mirror of
https://github.com/fafhrd91/actix-net
synced 2024-11-27 16:52:58 +01:00
Remove unused mods in actix-utils (#229)
This commit is contained in:
fakeshadow
GitHub
parent
4e4122b702
commit
43ce25cda1
@ -1,7 +1,10 @@
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# Changes
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## Unreleased - 2020-xx-xx
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* Upgrade `pin-project` to `1.0`.
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* Use `pin-project-lite` to replace `pin-project`. [#229]
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* Remove `condition`,`either`,`inflight`,`keepalive`,`oneshot`,`order`,`stream` and `time` mods. [#229]
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[#229]: https://github.com/actix/actix-net/pull/229
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## 2.0.0 - 2020-08-23
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* No changes from beta 1.
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@ -1,6 +1,6 @@
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[package]
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name = "actix-utils"
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version = "2.0.0"
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version = "3.0.0"
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authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
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description = "Various network related services and utilities for the Actix ecosystem."
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keywords = ["network", "framework", "async", "futures"]
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@ -19,12 +19,11 @@ path = "src/lib.rs"
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actix-codec = "0.3.0"
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actix-rt = "1.1.1"
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actix-service = "1.0.6"
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bitflags = "1.2.1"
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bytes = "0.5.3"
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either = "1.5.3"
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futures-channel = { version = "0.3.4", default-features = false }
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futures-sink = { version = "0.3.4", default-features = false }
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futures-util = { version = "0.3.4", default-features = false }
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futures-core = { version = "0.3.7", default-features = false }
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futures-sink = { version = "0.3.7", default-features = false }
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log = "0.4"
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pin-project = "1.0.0"
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slab = "0.4"
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pin-project-lite = "0.2.0"
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[dev-dependencies]
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futures-util = { version = "0.3.7", default-features = false }
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@ -1,129 +0,0 @@
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use std::cell::RefCell;
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use std::future::Future;
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use std::pin::Pin;
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use std::rc::Rc;
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use std::task::{Context, Poll};
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use slab::Slab;
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use crate::task::LocalWaker;
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/// Condition allows to notify multiple receivers at the same time
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pub struct Condition(Rc<RefCell<Inner>>);
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struct Inner {
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data: Slab<Option<LocalWaker>>,
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}
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impl Default for Condition {
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fn default() -> Self {
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Self::new()
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}
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}
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impl Condition {
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pub fn new() -> Condition {
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Condition(Rc::new(RefCell::new(Inner { data: Slab::new() })))
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}
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/// Get condition waiter
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pub fn wait(&mut self) -> Waiter {
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let token = self.0.borrow_mut().data.insert(None);
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Waiter {
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token,
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inner: self.0.clone(),
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}
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}
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/// Notify all waiters
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pub fn notify(&self) {
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let inner = self.0.borrow();
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for item in inner.data.iter() {
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if let Some(waker) = item.1 {
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waker.wake();
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}
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}
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}
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}
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impl Drop for Condition {
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fn drop(&mut self) {
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self.notify()
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}
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}
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#[must_use = "Waiter do nothing unless polled"]
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pub struct Waiter {
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token: usize,
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inner: Rc<RefCell<Inner>>,
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}
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impl Clone for Waiter {
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fn clone(&self) -> Self {
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let token = self.inner.borrow_mut().data.insert(None);
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Waiter {
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token,
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inner: self.inner.clone(),
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}
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}
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}
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impl Future for Waiter {
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type Output = ();
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let this = self.get_mut();
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let mut inner = this.inner.borrow_mut();
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let inner = unsafe { inner.data.get_unchecked_mut(this.token) };
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if inner.is_none() {
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let waker = LocalWaker::default();
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waker.register(cx.waker());
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*inner = Some(waker);
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Poll::Pending
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} else if inner.as_mut().unwrap().register(cx.waker()) {
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Poll::Pending
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} else {
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Poll::Ready(())
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}
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}
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}
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impl Drop for Waiter {
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fn drop(&mut self) {
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self.inner.borrow_mut().data.remove(self.token);
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use futures_util::future::lazy;
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#[actix_rt::test]
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async fn test_condition() {
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let mut cond = Condition::new();
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let mut waiter = cond.wait();
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assert_eq!(
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lazy(|cx| Pin::new(&mut waiter).poll(cx)).await,
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Poll::Pending
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);
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cond.notify();
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waiter.await;
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let mut waiter = cond.wait();
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assert_eq!(
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lazy(|cx| Pin::new(&mut waiter).poll(cx)).await,
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Poll::Pending
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);
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let mut waiter2 = waiter.clone();
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assert_eq!(
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lazy(|cx| Pin::new(&mut waiter2).poll(cx)).await,
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Poll::Pending
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);
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drop(cond);
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waiter.await;
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waiter2.await;
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}
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}
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@ -1,6 +1,7 @@
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use std::cell::Cell;
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use core::cell::Cell;
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use core::task;
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use std::rc::Rc;
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use std::task;
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use crate::task::LocalWaker;
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@ -2,13 +2,14 @@
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#![allow(type_alias_bounds)]
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use std::pin::Pin;
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use std::task::{Context, Poll};
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use std::{fmt, mem};
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use core::future::Future;
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use core::pin::Pin;
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use core::task::{Context, Poll};
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use core::{fmt, mem};
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use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
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use actix_service::{IntoService, Service};
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use futures_util::{future::Future, stream::Stream, FutureExt};
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use futures_core::stream::Stream;
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use log::debug;
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use crate::mpsc;
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@ -61,25 +62,28 @@ pub enum Message<T> {
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Close,
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}
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/// Dispatcher is a future that reads frames from Framed object
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/// and passes them to the service.
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#[pin_project::pin_project]
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pub struct Dispatcher<S, T, U, I>
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where
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pin_project_lite::pin_project! {
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/// Dispatcher is a future that reads frames from Framed object
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/// and passes them to the service.
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pub struct Dispatcher<S, T, U, I>
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where
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S: Service<Request = <U as Decoder>::Item, Response = I>,
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S::Error: 'static,
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S::Future: 'static,
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T: AsyncRead + AsyncWrite,
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U: Encoder<I> + Decoder,
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T: AsyncRead,
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T: AsyncWrite,
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U: Encoder<I>,
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U: Decoder,
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I: 'static,
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<U as Encoder<I>>::Error: std::fmt::Debug,
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{
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<U as Encoder<I>>::Error: fmt::Debug,
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{
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service: S,
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state: State<S, U, I>,
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#[pin]
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framed: Framed<T, U>,
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rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
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tx: mpsc::Sender<Result<Message<I>, S::Error>>,
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}
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}
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enum State<S: Service, U: Encoder<I> + Decoder, I> {
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@ -114,8 +118,8 @@ where
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T: AsyncRead + AsyncWrite,
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U: Decoder + Encoder<I>,
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I: 'static,
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<U as Decoder>::Error: std::fmt::Debug,
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<U as Encoder<I>>::Error: std::fmt::Debug,
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<U as Decoder>::Error: fmt::Debug,
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<U as Encoder<I>>::Error: fmt::Debug,
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{
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pub fn new<F: IntoService<S>>(framed: Framed<T, U>, service: F) -> Self {
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let (tx, rx) = mpsc::channel();
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@ -178,7 +182,7 @@ where
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T: AsyncRead + AsyncWrite,
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U: Decoder + Encoder<I>,
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I: 'static,
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<U as Encoder<I>>::Error: std::fmt::Debug,
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<U as Encoder<I>>::Error: fmt::Debug,
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{
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loop {
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let this = self.as_mut().project();
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@ -198,9 +202,11 @@ where
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};
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let tx = this.tx.clone();
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actix_rt::spawn(this.service.call(item).map(move |item| {
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let fut = this.service.call(item);
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actix_rt::spawn(async move {
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let item = fut.await;
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let _ = tx.send(item.map(Message::Item));
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}));
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});
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}
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Poll::Pending => return false,
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Poll::Ready(Err(err)) => {
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@ -220,7 +226,7 @@ where
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T: AsyncRead + AsyncWrite,
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U: Decoder + Encoder<I>,
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I: 'static,
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<U as Encoder<I>>::Error: std::fmt::Debug,
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<U as Encoder<I>>::Error: fmt::Debug,
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{
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loop {
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let mut this = self.as_mut().project();
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@ -271,8 +277,8 @@ where
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T: AsyncRead + AsyncWrite,
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U: Decoder + Encoder<I>,
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I: 'static,
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<U as Encoder<I>>::Error: std::fmt::Debug,
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<U as Decoder>::Error: std::fmt::Debug,
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<U as Encoder<I>>::Error: fmt::Debug,
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<U as Decoder>::Error: fmt::Debug,
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{
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type Output = Result<(), DispatcherError<S::Error, U, I>>;
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@ -1,153 +0,0 @@
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//! Contains `Either` service and related types and functions.
