mirror of
https://github.com/denoland/deno.git
synced 2024-12-23 15:49:44 -05:00
refactor: move timers to deno_timers op crate (#10179)
Move timers out of runtime/ and into a standalone op crate.
This commit is contained in:
parent
83f6d4bf94
commit
5214acd3d9
10 changed files with 257 additions and 159 deletions
9
Cargo.lock
generated
9
Cargo.lock
generated
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@ -674,6 +674,7 @@ dependencies = [
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"deno_crypto",
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"deno_fetch",
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"deno_file",
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"deno_timers",
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"deno_url",
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"deno_web",
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"deno_webgpu",
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@ -710,6 +711,14 @@ dependencies = [
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"winres",
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]
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[[package]]
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name = "deno_timers"
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version = "0.1.0"
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dependencies = [
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"deno_core",
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"tokio",
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]
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[[package]]
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name = "deno_url"
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version = "0.3.0"
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@ -10,6 +10,7 @@ members = [
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"test_util",
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"op_crates/crypto",
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"op_crates/fetch",
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"op_crates/timers",
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"op_crates/url",
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"op_crates/web",
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"op_crates/webgpu",
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@ -2,9 +2,27 @@
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"use strict";
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((window) => {
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const assert = window.__bootstrap.util.assert;
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const core = window.Deno.core;
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// Shamelessly cribbed from op_crates/fetch/11_streams.js
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class AssertionError extends Error {
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constructor(msg) {
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super(msg);
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this.name = "AssertionError";
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}
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}
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/**
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* @param {unknown} cond
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* @param {string=} msg
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* @returns {asserts cond}
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*/
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function assert(cond, msg = "Assertion failed.") {
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if (!cond) {
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throw new AssertionError(msg);
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}
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}
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function opStopGlobalTimer() {
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core.opSync("op_global_timer_stop");
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}
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18
op_crates/timers/Cargo.toml
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18
op_crates/timers/Cargo.toml
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@ -0,0 +1,18 @@
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# Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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[package]
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name = "deno_timers"
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version = "0.1.0"
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edition = "2018"
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description = "Timers API implementation for Deno"
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authors = ["the Deno authors"]
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license = "MIT"
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readme = "README.md"
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repository = "https://github.com/denoland/deno"
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[lib]
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path = "lib.rs"
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[dependencies]
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deno_core = { version = "0.84.0", path = "../../core" }
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tokio = { version = "1.4.0", features = ["full"] }
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5
op_crates/timers/README.md
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5
op_crates/timers/README.md
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@ -0,0 +1,5 @@
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# deno_timers
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This crate implements the timers API.
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Spec: https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
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165
op_crates/timers/lib.rs
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165
op_crates/timers/lib.rs
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@ -0,0 +1,165 @@
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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//! This module helps deno implement timers.
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//!
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//! As an optimization, we want to avoid an expensive calls into rust for every
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//! setTimeout in JavaScript. Thus in //js/timers.ts a data structure is
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//! implemented that calls into Rust for only the smallest timeout. Thus we
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//! only need to be able to start, cancel and await a single timer (or Delay, as Tokio
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//! calls it) for an entire Isolate. This is what is implemented here.
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use deno_core::error::AnyError;
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use deno_core::futures;
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use deno_core::futures::channel::oneshot;
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use deno_core::futures::FutureExt;
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use deno_core::futures::TryFutureExt;
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use deno_core::OpState;
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use deno_core::ZeroCopyBuf;
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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::thread::sleep;
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use std::time::Duration;
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use std::time::Instant;
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pub trait TimersPermission {
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fn allow_hrtime(&mut self) -> bool;
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fn check_unstable(&self, state: &OpState, api_name: &'static str);
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}
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pub fn init(rt: &mut deno_core::JsRuntime) {
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rt.execute(
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"deno:op_crates/timers/01_timers.js",
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include_str!("01_timers.js"),
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)
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.unwrap();
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}
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pub type StartTime = Instant;
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type TimerFuture = Pin<Box<dyn Future<Output = Result<(), ()>>>>;
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#[derive(Default)]
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pub struct GlobalTimer {
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tx: Option<oneshot::Sender<()>>,
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pub future: Option<TimerFuture>,
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}
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impl GlobalTimer {
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pub fn cancel(&mut self) {
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if let Some(tx) = self.tx.take() {
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tx.send(()).ok();
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}
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}
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pub fn new_timeout(&mut self, deadline: Instant) {
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if self.tx.is_some() {
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self.cancel();
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}
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assert!(self.tx.is_none());
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self.future.take();
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let (tx, rx) = oneshot::channel();
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self.tx = Some(tx);
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let delay = tokio::time::sleep_until(deadline.into()).boxed_local();
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let rx = rx
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.map_err(|err| panic!("Unexpected error in receiving channel {:?}", err));
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let fut = futures::future::select(delay, rx)
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.then(|_| futures::future::ok(()))
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.boxed_local();
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self.future = Some(fut);
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}
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}
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#[allow(clippy::unnecessary_wraps)]
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pub fn op_global_timer_stop(
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state: &mut OpState,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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let global_timer = state.borrow_mut::<GlobalTimer>();
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global_timer.cancel();
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Ok(())
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}
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// Set up a timer that will be later awaited by JS promise.
