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Only push back entry if ready_events is not empty

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Jianfeng Jiang
2023-12-12 03:42:53 +00:00
committed by Tate, Hongliang Tian
parent 6ecb424dfc
commit 28d51a4496
1 changed files with 13 additions and 3 deletions
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16
services/libs/aster-std/src/fs/epoll/epoll_file.rs
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@ -243,11 +243,21 @@ impl EpollFile {
// If this entry's file is ready, save it in the output array.
// EPOLLHUP and EPOLLERR should always be reported.
let ready_events = entry.poll() & (ep_event.events | IoEvents::HUP | IoEvents::ERR);
if !ready_events.is_empty() {
ep_events.push(EpollEvent::new(ready_events, ep_event.user_data));
count_events += 1;
// If there are no events, the entry should be removed from the ready list.
if ready_events.is_empty() {
entry.reset_ready();
// For EPOLLONESHOT flag, this entry should also be removed from the interest list
if ep_flags.intersects(EpollFlags::ONE_SHOT) {
self.del_interest(entry.fd())
.expect("this entry should be in the interest list");
}
continue;
}
// Records the events from the ready list
ep_events.push(EpollEvent::new(ready_events, ep_event.user_data));
count_events += 1;
// If the epoll entry is neither edge-triggered or one-shot, then we should
// keep the entry in the ready list.
if !ep_flags.intersects(EpollFlags::ONE_SHOT | EpollFlags::EDGE_TRIGGER) {