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use std::pin::Pin;
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use std::task::{Context, Poll};
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use actix_service::{Service, ServiceFactory};
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use futures_util::{future, future::Future, ready};
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/// Combine two different service types into a single type.
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///
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/// Both services must be of the same request, response, and error types.
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/// `EitherService` is useful for handling conditional branching in service
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/// middleware to different inner service types.
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pub struct EitherService<A, B> {
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left: A,
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right: B,
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}
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impl<A: Clone, B: Clone> Clone for EitherService<A, B> {
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fn clone(&self) -> Self {
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EitherService {
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left: self.left.clone(),
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right: self.right.clone(),
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}
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}
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}
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impl<A, B> Service for EitherService<A, B>
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where
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A: Service,
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B: Service<Response = A::Response, Error = A::Error>,
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{
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type Request = either::Either<A::Request, B::Request>;
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type Response = A::Response;
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type Error = A::Error;
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type Future = future::Either<A::Future, B::Future>;
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fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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let left = self.left.poll_ready(cx)?;
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let right = self.right.poll_ready(cx)?;
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if left.is_ready() && right.is_ready() {
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Poll::Ready(Ok(()))
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} else {
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Poll::Pending
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}
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}
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fn call(&mut self, req: either::Either<A::Request, B::Request>) -> Self::Future {
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match req {
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either::Either::Left(req) => future::Either::Left(self.left.call(req)),
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either::Either::Right(req) => future::Either::Right(self.right.call(req)),
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}
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}
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}
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/// Combine two different new service types into a single service.
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pub struct Either<A, B> {
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left: A,
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right: B,
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}
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impl<A, B> Either<A, B> {
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pub fn new(left: A, right: B) -> Either<A, B>
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where
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A: ServiceFactory,
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A::Config: Clone,
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B: ServiceFactory<
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Config = A::Config,
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Response = A::Response,
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Error = A::Error,
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InitError = A::InitError,
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>,
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{
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Either { left, right }
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}
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}
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impl<A, B> ServiceFactory for Either<A, B>
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where
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A: ServiceFactory,
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A::Config: Clone,
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B: ServiceFactory<
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Config = A::Config,
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Response = A::Response,
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Error = A::Error,
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InitError = A::InitError,
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>,
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{
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type Request = either::Either<A::Request, B::Request>;
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type Response = A::Response;
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type Error = A::Error;
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type InitError = A::InitError;
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type Config = A::Config;
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type Service = EitherService<A::Service, B::Service>;
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type Future = EitherNewService<A, B>;
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fn new_service(&self, cfg: A::Config) -> Self::Future {
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EitherNewService {
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left: None,
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right: None,
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left_fut: self.left.new_service(cfg.clone()),
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right_fut: self.right.new_service(cfg),
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}
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}
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}
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impl<A: Clone, B: Clone> Clone for Either<A, B> {
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fn clone(&self) -> Self {
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Self {
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left: self.left.clone(),
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right: self.right.clone(),
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}
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}
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}
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#[doc(hidden)]
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#[pin_project::pin_project]
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pub struct EitherNewService<A: ServiceFactory, B: ServiceFactory> {
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left: Option<A::Service>,
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right: Option<B::Service>,
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#[pin]
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left_fut: A::Future,
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#[pin]
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right_fut: B::Future,
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}
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impl<A, B> Future for EitherNewService<A, B>
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where
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A: ServiceFactory,
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B: ServiceFactory<Response = A::Response, Error = A::Error, InitError = A::InitError>,
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{
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type Output = Result<EitherService<A::Service, B::Service>, A::InitError>;
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let this = self.project();
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if this.left.is_none() {
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*this.left = Some(ready!(this.left_fut.poll(cx))?);
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}
|
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if this.right.is_none() {
|
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*this.right = Some(ready!(this.right_fut.poll(cx))?);
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}
|
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|
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if this.left.is_some() && this.right.is_some() {
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Poll::Ready(Ok(EitherService {
|
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left: this.left.take().unwrap(),
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right: this.right.take().unwrap(),
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}))
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} else {
|
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Poll::Pending
|
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}
|
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}
|
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}
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@ -1,169 +0,0 @@
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use std::convert::Infallible;
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use std::future::Future;
|
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use std::pin::Pin;
|
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use std::task::{Context, Poll};
|
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|
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use actix_service::{IntoService, Service, Transform};
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use futures_util::future::{ok, Ready};
|
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|
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use super::counter::{Counter, CounterGuard};
|
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|
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/// InFlight - new service for service that can limit number of in-flight
|
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/// async requests.
