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<!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="An asynchronous `Mutex`-like type."><meta name="keywords" content="rust, rustlang, rust-lang, Mutex"><title>Mutex in tokio::sync - Rust</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" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script>
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</a><h2 class="location">Struct Mutex</h2><div class="sidebar-elems"><div class="block items"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><div class="sidebar-links"><a href="#method.blocking_lock">blocking_lock</a><a href="#method.get_mut">get_mut</a><a href="#method.into_inner">into_inner</a><a href="#method.lock">lock</a><a href="#method.lock_owned">lock_owned</a><a href="#method.new">new</a><a href="#method.try_lock">try_lock</a><a href="#method.try_lock_owned">try_lock_owned</a></div><h3 class="sidebar-title"><a href="#trait-implementations">Trait Implementations</a></h3><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Default">Default</a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><div class="sidebar-links"><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3C!%3E">From<!></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><h2 class="location">Other items in<br><a href="../index.html">tokio</a>::<wbr><a href="index.html">sync</a></h2><div id="sidebar-vars" data-name="Mutex" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../tokio/index.html"><img class="rust-logo" src="../../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><h1 class="fqn"><span class="in-band">Struct <a href="../index.html">tokio</a>::<wbr><a href="index.html">sync</a>::<wbr><a class="struct" href="#">Mutex</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#128-133" title="goto source code">[src]</a></span></h1><div class="docblock item-decl"><pre class="rust struct"><code>pub struct Mutex<T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> { /* fields omitted */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An asynchronous <code>Mutex</code>-like type.</p>
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<p>This type acts similarly to <a href="https://doc.rust-lang.org/1.59.0/std/sync/mutex/struct.Mutex.html"><code>std::sync::Mutex</code></a>, with two major
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differences: <a href="struct.Mutex.html#method.lock"><code>lock</code></a> is an async method so does not block, and the lock
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guard is designed to be held across <code>.await</code> points.</p>
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<h2 id="which-kind-of-mutex-should-you-use" class="section-header"><a href="#which-kind-of-mutex-should-you-use">Which kind of mutex should you use?</a></h2>
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<p>Contrary to popular belief, it is ok and often preferred to use the ordinary
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<a href="https://doc.rust-lang.org/1.59.0/std/sync/mutex/struct.Mutex.html"><code>Mutex</code></a> from the standard library in asynchronous code.</p>
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<p>The feature that the async mutex offers over the blocking mutex is the
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ability to keep it locked across an <code>.await</code> point. This makes the async
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mutex more expensive than the blocking mutex, so the blocking mutex should
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be preferred in the cases where it can be used. The primary use case for the
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async mutex is to provide shared mutable access to IO resources such as a
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database connection. If the value behind the mutex is just data, it’s
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usually appropriate to use a blocking mutex such as the one in the standard
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library or <a href="https://docs.rs/parking_lot"><code>parking_lot</code></a>.</p>
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<p>Note that, although the compiler will not prevent the std <code>Mutex</code> from holding
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its guard across <code>.await</code> points in situations where the task is not movable
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between threads, this virtually never leads to correct concurrent code in
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practice as it can easily lead to deadlocks.</p>
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<p>A common pattern is to wrap the <code>Arc<Mutex<...>></code> in a struct that provides
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non-async methods for performing operations on the data within, and only
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lock the mutex inside these methods. The <a href="https://github.com/tokio-rs/mini-redis/blob/master/src/db.rs">mini-redis</a> example provides an
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illustration of this pattern.</p>
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<p>Additionally, when you <em>do</em> want shared access to an IO resource, it is
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often better to spawn a task to manage the IO resource, and to use message
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passing to communicate with that task.</p>
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<h2 id="examples" class="section-header"><a href="#examples">Examples:</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
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<span class="kw">use</span> <span class="ident">std::sync::Arc</span>;
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<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">data1</span> <span class="op">=</span> <span class="ident">Arc::new</span>(<span class="ident">Mutex::new</span>(<span class="number">0</span>));
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<span class="kw">let</span> <span class="ident">data2</span> <span class="op">=</span> <span class="ident">Arc::clone</span>(<span class="kw-2">&</span><span class="ident">data1</span>);
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<span class="ident">tokio::spawn</span>(<span class="kw">async</span> <span class="kw">move</span> {
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">data2</span>.<span class="ident">lock</span>().<span class="kw">await</span>;
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<span class="kw-2">*</span><span class="ident">lock</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
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});
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">data1</span>.<span class="ident">lock</span>().<span class="kw">await</span>;
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<span class="kw-2">*</span><span class="ident">lock</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
