/build/source/nativelink-util/src/task.rs

Source
// Copyright 2024 The NativeLink Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use core::pin::Pin;
use core::task::{Context as TaskContext, Poll};

use futures::Future;
use hyper::rt::Executor;
use hyper_util::rt::tokio::TokioExecutor;
use opentelemetry::context::{Context, FutureExt};
use tokio::task::{JoinError, JoinHandle, spawn_blocking};
pub use tracing::error_span as __error_span;
use tracing::{Instrument, Span};

pub fn __spawn_with_span_and_context<F, T>(f: F, span: Span, ctx: Option<Context>) -> JoinHandle<T>
where
    T: Send + 'static,
    F: Future<Output = T> + Send + 'static,
{
    let future = f.instrument(span);
    let future = if let Some(ctx) = ctx {
        future.with_context(ctx)
    } else {
        future.with_current_context()
    };

    #[expect(clippy::disallowed_methods, reason = "purpose of the method")]
    tokio::spawn(future)
}

pub fn __spawn_with_span<F, T>(f: F, span: Span) -> JoinHandle<T>
where
    T: Send + 'static,
    F: Future<Output = T> + Send + 'static,
{
    let current_ctx = Context::current();
    __spawn_with_span_and_context(f, span, Some(current_ctx))
}

pub fn __spawn_blocking<F, T>(f: F, span: Span) -> JoinHandle<T>
where
    F: FnOnce() -> T + Send + 'static,
    T: Send + 'static,
{
    #[expect(clippy::disallowed_methods, reason = "purpose of the method")]
    spawn_blocking(move || span.in_scope(f))
}

#[macro_export]
macro_rules! background_spawn {
    ($name:expr, $fut:expr) => {{
        $crate::task::__spawn_with_span($fut, $crate::task::__error_span!($name))
    }};
    ($name:expr, $fut:expr, $($fields:tt)*) => {{
        $crate::task::__spawn_with_span($fut, $crate::task::__error_span!($name, $($fields)*))
    }};
    (name: $name:expr, fut: $fut:expr, target: $target:expr, $($fields:tt)*) => {{
        $crate::task::__spawn_with_span($fut, $crate::task::__error_span!(target: $target, $name, $($fields)*))
    }};
    (span: $span:expr, ctx: $ctx:expr, fut: $fut:expr) => {{
        $crate::task::__spawn_with_span_and_context($fut, $span, $ctx)
    }};
}

#[macro_export]
macro_rules! spawn {
    ($name:expr, $fut:expr) => {{
        $crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut))
    }};
    ($name:expr, $fut:expr, $($fields:tt)*) => {{
        $crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut, $($fields)*))
    }};
    (name: $name:expr, fut: $fut:expr, target: $target:expr, $($fields:tt)*) => {{
        $crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut, target: $target, $($fields)*))
    }};
}

#[macro_export]
macro_rules! spawn_blocking {
    ($name:expr, $fut:expr) => {{
        $crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!($name)))
    }};
    ($name:expr, $fut:expr, $($fields:tt)*) => {{
        $crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!($name, $($fields)*)))
    }};
    ($name:expr, $fut:expr, target: $target:expr) => {{
        $crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!(target: $target, $name)))
    }};
    ($name:expr, $fut:expr, target: $target:expr, $($fields:tt)*) => {{
        $crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!(target: $target, $name, $($fields)*)))
    }};
}

/// Simple wrapper that will abort a future that is running in another spawn in the
/// event that this handle gets dropped.
#[derive(Debug)]
#[must_use]
pub struct JoinHandleDropGuard<T> {
    inner: JoinHandle<T>,
}

impl<T> JoinHandleDropGuard<T> {
    pub const fn new(inner: JoinHandle<T>) -> Self {
        Self { inner }
    }
}

impl<T> Future for JoinHandleDropGuard<T> {
    type Output = Result<T, JoinError>;

    fn poll(mut self: Pin<&mut Self>, cx: &mut TaskContext<'_>) -> Poll<Self::Output> {
        Pin::new(&mut self.inner).poll(cx)
    }
}

impl<T> Drop for JoinHandleDropGuard<T> {
    fn drop(&mut self) {
        self.inner.abort();
    }
}

