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pub use self::pipe::Awakener;
mod pipe {
use sys::unix;
use {io, Ready, Poll, PollOpt, Token};
use event::Evented;
use std::io::{Read, Write};
pub struct Awakener {
reader: unix::Io,
writer: unix::Io,
}
impl Awakener {
pub fn new() -> io::Result<Awakener> {
let (rd, wr) = unix::pipe()?;
Ok(Awakener {
reader: rd,
writer: wr,
})
}
pub fn wakeup(&self) -> io::Result<()> {
match (&self.writer).write(&[1]) {
Ok(_) => Ok(()),
Err(e) => {
if e.kind() == io::ErrorKind::WouldBlock {
Ok(())
} else {
Err(e)
}
}
}
}
pub fn cleanup(&self) {
let mut buf = [0; 128];
loop {
match (&self.reader).read(&mut buf) {
Ok(i) if i > 0 => {},
_ => return,
}
}
}
fn reader(&self) -> &unix::Io {
&self.reader
}
}
impl Evented for Awakener {
fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
self.reader().register(poll, token, interest, opts)
}
fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
self.reader().reregister(poll, token, interest, opts)
}
fn deregister(&self, poll: &Poll) -> io::Result<()> {
self.reader().deregister(poll)
}
}
}