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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="A light-weight lock guarded by an atomic boolean."><title>try_lock - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="try_lock" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="../crates.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod crate"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../try_lock/index.html">try_lock</a><span class="version">0.2.4</span></h2></div><div class="sidebar-elems"><ul class="block">
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<li><a id="all-types" href="all.html">All Items</a></li></ul><section><ul class="block"><li><a href="#structs">Structs</a></li></ul></section></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../try_lock/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Crate <a class="mod" href="#">try_lock</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/try_lock/lib.rs.html#1-275">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A light-weight lock guarded by an atomic boolean.</p>
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<p>Most efficient when contention is low, acquiring the lock is a single
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atomic swap, and releasing it just 1 more atomic swap.</p>
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<h2 id="example"><a href="#example">Example</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::sync::Arc;
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<span class="kw">use </span>try_lock::TryLock;
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<span class="comment">// a thing we want to share
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</span><span class="kw">struct </span>Widget {
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name: String,
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}
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<span class="comment">// lock it up!
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</span><span class="kw">let </span>widget1 = Arc::new(TryLock::new(Widget {
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name: <span class="string">"Spanner"</span>.into(),
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}));
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<span class="kw">let </span>widget2 = widget1.clone();
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<span class="comment">// mutate the widget
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</span><span class="kw">let </span><span class="kw-2">mut </span>locked = widget1.try_lock().expect(<span class="string">"example isn't locked yet"</span>);
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locked.name.push_str(<span class="string">" Bundle"</span>);
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<span class="comment">// hands off, buddy
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</span><span class="kw">let </span>not_locked = widget2.try_lock();
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<span class="macro">assert!</span>(not_locked.is_none(), <span class="string">"widget1 has the lock"</span>);
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<span class="comment">// ok, you can have it
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</span>drop(locked);
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<span class="kw">let </span>locked2 = widget2.try_lock().expect(<span class="string">"widget1 lock is released"</span>);
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<span class="macro">assert_eq!</span>(locked2.name, <span class="string">"Spanner Bundle"</span>);</code></pre></div>
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</div></details><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.Locked.html" title="struct try_lock::Locked">Locked</a></div><div class="desc docblock-short">A locked value acquired from a <code>TryLock</code>.</div></li><li><div class="item-name"><a class="struct" href="struct.TryLock.html" title="struct try_lock::TryLock">TryLock</a></div><div class="desc docblock-short">A light-weight lock guarded by an atomic boolean.</div></li></ul></section></div></main></body></html> |