Trait async_executors::iface::SpawnBlocking
source · [−]pub trait SpawnBlocking<R> where
R: Send + 'static, {
fn spawn_blocking<F>(&self, f: F) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T;
where
F: FnOnce() -> R + Send + 'static,
Self: Sized;
fn spawn_blocking_dyn(
&self,
f: Box<dyn FnOnce() -> R + Send>
) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T;;
}Expand description
Indicate the executor can provide a threadpool for blocking operations. There is two methods of this trait. One of them requires boxing the closure and the other is not object safe.
Required Methods
fn spawn_blocking<F>(&self, f: F) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T; where
F: FnOnce() -> R + Send + 'static,
Self: Sized,
fn spawn_blocking<F>(&self, f: F) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T; where
F: FnOnce() -> R + Send + 'static,
Self: Sized,
Runs the provided closure on a thread where blocking is acceptable.
fn spawn_blocking_dyn(
&self,
f: Box<dyn FnOnce() -> R + Send>
) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T;
fn spawn_blocking_dyn(
&self,
f: Box<dyn FnOnce() -> R + Send>
) -> BlockingHandle<R>ⓘNotable traits for BlockingHandle<T>impl<T: 'static> Future for BlockingHandle<T> type Output = T;
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.