mirror of
https://github.com/tokio-rs/tokio.git
synced 2026-08-29 00:00:11 +02:00
executor: move into tokio crate (#1702)
A step towards collapsing Tokio sub crates into a single `tokio` crate (#1318). The executor implementation is now provided by the main `tokio` crate. Functionality can be opted out of by using the various net related feature flags.
This commit is contained in:
Carl Lerche
@@ -0,0 +1,781 @@
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#![warn(rust_2018_idioms)]
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#![cfg(not(miri))]
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use tokio::executor::current_thread::{self, block_on_all, CurrentThread, TaskExecutor};
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use tokio::executor::TypedExecutor;
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use tokio::sync::oneshot;
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use std::any::Any;
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use std::cell::{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 std::thread;
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use std::time::Duration;
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mod from_block_on_all {
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use super::*;
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fn test<F: Fn(Pin<Box<dyn Future<Output = ()>>>) + 'static>(spawn: F) {
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let cnt = Rc::new(Cell::new(0));
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let c = cnt.clone();
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let msg = block_on_all(async move {
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c.set(1 + c.get());
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// Spawn!
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spawn(Box::pin(async move {
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c.set(1 + c.get());
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}));
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"hello"
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});
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assert_eq!(2, cnt.get());
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assert_eq!(msg, "hello");
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn)
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}
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#[test]
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fn execute() {
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test(|f| {
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TaskExecutor::current().spawn(f).unwrap();
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});
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}
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}
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#[test]
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fn block_waits() {
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let (tx, rx) = oneshot::channel();
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thread::spawn(|| {
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thread::sleep(Duration::from_millis(1000));
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tx.send(()).unwrap();
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});
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let cnt = Rc::new(Cell::new(0));
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let cnt2 = cnt.clone();
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block_on_all(async move {
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rx.await.unwrap();
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cnt.set(1 + cnt.get());
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});
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assert_eq!(1, cnt2.get());
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}
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#[test]
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fn spawn_many() {
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const ITER: usize = 200;
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let cnt = Rc::new(Cell::new(0));
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let mut tokio_current_thread = CurrentThread::new();
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for _ in 0..ITER {
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let cnt = cnt.clone();
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tokio_current_thread.spawn(async move {
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cnt.set(1 + cnt.get());
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});
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}
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tokio_current_thread.run().unwrap();
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assert_eq!(cnt.get(), ITER);
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}
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mod does_not_set_global_executor_by_default {
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use super::*;
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fn test<F: Fn(Pin<Box<dyn Future<Output = ()> + Send>>) -> Result<(), E> + 'static, E>(
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spawn: F,
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) {
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block_on_all(async {
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spawn(Box::pin(async {})).unwrap_err();
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});
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}
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#[test]
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fn spawn() {
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test(|f| tokio::executor::DefaultExecutor::current().spawn(f))
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}
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}
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mod from_block_on_future {
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use super::*;
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fn test<F: Fn(Pin<Box<dyn Future<Output = ()>>>)>(spawn: F) {
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let cnt = Rc::new(Cell::new(0));
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let cnt2 = cnt.clone();
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let mut tokio_current_thread = CurrentThread::new();
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tokio_current_thread.block_on(async move {
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let cnt3 = cnt2.clone();
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spawn(Box::pin(async move {
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cnt3.set(1 + cnt3.get());
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}));
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});
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tokio_current_thread.run().unwrap();
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assert_eq!(1, cnt.get());
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn);
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}
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#[test]
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fn execute() {
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test(|f| {
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current_thread::TaskExecutor::current().spawn(f).unwrap();
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});
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}
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}
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mod outstanding_tasks_are_dropped_when_executor_is_dropped {
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use super::*;
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#[allow(unreachable_code)] // TODO: remove this when https://github.com/rust-lang/rust/issues/64636 fixed.
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async fn never(_rc: Rc<()>) {
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loop {
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yield_once().await;
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}
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}
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fn test<F, G>(spawn: F, dotspawn: G)
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where
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F: Fn(Pin<Box<dyn Future<Output = ()>>>) + 'static,
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G: Fn(&mut CurrentThread, Pin<Box<dyn Future<Output = ()>>>),
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{
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let mut rc = Rc::new(());
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let mut tokio_current_thread = CurrentThread::new();
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dotspawn(&mut tokio_current_thread, Box::pin(never(rc.clone())));
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drop(tokio_current_thread);
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// Ensure the daemon is dropped
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assert!(Rc::get_mut(&mut rc).is_some());
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// Using the global spawn fn
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let mut rc = Rc::new(());
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let rc2 = rc.clone();
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let mut tokio_current_thread = CurrentThread::new();
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tokio_current_thread.block_on(async move {
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spawn(Box::pin(never(rc2)));
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});
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drop(tokio_current_thread);
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// Ensure the daemon is dropped
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assert!(Rc::get_mut(&mut rc).is_some());
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn, |rt, f| {
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rt.spawn(f);
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})
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}
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#[test]
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fn execute() {
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test(
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|f| {
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current_thread::TaskExecutor::current().spawn(f).unwrap();
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},
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// Note: `CurrentThread` doesn't currently implement
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// `futures::Executor`, so we'll call `.spawn(...)` rather than
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// `.execute(...)` for now. If `CurrentThread` is changed to
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// implement Executor, change this to `.execute(...).unwrap()`.