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// It's a separate op, because canceling a timeout immediately
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// after setting it caused a race condition (because Tokio timeout)
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// might have been registered after next event loop tick.
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//
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// See https://github.com/denoland/deno/issues/7599 for more
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// details.
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#[allow(clippy::unnecessary_wraps)]
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pub fn op_global_timer_start(
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state: &mut OpState,
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timeout: u64,
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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let deadline = Instant::now() + Duration::from_millis(timeout);
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let global_timer = state.borrow_mut::<GlobalTimer>();
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global_timer.new_timeout(deadline);
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Ok(())
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}
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pub async fn op_global_timer(
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state: Rc<RefCell<OpState>>,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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let maybe_timer_fut = {
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let mut s = state.borrow_mut();
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let global_timer = s.borrow_mut::<GlobalTimer>();
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global_timer.future.take()
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};
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if let Some(timer_fut) = maybe_timer_fut {
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let _ = timer_fut.await;
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}
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Ok(())
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}
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// Returns a milliseconds and nanoseconds subsec
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// since the start time of the deno runtime.
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// If the High precision flag is not set, the
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// nanoseconds are rounded on 2ms.
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#[allow(clippy::unnecessary_wraps)]
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pub fn op_now<TP>(
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state: &mut OpState,
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_argument: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<f64, AnyError>
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where
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TP: TimersPermission + 'static,
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{
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let start_time = state.borrow::<StartTime>();
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let seconds = start_time.elapsed().as_secs();
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let mut subsec_nanos = start_time.elapsed().subsec_nanos() as f64;
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let reduced_time_precision = 2_000_000.0; // 2ms in nanoseconds
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// If the permission is not enabled
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// Round the nano result on 2 milliseconds
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// see: https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#Reduced_time_precision
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if !state.borrow_mut::<TP>().allow_hrtime() {
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subsec_nanos -= subsec_nanos % reduced_time_precision;
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}
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let result = (seconds * 1_000) as f64 + (subsec_nanos / 1_000_000.0);
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Ok(result)
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}
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#[allow(clippy::unnecessary_wraps)]
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pub fn op_sleep_sync<TP>(
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state: &mut OpState,
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millis: u64,
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError>
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where
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TP: TimersPermission + 'static,
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{
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state.borrow::<TP>().check_unstable(state, "Deno.sleepSync");
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sleep(Duration::from_millis(millis));
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Ok(())
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}
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@ -18,32 +18,34 @@ name = "hello_runtime"
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path = "examples/hello_runtime.rs"
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[build-dependencies]
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deno_core = { path = "../core", version = "0.84.0" }
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deno_console = { path = "../op_crates/console", version = "0.3.0" }
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deno_core = { path = "../core", version = "0.84.0" }
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deno_crypto = { path = "../op_crates/crypto", version = "0.17.0" }
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deno_fetch = { path = "../op_crates/fetch", version = "0.25.0" }
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deno_file = { path = "../op_crates/file", version = "0.2.0" }
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deno_web = { path = "../op_crates/web", version = "0.33.0" }
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deno_timers = { path = "../op_crates/timers", version = "0.1.0" }
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deno_url = { path = "../op_crates/url", version = "0.3.0" }
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deno_web = { path = "../op_crates/web", version = "0.33.0" }
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deno_webgpu = { path = "../op_crates/webgpu", version = "0.4.0" }
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deno_webidl = { path = "../op_crates/webidl", version = "0.3.0" }
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deno_websocket = { path = "../op_crates/websocket", version = "0.8.0" }
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deno_webgpu = { path = "../op_crates/webgpu", version = "0.4.0" }
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[target.'cfg(windows)'.build-dependencies]
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winres = "0.1.11"
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winapi = "0.3.9"
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[dependencies]
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deno_core = { path = "../core", version = "0.84.0" }
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deno_console = { path = "../op_crates/console", version = "0.3.0" }
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deno_core = { path = "../core", version = "0.84.0" }
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deno_crypto = { path = "../op_crates/crypto", version = "0.17.0" }
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deno_fetch = { path = "../op_crates/fetch", version = "0.25.0" }
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deno_file = { path = "../op_crates/file", version = "0.2.0" }
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deno_web = { path = "../op_crates/web", version = "0.33.0" }
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deno_timers = { path = "../op_crates/timers", version = "0.1.0" }
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deno_url = { path = "../op_crates/url", version = "0.3.0" }
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deno_web = { path = "../op_crates/web", version = "0.33.0" }
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deno_webgpu = { path = "../op_crates/webgpu", version = "0.4.0" }
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deno_webidl = { path = "../op_crates/webidl", version = "0.3.0" }
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deno_websocket = { path = "../op_crates/websocket", version = "0.8.0" }
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deno_webgpu = { path = "../op_crates/webgpu", version = "0.4.0" }
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atty = "0.2.14"
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bytes = "1"
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@ -13,8 +13,10 @@ fn create_snapshot(
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snapshot_path: &Path,
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files: Vec<PathBuf>,
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) {
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// Initialization order matters.
