mirror of
https://github.com/denoland/deno.git
synced 2024-11-21 15:04:11 -05:00
122 lines
3.7 KiB
Rust
122 lines
3.7 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
use std::fmt::Debug;
|
|
use std::str::FromStr;
|
|
|
|
use deno_core::unsync::MaskFutureAsSend;
|
|
#[cfg(tokio_unstable)]
|
|
use tokio_metrics::RuntimeMonitor;
|
|
|
|
/// Default configuration for tokio. In the future, this method may have different defaults
|
|
/// depending on the platform and/or CPU layout.
|
|
const fn tokio_configuration() -> (u32, u32, usize) {
|
|
(61, 31, 1024)
|
|
}
|
|
|
|
fn tokio_env<T: FromStr>(name: &'static str, default: T) -> T
|
|
where
|
|
<T as FromStr>::Err: Debug,
|
|
{
|
|
match std::env::var(name) {
|
|
Ok(value) => value.parse().unwrap(),
|
|
Err(_) => default,
|
|
}
|
|
}
|
|
|
|
pub fn create_basic_runtime() -> tokio::runtime::Runtime {
|
|
let (event_interval, global_queue_interval, max_io_events_per_tick) =
|
|
tokio_configuration();
|
|
|
|
tokio::runtime::Builder::new_current_thread()
|
|
.enable_io()
|
|
.enable_time()
|
|
.event_interval(tokio_env("DENO_TOKIO_EVENT_INTERVAL", event_interval))
|
|
.global_queue_interval(tokio_env(
|
|
"DENO_TOKIO_GLOBAL_QUEUE_INTERVAL",
|
|
global_queue_interval,
|
|
))
|
|
.max_io_events_per_tick(tokio_env(
|
|
"DENO_TOKIO_MAX_IO_EVENTS_PER_TICK",
|
|
max_io_events_per_tick,
|
|
))
|
|
// This limits the number of threads for blocking operations (like for
|
|
// synchronous fs ops) or CPU bound tasks like when we run dprint in
|
|
// parallel for deno fmt.
|
|
// The default value is 512, which is an unhelpfully large thread pool. We
|
|
// don't ever want to have more than a couple dozen threads.
|
|
.max_blocking_threads(32)
|
|
.build()
|
|
.unwrap()
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn create_and_run_current_thread_inner<F, R>(
|
|
future: F,
|
|
metrics_enabled: bool,
|
|
) -> R
|
|
where
|
|
F: std::future::Future<Output = R> + 'static,
|
|
R: Send + 'static,
|
|
{
|
|
let rt = create_basic_runtime();
|
|
|
|
// Since this is the main future, we want to box it in debug mode because it tends to be fairly
|
|
// large and the compiler won't optimize repeated copies. We also make this runtime factory
|
|
// function #[inline(always)] to avoid holding the unboxed, unused future on the stack.
|
|
|
|
#[cfg(debug_assertions)]
|
|
// SAFETY: this this is guaranteed to be running on a current-thread executor
|
|
let future = Box::pin(unsafe { MaskFutureAsSend::new(future) });
|
|
|
|
#[cfg(not(debug_assertions))]
|
|
// SAFETY: this this is guaranteed to be running on a current-thread executor
|
|
let future = unsafe { MaskFutureAsSend::new(future) };
|
|
|
|
#[cfg(tokio_unstable)]
|
|
let join_handle = if metrics_enabled {
|
|
rt.spawn(async move {
|
|
let metrics_interval: u64 = std::env::var("DENO_TOKIO_METRICS_INTERVAL")
|
|
.ok()
|
|
.and_then(|val| val.parse().ok())
|
|
.unwrap_or(1000);
|
|
let handle = tokio::runtime::Handle::current();
|
|
let runtime_monitor = RuntimeMonitor::new(&handle);
|
|
tokio::spawn(async move {
|
|
for interval in runtime_monitor.intervals() {
|
|
println!("{:#?}", interval);
|
|
// wait 500ms
|
|
tokio::time::sleep(std::time::Duration::from_millis(
|
|
metrics_interval,
|
|
))
|
|
.await;
|
|
}
|
|
});
|
|
future.await
|
|
})
|
|
} else {
|
|
rt.spawn(future)
|
|
};
|
|
|
|
#[cfg(not(tokio_unstable))]
|
|
let join_handle = rt.spawn(future);
|
|
|
|
rt.block_on(join_handle).unwrap().into_inner()
|
|
}
|
|
|
|
#[inline(always)]
|
|
pub fn create_and_run_current_thread<F, R>(future: F) -> R
|
|
where
|
|
F: std::future::Future<Output = R> + 'static,
|
|
R: Send + 'static,
|
|
{
|
|
create_and_run_current_thread_inner(future, false)
|
|
}
|
|
|
|
#[inline(always)]
|
|
pub fn create_and_run_current_thread_with_maybe_metrics<F, R>(future: F) -> R
|
|
where
|
|
F: std::future::Future<Output = R> + 'static,
|
|
R: Send + 'static,
|
|
{
|
|
let metrics_enabled = std::env::var("DENO_TOKIO_METRICS").ok().is_some();
|
|
create_and_run_current_thread_inner(future, metrics_enabled)
|
|
}
|