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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="API documentation for the Rust `race` mod in crate `once_cell`."><meta name="keywords" content="rust, rustlang, rust-lang, race"><title>once_cell::race - Rust</title><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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../once_cell/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Module race</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><p class="location"><a href="../index.html">once_cell</a></p><script>window.sidebarCurrent = {name: "race", ty: "mod", relpath: "../"};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><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" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><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/once_cell/race.rs.html#1-285" title="goto source code">[src]</a></span><span class="in-band">Module <a href="../index.html">once_cell</a>::<wbr><a class="mod" href="">race</a></span></h1><div class="docblock"><p>"First one wins" flavor of <code>OnceCell</code>.</p>
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<p>If two threads race to initialize a type from the <code>race</code> module, they
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don't block, execute initialization function together, but only one of
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them stores the result.</p>
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<p>This module does not require <code>std</code> feature.</p>
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</div><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
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<table><tr class="module-item"><td><a class="struct" href="struct.OnceBool.html" title="once_cell::race::OnceBool struct">OnceBool</a></td><td class="docblock-short"><p>A thread-safe cell which can be written to only once.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.OnceBox.html" title="once_cell::race::OnceBox struct">OnceBox</a></td><td class="docblock-short"><p>A thread-safe cell which can be written to only once.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.OnceNonZeroUsize.html" title="once_cell::race::OnceNonZeroUsize struct">OnceNonZeroUsize</a></td><td class="docblock-short"><p>A thread-safe cell which can be written to only once.</p>
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