[][src]Struct futures::executor::LocalPool

pub struct LocalPool { /* fields omitted */ }

A single-threaded task pool for polling futures to completion.

This executor allows you to multiplex any number of tasks onto a single thread. It's appropriate to poll strictly I/O-bound futures that do very little work in between I/O actions.

To get a handle to the pool that implements Spawn, use the spawner() method. Because the executor is single-threaded, it supports a special form of task spawning for non-Send futures, via spawn_local_obj.

Methods

impl LocalPool
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Create a new, empty pool of tasks.

Get a clonable handle to the pool as a [Spawn].

Run all tasks in the pool to completion.

The given spawner, spawn, is used as the default spawner for any newly-spawned tasks. You can route these additional tasks back into the LocalPool by using its spawner handle:

use futures::executor::LocalPool;

let mut pool = LocalPool::new();
let mut spawn = pool.spawner();

// ... spawn some initial tasks using `spawn.spawn()` or `spawn.spawn_local()`

// run *all* tasks in the pool to completion, including any newly-spawned ones.
pool.run(&mut spawn);

The function will block the calling thread until all tasks in the pool are complete, including any spawned while running existing tasks.

Runs all the tasks in the pool until the given future completes.

The given spawner, spawn, is used as the default spawner for any newly-spawned tasks. You can route these additional tasks back into the LocalPool by using its spawner handle:

#![feature(pin, arbitrary_self_types, futures_api)]
use futures::executor::LocalPool;
use futures::future::ready;

let mut pool = LocalPool::new();
let mut spawn = pool.spawner();

// run tasks in the pool until `my_app` completes, by default spawning
// further tasks back onto the pool
pool.run_until(my_app, &mut spawn);

The function will block the calling thread only until the future f completes; there may still be incomplete tasks in the pool, which will be inert after the call completes, but can continue with further use of run or run_until. While the function is running, however, all tasks in the pool will try to make progress.

Trait Implementations

impl Debug for LocalPool
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Formats the value using the given formatter. Read more

impl Default for LocalPool
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Returns the "default value" for a type. Read more

Auto Trait Implementations

impl !Send for LocalPool

impl !Sync for LocalPool

Blanket Implementations

impl<T> From for T
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut I

Immutably borrows from an owned value. Read more

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut I

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more