Struct Worker 

pub struct Worker { /* private fields */ }

Available on crate feature rayon only.

Per-thread state container for a WorkerPool.

Holds a type-erased Box<dyn Any> that can be initialized and accessed with concrete types via init and get.

Implementations

impl Worker

pub fn init<T: 'static>(&mut self, f: impl FnOnce(Option<&mut T>) -> T)

Initializes the worker state.

If state of type T already exists, passes Some(&mut T) to the closure so resources can be reused. On first init, passes None.

pub fn get<T: 'static>(&self) -> &T

Returns a reference to the state, downcasted to T.

Panics

Panics if the worker has not been initialized or if the type does not match.

pub fn get_mut<T: 'static>(&mut self) -> &mut T

Returns a mutable reference to the state, downcasted to T.

Panics

Panics if the worker has not been initialized or if the type does not match.

pub fn get_or_init<T: 'static>(&mut self, f: impl FnOnce() -> T) -> &mut T

Returns a mutable reference to the state, initializing it with f on first access.

Panics

Panics if the state was previously initialized with a different type.

pub fn clear(&mut self)

Clears the worker state, dropping the contained value.

Trait Implementations

impl Debug for Worker

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

Formats the value using the given formatter.

impl Default for Worker

fn default() -> Worker

Returns the “default value” for a type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes