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use tokio_executor::park::{Park, Unpark};
use std::error::Error;
use std::fmt;
use std::time::Duration;
use crossbeam_utils::sync::{Parker, Unparker};
#[derive(Debug)]
pub struct DefaultPark {
inner: Parker,
}
#[derive(Debug)]
pub struct DefaultUnpark {
inner: Unparker,
}
#[derive(Debug)]
pub struct ParkError {
_p: (),
}
impl DefaultPark {
pub fn new() -> DefaultPark {
DefaultPark {
inner: Parker::new(),
}
}
pub(crate) fn notify(&self) {
self.inner.unparker().unpark();
}
pub(crate) fn park_sync(&self, duration: Option<Duration>) {
match duration {
None => self.inner.park(),
Some(duration) => self.inner.park_timeout(duration),
}
}
}
impl Park for DefaultPark {
type Unpark = DefaultUnpark;
type Error = ParkError;
fn unpark(&self) -> Self::Unpark {
DefaultUnpark {
inner: self.inner.unparker().clone(),
}
}
fn park(&mut self) -> Result<(), Self::Error> {
self.inner.park();
Ok(())
}
fn park_timeout(&mut self, duration: Duration) -> Result<(), Self::Error> {
self.inner.park_timeout(duration);
Ok(())
}
}
impl Unpark for DefaultUnpark {
fn unpark(&self) {
self.inner.unpark();
}
}
impl fmt::Display for ParkError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
self.description().fmt(fmt)
}
}
impl Error for ParkError {
fn description(&self) -> &str {
"unknown park error"
}
}