait Implementations

impl Debug for Once

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

Formats the value using the given formatter.

impl Sync for Once