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}</code></pre></div>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
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<span class="kw">use</span> <span class="ident">std::sync::Arc</span>;
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<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">count</span> <span class="op">=</span> <span class="ident">Arc::new</span>(<span class="ident">Mutex::new</span>(<span class="number">0</span>));
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<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">5</span> {
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<span class="kw">let</span> <span class="ident">my_count</span> <span class="op">=</span> <span class="ident">Arc::clone</span>(<span class="kw-2">&</span><span class="ident">count</span>);
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<span class="ident">tokio::spawn</span>(<span class="kw">async</span> <span class="kw">move</span> {
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<span class="kw">for</span> <span class="ident">j</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">10</span> {
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">my_count</span>.<span class="ident">lock</span>().<span class="kw">await</span>;
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<span class="kw-2">*</span><span class="ident">lock</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
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<span class="macro">println!</span>(<span class="string">"{} {} {}"</span>, <span class="ident">i</span>, <span class="ident">j</span>, <span class="ident">lock</span>);
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}
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});
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}
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<span class="kw">loop</span> {
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<span class="kw">if</span> <span class="kw-2">*</span><span class="ident">count</span>.<span class="ident">lock</span>().<span class="kw">await</span> <span class="op">></span><span class="op">=</span> <span class="number">50</span> {
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<span class="kw">break</span>;
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}
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}
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<span class="macro">println!</span>(<span class="string">"Count hit 50."</span>);
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}</code></pre></div>
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<p>There are a few things of note here to pay attention to in this example.</p>
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<ol>
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<li>The mutex is wrapped in an <a href="https://doc.rust-lang.org/1.59.0/alloc/sync/struct.Arc.html"><code>Arc</code></a> to allow it to be shared across
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threads.</li>
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<li>Each spawned task obtains a lock and releases it on every iteration.</li>
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<li>Mutation of the data protected by the Mutex is done by de-referencing
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the obtained lock as seen on lines 12 and 19.</li>
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</ol>
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<p>Tokio’s Mutex works in a simple FIFO (first in, first out) style where all
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calls to <a href="struct.Mutex.html#method.lock"><code>lock</code></a> complete in the order they were performed. In that way the
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Mutex is “fair” and predictable in how it distributes the locks to inner
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data. Locks are released and reacquired after every iteration, so basically,
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each thread goes to the back of the line after it increments the value once.
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Note that there’s some unpredictability to the timing between when the
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threads are started, but once they are going they alternate predictably.
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Finally, since there is only a single valid lock at any given time, there is
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no possibility of a race condition when mutating the inner value.</p>
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<p>Note that in contrast to <a href="https://doc.rust-lang.org/1.59.0/std/sync/mutex/struct.Mutex.html"><code>std::sync::Mutex</code></a>, this implementation does not
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poison the mutex when a thread holding the <a href="struct.MutexGuard.html"><code>MutexGuard</code></a> panics. In such a
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case, the mutex will be unlocked. If the panic is caught, this might leave
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the data protected by the mutex in an inconsistent state.</p>
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</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#243-621" title="goto source code">[src]</a></div><a href="#impl" class="anchor"></a><h3 class="code-header in-band">impl<T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.new" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#254-290" title="goto source code">[src]</a></div><a href="#method.new" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>(t: T) -> Self <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h4></div></summary><div class="docblock"><p>Creates a new lock in an unlocked state ready for use.</p>
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<h5 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
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<span class="kw">let</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">Mutex::new</span>(<span class="number">5</span>);</code></pre></div>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.lock" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#338-365" title="goto source code">[src]</a></div><a href="#method.lock" class="anchor"></a><h4 class="code-header">pub async fn <a href="#method.lock" class="fnname">lock</a>(&self) -> <a class="struct" href="struct.MutexGuard.html" title="struct tokio::sync::MutexGuard">MutexGuard</a><'_, T></h4></div></summary><div class="docblock"><p>Locks this mutex, causing the current task to yield until the lock has
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been acquired. When the lock has been acquired, function returns a
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<a href="struct.MutexGuard.html" title="MutexGuard"><code>MutexGuard</code></a>.</p>
