Enum parking_lot::OnceState

pub enum OnceState {
    New,
    Poisoned,
    InProgress,
    Done,
}

Current state of a Once.

Variants

New

A closure has not been executed yet

Poisoned

A closure was executed but panicked.

InProgress

A thread is currently executing a closure.

Done

A closure has completed sucessfully.

Methods

impl OnceState

fn poisoned(&self) -> bool

Returns whether the associated Once has been poisoned.

Once an initalization routine for a Once has panicked it will forever indicate to future forced initialization routines that it is poisoned.

fn done(&self) -> bool

Returns whether the associated Once has successfullly executed a closure.

Note that you generally need an Acquire barrier after checking this to ensure that operations are correctly ordered with regards to a concurrently executing closure.

Trait Implementations

impl Copy for OnceState

impl Clone for OnceState

fn clone(&self) -> OnceState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for OnceState

impl PartialEq for OnceState

fn eq(&self, __arg_0: &OnceState) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Debug for OnceState

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.