futures::executor

Struct ThreadPool

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pub struct ThreadPool { /* private fields */ }
Expand description

A general-purpose thread pool for scheduling tasks that poll futures to completion.

The thread pool multiplexes any number of tasks onto a fixed number of worker threads.

This type is a clonable handle to the threadpool itself. Cloning it will only create a new reference, not a new threadpool.

This type is only available when the thread-pool feature of this library is activated.

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impl ThreadPool

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pub fn new() -> Result<ThreadPool, Error>

Creates a new thread pool with the default configuration.

See documentation for the methods in ThreadPoolBuilder for details on the default configuration.

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pub fn builder() -> ThreadPoolBuilder

Create a default thread pool configuration, which can then be customized.

See documentation for the methods in ThreadPoolBuilder for details on the default configuration.

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pub fn spawn_obj_ok(&self, future: FutureObj<'static, ()>)

Spawns a future that will be run to completion.

Note: This method is similar to Spawn::spawn_obj, except that it is guaranteed to always succeed.

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pub fn spawn_ok<Fut>(&self, future: Fut)
where Fut: Future<Output = ()> + Send + 'static,

Spawns a task that polls the given future with output () to completion.

use futures::executor::ThreadPool;

let pool = ThreadPool::new().unwrap();

let future = async { /* ... */ };
pool.spawn_ok(future);

Note: This method is similar to SpawnExt::spawn, except that it is guaranteed to always succeed.

Trait Implementations§

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impl Clone for ThreadPool

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fn clone(&self) -> ThreadPool

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ThreadPool

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

Formats the value using the given formatter. Read more
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impl Drop for ThreadPool

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl Spawn for ThreadPool

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

Spawns a future that will be run to completion. Read more
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fn status(&self) -> Result<(), SpawnError>

Determines whether the executor is able to spawn new tasks. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<Sp> SpawnExt for Sp
where Sp: Spawn + ?Sized,

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fn spawn<Fut>(&self, future: Fut) -> Result<(), SpawnError>
where Fut: Future<Output = ()> + Send + 'static,

Spawns a task that polls the given future with output () to completion. Read more
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fn spawn_with_handle<Fut>( &self, future: Fut, ) -> Result<RemoteHandle<<Fut as Future>::Output>, SpawnError>
where Fut: Future + Send + 'static, <Fut as Future>::Output: Send,

Spawns a task that polls the given future to completion and returns a future that resolves to the spawned future’s output. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.