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|rt, f| {
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rt.spawn(f);
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},
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);
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}
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}
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#[test]
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#[should_panic]
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fn nesting_run() {
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block_on_all(async {
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block_on_all(async {});
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});
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}
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mod run_in_future {
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use super::*;
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#[test]
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#[should_panic]
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fn spawn() {
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block_on_all(async {
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current_thread::spawn(async {
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block_on_all(async {});
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});
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});
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}
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#[test]
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#[should_panic]
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fn execute() {
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block_on_all(async {
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current_thread::TaskExecutor::current()
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.spawn(async {
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block_on_all(async {});
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})
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.unwrap();
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});
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}
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}
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#[test]
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fn tick_on_infini_future() {
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let num = Rc::new(Cell::new(0));
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#[allow(unreachable_code)] // TODO: remove this when https://github.com/rust-lang/rust/issues/64636 fixed.
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async fn infini(num: Rc<Cell<usize>>) {
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loop {
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num.set(1 + num.get());
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yield_once().await
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}
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}
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CurrentThread::new()
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.spawn(infini(num.clone()))
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.turn(None)
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.unwrap();
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assert_eq!(1, num.get());
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}
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mod tasks_are_scheduled_fairly {
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use super::*;
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#[allow(unreachable_code)] // TODO: remove this when https://github.com/rust-lang/rust/issues/64636 fixed.
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async fn spin(state: Rc<RefCell<[i32; 2]>>, idx: usize) {
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loop {
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// borrow_mut scope
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{
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let mut state = state.borrow_mut();
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if idx == 0 {
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let diff = state[0] - state[1];
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assert!(diff.abs() <= 1);
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if state[0] >= 50 {
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return;
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}
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}
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state[idx] += 1;
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if state[idx] >= 100 {
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return;
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}
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}
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yield_once().await;
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}
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}
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fn test<F: Fn(Pin<Box<dyn Future<Output = ()>>>)>(spawn: F) {
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let state = Rc::new(RefCell::new([0, 0]));
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block_on_all(async move {
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spawn(Box::pin(spin(state.clone(), 0)));
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spawn(Box::pin(spin(state, 1)));
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});
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn)
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}
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#[test]
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fn execute() {
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test(|f| {
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current_thread::TaskExecutor::current().spawn(f).unwrap();
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})
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}
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}
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mod and_turn {
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use super::*;
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fn test<F, G>(spawn: F, dotspawn: G)
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where
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F: Fn(Pin<Box<dyn Future<Output = ()>>>) + 'static,
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G: Fn(&mut CurrentThread, Pin<Box<dyn Future<Output = ()>>>),
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{
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let cnt = Rc::new(Cell::new(0));
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let c = cnt.clone();
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let mut tokio_current_thread = CurrentThread::new();
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// Spawn a basic task to get the executor to turn
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dotspawn(&mut tokio_current_thread, Box::pin(async {}));
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// Turn once...
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tokio_current_thread.turn(None).unwrap();
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dotspawn(
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&mut tokio_current_thread,
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Box::pin(async move {
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c.set(1 + c.get());
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// Spawn!
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spawn(Box::pin(async move {
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c.set(1 + c.get());
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}));
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}),
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);
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// This does not run the newly spawned thread
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tokio_current_thread.turn(None).unwrap();
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assert_eq!(1, cnt.get());
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// This runs the newly spawned thread
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tokio_current_thread.turn(None).unwrap();
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assert_eq!(2, cnt.get());
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn, |rt, f| {
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rt.spawn(f);
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})
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}
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#[test]
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fn execute() {
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test(
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|f| {
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current_thread::TaskExecutor::current().spawn(f).unwrap();
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},
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// Note: `CurrentThread` doesn't currently implement
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// `futures::Executor`, so we'll call `.spawn(...)` rather than
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// `.execute(...)` for now. If `CurrentThread` is changed to
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// implement Executor, change this to `.execute(...).unwrap()`.
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|rt, f| {
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rt.spawn(f);
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},
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);
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}
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}
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mod in_drop {
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use super::*;
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struct OnDrop<F: FnOnce()>(Option<F>);
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impl<F: FnOnce()> Drop for OnDrop<F> {
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fn drop(&mut self) {
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(self.0.take().unwrap())();
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}
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}
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async fn noop(_data: Box<dyn Any>) {}
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fn test<F, G>(spawn: F, dotspawn: G)
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where
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F: Fn(Pin<Box<dyn Future<Output = ()>>>) + 'static,
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G: Fn(&mut CurrentThread, Pin<Box<dyn Future<Output = ()>>>),
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{
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let mut tokio_current_thread = CurrentThread::new();
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let (tx, rx) = oneshot::channel();
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dotspawn(
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&mut tokio_current_thread,
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Box::pin(noop(Box::new(OnDrop(Some(move || {
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spawn(Box::pin(async move {
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tx.send(()).unwrap();
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}));
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}))))),
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);
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tokio_current_thread.block_on(rx).unwrap();
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tokio_current_thread.run().unwrap();
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}
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#[test]
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fn spawn() {
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test(current_thread::spawn, |rt, f| {
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rt.spawn(f);
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})
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}
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#[test]
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fn execute() {
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test(
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|f| {
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current_thread::TaskExecutor::current().spawn(f).unwrap();
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},
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// Note: `CurrentThread` doesn't currently implement
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// `futures::Executor`, so we'll call `.spawn(...)` rather than
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// `.execute(...)` for now. If `CurrentThread` is changed to
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// implement Executor, change this to `.execute(...).unwrap()`.