|
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///
|
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/// Default number of in-flight requests is 15
|
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pub struct InFlight {
|
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max_inflight: usize,
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}
|
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|
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impl InFlight {
|
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pub fn new(max: usize) -> Self {
|
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Self { max_inflight: max }
|
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}
|
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}
|
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|
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impl Default for InFlight {
|
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fn default() -> Self {
|
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Self::new(15)
|
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}
|
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}
|
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|
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impl<S> Transform<S> for InFlight
|
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where
|
||||
S: Service,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = S::Response;
|
||||
type Error = S::Error;
|
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type InitError = Infallible;
|
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type Transform = InFlightService<S>;
|
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type Future = Ready<Result<Self::Transform, Self::InitError>>;
|
||||
|
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fn new_transform(&self, service: S) -> Self::Future {
|
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ok(InFlightService::new(self.max_inflight, service))
|
||||
}
|
||||
}
|
||||
|
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pub struct InFlightService<S> {
|
||||
count: Counter,
|
||||
service: S,
|
||||
}
|
||||
|
||||
impl<S> InFlightService<S>
|
||||
where
|
||||
S: Service,
|
||||
{
|
||||
pub fn new<U>(max: usize, service: U) -> Self
|
||||
where
|
||||
U: IntoService<S>,
|
||||
{
|
||||
Self {
|
||||
count: Counter::new(max),
|
||||
service: service.into_service(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Service for InFlightService<T>
|
||||
where
|
||||
T: Service,
|
||||
{
|
||||
type Request = T::Request;
|
||||
type Response = T::Response;
|
||||
type Error = T::Error;
|
||||
type Future = InFlightServiceResponse<T>;
|
||||
|
||||
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
if self.service.poll_ready(cx)?.is_pending() {
|
||||
Poll::Pending
|
||||
} else if !self.count.available(cx) {
|
||||
log::trace!("InFlight limit exceeded");
|
||||
Poll::Pending
|
||||
} else {
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
}
|
||||
|
||||
fn call(&mut self, req: T::Request) -> Self::Future {
|
||||
InFlightServiceResponse {
|
||||
fut: self.service.call(req),
|
||||
_guard: self.count.get(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[doc(hidden)]
|
||||
#[pin_project::pin_project]
|
||||
pub struct InFlightServiceResponse<T: Service> {
|
||||
#[pin]
|
||||
fut: T::Future,
|
||||
_guard: CounterGuard,
|
||||
}
|
||||
|
||||
impl<T: Service> Future for InFlightServiceResponse<T> {
|
||||
type Output = Result<T::Response, T::Error>;
|
||||
|
||||
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
self.project().fut.poll(cx)
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
|
||||
use std::task::{Context, Poll};
|
||||
use std::time::Duration;
|
||||
|
||||
use super::*;
|
||||
use actix_service::{apply, fn_factory, Service, ServiceFactory};
|
||||
use futures_util::future::{lazy, ok, FutureExt, LocalBoxFuture};
|
||||
|
||||
struct SleepService(Duration);
|
||||
|
||||
impl Service for SleepService {
|
||||
type Request = ();
|
||||
type Response = ();
|
||||
type Error = ();
|
||||
type Future = LocalBoxFuture<'static, Result<(), ()>>;
|
||||
|
||||
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, _: ()) -> Self::Future {
|
||||
actix_rt::time::delay_for(self.0)
|
||||
.then(|_| ok::<_, ()>(()))
|
||||
.boxed_local()
|
||||
}
|
||||
}
|
||||
|
||||
#[actix_rt::test]
|
||||
async fn test_transform() {
|
||||
let wait_time = Duration::from_millis(50);
|
||||
|
||||
let mut srv = InFlightService::new(1, SleepService(wait_time));
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
|
||||
|
||||
let res = srv.call(());
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Pending);
|
||||
|
||||
let _ = res.await;
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
|
||||
}
|
||||
|
||||
#[actix_rt::test]
|
||||
async fn test_new_transform() {
|
||||
let wait_time = Duration::from_millis(50);
|
||||
|
||||
let srv = apply(InFlight::new(1), fn_factory(|| ok(SleepService(wait_time))));
|
||||
|
||||
let mut srv = srv.new_service(&()).await.unwrap();
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
|
||||
|
||||
let res = srv.call(());
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Pending);
|
||||
|
||||
let _ = res.await;
|
||||
assert_eq!(lazy(|cx| srv.poll_ready(cx)).await, Poll::Ready(Ok(())));
|
||||
}
|
||||
}
|
||||
@ -1,125 +0,0 @@
|
||||
use std::convert::Infallible;
|
||||
use std::future::Future;
|
||||
use std::marker::PhantomData;
|
||||
use std::pin::Pin;
|
||||
use std::task::{Context, Poll};
|
||||
use std::time::Duration;
|
||||
|
||||
use actix_rt::time::{delay_until, Delay, Instant};
|
||||
use actix_service::{Service, ServiceFactory};
|
||||
use futures_util::future::{ok, Ready};
|
||||
|
||||
use super::time::{LowResTime, LowResTimeService};
|
||||
|
||||
pub struct KeepAlive<R, E, F> {
|
||||
f: F,
|
||||
ka: Duration,
|
||||
time: LowResTime,
|
||||
_t: PhantomData<(R, E)>,
|
||||
}
|
||||
|
||||
impl<R, E, F> KeepAlive<R, E, F>
|
||||
where
|
||||
F: Fn() -> E + Clone,
|
||||
{
|
||||
pub fn new(ka: Duration, time: LowResTime, f: F) -> Self {
|
||||
KeepAlive {
|
||||
f,
|
||||
ka,
|
||||
time,
|
||||
_t: PhantomData,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<R, E, F> Clone for KeepAlive<R, E, F>
|
||||
where
|
||||
F: Clone,
|
||||
{
|
||||
fn clone(&self) -> Self {
|
||||
KeepAlive {
|
||||
f: self.f.clone(),
|
||||
ka: self.ka,
|
||||
time: self.time.clone(),
|
||||
_t: PhantomData,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<R, E, F> ServiceFactory for KeepAlive<R, E, F>
|
||||
where
|
||||
F: Fn() -> E + Clone,
|
||||
{
|
||||
type Request = R;
|
||||
type Response = R;
|
||||
type Error = E;
|
||||
type InitError = Infallible;
|
||||
type Config = ();
|
||||
type Service = KeepAliveService<R, E, F>;
|
||||
type Future = Ready<Result<Self::Service, Self::InitError>>;
|
||||
|
||||
fn new_service(&self, _: ()) -> Self::Future {
|
||||
ok(KeepAliveService::new(
|
||||
self.ka,
|
||||
self.time.timer(),
|
||||
self.f.clone(),
|
||||
))
|
||||
}
|
||||
}
|
||||
|
||||
pub struct KeepAliveService<R, E, F> {
|
||||
f: F,
|
||||
ka: Duration,
|
||||
time: LowResTimeService,
|
||||
delay: Delay,
|
||||
expire: Instant,
|
||||
_t: PhantomData<(R, E)>,
|
||||
}
|
||||
|
||||
impl<R, E, F> KeepAliveService<R, E, F>
|
||||
where
|
||||
F: Fn() -> E,
|
||||
{
|
||||
pub fn new(ka: Duration, time: LowResTimeService, f: F) -> Self {
|
||||
let expire = Instant::from_std(time.now() + ka);
|
||||
KeepAliveService {
|
||||
f,
|
||||
ka,
|
||||
time,
|
||||
expire,
|
||||
delay: delay_until(expire),
|
||||
_t: PhantomData,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<R, E, F> Service for KeepAliveService<R, E, F>
|
||||
where
|
||||
F: Fn() -> E,
|
||||
{
|
||||
type Request = R;
|
||||
type Response = R;
|
||||
type Error = E;
|
||||
type Future = Ready<Result<R, E>>;
|
||||
|
||||
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
match Pin::new(&mut self.delay).poll(cx) {
|
||||
Poll::Ready(_) => {
|
||||
let now = Instant::from_std(self.time.now());
|
||||
if self.expire <= now {
|
||||
Poll::Ready(Err((self.f)()))
|
||||
} else {
|
||||
self.delay.reset(self.expire);
|
||||
let _ = Pin::new(&mut self.delay).poll(cx);
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
}
|
||||
Poll::Pending => Poll::Ready(Ok(())),
|
||||
}
|
||||
}
|
||||
|
||||
fn call(&mut self, req: R) -> Self::Future {
|
||||
self.expire = Instant::from_std(self.time.now() + self.ka);
|
||||
ok(req)
|
||||
}
|
||||
}
|
||||
@ -5,16 +5,8 @@
|
||||
#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
|
||||
#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
|
||||
|
||||
pub mod condition;
|
||||
pub mod counter;
|
||||
pub mod dispatcher;
|
||||
pub mod either;
|
||||
pub mod inflight;
|
||||
pub mod keepalive;
|
||||
pub mod mpsc;
|
||||
pub mod oneshot;
|
||||
pub mod order;
|
||||
pub mod stream;
|
||||
pub mod task;
|
||||
pub mod time;
|
||||
pub mod timeout;
|
||||
|
||||
@ -1,15 +1,16 @@
|
||||
//! A multi-producer, single-consumer, futures-aware, FIFO queue.
