mirror of https://github.com/smol-rs/polling
2.3 KiB
2.3 KiB
polling
Portable interface to epoll, kqueue, and wepoll.
Supported platforms:
- epoll: Linux, Android, illumos
- kqueue: macOS, iOS, FreeBSD, NetBSD, OpenBSD, DragonFly BSD
- wepoll: Windows
Polling is done in oneshot mode, which means interest in I/O events needs to be reset after an event is delivered if we're interested in the next event of the same kind.
Only one thread can be waiting for I/O events at a time.
Examples
use polling::{Event, Poller};
use std::net::TcpListener;
// Create a TCP listener and put the socket in non-blocking mode.
let socket = TcpListener::bind("127.0.0.1:8000")?;
socket.set_nonblocking(true)?;
let key = 7; // arbitrary key identifying the socket
// Create a poller and register interest in readability on the socket.
let poller = Poller::new()?;
poller.insert(&socket)?;
poller.interest(&socket, Event::readable(key))?;
// The event loop.
let mut events = Vec::new();
loop {
// Wait for at least one I/O event.
events.clear();
poller.wait(&mut events, None)?;
for ev in &events {
if ev.key == key {
// Perform a non-blocking accept operation.
socket.accept()?;
// Set interest in the next readability event.
poller.interest(&socket, Event::readable(key))?;
}
}
}
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.