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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 `CompareAndSetOrdering` trait in crate `crossbeam_epoch`."><meta name="keywords" content="rust, rustlang, rust-lang, CompareAndSetOrdering"><title>crossbeam_epoch::CompareAndSetOrdering - 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="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[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='../crossbeam_epoch/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><p class='location'>Trait CompareAndSetOrdering</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.failure">failure</a><a href="#tymethod.success">success</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-CompareAndSetOrdering-for-(Ordering%2C%20Ordering)">(Ordering, Ordering)</a><a href="#impl-CompareAndSetOrdering-for-Ordering">Ordering</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>crossbeam_epoch</a></p><script>window.sidebarCurrent = {name: 'CompareAndSetOrdering', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><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><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/crossbeam_epoch/atomic.rs.html#55-64' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='index.html'>crossbeam_epoch</a>::<wbr><a class="trait" href=''>CompareAndSetOrdering</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait CompareAndSetOrdering {
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fn <a href='#tymethod.success' class='fnname'>success</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>;
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<div class='item-spacer'></div> fn <a href='#tymethod.failure' class='fnname'>failure</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>;
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}</pre></div><div class='docblock'><p>Memory orderings for compare-and-set operations.</p>
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<p>A compare-and-set operation can have different memory orderings depending on whether it
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succeeds or fails. This trait generalizes different ways of specifying memory orderings.</p>
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<p>The two ways of specifying orderings for compare-and-set are:</p>
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<ol>
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<li>Just one <code>Ordering</code> for the success case. In case of failure, the strongest appropriate
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ordering is chosen.</li>
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<li>A pair of <code>Ordering</code>s. The first one is for the success case, while the second one is
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for the failure case.</li>
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</ol>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.success' class='method'><code id='success.v'>fn <a href='#tymethod.success' class='fnname'>success</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code></h3><div class='docblock'><p>The ordering of the operation when it succeeds.</p>
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</div><h3 id='tymethod.failure' class='method'><code id='failure.v'>fn <a href='#tymethod.failure' class='fnname'>failure</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code></h3><div class='docblock'><p>The ordering of the operation when it fails.</p>
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<p>The failure ordering can't be <code>Release</code> or <code>AcqRel</code> and must be equivalent or weaker than
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the success ordering.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='foreign-impls' class='small-section-header'>Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a></h2><h3 id='impl-CompareAndSetOrdering-for-Ordering' class='impl'><code class='in-band'>impl <a class="trait" href="../crossbeam_epoch/trait.CompareAndSetOrdering.html" title="trait crossbeam_epoch::CompareAndSetOrdering">CompareAndSetOrdering</a> for <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code><a href='#impl-CompareAndSetOrdering-for-Ordering' class='anchor'></a><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#66-76' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.success' class="method hidden"><code id='success.v-1'>fn <a href='#method.success' class='fnname'>success</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#68-70' title='goto source code'>[src]</a></h4><h4 id='method.failure' class="method hidden"><code id='failure.v-1'>fn <a href='#method.failure' class='fnname'>failure</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#73-75' title='goto source code'>[src]</a></h4></div><h3 id='impl-CompareAndSetOrdering-for-(Ordering%2C%20Ordering)' class='impl'><code class='in-band'>impl <a class="trait" href="../crossbeam_epoch/trait.CompareAndSetOrdering.html" title="trait crossbeam_epoch::CompareAndSetOrdering">CompareAndSetOrdering</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a></code><a href='#impl-CompareAndSetOrdering-for-(Ordering%2C%20Ordering)' class='anchor'></a><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#78-88' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.success-1' class="method hidden"><code id='success.v-2'>fn <a href='#method.success' class='fnname'>success</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#80-82' title='goto source code'>[src]</a></h4><h4 id='method.failure-1' class="method hidden"><code id='failure.v-2'>fn <a href='#method.failure' class='fnname'>failure</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a></code><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#85-87' title='goto source code'>[src]</a></h4></div><span class='loading-content'>Loading content...</span>
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