|
||||
use std::any::Any;
|
||||
use std::cell::RefCell;
|
||||
use core::any::Any;
|
||||
use core::cell::RefCell;
|
||||
use core::fmt;
|
||||
use core::pin::Pin;
|
||||
use core::task::{Context, Poll};
|
||||
|
||||
use std::collections::VecDeque;
|
||||
use std::error::Error;
|
||||
use std::fmt;
|
||||
use std::pin::Pin;
|
||||
use std::rc::Rc;
|
||||
use std::task::{Context, Poll};
|
||||
|
||||
use futures_core::stream::Stream;
|
||||
use futures_sink::Sink;
|
||||
use futures_util::stream::Stream;
|
||||
|
||||
use crate::task::LocalWaker;
|
||||
|
||||
|
||||
@ -1,316 +0,0 @@
|
||||
//! A one-shot, futures-aware channel.
|
||||
use std::cell::RefCell;
|
||||
use std::future::Future;
|
||||
use std::pin::Pin;
|
||||
use std::rc::Rc;
|
||||
use std::task::{Context, Poll};
|
||||
|
||||
pub use futures_channel::oneshot::Canceled;
|
||||
use slab::Slab;
|
||||
|
||||
use crate::task::LocalWaker;
|
||||
|
||||
/// Creates a new futures-aware, one-shot channel.
|
||||
pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
|
||||
let inner = Rc::new(RefCell::new(Inner {
|
||||
value: None,
|
||||
rx_task: LocalWaker::new(),
|
||||
}));
|
||||
let tx = Sender {
|
||||
inner: inner.clone(),
|
||||
};
|
||||
let rx = Receiver { inner };
|
||||
(tx, rx)
|
||||
}
|
||||
|
||||
/// Creates a new futures-aware, pool of one-shot's.
|
||||
pub fn pool<T>() -> Pool<T> {
|
||||
Pool(Rc::new(RefCell::new(Slab::new())))
|
||||
}
|
||||
|
||||
/// Represents the completion half of a oneshot through which the result of a
|
||||
/// computation is signaled.
|
||||
#[derive(Debug)]
|
||||
pub struct Sender<T> {
|
||||
inner: Rc<RefCell<Inner<T>>>,
|
||||
}
|
||||
|
||||
/// A future representing the completion of a computation happening elsewhere in
|
||||
/// memory.
|
||||
#[derive(Debug)]
|
||||
#[must_use = "futures do nothing unless polled"]
|
||||
pub struct Receiver<T> {
|
||||
inner: Rc<RefCell<Inner<T>>>,
|
||||
}
|
||||
|
||||
// The channels do not ever project Pin to the inner T
|
||||
impl<T> Unpin for Receiver<T> {}
|
||||
impl<T> Unpin for Sender<T> {}
|
||||
|
||||
#[derive(Debug)]
|
||||
struct Inner<T> {
|
||||
value: Option<T>,
|
||||
rx_task: LocalWaker,
|
||||
}
|
||||
|
||||
impl<T> Sender<T> {
|
||||
/// Completes this oneshot with a successful result.
|
||||
///
|
||||
/// This function will consume `self` and indicate to the other end, the
|
||||
/// `Receiver`, that the error provided is the result of the computation this
|
||||
/// represents.
|
||||
///
|
||||
/// If the value is successfully enqueued for the remote end to receive,
|
||||
/// then `Ok(())` is returned. If the receiving end was dropped before
|
||||
/// this function was called, however, then `Err` is returned with the value
|
||||
/// provided.
|
||||
pub fn send(self, val: T) -> Result<(), T> {
|
||||
if Rc::strong_count(&self.inner) == 2 {
|
||||
let mut inner = self.inner.borrow_mut();
|
||||
inner.value = Some(val);
|
||||
inner.rx_task.wake();
|
||||
Ok(())
|
||||
} else {
|
||||
Err(val)
|
||||
}
|
||||
}
|
||||
|
||||
/// Tests to see whether this `Sender`'s corresponding `Receiver`
|
||||
/// has gone away.
|
||||
pub fn is_canceled(&self) -> bool {
|
||||
Rc::strong_count(&self.inner) == 1
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Drop for Sender<T> {
|
||||
fn drop(&mut self) {
|
||||
self.inner.borrow().rx_task.wake();
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Future for Receiver<T> {
|
||||
type Output = Result<T, Canceled>;
|
||||
|
||||
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
let this = self.get_mut();
|
||||
|
||||
// If we've got a value, then skip the logic below as we're done.
|
||||
if let Some(val) = this.inner.borrow_mut().value.take() {
|
||||
return Poll::Ready(Ok(val));
|
||||
}
|
||||
|
||||
// Check if sender is dropped and return error if it is.
|
||||
if Rc::strong_count(&this.inner) == 1 {
|
||||
Poll::Ready(Err(Canceled))
|
||||
} else {
|
||||
this.inner.borrow().rx_task.register(cx.waker());
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Futures-aware, pool of one-shot's.
|
||||
pub struct Pool<T>(Rc<RefCell<Slab<PoolInner<T>>>>);
|
||||
|
||||
bitflags::bitflags! {
|
||||
pub struct Flags: u8 {
|
||||
const SENDER = 0b0000_0001;
|
||||
const RECEIVER = 0b0000_0010;
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
struct PoolInner<T> {
|
||||
flags: Flags,
|
||||
value: Option<T>,
|
||||
waker: LocalWaker,
|
||||
}
|
||||
|
||||
impl<T> Pool<T> {
|
||||
pub fn channel(&mut self) -> (PSender<T>, PReceiver<T>) {
|
||||
let token = self.0.borrow_mut().insert(PoolInner {
|
||||
flags: Flags::all(),
|
||||
value: None,
|
||||
waker: LocalWaker::default(),
|
||||
});
|
||||
|
||||
(
|
||||
PSender {
|
||||
token,
|
||||
inner: self.0.clone(),
|
||||
},
|
||||
PReceiver {
|
||||
token,
|
||||
inner: self.0.clone(),
|
||||
},
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Clone for Pool<T> {
|
||||
fn clone(&self) -> Self {
|
||||
Pool(self.0.clone())
|
||||
}
|
||||
}
|
||||
|
||||
/// Represents the completion half of a oneshot through which the result of a
|
||||
/// computation is signaled.
|
||||
#[derive(Debug)]
|
||||
pub struct PSender<T> {
|
||||
token: usize,
|
||||
inner: Rc<RefCell<Slab<PoolInner<T>>>>,
|
||||
}
|
||||
|
||||
/// A future representing the completion of a computation happening elsewhere in
|
||||
/// memory.
|
||||
#[derive(Debug)]
|
||||
#[must_use = "futures do nothing unless polled"]
|
||||
pub struct PReceiver<T> {
|
||||
token: usize,
|
||||
inner: Rc<RefCell<Slab<PoolInner<T>>>>,
|
||||
}
|
||||
|
||||
// The one-shots do not ever project Pin to the inner T
|
||||
impl<T> Unpin for PReceiver<T> {}
|
||||
impl<T> Unpin for PSender<T> {}
|
||||
|
||||
impl<T> PSender<T> {
|
||||
/// Completes this oneshot with a successful result.
|
||||
///
|
||||
/// This function will consume `self` and indicate to the other end, the
|
||||
/// `Receiver`, that the error provided is the result of the computation this
|
||||
/// represents.
|
||||
///
|
||||
/// If the value is successfully enqueued for the remote end to receive,
|
||||
/// then `Ok(())` is returned. If the receiving end was dropped before
|
||||
/// this function was called, however, then `Err` is returned with the value
|
||||
/// provided.