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|rt, f| {
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rt.spawn(f);
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},
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);
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}
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}
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/*
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#[test]
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fn hammer_turn() {
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use futures::sync::mpsc;
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const ITER: usize = 100;
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const N: usize = 100;
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const THREADS: usize = 4;
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for _ in 0..ITER {
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let mut ths = vec![];
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// Add some jitter
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for _ in 0..THREADS {
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let th = thread::spawn(|| {
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let mut tokio_current_thread = CurrentThread::new();
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let (tx, rx) = mpsc::unbounded();
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tokio_current_thread.spawn({
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let cnt = Rc::new(Cell::new(0));
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let c = cnt.clone();
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rx.for_each(move |_| {
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c.set(1 + c.get());
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Ok(())
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})
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.map_err(|e| panic!("err={:?}", e))
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.map(move |v| {
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assert_eq!(N, cnt.get());
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v
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})
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});
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thread::spawn(move || {
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for _ in 0..N {
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tx.unbounded_send(()).unwrap();
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thread::yield_now();
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}
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});
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while !tokio_current_thread.is_idle() {
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tokio_current_thread.turn(None).unwrap();
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}
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});
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ths.push(th);
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}
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for th in ths {
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th.join().unwrap();
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}
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}
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}
|
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*/
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#[test]
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fn turn_has_polled() {
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let mut tokio_current_thread = CurrentThread::new();
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// Spawn oneshot receiver
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let (sender, receiver) = oneshot::channel::<()>();
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tokio_current_thread.spawn(async move {
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let _ = receiver.await;
|
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});
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|
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// Turn once...
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let res = tokio_current_thread
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.turn(Some(Duration::from_millis(0)))
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.unwrap();
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// Should've polled the receiver once, but considered it not ready
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assert!(res.has_polled());
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// Turn another time
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let res = tokio_current_thread
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.turn(Some(Duration::from_millis(0)))
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.unwrap();
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// Should've polled nothing, the receiver is not ready yet
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assert!(!res.has_polled());
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// Make the receiver ready
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sender.send(()).unwrap();