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deno_webidl::init(&mut js_runtime);
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deno_console::init(&mut js_runtime);
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deno_timers::init(&mut js_runtime);
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deno_url::init(&mut js_runtime);
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deno_web::init(&mut js_runtime);
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deno_file::init(&mut js_runtime);
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|
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@ -1,161 +1,28 @@
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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//! This module helps deno implement timers.
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//!
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//! As an optimization, we want to avoid an expensive calls into rust for every
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//! setTimeout in JavaScript. Thus in //js/timers.ts a data structure is
|
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//! implemented that calls into Rust for only the smallest timeout. Thus we
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//! only need to be able to start, cancel and await a single timer (or Delay, as Tokio
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//! calls it) for an entire Isolate. This is what is implemented here.
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use crate::permissions::Permissions;
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use deno_core::error::AnyError;
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use deno_core::futures;
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use deno_core::futures::channel::oneshot;
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use deno_core::futures::FutureExt;
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use deno_core::futures::TryFutureExt;
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use deno_core::OpState;
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use deno_core::ZeroCopyBuf;
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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::thread::sleep;
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use std::time::Duration;
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use std::time::Instant;
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pub type StartTime = Instant;
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type TimerFuture = Pin<Box<dyn Future<Output = Result<(), ()>>>>;
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#[derive(Default)]
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pub struct GlobalTimer {
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tx: Option<oneshot::Sender<()>>,
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pub future: Option<TimerFuture>,
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}
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impl GlobalTimer {
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pub fn cancel(&mut self) {
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if let Some(tx) = self.tx.take() {
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tx.send(()).ok();
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}
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}
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pub fn new_timeout(&mut self, deadline: Instant) {
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if self.tx.is_some() {
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self.cancel();
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}
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assert!(self.tx.is_none());
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self.future.take();
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let (tx, rx) = oneshot::channel();
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self.tx = Some(tx);
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let delay = tokio::time::sleep_until(deadline.into()).boxed_local();
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let rx = rx
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.map_err(|err| panic!("Unexpected error in receiving channel {:?}", err));
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|
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let fut = futures::future::select(delay, rx)
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.then(|_| futures::future::ok(()))
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.boxed_local();
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self.future = Some(fut);
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}
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}
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pub fn init(rt: &mut deno_core::JsRuntime) {
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{
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let op_state = rt.op_state();
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let mut state = op_state.borrow_mut();
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state.put::<GlobalTimer>(GlobalTimer::default());
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state.put::<StartTime>(StartTime::now());
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state.put(deno_timers::GlobalTimer::default());
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state.put(deno_timers::StartTime::now());
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}
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super::reg_sync(rt, "op_global_timer_stop", op_global_timer_stop);
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super::reg_sync(rt, "op_global_timer_start", op_global_timer_start);
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super::reg_async(rt, "op_global_timer", op_global_timer);
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super::reg_sync(rt, "op_now", op_now);
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super::reg_sync(rt, "op_sleep_sync", op_sleep_sync);
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}
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#[allow(clippy::unnecessary_wraps)]
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fn op_global_timer_stop(
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state: &mut OpState,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
|
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) -> Result<(), AnyError> {
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let global_timer = state.borrow_mut::<GlobalTimer>();
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global_timer.cancel();
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Ok(())
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}
|
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|
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// Set up a timer that will be later awaited by JS promise.
|
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// It's a separate op, because canceling a timeout immediately
|
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// after setting it caused a race condition (because Tokio timeout)
|
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// might have been registered after next event loop tick.
|
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//
|
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// See https://github.com/denoland/deno/issues/7599 for more
|
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// details.