|
||||
pub fn send(self, val: T) -> Result<(), T> {
|
||||
let mut inner = self.inner.borrow_mut();
|
||||
let inner = unsafe { inner.get_unchecked_mut(self.token) };
|
||||
|
||||
if inner.flags.contains(Flags::RECEIVER) {
|
||||
inner.value = Some(val);
|
||||
inner.waker.wake();
|
||||
Ok(())
|
||||
} else {
|
||||
Err(val)
|
||||
}
|
||||
}
|
||||
|
||||
/// Tests to see whether this `Sender`'s corresponding `Receiver`
|
||||
/// has gone away.
|
||||
pub fn is_canceled(&self) -> bool {
|
||||
!unsafe { self.inner.borrow().get_unchecked(self.token) }
|
||||
.flags
|
||||
.contains(Flags::RECEIVER)
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Drop for PSender<T> {
|
||||
fn drop(&mut self) {
|
||||
let mut inner = self.inner.borrow_mut();
|
||||
let inner_token = unsafe { inner.get_unchecked_mut(self.token) };
|
||||
if inner_token.flags.contains(Flags::RECEIVER) {
|
||||
inner_token.waker.wake();
|
||||
inner_token.flags.remove(Flags::SENDER);
|
||||
} else {
|
||||
inner.remove(self.token);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Drop for PReceiver<T> {
|
||||
fn drop(&mut self) {
|
||||
let mut inner = self.inner.borrow_mut();
|
||||
let inner_token = unsafe { inner.get_unchecked_mut(self.token) };
|
||||
if inner_token.flags.contains(Flags::SENDER) {
|
||||
inner_token.flags.remove(Flags::RECEIVER);
|
||||
} else {
|
||||
inner.remove(self.token);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Future for PReceiver<T> {
|
||||
type Output = Result<T, Canceled>;
|
||||
|
||||
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
let this = self.get_mut();
|
||||
let mut inner = this.inner.borrow_mut();
|
||||
let inner = unsafe { inner.get_unchecked_mut(this.token) };
|
||||
|
||||
// If we've got a value, then skip the logic below as we're done.
|
||||
if let Some(val) = inner.value.take() {
|
||||
return Poll::Ready(Ok(val));
|
||||
}
|
||||
|
||||
// Check if sender is dropped and return error if it is.
|
||||
if !inner.flags.contains(Flags::SENDER) {
|
||||
Poll::Ready(Err(Canceled))
|
||||
} else {
|
||||
inner.waker.register(cx.waker());
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use futures_util::future::lazy;
|
||||
|
||||
#[actix_rt::test]
|
||||
async fn test_oneshot() {
|
||||
let (tx, rx) = channel();
|
||||
tx.send("test").unwrap();
|
||||
assert_eq!(rx.await.unwrap(), "test");
|
||||
|
||||
let (tx, rx) = channel();
|
||||
assert!(!tx.is_canceled());
|
||||
drop(rx);
|
||||
assert!(tx.is_canceled());
|
||||
assert!(tx.send("test").is_err());
|
||||
|
||||
let (tx, rx) = channel::<&'static str>();
|
||||
drop(tx);
|
||||
assert!(rx.await.is_err());
|
||||
|
||||
let (tx, mut rx) = channel::<&'static str>();
|
||||
assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
|
||||
tx.send("test").unwrap();
|
||||
assert_eq!(rx.await.unwrap(), "test");
|
||||
|
||||
let (tx, mut rx) = channel::<&'static str>();
|
||||
assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
|
||||
drop(tx);
|
||||
assert!(rx.await.is_err());
|
||||
}
|
||||
|
||||
#[actix_rt::test]
|
||||
async fn test_pool() {
|
||||
let (tx, rx) = pool().channel();
|
||||
tx.send("test").unwrap();
|
||||
assert_eq!(rx.await.unwrap(), "test");
|
||||
|
||||
let (tx, rx) = pool().channel();
|
||||
assert!(!tx.is_canceled());
|
||||
drop(rx);
|
||||
assert!(tx.is_canceled());
|
||||
assert!(tx.send("test").is_err());
|
||||
|
||||
let (tx, rx) = pool::<&'static str>().channel();
|
||||
drop(tx);
|
||||
assert!(rx.await.is_err());
|
||||
|
||||
let (tx, mut rx) = pool::<&'static str>().channel();
|
||||
assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
|
||||
tx.send("test").unwrap();
|
||||
assert_eq!(rx.await.unwrap(), "test");
|
||||
|
||||
let (tx, mut rx) = pool::<&'static str>().channel();
|
||||
assert_eq!(lazy(|cx| Pin::new(&mut rx).poll(cx)).await, Poll::Pending);
|
||||
drop(tx);
|
||||
assert!(rx.await.is_err());
|
||||
}
|
||||
}
|
||||
@ -1,283 +0,0 @@
|
||||
use std::collections::VecDeque;
|
||||
use std::convert::Infallible;
|
||||
use std::fmt;
|
||||
use std::future::Future;
|
||||
use std::marker::PhantomData;
|
||||
use std::pin::Pin;
|
||||
use std::rc::Rc;
|
||||
use std::task::{Context, Poll};
|
||||
|
||||
use actix_service::{IntoService, Service, Transform};
|
||||
use futures_util::future::{ok, Ready};
|
||||
|
||||
use crate::oneshot;
|
||||
use crate::task::LocalWaker;
|
||||
|
||||
struct Record<I, E> {
|
||||
rx: oneshot::Receiver<Result<I, E>>,
|
||||
tx: oneshot::Sender<Result<I, E>>,
|
||||
}
|
||||
|
||||
/// Timeout error
|
||||
pub enum InOrderError<E> {
|
||||
/// Service error
|
||||
Service(E),
|
||||
/// Service call dropped
|
||||
Disconnected,
|
||||
}
|
||||
|
||||
impl<E> From<E> for InOrderError<E> {
|
||||
fn from(err: E) -> Self {
|
||||
InOrderError::Service(err)
|
||||
}
|
||||
}
|
||||
|
||||
impl<E: fmt::Debug> fmt::Debug for InOrderError<E> {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
match self {
|
||||
InOrderError::Service(e) => write!(f, "InOrderError::Service({:?})", e),
|
||||
InOrderError::Disconnected => write!(f, "InOrderError::Disconnected"),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<E: fmt::Display> fmt::Display for InOrderError<E> {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
match self {
|
||||
InOrderError::Service(e) => e.fmt(f),
|
||||
InOrderError::Disconnected => write!(f, "InOrder service disconnected"),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// InOrder - The service will yield responses as they become available,
|
||||
/// in the order that their originating requests were submitted to the service.