#[derive(Debug, Clone)]
pub struct TaskExecutor(TokioExecutor);

impl TaskExecutor {
    pub fn new() -> Self {
        Self(TokioExecutor::new())
    }
}

impl Default for TaskExecutor {
    fn default() -> Self {
        Self::new()
    }
}

impl<F> Executor<F> for TaskExecutor
where
    F: Future + Send + 'static,
    F::Output: Send + 'static,
{
    fn execute(&self, fut: F) {
        background_spawn!("http_executor", fut);
    }
}

Line	Count	Source
1		// Copyright 2024 The NativeLink Authors. All rights reserved.
2		//
3		// Licensed under the Apache License, Version 2.0 (the "License");
4		// you may not use this file except in compliance with the License.
5		// You may obtain a copy of the License at
6		//
7		// http://www.apache.org/licenses/LICENSE-2.0
8		//
9		// Unless required by applicable law or agreed to in writing, software
10		// distributed under the License is distributed on an "AS IS" BASIS,
11		// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12		// See the License for the specific language governing permissions and
13		// limitations under the License.
14
15		use core::pin::Pin;
16		use core::task::{Context as TaskContext, Poll};
17
18		use futures::Future;
19		use hyper::rt::Executor;
20		use hyper_util::rt::tokio::TokioExecutor;
21		use opentelemetry::context::{Context, FutureExt};
22		use tokio::task::{JoinError, JoinHandle, spawn_blocking};
23		pub use tracing::error_span as __error_span;
24		use tracing::{Instrument, Span};
25
26	1.53k	pub fn __spawn_with_span_and_context<F, T>(f: F, span: Span, ctx: Option<Context>) -> JoinHandle<T>
27	1.53k	where
28	1.53k	T: Send + 'static,
29	1.53k	F: Future<Output = T> + Send + 'static,
30		{
31	1.53k	let future = f.instrument(span);
32	1.53k	let future = if let Some(ctx) = ctx { Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 28, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 7, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 6, False: 0] Branch (32:25): [True: 1.22k, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 26, False: 0] Branch (32:25): [Folded - Ignored] Branch (32:25): [True: 7, False: 0] Branch (32:25): [True: 2, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 13, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 2, False: 0] Branch (32:25): [True: 2, False: 0] Branch (32:25): [True: 2, False: 0] Branch (32:25): [True: 2, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 15, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 4, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 6, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [Folded - Ignored] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 0, False: 0] Branch (32:25): [True: 13, False: 0] Branch (32:25): [True: 13, False: 0] Branch (32:25): [True: 93, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 1, False: 0] Branch (32:25): [True: 20, False: 0] Branch (32:25): [True: 1, False: 0]
33	1.53k	future.with_context(ctx)
34		} else {
35	0	future.with_current_context()
36		};
37
38		#[expect(clippy::disallowed_methods, reason = "purpose of the method")]
39	1.53k	tokio::spawn(future)
40	1.53k	}
41
42	1.53k	pub fn __spawn_with_span<F, T>(f: F, span: Span) -> JoinHandle<T>
43	1.53k	where
44	1.53k	T: Send + 'static,
45	1.53k	F: Future<Output = T> + Send + 'static,
46		{
47	1.53k	let current_ctx = Context::current();
48	1.53k	__spawn_with_span_and_context(f, span, Some(current_ctx))
49	1.53k	}
50