|
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#[allow(clippy::unnecessary_wraps)]
|
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fn op_global_timer_start(
|
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state: &mut OpState,
|
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timeout: u64,
|
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_zero_copy: Option<ZeroCopyBuf>,
|
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) -> Result<(), AnyError> {
|
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let deadline = Instant::now() + Duration::from_millis(timeout);
|
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let global_timer = state.borrow_mut::<GlobalTimer>();
|
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global_timer.new_timeout(deadline);
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Ok(())
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}
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|
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async fn op_global_timer(
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state: Rc<RefCell<OpState>>,
|
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_args: (),
|
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_zero_copy: Option<ZeroCopyBuf>,
|
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) -> Result<(), AnyError> {
|
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let maybe_timer_fut = {
|
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let mut s = state.borrow_mut();
|
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let global_timer = s.borrow_mut::<GlobalTimer>();
|
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global_timer.future.take()
|
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};
|
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if let Some(timer_fut) = maybe_timer_fut {
|
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let _ = timer_fut.await;
|
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}
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Ok(())
|
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}
|
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|
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// Returns a milliseconds and nanoseconds subsec
|
||||
// since the start time of the deno runtime.
|
||||
// If the High precision flag is not set, the
|
||||
// nanoseconds are rounded on 2ms.
|
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#[allow(clippy::unnecessary_wraps)]
|
||||
fn op_now(
|
||||
op_state: &mut OpState,
|
||||
_argument: (),
|
||||
_zero_copy: Option<ZeroCopyBuf>,
|
||||
) -> Result<f64, AnyError> {
|
||||
let start_time = op_state.borrow::<StartTime>();
|
||||
let seconds = start_time.elapsed().as_secs();
|
||||
let mut subsec_nanos = start_time.elapsed().subsec_nanos() as f64;
|
||||
let reduced_time_precision = 2_000_000.0; // 2ms in nanoseconds
|
||||
|
||||
// If the permission is not enabled
|
||||
// Round the nano result on 2 milliseconds
|
||||
// see: https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#Reduced_time_precision
|
||||
if op_state.borrow_mut::<Permissions>().hrtime.check().is_err() {
|
||||
subsec_nanos -= subsec_nanos % reduced_time_precision;
|
||||
}
|
||||
|
||||
let result = (seconds * 1_000) as f64 + (subsec_nanos / 1_000_000.0);
|
||||
|
||||
Ok(result)
|
||||
}
|
||||
|
||||
#[allow(clippy::unnecessary_wraps)]
|
||||
fn op_sleep_sync(
|
||||
state: &mut OpState,
|
||||
millis: u64,
|
||||
_zero_copy: Option<ZeroCopyBuf>,
|
||||
) -> Result<(), AnyError> {
|
||||
super::check_unstable(state, "Deno.sleepSync");
|
||||
sleep(Duration::from_millis(millis));
|
||||
Ok(())
|
||||
super::reg_sync(
|
||||
rt,
|
||||
"op_global_timer_stop",
|
||||
deno_timers::op_global_timer_stop,
|
||||
);
|
||||
super::reg_sync(
|
||||
rt,
|
||||
"op_global_timer_start",
|
||||
deno_timers::op_global_timer_start,
|
||||
);
|
||||
super::reg_async(rt, "op_global_timer", deno_timers::op_global_timer);
|
||||
super::reg_sync(rt, "op_now", deno_timers::op_now::<Permissions>);
|
||||
super::reg_sync(
|
||||
rt,
|
||||
"op_sleep_sync",
|
||||
deno_timers::op_sleep_sync::<Permissions>,
|
||||
);
|
||||
}
|
||||
|
|
|
@ -9,6 +9,7 @@ use deno_core::serde::Deserialize;
|
|||
use deno_core::serde::Serialize;
|
||||
use deno_core::url;
|
||||
use deno_core::ModuleSpecifier;
|
||||
use deno_core::OpState;
|
||||
use log::debug;
|
||||
use std::collections::HashSet;
|
||||
use std::fmt;
|
||||
|
@ -968,6 +969,16 @@ impl deno_fetch::FetchPermissions for Permissions {
|
|||
}
|
||||
}
|
||||
|
||||
impl deno_timers::TimersPermission for Permissions {
|
||||
fn allow_hrtime(&mut self) -> bool {
|
||||
self.hrtime.check().is_ok()
|
||||
}
|
||||
|
||||
fn check_unstable(&self, state: &OpState, api_name: &'static str) {
|
||||
crate::ops::check_unstable(state, api_name);
|
||||
}
|
||||
}
|
||||
|
||||
impl deno_websocket::WebSocketPermissions for Permissions {
|
||||
fn check_net_url(&mut self, url: &url::Url) -> Result<(), AnyError> {
|
||||
self.net.check_url(url)
|
||||
|
|
Loading…
Reference in a new issue