|
||||
pub struct InOrder<S> {
|
||||
_t: PhantomData<S>,
|
||||
}
|
||||
|
||||
impl<S> InOrder<S>
|
||||
where
|
||||
S: Service,
|
||||
S::Response: 'static,
|
||||
S::Future: 'static,
|
||||
S::Error: 'static,
|
||||
{
|
||||
pub fn new() -> Self {
|
||||
Self { _t: PhantomData }
|
||||
}
|
||||
|
||||
pub fn service(service: S) -> InOrderService<S> {
|
||||
InOrderService::new(service)
|
||||
}
|
||||
}
|
||||
|
||||
impl<S> Default for InOrder<S>
|
||||
where
|
||||
S: Service,
|
||||
S::Response: 'static,
|
||||
S::Future: 'static,
|
||||
S::Error: 'static,
|
||||
{
|
||||
fn default() -> Self {
|
||||
Self::new()
|
||||
}
|
||||
}
|
||||
|
||||
impl<S> Transform<S> for InOrder<S>
|
||||
where
|
||||
S: Service,
|
||||
S::Response: 'static,
|
||||
S::Future: 'static,
|
||||
S::Error: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = S::Response;
|
||||
type Error = InOrderError<S::Error>;
|
||||
type InitError = Infallible;
|
||||
type Transform = InOrderService<S>;
|
||||
type Future = Ready<Result<Self::Transform, Self::InitError>>;
|
||||
|
||||
fn new_transform(&self, service: S) -> Self::Future {
|
||||
ok(InOrderService::new(service))
|
||||
}
|
||||
}
|
||||
|
||||
pub struct InOrderService<S: Service> {
|
||||
service: S,
|
||||
waker: Rc<LocalWaker>,
|
||||
acks: VecDeque<Record<S::Response, S::Error>>,
|
||||
}
|
||||
|
||||
impl<S> InOrderService<S>
|
||||
where
|
||||
S: Service,
|
||||
S::Response: 'static,
|
||||
S::Future: 'static,
|
||||
S::Error: 'static,
|
||||
{
|
||||
pub fn new<U>(service: U) -> Self
|
||||
where
|
||||
U: IntoService<S>,
|
||||
{
|
||||
Self {
|
||||
service: service.into_service(),
|
||||
acks: VecDeque::new(),
|
||||
waker: Rc::new(LocalWaker::new()),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<S> Service for InOrderService<S>
|
||||
where
|
||||
S: Service,
|
||||
S::Response: 'static,
|
||||
S::Future: 'static,
|
||||
S::Error: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = S::Response;
|
||||
type Error = InOrderError<S::Error>;
|
||||
type Future = InOrderServiceResponse<S>;
|
||||
|
||||
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
// poll_ready could be called from different task
|
||||
self.waker.register(cx.waker());
|
||||
|
||||
// check acks
|
||||
while !self.acks.is_empty() {
|
||||
let rec = self.acks.front_mut().unwrap();
|
||||
match Pin::new(&mut rec.rx).poll(cx) {
|
||||
Poll::Ready(Ok(res)) => {
|
||||
let rec = self.acks.pop_front().unwrap();
|
||||
let _ = rec.tx.send(res);
|
||||
}
|
||||
Poll::Pending => break,
|
||||
Poll::Ready(Err(oneshot::Canceled)) => {
|
||||
return Poll::Ready(Err(InOrderError::Disconnected))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// check nested service
|
||||
if self
|
||||
.service
|
||||
.poll_ready(cx)
|
||||
.map_err(InOrderError::Service)?
|
||||
.is_pending()
|
||||
{
|
||||
Poll::Pending
|
||||
} else {
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
}
|
||||
|
||||
fn call(&mut self, request: S::Request) -> Self::Future {
|
||||
let (tx1, rx1) = oneshot::channel();
|
||||
let (tx2, rx2) = oneshot::channel();
|
||||
self.acks.push_back(Record { rx: rx1, tx: tx2 });
|
||||
|
||||
let waker = self.waker.clone();
|
||||
let fut = self.service.call(request);
|
||||
actix_rt::spawn(async move {
|
||||
let res = fut.await;
|
||||
waker.wake();
|
||||
let _ = tx1.send(res);
|
||||
});
|
||||
|
||||
InOrderServiceResponse { rx: rx2 }
|
||||
}
|
||||
}
|
||||
|
||||
#[doc(hidden)]
|
||||
pub struct InOrderServiceResponse<S: Service> {
|
||||
rx: oneshot::Receiver<Result<S::Response, S::Error>>,
|
||||
}
|
||||
|
||||
impl<S: Service> Future for InOrderServiceResponse<S> {
|
||||
type Output = Result<S::Response, InOrderError<S::Error>>;
|
||||
|
||||
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
match Pin::new(&mut self.rx).poll(cx) {
|
||||
Poll::Pending => Poll::Pending,
|
||||
Poll::Ready(Ok(Ok(res))) => Poll::Ready(Ok(res)),
|
||||
Poll::Ready(Ok(Err(e))) => Poll::Ready(Err(e.into())),
|
||||
Poll::Ready(Err(_)) => Poll::Ready(Err(InOrderError::Disconnected)),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
|
||||
use std::task::{Context, Poll};
|
||||
use std::time::Duration;
|
||||
|
||||
use super::*;
|
||||
use actix_service::Service;
|
||||
use futures_channel::oneshot;
|
||||
use futures_util::future::{lazy, poll_fn, FutureExt, LocalBoxFuture};
|
||||
|
||||
struct Srv;
|
||||
|
||||
impl Service for Srv {
|
||||
type Request = oneshot::Receiver<usize>;
|
||||
type Response = usize;
|
||||
type Error = ();
|
||||
type Future = LocalBoxFuture<'static, Result<usize, ()>>;
|
||||
|
||||
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, req: oneshot::Receiver<usize>) -> Self::Future {
|
||||
req.map(|res| res.map_err(|_| ())).boxed_local()
|
||||
}
|
||||
}
|
||||
|
||||
#[actix_rt::test]
|
||||
async fn test_in_order() {
|
||||
let (tx1, rx1) = oneshot::channel();
|
||||
let (tx2, rx2) = oneshot::channel();
|
||||
let (tx3, rx3) = oneshot::channel();
|
||||
let (tx_stop, rx_stop) = oneshot::channel();
|
||||
|
||||
let h = std::thread::spawn(move || {
|
||||
let rx1 = rx1;
|
||||
let rx2 = rx2;
|
||||
let rx3 = rx3;
|
||||
let tx_stop = tx_stop;
|
||||
actix_rt::System::new("test").block_on(async {
|
||||
let mut srv = InOrderService::new(Srv);
|
||||
|
||||
let _ = lazy(|cx| srv.poll_ready(cx)).await;
|
||||
let res1 = srv.call(rx1);
|
||||
let res2 = srv.call(rx2);
|
||||
let res3 = srv.call(rx3);
|
||||
|
||||
actix_rt::spawn(async move {
|
||||
poll_fn(|cx| {
|
||||
let _ = srv.poll_ready(cx);
|
||||
Poll::<()>::Pending
|
||||
})
|
||||
.await;
|
||||
});
|
||||
|
||||
assert_eq!(res1.await.unwrap(), 1);
|
||||
assert_eq!(res2.await.unwrap(), 2);
|
||||
assert_eq!(res3.await.unwrap(), 3);
|
||||
|
||||
let _ = tx_stop.send(());
|
||||
actix_rt::System::current().stop();
|
||||
});
|
||||
});
|
||||
|
||||
let _ = tx3.send(3);
|
||||
std::thread::sleep(Duration::from_millis(50));
|
||||
let _ = tx2.send(2);
|
||||
let _ = tx1.send(1);
|
||||
|
||||
let _ = rx_stop.await;
|
||||
let _ = h.join();
|
||||
}
|
||||
}
|
||||
@ -1,76 +0,0 @@
|
||||
use std::future::Future;
|
||||
use std::pin::Pin;
|
||||
use std::task::{Context, Poll};
|
||||
|
||||
use actix_service::{IntoService, Service};
|
||||
use futures_util::{stream::Stream, FutureExt};
|
||||
|
||||
use crate::mpsc;
|
||||
|
||||
#[pin_project::pin_project]
|
||||
pub struct Dispatcher<S, T>
|
||||
where
|
||||
S: Stream,
|
||||
T: Service<Request = S::Item, Response = ()> + 'static,
|
||||
{
|
||||
#[pin]
|
||||
stream: S,
|
||||
service: T,
|
||||
err_rx: mpsc::Receiver<T::Error>,
|
||||
err_tx: mpsc::Sender<T::Error>,
|
||||
}
|
||||
|
||||
impl<S, T> Dispatcher<S, T>
|
||||
where
|
||||
S: Stream,
|
||||
T: Service<Request = S::Item, Response = ()> + 'static,
|
||||
{
|
||||
pub fn new<F>(stream: S, service: F) -> Self
|
||||
where
|
||||
F: IntoService<T>,
|
||||
{
|
||||
let (err_tx, err_rx) = mpsc::channel();
|
||||
Dispatcher {
|
||||
err_rx,
|
||||
err_tx,
|
||||
stream,
|
||||
service: service.into_service(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<S, T> Future for Dispatcher<S, T>
|
||||
where
|
||||
S: Stream,
|
||||
T: Service<Request = S::Item, Response = ()> + 'static,
|
||||
{
|
||||
type Output = Result<(), T::Error>;
|
||||
|
||||
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
let mut this = self.as_mut().project();
|
||||
|
||||
if let Poll::Ready(Some(e)) = Pin::new(&mut this.err_rx).poll_next(cx) {
|
||||
return Poll::Ready(Err(e));
|
||||
}
|
||||
|
||||
loop {
|
||||
return match this.service.poll_ready(cx)? {
|
||||
Poll::Ready(_) => match this.stream.poll_next(cx) {
|
||||
Poll::Ready(Some(item)) => {
|
||||
let stop = this.err_tx.clone();
|
||||
actix_rt::spawn(this.service.call(item).map(move |res| {
|
||||
if let Err(e) = res {
|
||||
let _ = stop.send(e);
|
||||
}
|
||||
}));
|
||||
this = self.as_mut().project();
|
||||
continue;
|
||||
}
|
||||
Poll::Pending => Poll::Pending,
|
||||
Poll::Ready(None) => Poll::Ready(Ok(())),
|
||||
},
|
||||
Poll::Pending => Poll::Pending,
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,7 +1,7 @@
|
||||
use std::cell::UnsafeCell;
|
||||
use std::marker::PhantomData;
|
||||
use std::task::Waker;
|
||||
use std::{fmt, rc};
|
||||
use core::cell::UnsafeCell;
|
||||
use core::fmt;
|
||||
use core::marker::PhantomData;
|
||||
use core::task::Waker;
|
||||
|
||||
/// A synchronization primitive for task wakeup.
