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Add comments about two polling loops

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Ruihan Li 2024-08-23 16:30:03 +08:00 committed by Tate, Hongliang Tian
parent 42f70fd779
commit 2d6da11d92
1 changed files with 9 additions and 0 deletions
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9
kernel/aster-nix/src/net/iface/common.rs
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@ -163,10 +163,18 @@ impl IfaceCommon {
let (has_events, poll_at) = {
let mut has_events = false;
let mut poll_at;
loop {
// `poll` transmits and receives a bounded number of packets. This loop ensures
// that all packets are transmitted and received. For details, see
// <https://github.com/smoltcp-rs/smoltcp/blob/8e3ea5c7f09a76f0a4988fda20cadc74eacdc0d8/src/iface/interface/mod.rs#L400-L405>.
while interface.poll(timestamp, device, &mut sockets) {
has_events = true;
}
// `poll_at` can return `Some(Instant::from_millis(0))`, which means `PollAt::Now`.
// For details, see
// <https://github.com/smoltcp-rs/smoltcp/blob/8e3ea5c7f09a76f0a4988fda20cadc74eacdc0d8/src/iface/interface/mod.rs#L478>.
poll_at = interface.poll_at(timestamp, &sockets);
let Some(instant) = poll_at else {
break;
@ -175,6 +183,7 @@ impl IfaceCommon {
break;
}
}
(has_events, poll_at)
};