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<h5 id="cancel-safety" class="section-header"><a href="#cancel-safety">Cancel safety</a></h5>
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<p>This method uses a queue to fairly distribute locks in the order they
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were requested. Cancelling a call to <code>lock</code> makes you lose your place in
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the queue.</p>
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<h5 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
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<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Mutex::new</span>(<span class="number">1</span>);
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">lock</span>().<span class="kw">await</span>;
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<span class="kw-2">*</span><span class="ident">n</span> <span class="op">=</span> <span class="number">2</span>;
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}</code></pre></div>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.blocking_lock" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#415-417" title="goto source code">[src]</a></div><a href="#method.blocking_lock" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.blocking_lock" class="fnname">blocking_lock</a>(&self) -> <a class="struct" href="struct.MutexGuard.html" title="struct tokio::sync::MutexGuard">MutexGuard</a><'_, T></h4></div></summary><div class="docblock"><p>Blockingly locks this <code>Mutex</code>. When the lock has been acquired, function returns a
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<a href="struct.MutexGuard.html" title="MutexGuard"><code>MutexGuard</code></a>.</p>
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<p>This method is intended for use cases where you
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need to use this mutex in asynchronous code as well as in synchronous code.</p>
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<h5 id="panics" class="section-header"><a href="#panics">Panics</a></h5>
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<p>This function panics if called within an asynchronous execution context.</p>
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<ul>
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<li>If you find yourself in an asynchronous execution context and needing
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to call some (synchronous) function which performs one of these
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<code>blocking_</code> operations, then consider wrapping that call inside
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<a href="../runtime/struct.Handle.html#method.spawn_blocking" title="crate::runtime::Handle::spawn_blocking"><code>spawn_blocking()</code></a>
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(or <a href="../task/fn.block_in_place.html" title="crate::task::block_in_place"><code>block_in_place()</code></a>).</li>
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</ul>
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<h5 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">std::sync::Arc</span>;
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<span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
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<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Arc::new</span>(<span class="ident">Mutex::new</span>(<span class="number">1</span>));
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<span class="kw">let</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">lock</span>().<span class="kw">await</span>;
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<span class="kw">let</span> <span class="ident">mutex1</span> <span class="op">=</span> <span class="ident">Arc::clone</span>(<span class="kw-2">&</span><span class="ident">mutex</span>);
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<span class="kw">let</span> <span class="ident">blocking_task</span> <span class="op">=</span> <span class="ident">tokio::task::spawn_blocking</span>(<span class="kw">move</span> <span class="op">|</span><span class="op">|</span> {
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<span class="comment">// This shall block until the `lock` is released.</span>
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex1</span>.<span class="ident">blocking_lock</span>();
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<span class="kw-2">*</span><span class="ident">n</span> <span class="op">=</span> <span class="number">2</span>;
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});
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<span class="macro">assert_eq!</span>(<span class="kw-2">*</span><span class="ident">lock</span>, <span class="number">1</span>);
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<span class="comment">// Release the lock.</span>
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<span class="ident">drop</span>(<span class="ident">lock</span>);
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<span class="comment">// Await the completion of the blocking task.</span>
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<span class="ident">blocking_task</span>.<span class="kw">await</span>.<span class="ident">unwrap</span>();
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<span class="comment">// Assert uncontended.</span>
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<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">try_lock</span>().<span class="ident">unwrap</span>();
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<span class="macro">assert_eq!</span>(<span class="kw-2">*</span><span class="ident">n</span>, <span class="number">2</span>);
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}
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</code></pre></div>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.lock_owned" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#451-481" title="goto source code">[src]</a></div><a href="#method.lock_owned" class="anchor"></a><h4 class="code-header">pub async fn <a href="#method.lock_owned" class="fnname">lock_owned</a>(self: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><Self>) -> <a class="struct" href="struct.OwnedMutexGuard.html" title="struct tokio::sync::OwnedMutexGuard">OwnedMutexGuard</a><T></h4></div></summary><div class="docblock"><p>Locks this mutex, causing the current task to yield until the lock has
|
||
been acquired. When the lock has been acquired, this returns an
|
||
<a href="struct.OwnedMutexGuard.html" title="OwnedMutexGuard"><code>OwnedMutexGuard</code></a>.</p>
|
||
<p>This method is identical to <a href="struct.Mutex.html#method.lock" title="Mutex::lock"><code>Mutex::lock</code></a>, except that the returned
|
||
guard references the <code>Mutex</code> with an <a href="https://doc.rust-lang.org/1.59.0/alloc/sync/struct.Arc.html"><code>Arc</code></a> rather than by borrowing
|
||
it. Therefore, the <code>Mutex</code> must be wrapped in an <code>Arc</code> to call this