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// Turn another time
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let res = tokio_current_thread
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.turn(Some(Duration::from_millis(0)))
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.unwrap();
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// Should've polled the receiver, it's ready now
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assert!(res.has_polled());
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// Now the executor should be empty
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assert!(tokio_current_thread.is_idle());
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let res = tokio_current_thread
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||||
.turn(Some(Duration::from_millis(0)))
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.unwrap();
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// So should've polled nothing
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assert!(!res.has_polled());
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}
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|
||||
// Our own mock Park that is never really waiting and the only
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// thing it does is to send, on request, something (once) to a oneshot
|
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// channel
|
||||
struct MyPark {
|
||||
sender: Option<oneshot::Sender<()>>,
|
||||
send_now: Rc<Cell<bool>>,
|
||||
}
|
||||
|
||||
struct MyUnpark;
|
||||
|
||||
impl tokio::executor::park::Park for MyPark {
|
||||
type Unpark = MyUnpark;
|
||||
type Error = ();
|
||||
|
||||
fn unpark(&self) -> Self::Unpark {
|
||||
MyUnpark
|
||||
}
|
||||
|
||||
fn park(&mut self) -> Result<(), Self::Error> {
|
||||
// If called twice with send_now, this will intentionally panic
|
||||
if self.send_now.get() {
|
||||
self.sender.take().unwrap().send(()).unwrap();
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn park_timeout(&mut self, _duration: Duration) -> Result<(), Self::Error> {
|
||||
self.park()
|
||||
}
|
||||
}
|
||||
|
||||
impl tokio::executor::park::Unpark for MyUnpark {
|
||||
fn unpark(&self) {}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn turn_fair() {
|
||||
let send_now = Rc::new(Cell::new(false));
|
||||
|
||||
let (sender, receiver) = oneshot::channel::<()>();
|
||||
let (sender_2, receiver_2) = oneshot::channel::<()>();
|
||||
let (sender_3, receiver_3) = oneshot::channel::<()>();
|
||||
|
||||
let my_park = MyPark {
|
||||
sender: Some(sender_3),
|
||||
send_now: send_now.clone(),
|
||||
};
|
||||
|
||||
let mut tokio_current_thread = CurrentThread::new_with_park(my_park);
|
||||
|
||||
let receiver_1_done = Rc::new(Cell::new(false));
|
||||
let receiver_1_done_clone = receiver_1_done.clone();
|
||||
|
||||
// Once an item is received on the oneshot channel, it will immediately
|
||||
// immediately make the second oneshot channel ready
|
||||
|
||||
tokio_current_thread.spawn(async move {
|
||||
receiver.await.unwrap();
|
||||
sender_2.send(()).unwrap();
|
||||
receiver_1_done_clone.set(true);
|
||||
});
|
||||
|
||||
let receiver_2_done = Rc::new(Cell::new(false));
|
||||
let receiver_2_done_clone = receiver_2_done.clone();
|
||||
|
||||
tokio_current_thread.spawn(async move {
|
||||
receiver_2.await.unwrap();
|
||||
receiver_2_done_clone.set(true);
|
||||
});
|
||||
|
||||
// The third receiver is only woken up from our Park implementation, it simulates
|
||||
// e.g. a socket that first has to be polled to know if it is ready now
|
||||
let receiver_3_done = Rc::new(Cell::new(false));
|
||||
let receiver_3_done_clone = receiver_3_done.clone();
|
||||
|
||||
tokio_current_thread.spawn(async move {
|
||||
receiver_3.await.unwrap();
|
||||
receiver_3_done_clone.set(true);
|
||||
});
|
||||
|
||||
// First turn should've polled both and considered them not ready
|
||||
let res = tokio_current_thread
|
||||
.turn(Some(Duration::from_millis(0)))
|
||||
.unwrap();
|
||||
assert!(res.has_polled());
|
||||
|
||||
// Next turn should've polled nothing
|
||||
let res = tokio_current_thread
|
||||
.turn(Some(Duration::from_millis(0)))
|
||||
.unwrap();
|
||||
assert!(!res.has_polled());
|
||||
|
||||
assert!(!receiver_1_done.get());
|
||||
assert!(!receiver_2_done.get());
|
||||
assert!(!receiver_3_done.get());
|
||||
|
||||
// After this the receiver future will wake up the second receiver future,
|
||||
// so there are pending futures again
|
||||
sender.send(()).unwrap();
|
||||
|
||||
// Now the first receiver should be done, the second receiver should be ready
|
||||
// to be polled again and the socket not yet
|
||||
let res = tokio_current_thread.turn(None).unwrap();
|
||||
assert!(res.has_polled());
|
||||
|
||||
assert!(receiver_1_done.get());
|
||||
assert!(!receiver_2_done.get());
|
||||
assert!(!receiver_3_done.get());
|
||||
|
||||
// Now let our park implementation know that it should send something to sender 3
|
||||
send_now.set(true);
|
||||
|
||||
// This should resolve the second receiver directly, but also poll the socket
|
||||
// and read the packet from it. If it didn't do both here, we would handle
|
||||
// futures that are woken up from the reactor and directly unfairly and would
|
||||
// favour the ones that are woken up directly.
|
||||
let res = tokio_current_thread.turn(None).unwrap();
|
||||
assert!(res.has_polled());
