| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/tokio-377c595163f99a10/dfe252d/tokio/src/util/trace.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>trace.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../tokio/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../tokio/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="macro">cfg_trace! </span>{ |
| <span class="macro">cfg_rt! </span>{ |
| <span class="kw">use </span>core::{ |
| pin::Pin, |
| task::{Context, Poll}, |
| }; |
| <span class="kw">use </span>pin_project_lite::pin_project; |
| <span class="kw">use </span>std::future::Future; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span>tracing::instrument::Instrumented; |
| |
| <span class="attribute">#[inline] |
| #[track_caller] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>task<F>(task: F, kind: <span class="kw-2">&</span><span class="lifetime">'static </span>str, name: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str>, id: u64) -> Instrumented<F> { |
| <span class="kw">use </span>tracing::instrument::Instrument; |
| <span class="kw">let </span>location = std::panic::Location::caller(); |
| <span class="kw">let </span>span = <span class="macro">tracing::trace_span!</span>( |
| target: <span class="string">"tokio::task"</span>, |
| <span class="string">"runtime.spawn"</span>, |
| %kind, |
| task.name = %name.unwrap_or_default(), |
| task.id = id, |
| loc.file = location.file(), |
| loc.line = location.line(), |
| loc.col = location.column(), |
| ); |
| task.instrument(span) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>async_op<P,F>(inner: P, resource_span: tracing::Span, source: <span class="kw-2">&</span>str, poll_op_name: <span class="kw-2">&</span><span class="lifetime">'static </span>str, inherits_child_attrs: bool) -> InstrumentedAsyncOp<F> |
| <span class="kw">where </span>P: FnOnce() -> F { |
| resource_span.in_scope(|| { |
| <span class="kw">let </span>async_op_span = <span class="macro">tracing::trace_span!</span>(<span class="string">"runtime.resource.async_op"</span>, source = source, inherits_child_attrs = inherits_child_attrs); |
| <span class="kw">let </span>enter = async_op_span.enter(); |
| <span class="kw">let </span>async_op_poll_span = <span class="macro">tracing::trace_span!</span>(<span class="string">"runtime.resource.async_op.poll"</span>); |
| <span class="kw">let </span>inner = inner(); |
| drop(enter); |
| <span class="kw">let </span>tracing_ctx = AsyncOpTracingCtx { |
| async_op_span, |
| async_op_poll_span, |
| resource_span: resource_span.clone(), |
| }; |
| InstrumentedAsyncOp { |
| inner, |
| tracing_ctx, |
| poll_op_name, |
| } |
| }) |
| } |
| |
| <span class="attribute">#[derive(Debug, Clone)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>AsyncOpTracingCtx { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) async_op_span: tracing::Span, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) async_op_poll_span: tracing::Span, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) resource_span: tracing::Span, |
| } |
| |
| |
| <span class="macro">pin_project! </span>{ |
| <span class="attribute">#[derive(Debug, Clone)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>InstrumentedAsyncOp<F> { |
| <span class="attribute">#[pin] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) inner: F, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) tracing_ctx: AsyncOpTracingCtx, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) poll_op_name: <span class="kw-2">&</span><span class="lifetime">'static </span>str |
| } |
| } |
| |
| <span class="kw">impl</span><F: Future> Future <span class="kw">for </span>InstrumentedAsyncOp<F> { |
| <span class="kw">type </span>Output = F::Output; |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">let </span>this = <span class="self">self</span>.project(); |
| <span class="kw">let </span>poll_op_name = <span class="kw-2">&*</span>this.poll_op_name; |
| <span class="kw">let </span>_res_enter = this.tracing_ctx.resource_span.enter(); |
| <span class="kw">let </span>_async_op_enter = this.tracing_ctx.async_op_span.enter(); |
| <span class="kw">let </span>_async_op_poll_enter = this.tracing_ctx.async_op_poll_span.enter(); |
| <span class="macro">trace_poll_op!</span>(poll_op_name, this.inner.poll(cx)) |
| } |
| } |
| } |
| } |
| <span class="macro">cfg_time! </span>{ |
| <span class="attribute">#[track_caller] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>caller_location() -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>std::panic::Location<<span class="lifetime">'static</span>>> { |
| <span class="attribute">#[cfg(all(tokio_unstable, feature = <span class="string">"tracing"</span>))] |
| </span><span class="kw">return </span><span class="prelude-val">Some</span>(std::panic::Location::caller()); |
| <span class="attribute">#[cfg(not(all(tokio_unstable, feature = <span class="string">"tracing"</span>)))] |
| </span><span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="macro">cfg_not_trace! </span>{ |
| <span class="macro">cfg_rt! </span>{ |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>task<F>(task: F, <span class="kw">_</span>: <span class="kw-2">&</span><span class="lifetime">'static </span>str, _name: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str>, <span class="kw">_</span>: u64) -> F { |
| <span class="comment">// nop |
| </span>task |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
