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libasync/smoltcp/mod: prevent duplicated wakers

This commit is contained in:
pca006132 2020-08-24 15:25:03 +08:00
parent c13ca614ef
commit 39f672dde8
1 changed files with 11 additions and 4 deletions
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11
libasync/src/smoltcp/mod.rs
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@ -81,7 +81,14 @@ impl Sockets {
/// TODO: this was called through eg. TcpStream, another poll()
/// might want to send packets before sleeping for an interrupt.
pub(crate) fn register_waker(waker: Waker) {
Self::instance().wakers.borrow_mut()
.push(waker);
let mut wakers = Self::instance().wakers.borrow_mut();
for (i, w) in wakers.iter().enumerate() {
if w.will_wake(&waker) {
let last = wakers.len() - 1;
wakers.swap(i, last);
return;
}
}
wakers.push(waker);
}
}