|
||||
|
||||
assert!(receiver_1_done.get());
|
||||
assert!(receiver_2_done.get());
|
||||
assert!(receiver_3_done.get());
|
||||
|
||||
// Don't send again
|
||||
send_now.set(false);
|
||||
|
||||
// Now we should be idle and turning should not poll anything
|
||||
assert!(tokio_current_thread.is_idle());
|
||||
let res = tokio_current_thread.turn(None).unwrap();
|
||||
assert!(!res.has_polled());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn spawn_from_other_thread() {
|
||||
let mut current_thread = CurrentThread::new();
|
||||
|
||||
let handle = current_thread.handle();
|
||||
let (sender, receiver) = oneshot::channel::<()>();
|
||||
|
||||
thread::spawn(move || {
|
||||
handle
|
||||
.spawn(async move {
|
||||
sender.send(()).unwrap();
|
||||
})
|
||||
.unwrap();
|
||||
});
|
||||
|
||||
let _ = current_thread.block_on(receiver).unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn spawn_from_other_thread_unpark() {
|
||||
use std::sync::mpsc::channel as mpsc_channel;
|
||||
|
||||
let mut current_thread = CurrentThread::new();
|
||||
|
||||
let handle = current_thread.handle();
|
||||
let (sender_1, receiver_1) = oneshot::channel::<()>();
|
||||
let (sender_2, receiver_2) = mpsc_channel::<()>();
|
||||
|
||||
thread::spawn(move || {
|
||||
let _ = receiver_2.recv().unwrap();
|
||||
|
||||
handle
|
||||
.spawn(async move {
|
||||
sender_1.send(()).unwrap();
|
||||
})
|
||||
.unwrap();
|
||||
});
|
||||
|
||||
// Ensure that unparking the executor works correctly. It will first
|
||||
// check if there are new futures (there are none), then execute the
|
||||
// lazy future below which will cause the future to be spawned from
|
||||
// the other thread. Then the executor will park but should be woken
|
||||
// up because *now* we have a new future to schedule
|
||||
let _ = current_thread.block_on(async move {
|
||||
// inlined 'lazy'
|
||||
async move {
|
||||
sender_2.send(()).unwrap();
|
||||
}
|
||||
.await;
|
||||
receiver_1.await.unwrap();
|
||||
});
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn spawn_from_executor_with_handle() {
|
||||
let mut current_thread = CurrentThread::new();
|
||||
let handle = current_thread.handle();
|
||||
let (tx, rx) = oneshot::channel();
|
||||
|
||||
current_thread.spawn(async move {
|
||||
handle
|
||||
.spawn(async move {
|
||||
tx.send(()).unwrap();
|
||||
})
|
||||
.unwrap();
|
||||
});
|
||||
|
||||
current_thread.block_on(rx).unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn handle_status() {
|
||||
let current_thread = CurrentThread::new();
|
||||
let handle = current_thread.handle();
|
||||
assert!(handle.status().is_ok());
|
||||
|
||||
drop(current_thread);
|
||||
assert!(handle.spawn(async { () }).is_err());
|
||||
assert!(handle.status().is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn handle_is_sync() {
|
||||
let current_thread = CurrentThread::new();
|
||||
let handle = current_thread.handle();
|
||||
|
||||
let _box: Box<dyn Sync> = Box::new(handle);
|
||||
}
|
||||
|
||||
async fn yield_once() {
|
||||
YieldOnce(false).await
|
||||
}
|
||||
|
||||
struct YieldOnce(bool);
|
||||
|
||||
impl Future for YieldOnce {
|
||||
type Output = ();
|
||||
|
||||
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
|
||||
if self.0 {
|
||||
Poll::Ready(())
|
||||
} else {
|
||||
self.0 = true;
|
||||
// Push to the back of the executor's queue
|
||||
cx.waker().wake_by_ref();
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,24 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
|
||||
use tokio::executor::DefaultExecutor;
|
||||
|
||||
use std::future::Future;
|
||||
use std::pin::Pin;
|
||||
|
||||
mod out_of_executor_context {
|
||||
use super::*;
|
||||
use tokio::executor::Executor;
|
||||
|
||||
fn test<F, E>(spawn: F)
|
||||
where
|
||||
F: Fn(Pin<Box<dyn Future<Output = ()> + Send>>) -> Result<(), E>,
|
||||
{
|
||||
let res = spawn(Box::pin(async {}));
|
||||
assert!(res.is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn spawn() {
|
||||
test(|f| DefaultExecutor::current().spawn(f));
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,17 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
|
||||
#[test]
|
||||
fn block_on_ready() {
|
||||
let mut enter = tokio::executor::enter().unwrap();
|
||||
let val = enter.block_on(async { 123 });
|
||||
|
||||
assert_eq!(val, 123);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn block_on_pending() {
|
||||
let mut enter = tokio::executor::enter().unwrap();
|
||||
let val = enter.block_on(async { 123 });
|
||||
|
||||
assert_eq!(val, 123);
|
||||
}
|
||||
@@ -0,0 +1,17 @@
|
||||
use tokio::executor::{with_default, DefaultExecutor};
|
||||
|
||||
#[test]
|
||||
fn default_executor_is_send_and_sync() {
|
||||
fn assert_send_sync<T: Send + Sync>() {}
|
||||
|
||||
assert_send_sync::<DefaultExecutor>();
|
||||
}
|
||||
|
||||
#[test]
|
||||
#[should_panic]
|
||||
fn nested_default_executor_status() {
|
||||
let _enter = tokio::executor::enter().unwrap();
|
||||
let mut executor = DefaultExecutor::current();
|
||||
|
||||
let _result = with_default(&mut executor, || ());
|
||||
}
|
||||
@@ -61,7 +61,7 @@ fn test_drop_on_notify() {
|
||||
}
|
||||
}));
|
||||
|
||||
let _enter = tokio_executor::enter().unwrap();
|
||||
let _enter = tokio::executor::enter().unwrap();
|
||||
|
||||
{
|
||||
let handle = reactor.handle();
|
||||
|
||||
@@ -1,5 +1,4 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
