Struct crossbeam_deque::Stealer[][src]

pub struct Stealer<T> { /* fields omitted */ }
Expand description

A stealer handle of a worker queue.

Stealers can be shared among threads.

Task schedulers typically have a single worker queue per worker thread.

Examples

use crossbeam_deque::{Steal, Worker};

let w = Worker::new_lifo();
w.push(1);
w.push(2);

let s = w.stealer();
assert_eq!(s.steal(), Steal::Success(1));
assert_eq!(s.steal(), Steal::Success(2));
assert_eq!(s.steal(), Steal::Empty);

Implementations

Returns true if the queue is empty.

use crossbeam_deque::Worker;

let w = Worker::new_lifo();
let s = w.stealer();

assert!(s.is_empty());
w.push(1);
assert!(!s.is_empty());

Steals a task from the queue.

Examples

use crossbeam_deque::{Steal, Worker};

let w = Worker::new_lifo();
w.push(1);
w.push(2);

let s = w.stealer();
assert_eq!(s.steal(), Steal::Success(1));
assert_eq!(s.steal(), Steal::Success(2));

Steals a batch of tasks and pushes them into another worker.

How many tasks exactly will be stolen is not specified. That said, this method will try to steal around half of the tasks in the queue, but also not more than some constant limit.

Examples

use crossbeam_deque::Worker;

let w1 = Worker::new_fifo();
w1.push(1);
w1.push(2);
w1.push(3);
w1.push(4);

let s = w1.stealer();
let w2 = Worker::new_fifo();

s.steal_batch(&w2);
assert_eq!(w2.pop(), Some(1));
assert_eq!(w2.pop(), Some(2));

Steals a batch of tasks, pushes them into another worker, and pops a task from that worker.

How many tasks exactly will be stolen is not specified. That said, this method will try to steal around half of the tasks in the queue, but also not more than some constant limit.

Examples

use crossbeam_deque::{Steal, Worker};

let w1 = Worker::new_fifo();
w1.push(1);
w1.push(2);
w1.push(3);
w1.push(4);

let s = w1.stealer();
let w2 = Worker::new_fifo();

assert_eq!(s.steal_batch_and_pop(&w2), Steal::Success(1));
assert_eq!(w2.pop(), Some(2));

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Auto Trait Implementations

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The type returned in the event of a conversion error.

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The type returned in the event of a conversion error.

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