|
||
method, and the guard will live for the <code>'static</code> lifetime, as it keeps
|
||
the <code>Mutex</code> alive by holding an <code>Arc</code>.</p>
|
||
<h5 id="cancel-safety-1" class="section-header"><a href="#cancel-safety-1">Cancel safety</a></h5>
|
||
<p>This method uses a queue to fairly distribute locks in the order they
|
||
were requested. Cancelling a call to <code>lock_owned</code> makes you lose your
|
||
place in the queue.</p>
|
||
<h5 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
|
||
<span class="kw">use</span> <span class="ident">std::sync::Arc</span>;
|
||
|
||
<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
|
||
<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
|
||
<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Arc::new</span>(<span class="ident">Mutex::new</span>(<span class="number">1</span>));
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">clone</span>().<span class="ident">lock_owned</span>().<span class="kw">await</span>;
|
||
<span class="kw-2">*</span><span class="ident">n</span> <span class="op">=</span> <span class="number">2</span>;
|
||
}</code></pre></div>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_lock" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#508-527" title="goto source code">[src]</a></div><a href="#method.try_lock" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.try_lock" class="fnname">try_lock</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.MutexGuard.html" title="struct tokio::sync::MutexGuard">MutexGuard</a><'_, T>, <a class="struct" href="struct.TryLockError.html" title="struct tokio::sync::TryLockError">TryLockError</a>></h4></div></summary><div class="docblock"><p>Attempts to acquire the lock, and returns <a href="struct.TryLockError.html"><code>TryLockError</code></a> if the
|
||
lock is currently held somewhere else.</p>
|
||
<h5 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Mutex::new</span>(<span class="number">1</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">try_lock</span>()<span class="question-mark">?</span>;
|
||
<span class="macro">assert_eq!</span>(<span class="kw-2">*</span><span class="ident">n</span>, <span class="number">1</span>);</code></pre></div>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.get_mut" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#546-551" title="goto source code">[src]</a></div><a href="#method.get_mut" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fnname">get_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.59.0/std/primitive.reference.html">&mut </a>T</h4></div></summary><div class="docblock"><p>Returns a mutable reference to the underlying data.</p>
|
||
<p>Since this call borrows the <code>Mutex</code> mutably, no actual locking needs to
|
||
take place – the mutable borrow statically guarantees no locks exist.</p>
|
||
<h5 id="examples-6" class="section-header"><a href="#examples-6">Examples</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">main</span>() {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Mutex::new</span>(<span class="number">1</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">get_mut</span>();
|
||
<span class="kw-2">*</span><span class="ident">n</span> <span class="op">=</span> <span class="number">2</span>;
|
||
}</code></pre></div>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_lock_owned" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#577-599" title="goto source code">[src]</a></div><a href="#method.try_lock_owned" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.try_lock_owned" class="fnname">try_lock_owned</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><Self><br>) -> <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.OwnedMutexGuard.html" title="struct tokio::sync::OwnedMutexGuard">OwnedMutexGuard</a><T>, <a class="struct" href="struct.TryLockError.html" title="struct tokio::sync::TryLockError">TryLockError</a>></h4></div></summary><div class="docblock"><p>Attempts to acquire the lock, and returns <a href="struct.TryLockError.html"><code>TryLockError</code></a> if the lock
|
||
is currently held somewhere else.</p>
|
||
<p>This method is identical to <a href="struct.Mutex.html#method.try_lock" title="Mutex::try_lock"><code>Mutex::try_lock</code></a>, except that the
|
||
returned guard references the <code>Mutex</code> with an <a href="https://doc.rust-lang.org/1.59.0/alloc/sync/struct.Arc.html"><code>Arc</code></a> rather than by
|
||
borrowing it. Therefore, the <code>Mutex</code> must be wrapped in an <code>Arc</code> to call
|
||
this method, and the guard will live for the <code>'static</code> lifetime, as it
|
||
keeps the <code>Mutex</code> alive by holding an <code>Arc</code>.</p>
|
||
<h5 id="examples-7" class="section-header"><a href="#examples-7">Examples</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
|
||
<span class="kw">use</span> <span class="ident">std::sync::Arc</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Arc::new</span>(<span class="ident">Mutex::new</span>(<span class="number">1</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">clone</span>().<span class="ident">try_lock_owned</span>()<span class="question-mark">?</span>;
|
||
<span class="macro">assert_eq!</span>(<span class="kw-2">*</span><span class="ident">n</span>, <span class="number">1</span>);</code></pre></div>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.into_inner" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#615-620" title="goto source code">[src]</a></div><a href="#method.into_inner" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.into_inner" class="fnname">into_inner</a>(self) -> T <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h4></div></summary><div class="docblock"><p>Consumes the mutex, returning the underlying data.</p>
|
||
<h5 id="examples-8" class="section-header"><a href="#examples-8">Examples</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">tokio::sync::Mutex</span>;
|
||
|
||
<span class="attribute">#[<span class="ident">tokio::main</span>]</span>
|
||
<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">main</span>() {
|
||
<span class="kw">let</span> <span class="ident">mutex</span> <span class="op">=</span> <span class="ident">Mutex::new</span>(<span class="number">1</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">mutex</span>.<span class="ident">into_inner</span>();
|
||
<span class="macro">assert_eq!</span>(<span class="ident">n</span>, <span class="number">1</span>);
|
||
}</code></pre></div>
|
||
