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libasync/smoltcp/mod: prevent duplicated wakers

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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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15
libasync/src/smoltcp/mod.rs
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@ -30,7 +30,7 @@ impl Sockets {
let sockets = RefCell::new(SocketSet::new(sockets_storage));
let wakers = RefCell::new(Vec::new());
let instance = Sockets {
sockets,
wakers,
@ -57,7 +57,7 @@ impl Sockets {
pub(crate) fn instance() -> &'static Self {
unsafe { SOCKETS.as_ref().expect("Sockets") }
}
fn poll<'b, 'c, 'e, D: for<'d> Device<'d>>(
&self,
iface: &mut EthernetInterface<'b, 'c, 'e, D>,
@ -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);
}
}