/
util.rs
47 lines (40 loc) · 1.12 KB
/
util.rs
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#![allow(dead_code)]
use futures::prelude::*;
use libp2p_core::muxing::StreamMuxer;
use std::{pin::Pin, task::Context, task::Poll};
pub struct CloseMuxer<M> {
state: CloseMuxerState<M>,
}
impl<M> CloseMuxer<M> {
pub fn new(m: M) -> CloseMuxer<M> {
CloseMuxer {
state: CloseMuxerState::Close(m),
}
}
}
pub enum CloseMuxerState<M> {
Close(M),
Done,
}
impl<M> Future for CloseMuxer<M>
where
M: StreamMuxer,
M::Error: From<std::io::Error>,
{
type Output = Result<M, M::Error>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
loop {
match std::mem::replace(&mut self.state, CloseMuxerState::Done) {
CloseMuxerState::Close(muxer) => {
if !muxer.poll_close(cx)?.is_ready() {
self.state = CloseMuxerState::Close(muxer);
return Poll::Pending;
}
return Poll::Ready(Ok(muxer));
}
CloseMuxerState::Done => panic!(),
}
}
}
}
impl<M> Unpin for CloseMuxer<M> {}