#![cfg(feature = "default")]
|
||||
|
||||
use tokio::io::{AsyncReadExt, AsyncWriteExt};
|
||||
use tokio::net::{TcpListener, TcpStream};
|
||||
@@ -133,6 +132,6 @@ fn racy() {
|
||||
// wait for runtime thread to exit
|
||||
jh.join().unwrap();
|
||||
|
||||
let mut e = tokio_executor::enter().unwrap();
|
||||
let mut e = tokio::executor::enter().unwrap();
|
||||
e.block_on(rx).unwrap();
|
||||
}
|
||||
|
||||
@@ -1,7 +1,5 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
#![cfg(feature = "default")]
|
||||
|
||||
use tokio;
|
||||
use tokio::io::{AsyncReadExt, AsyncWriteExt};
|
||||
use tokio::net::{TcpListener, TcpStream};
|
||||
use tokio::runtime::Runtime;
|
||||
@@ -9,7 +7,6 @@ use tokio::sync::oneshot;
|
||||
use tokio::timer::delay;
|
||||
use tokio_test::{assert_err, assert_ok};
|
||||
|
||||
use env_logger;
|
||||
use std::sync::{mpsc, Arc, Mutex};
|
||||
use std::thread;
|
||||
use std::time::{Duration, Instant};
|
||||
@@ -146,7 +143,7 @@ fn nested_enter() {
|
||||
|
||||
let rt = Runtime::new().unwrap();
|
||||
rt.block_on(async {
|
||||
assert_err!(tokio_executor::enter());
|
||||
assert_err!(tokio::executor::enter());
|
||||
|
||||
let res = panic::catch_unwind(move || {
|
||||
let rt = Runtime::new().unwrap();
|
||||
|
||||
@@ -0,0 +1,478 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
|
||||
use tokio::executor::park::{Park, Unpark};
|
||||
use tokio::executor::thread_pool::*;
|
||||
|
||||
use futures_util::future::poll_fn;
|
||||
use std::cell::Cell;
|
||||
use std::future::Future;
|
||||
use std::pin::Pin;
|
||||
use std::sync::atomic::Ordering::Relaxed;
|
||||
use std::sync::atomic::*;
|
||||
use std::sync::{mpsc, Arc};
|
||||
use std::task::{Context, Poll, Waker};
|
||||
use std::time::Duration;
|
||||
|
||||
thread_local!(static FOO: Cell<u32> = Cell::new(0));
|
||||
|
||||
#[test]
|
||||
fn shutdown_drops_futures() {
|
||||
for _ in 0..1_000 {
|
||||
let num_inc = Arc::new(AtomicUsize::new(0));
|
||||
let num_dec = Arc::new(AtomicUsize::new(0));
|
||||
let num_drop = Arc::new(AtomicUsize::new(0));
|
||||
|
||||
struct Never(Arc<AtomicUsize>);
|
||||
|
||||
impl Future for Never {
|
||||
type Output = ();
|
||||
|
||||
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> {
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for Never {
|
||||
fn drop(&mut self) {
|
||||
self.0.fetch_add(1, Relaxed);
|
||||
}
|
||||
}
|
||||
|
||||
let a = num_inc.clone();
|
||||
let b = num_dec.clone();
|
||||
|
||||
let mut pool = Builder::new()
|
||||
.around_worker(move |_, work| {
|
||||
a.fetch_add(1, Relaxed);
|
||||
work();
|
||||
b.fetch_add(1, Relaxed);
|
||||
})
|
||||
.build();
|
||||
|
||||
// let tx = pool.sender().clone();
|
||||
|
||||
pool.spawn(Never(num_drop.clone()));
|
||||
|
||||
// Wait for the pool to shutdown
|
||||
pool.shutdown_now();
|
||||
|
||||
// Assert that only a single thread was spawned.
|
||||
let a = num_inc.load(Relaxed);
|
||||
assert!(a >= 1);
|
||||
|
||||
// Assert that all threads shutdown
|
||||
let b = num_dec.load(Relaxed);
|
||||
assert_eq!(a, b);
|
||||
|
||||
// Assert that the future was dropped
|
||||
let c = num_drop.load(Relaxed);
|
||||
assert_eq!(c, 1);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn drop_threadpool_drops_futures() {
|
||||
const NUM_THREADS: usize = 10;
|
||||
|
||||
for _ in 0..1_000 {
|
||||
let num_inc = Arc::new(AtomicUsize::new(0));
|
||||
let num_dec = Arc::new(AtomicUsize::new(0));
|
||||
let num_drop = Arc::new(AtomicUsize::new(0));
|
||||
|
||||
struct Never(Arc<AtomicUsize>);
|
||||
|
||||
impl Future for Never {
|
||||
type Output = ();
|
||||
|
||||
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> {
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for Never {
|
||||
fn drop(&mut self) {
|
||||
self.0.fetch_add(1, Relaxed);
|
||||
}
|
||||
}
|
||||
|
||||
let a = num_inc.clone();
|
||||
let b = num_dec.clone();
|
||||
|
||||
let pool = Builder::new()
|
||||
.num_threads(NUM_THREADS)
|
||||
.around_worker(move |_, work| {
|
||||
a.fetch_add(1, Relaxed);
|
||||
work();
|
||||
b.fetch_add(1, Relaxed);
|
||||
})
|
||||
.build();
|
||||
|
||||
pool.spawn(Never(num_drop.clone()));
|
||||
|
||||
// Wait for the pool to shutdown
|
||||
drop(pool);
|
||||
|
||||
// Assert that all the threads spawned
|
||||
let a = num_inc.load(Relaxed);
|
||||
assert_eq!(a, NUM_THREADS);
|
||||
|
||||
// Assert that all threads shutdown
|
||||
let b = num_dec.load(Relaxed);
|
||||
assert_eq!(a, b);
|
||||
|
||||
// Assert that the future was dropped
|
||||
let c = num_drop.load(Relaxed);
|
||||
assert_eq!(c, 1);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn many_oneshot_futures() {
|
||||
// used for notifying the main thread
|
||||
const NUM: usize = 10_000;
|
||||
|
||||
for _ in 0..50 {
|
||||
let (tx, rx) = mpsc::channel();
|
||||
|
||||
let mut pool = new_pool();
|
||||
let cnt = Arc::new(AtomicUsize::new(0));
|
||||
|
||||
for _ in 0..NUM {
|
||||
let cnt = cnt.clone();
|
||||
let tx = tx.clone();
|
||||
|
||||
pool.spawn(async move {
|
||||
let num = cnt.fetch_add(1, Relaxed) + 1;
|
||||
|
||||
if num == NUM {
|
||||
tx.send(()).unwrap();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
rx.recv().unwrap();
|
||||
|
||||
// Wait for the pool to shutdown
|
||||
pool.shutdown_now();
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn many_multishot_futures() {
|
||||
use tokio::sync::mpsc;
|
||||
|
||||
const CHAIN: usize = 200;
|