|
||||
///
|
||||
@ -23,7 +23,8 @@ use std::{fmt, rc};
|
||||
#[derive(Default)]
|
||||
pub struct LocalWaker {
|
||||
pub(crate) waker: UnsafeCell<Option<Waker>>,
|
||||
_t: PhantomData<rc::Rc<()>>,
|
||||
// mark LocalWaker as a !Send type.
|
||||
_t: PhantomData<*const ()>,
|
||||
}
|
||||
|
||||
impl LocalWaker {
|
||||
|
||||
@ -1,225 +0,0 @@
|
||||
use std::cell::RefCell;
|
||||
use std::convert::Infallible;
|
||||
use std::rc::Rc;
|
||||
use std::task::{Context, Poll};
|
||||
use std::time::{self, Duration, Instant};
|
||||
|
||||
use actix_rt::time::delay_for;
|
||||
use actix_service::{Service, ServiceFactory};
|
||||
use futures_util::future::{ok, ready, FutureExt, Ready};
|
||||
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct LowResTime(Rc<RefCell<Inner>>);
|
||||
|
||||
#[derive(Debug)]
|
||||
struct Inner {
|
||||
resolution: Duration,
|
||||
current: Option<Instant>,
|
||||
}
|
||||
|
||||
impl Inner {
|
||||
fn new(resolution: Duration) -> Self {
|
||||
Inner {
|
||||
resolution,
|
||||
current: None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl LowResTime {
|
||||
pub fn with(resolution: Duration) -> LowResTime {
|
||||
LowResTime(Rc::new(RefCell::new(Inner::new(resolution))))
|
||||
}
|
||||
|
||||
pub fn timer(&self) -> LowResTimeService {
|
||||
LowResTimeService(self.0.clone())
|
||||
}
|
||||
}
|
||||
|
||||
impl Default for LowResTime {
|
||||
fn default() -> Self {
|
||||
LowResTime(Rc::new(RefCell::new(Inner::new(Duration::from_secs(1)))))
|
||||
}
|
||||
}
|
||||
|
||||
impl ServiceFactory for LowResTime {
|
||||
type Request = ();
|
||||
type Response = Instant;
|
||||
type Error = Infallible;
|
||||
type InitError = Infallible;
|
||||
type Config = ();
|
||||
type Service = LowResTimeService;
|
||||
type Future = Ready<Result<Self::Service, Self::InitError>>;
|
||||
|
||||
fn new_service(&self, _: ()) -> Self::Future {
|
||||
ok(self.timer())
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct LowResTimeService(Rc<RefCell<Inner>>);
|
||||
|
||||
impl LowResTimeService {
|
||||
pub fn with(resolution: Duration) -> LowResTimeService {
|
||||
LowResTimeService(Rc::new(RefCell::new(Inner::new(resolution))))
|
||||
}
|
||||
|
||||
/// Get current time. This function has to be called from
|
||||
/// future's poll method, otherwise it panics.
|
||||
pub fn now(&self) -> Instant {
|
||||
let cur = self.0.borrow().current;
|
||||
if let Some(cur) = cur {
|
||||
cur
|
||||
} else {
|
||||
let now = Instant::now();
|
||||
let inner = self.0.clone();
|
||||
let interval = {
|
||||
let mut b = inner.borrow_mut();
|
||||
b.current = Some(now);
|
||||
b.resolution
|
||||
};
|
||||
|
||||
actix_rt::spawn(delay_for(interval).then(move |_| {
|
||||
inner.borrow_mut().current.take();
|
||||
ready(())
|
||||
}));
|
||||
now
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Service for LowResTimeService {
|
||||
type Request = ();
|
||||
type Response = Instant;
|
||||
type Error = Infallible;
|
||||
type Future = Ready<Result<Self::Response, Self::Error>>;
|
||||
|
||||
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
|
||||
Poll::Ready(Ok(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, _: ()) -> Self::Future {
|
||||
ok(self.now())
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct SystemTime(Rc<RefCell<SystemTimeInner>>);
|
||||
|
||||
#[derive(Debug)]
|
||||
struct SystemTimeInner {
|
||||
resolution: Duration,
|
||||
current: Option<time::SystemTime>,
|
||||
}
|
||||
|
||||
impl SystemTimeInner {
|
||||
fn new(resolution: Duration) -> Self {
|
||||
SystemTimeInner {
|
||||
resolution,
|
||||
current: None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct SystemTimeService(Rc<RefCell<SystemTimeInner>>);
|
||||
|
||||
impl SystemTimeService {
|
||||
pub fn with(resolution: Duration) -> SystemTimeService {
|
||||
SystemTimeService(Rc::new(RefCell::new(SystemTimeInner::new(resolution))))
|
||||
}
|
||||
|
||||
/// Get current time. This function has to be called from
|
||||
/// future's poll method, otherwise it panics.
|
||||
pub fn now(&self) -> time::SystemTime {
|
||||
let cur = self.0.borrow().current;
|
||||
if let Some(cur) = cur {
|
||||
cur
|
||||
} else {
|
||||
let now = time::SystemTime::now();
|
||||
let inner = self.0.clone();
|
||||
let interval = {
|
||||
let mut b = inner.borrow_mut();
|
||||
b.current = Some(now);
|
||||
b.resolution
|
||||
};
|
||||
|
||||
actix_rt::spawn(delay_for(interval).then(move |_| {
|
||||
inner.borrow_mut().current.take();
|
||||
ready(())
|
||||
}));
|
||||
now
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use std::time::{Duration, SystemTime};
|
||||
|
||||
/// State Under Test: Two calls of `SystemTimeService::now()` return the same value if they are done within resolution interval of `SystemTimeService`.