</div></details></div></details><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-Debug" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#638-650" title="goto source code">[src]</a></div><a href="#impl-Debug" class="anchor"></a><h3 class="code-header in-band">impl<T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.fmt" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#642-649" title="goto source code">[src]</a></div><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.59.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.59.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.59.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></div></summary><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.59.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-Default" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#629-636" title="goto source code">[src]</a></div><a href="#impl-Default" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.default" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#633-635" title="goto source code">[src]</a></div><a href="#method.default" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.59.0/core/default/trait.Default.html#tymethod.default" class="fnname">default</a>() -> Self</h4></div></summary><div class='docblock'><p>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.59.0/core/default/trait.Default.html#tymethod.default">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-From%3CT%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#623-627" title="goto source code">[src]</a></div><a href="#impl-From%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.from" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#624-626" title="goto source code">[src]</a></div><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(s: T) -> Self</h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
|
||
</div></details></div></details><div id="impl-Send" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#187" title="goto source code">[src]</a></div><a href="#impl-Send" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h3></div><div id="impl-Sync" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/tokio/sync/mutex.rs.html#188" title="goto source code">[src]</a></div><a href="#impl-Sync" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h3></div></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><div id="impl-RefUnwindSafe" class="impl has-srclink"><div class="rightside"></div><a href="#impl-RefUnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<T> !<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T></h3></div><div id="impl-Unpin" class="impl has-srclink"><div class="rightside"></div><a href="#impl-Unpin" class="anchor"></a><h3 class="code-header in-band">impl<T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, </span></h3></div><div id="impl-UnwindSafe" class="impl has-srclink"><div class="rightside"></div><a href="#impl-UnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Mutex.html" title="struct tokio::sync::Mutex">Mutex</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>, </span></h3></div></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-Any" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/any.rs.html#132-136" title="goto source code">[src]</a></div><a href="#impl-Any" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.type_id" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/any.rs.html#133" title="goto source code">[src]</a></div><a href="#method.type_id" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.59.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></div></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.59.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-Borrow%3CT%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/borrow.rs.html#209-214" title="goto source code">[src]</a></div><a href="#impl-Borrow%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.borrow" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/borrow.rs.html#211" title="goto source code">[src]</a></div><a href="#method.borrow" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.59.0/std/primitive.reference.html">&</a>T</h4></div></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
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||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-BorrowMut%3CT%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/borrow.rs.html#218-222" title="goto source code">[src]</a></div><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.59.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.borrow_mut" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/borrow.rs.html#219" title="goto source code">[src]</a></div><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.59.0/std/primitive.reference.html">&mut </a>T</h4></div></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.59.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-From%3C!%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#566-570" title="goto source code">[src]</a></div><a href="#impl-From%3C!%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="primitive" href="https://doc.rust-lang.org/1.59.0/std/primitive.never.html">!</a>> for T</h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.from-1" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#567" title="goto source code">[src]</a></div><a href="#method.from-1" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: <a class="primitive" href="https://doc.rust-lang.org/1.59.0/std/primitive.never.html">!</a>) -> T</h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-From%3CT%3E-1" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#550-554" title="goto source code">[src]</a></div><a href="#impl-From%3CT%3E-1" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.from-2" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#551" title="goto source code">[src]</a></div><a href="#method.from-2" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-Into%3CU%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#538-545" title="goto source code">[src]</a></div><a href="#impl-Into%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.into" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#542" title="goto source code">[src]</a></div><a href="#method.into" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-TryFrom%3CU%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#588-597" title="goto source code">[src]</a></div><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Error-1" class="type trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></div></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_from" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#594" title="goto source code">[src]</a></div><a href="#method.try_from" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl-TryInto%3CU%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#574-583" title="goto source code">[src]</a></div><a href="#impl-TryInto%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></div></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Error" class="type trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></div></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_into" class="method trait-impl has-srclink"><div class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.59.0/src/core/convert/mod.rs.html#580" title="goto source code">[src]</a></div><a href="#method.try_into" class="anchor"></a><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.59.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.59.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><div class='docblock'><p>Performs the conversion.</p>
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