||||
const CYCLES: usize = 5;
|
||||
const TRACKS: usize = 50;
|
||||
|
||||
for _ in 0..50 {
|
||||
let pool = new_pool();
|
||||
let mut start_txs = Vec::with_capacity(TRACKS);
|
||||
let mut final_rxs = Vec::with_capacity(TRACKS);
|
||||
|
||||
for _ in 0..TRACKS {
|
||||
let (start_tx, mut chain_rx) = mpsc::channel(10);
|
||||
|
||||
for _ in 0..CHAIN {
|
||||
let (mut next_tx, next_rx) = mpsc::channel(10);
|
||||
|
||||
// Forward all the messages
|
||||
pool.spawn(async move {
|
||||
while let Some(v) = chain_rx.recv().await {
|
||||
next_tx.send(v).await.unwrap();
|
||||
}
|
||||
});
|
||||
|
||||
chain_rx = next_rx;
|
||||
}
|
||||
|
||||
// This final task cycles if needed
|
||||
let (mut final_tx, final_rx) = mpsc::channel(10);
|
||||
let mut cycle_tx = start_tx.clone();
|
||||
let mut rem = CYCLES;
|
||||
|
||||
pool.spawn(async move {
|
||||
for _ in 0..CYCLES {
|
||||
let msg = chain_rx.recv().await.unwrap();
|
||||
|
||||
rem -= 1;
|
||||
|
||||
if rem == 0 {
|
||||
final_tx.send(msg).await.unwrap();
|
||||
} else {
|
||||
cycle_tx.send(msg).await.unwrap();
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
start_txs.push(start_tx);
|
||||
final_rxs.push(final_rx);
|
||||
}
|
||||
|
||||
{
|
||||
let mut e = tokio::executor::enter().unwrap();
|
||||
|
||||
e.block_on(async move {
|
||||
for mut start_tx in start_txs {
|
||||
start_tx.send("ping").await.unwrap();
|
||||
}
|
||||
|
||||
for mut final_rx in final_rxs {
|
||||
final_rx.recv().await.unwrap();
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn global_executor_is_configured() {
|
||||
let pool = new_pool();
|
||||
|
||||
let (signal_tx, signal_rx) = mpsc::channel();
|
||||
|
||||
pool.spawn(async move {
|
||||
tokio::executor::spawn(async move {
|
||||
signal_tx.send(()).unwrap();
|
||||
});
|
||||
});
|
||||
|
||||
signal_rx.recv().unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn new_threadpool_is_idle() {
|
||||
let mut pool = new_pool();
|
||||
pool.shutdown_now();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn panic_in_task() {
|
||||
let pool = new_pool();
|
||||
let (tx, rx) = mpsc::channel();
|
||||
|
||||
struct Boom(mpsc::Sender<()>);
|
||||
|
||||
impl Future for Boom {
|
||||
type Output = ();
|
||||
|
||||
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> {
|
||||
panic!();
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for Boom {
|
||||
fn drop(&mut self) {
|
||||
assert!(::std::thread::panicking());
|
||||
self.0.send(()).unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
pool.spawn(Boom(tx));
|
||||
rx.recv().unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn multi_threadpool() {
|
||||
use tokio_sync::oneshot;
|
||||
|
||||
let pool1 = new_pool();
|
||||
let pool2 = new_pool();
|
||||
|
||||
let (tx, rx) = oneshot::channel();
|
||||
let (done_tx, done_rx) = mpsc::channel();
|
||||
|
||||
pool2.spawn(async move {
|
||||
rx.await.unwrap();
|
||||
done_tx.send(()).unwrap();
|
||||
});
|
||||
|
||||
pool1.spawn(async move {
|
||||
tx.send(()).unwrap();
|
||||
});
|
||||
|
||||
done_rx.recv().unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn eagerly_drops_futures() {
|
||||
use std::sync::{mpsc, Mutex};
|
||||
|
||||
struct MyPark {
|
||||
rx: mpsc::Receiver<()>,
|
||||
tx: Mutex<mpsc::Sender<()>>,
|
||||
#[allow(dead_code)]
|
||||
park_tx: mpsc::SyncSender<()>,
|
||||
unpark_tx: mpsc::SyncSender<()>,
|
||||
}
|
||||
|
||||
impl Park for MyPark {
|
||||
type Unpark = MyUnpark;
|
||||
type Error = ();
|
||||
|
||||
fn unpark(&self) -> Self::Unpark {
|
||||
MyUnpark {
|
||||
tx: Mutex::new(self.tx.lock().unwrap().clone()),
|
||||
unpark_tx: self.unpark_tx.clone(),
|
||||
}
|
||||
}
|
||||
|
||||
fn park(&mut self) -> Result<(), Self::Error> {
|
||||
let _ = self.rx.recv();
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn park_timeout(&mut self, duration: Duration) -> Result<(), Self::Error> {
|
||||
let _ = self.rx.recv_timeout(duration);
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
struct MyUnpark {
|
||||
tx: Mutex<mpsc::Sender<()>>,
|
||||
#[allow(dead_code)]
|
||||
unpark_tx: mpsc::SyncSender<()>,
|
||||
}
|
||||
|
||||
impl Unpark for MyUnpark {
|
||||
fn unpark(&self) {
|
||||
let _ = self.tx.lock().unwrap().send(());
|
||||
}
|
||||
}
|
||||
|
||||
let (task_tx, task_rx) = mpsc::channel();
|
||||
let (drop_tx, drop_rx) = mpsc::channel();
|
||||
let (park_tx, park_rx) = mpsc::sync_channel(0);
|
||||
let (unpark_tx, unpark_rx) = mpsc::sync_channel(0);
|
||||
|
||||
let pool = Builder::new().num_threads(4).build_with_park(move |_| {
|
||||
let (tx, rx) = mpsc::channel();
|
||||
MyPark {
|
||||
tx: Mutex::new(tx),
|
||||
rx,
|
||||
park_tx: park_tx.clone(),
|
||||
unpark_tx: unpark_tx.clone(),
|
||||
}
|
||||
});
|
||||
|
||||
struct MyTask {
|
||||
task_tx: Option<mpsc::Sender<Waker>>,
|
||||
drop_tx: mpsc::Sender<()>,
|
||||
}
|
||||
|
||||
impl Future for MyTask {
|
||||
type Output = ();
|
||||
|
||||
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
|
||||
if let Some(tx) = self.get_mut().task_tx.take() {
|
||||
tx.send(cx.waker().clone()).unwrap();
|
||||
}
|
||||
|
||||
Poll::Pending
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for MyTask {
|
||||
fn drop(&mut self) {
|
||||
self.drop_tx.send(()).unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
pool.spawn(MyTask {
|
||||
task_tx: Some(task_tx),
|
||||
drop_tx,
|
||||
});
|
||||
|
||||
// Wait until we get the task handle.
