Struct AsyncStd

pub struct AsyncStd;

Available on crate feature async_std only.

An executor that spawns tasks on async-std. In contrast to the other executors, this one is not self contained, because async-std does not provide an API that allows that, so the threadpool is global.

It works on Wasm.

Implementations

impl AsyncStd

pub fn new() -> Self

Create a new AsyncStd wrapper.

pub fn block_on<F: Future>(future: F) -> F::Output

Available on non-target_os="unknown" only.

Wrapper around async_std::task::block_on. This is not available on Wasm as Wasm does not have threads and you’re not allowed to block the only thread you have.

Trait Implementations

impl Clone for AsyncStd

fn clone(&self) -> AsyncStd

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AsyncStd

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

Formats the value using the given formatter.

impl Default for AsyncStd

fn default() -> AsyncStd

Returns the “default value” for a type.

impl LocalSpawn for AsyncStd

fn spawn_local_obj( &self, future: LocalFutureObj<'static, ()>, ) -> Result<(), SpawnError>

Spawns a future that will be run to completion.

fn status_local(&self) -> Result<(), SpawnError>

Determines whether the executor is able to spawn new tasks.

impl<Out: 'static> LocalSpawnHandle<Out> for AsyncStd

fn spawn_handle_local_obj( &self, future: LocalFutureObj<'static, Out>, ) -> Result<JoinHandle<Out>, SpawnError>

Spawn a future and return a JoinHandle that can be awaited for the output of the future.

impl Spawn for AsyncStd

fn spawn_obj(&self, future: FutureObj<'static, ()>) -> Result<(), SpawnError>

Spawns a future that will be run to completion.

fn status(&self) -> Result<(), SpawnError>

Determines whether the executor is able to spawn new tasks.

impl<R: Send + 'static> SpawnBlocking<R> for AsyncStd

fn spawn_blocking<F>(&self, f: F) -> BlockingHandle<R>

where F: FnOnce() -> R + Send + 'static,

Runs the provided closure on a thread where blocking is acceptable.

fn spawn_blocking_dyn( &self, f: Box<dyn FnOnce() -> R + Send>, ) -> BlockingHandle<R>

Runs the provided closure on a thread where blocking is acceptable. This part of the trait is object safe but your closure must be boxed and you cannot have a return value.

impl<Out: 'static + Send> SpawnHandle<Out> for AsyncStd

fn spawn_handle_obj( &self, future: FutureObj<'static, Out>, ) -> Result<JoinHandle<Out>, SpawnError>

Spawn a future and return a JoinHandle that can be awaited for the output of the future.

impl Timer for AsyncStd

fn sleep(&self, dur: Duration) -> BoxFuture<'static, ()>

Future that resolves after a given duration.

impl YieldNow for AsyncStd

fn yield_now(&self) -> YieldNowFut

Await this future in order to yield to the executor.

impl Copy for AsyncStd

impl TokioIo for AsyncStd

Available on non-WebAssembly and crate feature async_std_tokio only.

Signal io can be used on this executor.