8000 Use a lock-free notifier queue by austinjones · Pull Request #6 · austinjones/postage-rs · GitHub
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Use a lock-free notifier queue #6

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Merged
merged 1 commit into from
Jan 18, 2021
Merged

Use a lock-free notifier queue #6

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13 changes: 6 additions & 7 deletions src/sync/notifier.rs
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Original file line number Diff line number Diff line change
@@ -1,23 +1,23 @@
use std::{collections::LinkedList, sync::Mutex, task::Waker};
use crossbeam_queue::SegQueue;
use std::task::Waker;

#[derive(Debug)]
pub struct Notifier {
wakers: Mutex<LinkedList<Waker>>,
wakers: SegQueue<Waker>,
}

impl Notifier {
pub fn new() -> Self {
Self {
wakers: Mutex::new(LinkedList::new()),
wakers: SegQueue::new(),
}
}

pub fn notify(&self) {
let mut wakers = self.wakers.lock().unwrap();
#[cfg(feature = "debug")]
let mut woken = 0usize;

while let Some(waker) = wakers.pop_back() {
while let Some(waker) = self.wakers.pop() {
#[cfg(feature = "debug")]
{
woken += 1;
Expand All @@ -33,7 +33,6 @@ impl Notifier {
}

pub fn subscribe(&self, waker: Waker) {
let mut wakers = self.wakers.lock().unwrap();
wakers.push_front(waker);
self.wakers.push(waker);
}
}
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