51	734	pub fn __spawn_blocking<F, T>(f: F, span: Span) -> JoinHandle<T>
52	734	where
53	734	F: FnOnce() -> T + Send + 'static,
54	734	T: Send + 'static,
55		{
56		#[expect(clippy::disallowed_methods, reason = "purpose of the method")]
57	734	spawn_blocking(move \|\| span.in_scope(f))
58	734	}
59
60		#[macro_export]
61		macro_rules! background_spawn {
62		($name:expr, $fut:expr) => {{
63		$crate::task::__spawn_with_span($fut, $crate::task::__error_span!($name))
64		}};
65		($name:expr, $fut:expr, $($fields:tt)*) => {{
66		$crate::task::__spawn_with_span($fut, $crate::task::__error_span!($name, $($fields)*))
67		}};
68		(name: $name:expr, fut: $fut:expr, target: $target:expr, $($fields:tt)*) => {{
69		$crate::task::__spawn_with_span($fut, $crate::task::__error_span!(target: $target, $name, $($fields)*))
70		}};
71		(span: $span:expr, ctx: $ctx:expr, fut: $fut:expr) => {{
72		$crate::task::__spawn_with_span_and_context($fut, $span, $ctx)
73		}};
74		}
75
76		#[macro_export]
77		macro_rules! spawn {
78		($name:expr, $fut:expr) => {{
79		$crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut))
80		}};
81		($name:expr, $fut:expr, $($fields:tt)*) => {{
82		$crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut, $($fields)*))
83		}};
84		(name: $name:expr, fut: $fut:expr, target: $target:expr, $($fields:tt)*) => {{
85		$crate::task::JoinHandleDropGuard::new($crate::background_spawn!($name, $fut, target: $target, $($fields)*))
86		}};
87		}
88
89		#[macro_export]
90		macro_rules! spawn_blocking {
91		($name:expr, $fut:expr) => {{
92		$crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!($name)))
93		}};
94		($name:expr, $fut:expr, $($fields:tt)*) => {{
95		$crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!($name, $($fields)*)))
96		}};
97		($name:expr, $fut:expr, target: $target:expr) => {{
98		$crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!(target: $target, $name)))
99		}};
100		($name:expr, $fut:expr, target: $target:expr, $($fields:tt)*) => {{
101		$crate::task::JoinHandleDropGuard::new($crate::task::__spawn_blocking($fut, $crate::task::__error_span!(target: $target, $name, $($fields)*)))
102		}};
103		}
104
105		/// Simple wrapper that will abort a future that is running in another spawn in the
106		/// event that this handle gets dropped.
107		#[derive(Debug)]
108		#[must_use]
109		pub struct JoinHandleDropGuard<T> {
110		inner: JoinHandle<T>,
111		}
112
113		impl<T> JoinHandleDropGuard<T> {
114	2.11k	pub const fn new(inner: JoinHandle<T>) -> Self {
115	2.11k	Self { inner }
116	2.11k	}
117		}
118
119		impl<T> Future for JoinHandleDropGuard<T> {
120		type Output = Result<T, JoinError>;
121
122	4.10k	fn poll(mut self: Pin<&mut Self>, cx: &mut TaskContext<'_>) -> Poll<Self::Output> {
123	4.10k	Pin::new(&mut self.inner).poll(cx)
124	4.10k	}
125		}
126
127		impl<T> Drop for JoinHandleDropGuard<T> {
128	2.11k	fn drop(&mut self) {
129	2.11k	self.inner.abort();
130	2.11k	}
131		}
132
133		#[derive(Debug, Clone)]
134		pub struct TaskExecutor(TokioExecutor);
135
136		impl TaskExecutor {
137	0	pub fn new() -> Self {
138	0	Self(TokioExecutor::new())
139	0	}
140		}
141
142		impl Default for TaskExecutor {
143	0	fn default() -> Self {
144	0	Self::new()
145	0	}
146		}
147
148		impl<F> Executor<F> for TaskExecutor
149		where
150		F: Future + Send + 'static,
151		F::Output: Send + 'static,
152		{
153	0	fn execute(&self, fut: F) {
154	0	background_spawn!("http_executor", fut);
155	0	}
156		}

Coverage Report

Created: 2025-06-24 08:57