Struct LocalQueue

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#[repr(C)]
pub struct LocalQueue<'l, T: Debug> { /* private fields */ }

Expand description

The work stealing local queue, exclusive to thread.

Implementations§

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impl<'l, T: Debug> LocalQueue<'l, T>

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pub fn is_empty(&self) -> bool

Returns true if the local queue is empty.

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pub fn is_full(&self) -> bool

Returns true if the local queue is full.

§Examples

use open_coroutine_queue::WorkStealQueue;

let queue = WorkStealQueue::new(1, 2);
let local = queue.local_queue();
assert!(local.is_empty());
for i in 0..2 {
    local.push_back(i);
}
assert!(local.is_full());
assert_eq!(local.pop_front(), Some(0));
assert_eq!(local.len(), 1);
assert_eq!(local.pop_front(), Some(1));
assert_eq!(local.pop_front(), None);
assert!(local.is_empty());

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pub fn len(&self) -> usize

Returns the number of elements in the queue.

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pub fn push_back(&self, item: T)

If the queue is full, first push half to global, then push the item to global.

§Examples

use open_coroutine_queue::WorkStealQueue;

let queue = WorkStealQueue::new(1, 2);
let local = queue.local_queue();
for i in 0..4 {
    local.push_back(i);
}
assert_eq!(local.pop_front(), Some(1));
assert_eq!(local.pop_front(), Some(3));
assert_eq!(local.pop_front(), Some(0));
assert_eq!(local.pop_front(), Some(2));
assert_eq!(local.pop_front(), None);

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pub fn pop_front(&self) -> Option<T>

If the queue is empty, first try steal from global, then try steal from siblings.

§Examples

use open_coroutine_queue::WorkStealQueue;

let queue = WorkStealQueue::new(1, 32);
for i in 0..4 {
    queue.push(i);
}
let local = queue.local_queue();
for i in 0..4 {
    assert_eq!(local.pop_front(), Some(i));
}
assert_eq!(local.pop_front(), None);
assert_eq!(queue.pop(), None);

§Examples

use open_coroutine_queue::WorkStealQueue;
let queue = WorkStealQueue::new(2, 64);
let local0 = queue.local_queue();
local0.push_back(2);
local0.push_back(3);
local0.push_back(4);
local0.push_back(5);
let local1 = queue.local_queue();
local1.push_back(0);
local1.push_back(1);
for i in 0..6 {
    assert_eq!(local1.pop_front(), Some(i));
}
assert_eq!(local0.pop_front(), None);
assert_eq!(local1.pop_front(), None);
assert_eq!(queue.pop(), None);