|
||||
let task = task_rx.recv().unwrap();
|
||||
|
||||
// Drop the pool, this should result in futures being forcefully dropped.
|
||||
drop(pool);
|
||||
|
||||
// Make sure `MyPark` and `MyUnpark` were dropped during shutdown.
|
||||
assert_eq!(park_rx.try_recv(), Err(mpsc::TryRecvError::Disconnected));
|
||||
assert_eq!(unpark_rx.try_recv(), Err(mpsc::TryRecvError::Disconnected));
|
||||
|
||||
// If the future is forcefully dropped, then we will get a signal here.
|
||||
drop_rx.recv().unwrap();
|
||||
|
||||
// Ensure `task` lives until after the test completes.
|
||||
drop(task);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn park_called_at_interval() {
|
||||
struct MyPark {
|
||||
park_light: Arc<AtomicBool>,
|
||||
}
|
||||
|
||||
struct MyUnpark {}
|
||||
|
||||
impl Park for MyPark {
|
||||
type Unpark = MyUnpark;
|
||||
type Error = ();
|
||||
|
||||
fn unpark(&self) -> Self::Unpark {
|
||||
MyUnpark {}
|
||||
}
|
||||
|
||||
fn park(&mut self) -> Result<(), Self::Error> {
|
||||
use std::thread;
|
||||
use std::time::Duration;
|
||||
|
||||
thread::sleep(Duration::from_millis(1));
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn park_timeout(&mut self, duration: Duration) -> Result<(), Self::Error> {
|
||||
if duration == Duration::from_millis(0) {
|
||||
self.park_light.store(true, Relaxed);
|
||||
Ok(())
|
||||
} else {
|
||||
self.park()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Unpark for MyUnpark {
|
||||
fn unpark(&self) {}
|
||||
}
|
||||
|
||||
let park_light_1 = Arc::new(AtomicBool::new(false));
|
||||
let park_light_2 = park_light_1.clone();
|
||||
|
||||
let (done_tx, done_rx) = mpsc::channel();
|
||||
|
||||
// Use 1 thread to ensure the worker stays busy.
|
||||
let pool = Builder::new().num_threads(1).build_with_park(move |idx| {
|
||||
assert_eq!(idx, 0);
|
||||
MyPark {
|
||||
park_light: park_light_2.clone(),
|
||||
}
|
||||
});
|
||||
|
||||
let mut cnt = 0;
|
||||
|
||||
pool.spawn(poll_fn(move |cx| {
|
||||
let did_park_light = park_light_1.load(Relaxed);
|
||||
|
||||
if did_park_light {
|
||||
// There is a bit of a race where the worker can tick a few times
|
||||
// before seeing the task
|
||||
assert!(cnt > 50);
|
||||
done_tx.send(()).unwrap();
|
||||
return Poll::Ready(());
|
||||
}
|
||||
|
||||
cnt += 1;
|
||||
|
||||
cx.waker().wake_by_ref();
|
||||
Poll::Pending
|
||||
}));
|
||||
|
||||
done_rx.recv().unwrap();
|
||||
}
|
||||
|
||||
fn new_pool() -> ThreadPool {
|
||||
Builder::new().num_threads(4).build()
|
||||
}
|
||||
@@ -1,11 +1,9 @@
|
||||
#![warn(rust_2018_idioms)]
|
||||
|
||||
use tokio::executor::current_thread::CurrentThread;
|
||||
use tokio::executor::park::{Park, Unpark, UnparkThread};
|
||||
use tokio::timer::{Delay, Timer};
|
||||
|
||||
use tokio_executor::current_thread::CurrentThread;
|
||||
use tokio_executor::park::{Park, Unpark, UnparkThread};
|
||||
|
||||
use rand;
|
||||
use rand::Rng;
|
||||
use std::cmp;
|
||||
use std::future::Future;
|
||||
|
||||
Reference in New Issue
Block a user