|
||||
///
|
||||
/// Expected Behavior: Two back-to-back calls of `SystemTimeService::now()` return the same value.
|
||||
#[actix_rt::test]
|
||||
async fn system_time_service_time_does_not_immediately_change() {
|
||||
let resolution = Duration::from_millis(50);
|
||||
|
||||
let time_service = SystemTimeService::with(resolution);
|
||||
assert_eq!(time_service.now(), time_service.now());
|
||||
}
|
||||
|
||||
/// State Under Test: Two calls of `LowResTimeService::now()` return the same value if they are done within resolution interval of `SystemTimeService`.
|
||||
///
|
||||
/// Expected Behavior: Two back-to-back calls of `LowResTimeService::now()` return the same value.
|
||||
#[actix_rt::test]
|
||||
async fn low_res_time_service_time_does_not_immediately_change() {
|
||||
let resolution = Duration::from_millis(50);
|
||||
let time_service = LowResTimeService::with(resolution);
|
||||
assert_eq!(time_service.now(), time_service.now());
|
||||
}
|
||||
|
||||
/// State Under Test: `SystemTimeService::now()` updates returned value every resolution period.
|
||||
///
|
||||
/// Expected Behavior: Two calls of `LowResTimeService::now()` made in subsequent resolution interval return different values
|
||||
/// and second value is greater than the first one at least by a resolution interval.
|
||||
#[actix_rt::test]
|
||||
async fn system_time_service_time_updates_after_resolution_interval() {
|
||||
let resolution = Duration::from_millis(100);
|
||||
let wait_time = Duration::from_millis(300);
|
||||
|
||||
let time_service = SystemTimeService::with(resolution);
|
||||
|
||||
let first_time = time_service
|
||||
.now()
|
||||
.duration_since(SystemTime::UNIX_EPOCH)
|
||||
.unwrap();
|
||||
|
||||
delay_for(wait_time).await;
|
||||
|
||||
let second_time = time_service
|
||||
.now()
|
||||
.duration_since(SystemTime::UNIX_EPOCH)
|
||||
.unwrap();
|
||||
|
||||
assert!(second_time - first_time >= wait_time);
|
||||
}
|
||||
|
||||
/// State Under Test: `LowResTimeService::now()` updates returned value every resolution period.
|
||||
///
|
||||
/// Expected Behavior: Two calls of `LowResTimeService::now()` made in subsequent resolution interval return different values
|
||||
/// and second value is greater than the first one at least by a resolution interval.
|
||||
#[actix_rt::test]
|
||||
async fn low_res_time_service_time_updates_after_resolution_interval() {
|
||||
let resolution = Duration::from_millis(100);
|
||||
let wait_time = Duration::from_millis(300);
|
||||
let time_service = LowResTimeService::with(resolution);
|
||||
|
||||
let first_time = time_service.now();
|
||||
|
||||
delay_for(wait_time).await;
|
||||
|
||||
let second_time = time_service.now();
|
||||
assert!(second_time - first_time >= wait_time);
|
||||
}
|
||||
}
|
||||
@ -2,15 +2,14 @@
|
||||
//!
|
||||
//! If the response does not complete within the specified timeout, the response
|
||||
//! will be aborted.
|
||||
use std::future::Future;
|
||||
use std::marker::PhantomData;
|
||||
use std::pin::Pin;
|
||||
use std::task::{Context, Poll};
|
||||
use std::{fmt, time};
|
||||
use core::future::Future;
|
||||
use core::marker::PhantomData;
|
||||
use core::pin::Pin;
|
||||
use core::task::{Context, Poll};
|
||||
use core::{fmt, time};
|
||||
|
||||
use actix_rt::time::{delay_for, Delay};
|
||||
use actix_service::{IntoService, Service, Transform};
|
||||
use futures_util::future::{ok, Ready};
|
||||
|
||||
/// Applies a timeout to requests.
|
||||
#[derive(Debug)]
|
||||
@ -85,15 +84,35 @@ where
|
||||
type Request = S::Request;
|
||||
type Response = S::Response;
|
||||
type Error = TimeoutError<S::Error>;
|
||||
type InitError = E;
|
||||
type Transform = TimeoutService<S>;
|
||||
type Future = Ready<Result<Self::Transform, Self::InitError>>;
|
||||
type InitError = E;
|
||||
type Future = TimeoutFuture<Self::Transform, Self::InitError>;
|
||||
|
||||
fn new_transform(&self, service: S) -> Self::Future {
|
||||
ok(TimeoutService {
|
||||
let service = TimeoutService {
|
||||
service,
|
||||
timeout: self.timeout,
|
||||
})
|
||||
};
|
||||
|
||||
TimeoutFuture {
|
||||
service: Some(service),
|
||||
_err: PhantomData,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct TimeoutFuture<T, E> {
|
||||
service: Option<T>,
|
||||
_err: PhantomData<E>,
|
||||
}
|
||||
|
||||
impl<T, E> Unpin for TimeoutFuture<T, E> {}
|
||||
|
||||
impl<T, E> Future for TimeoutFuture<T, E> {
|
||||
type Output = Result<T, E>;
|
||||
|
||||
fn poll(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
Poll::Ready(Ok(self.get_mut().service.take().unwrap()))
|
||||
}
|
||||
}
|
||||
|
||||
@ -140,13 +159,14 @@ where
|
||||
}
|
||||
}
|
||||
|
||||
/// `TimeoutService` response future
|
||||
#[pin_project::pin_project]
|
||||
#[derive(Debug)]
|
||||
pub struct TimeoutServiceResponse<T: Service> {
|
||||
pin_project_lite::pin_project! {
|
||||
/// `TimeoutService` response future
|
||||
#[derive(Debug)]
|
||||
pub struct TimeoutServiceResponse<T: Service> {
|
||||
#[pin]
|
||||
fut: T::Future,
|
||||
sleep: Delay,
|
||||
}
|
||||
}
|
||||
|
||||
impl<T> Future for TimeoutServiceResponse<T>
|
||||
@ -156,20 +176,20 @@ where
|
||||
type Output = Result<T::Response, TimeoutError<T::Error>>;
|
||||
|
||||
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
|
||||
let mut this = self.project();
|
||||
let this = self.project();
|
||||
|
||||
// First, try polling the future
|
||||
match this.fut.poll(cx) {
|
||||
Poll::Ready(Ok(v)) => return Poll::Ready(Ok(v)),
|
||||
Poll::Ready(Err(e)) => return Poll::Ready(Err(TimeoutError::Service(e))),
|
||||
Poll::Pending => {}
|
||||
if let Poll::Ready(res) = this.fut.poll(cx) {
|
||||
return match res {
|
||||
Ok(v) => Poll::Ready(Ok(v)),
|
||||
Err(e) => Poll::Ready(Err(TimeoutError::Service(e))),
|
||||
};
|
||||
}
|
||||
|
||||
// Now check the sleep
|
||||
match Pin::new(&mut this.sleep).poll(cx) {
|
||||
Poll::Pending => Poll::Pending,
|
||||
Poll::Ready(_) => Poll::Ready(Err(TimeoutError::Timeout)),
|
||||
}
|
||||
Pin::new(this.sleep)
|
||||
.poll(cx)
|
||||
.map(|_| Err(TimeoutError::Timeout))
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user