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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 `Atomic` struct in crate `crossbeam_epoch`."><meta name="keywords" content="rust, rustlang, rust-lang, Atomic"><title>crossbeam_epoch::Atomic - 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></head><body class="rustdoc struct"><!--[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><p class='location'>Struct Atomic</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.null">null</a><a href="#method.new">new</a><a href="#method.load">load</a><a href="#method.store">store</a><a href="#method.swap">swap</a><a href="#method.compare_and_set">compare_and_set</a><a href="#method.compare_and_set_weak">compare_and_set_weak</a><a href="#method.fetch_and">fetch_and</a><a href="#method.fetch_or">fetch_or</a><a href="#method.fetch_xor">fetch_xor</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Debug">Debug</a><a href="#impl-Pointer">Pointer</a><a href="#impl-Clone">Clone</a><a href="#impl-Default">Default</a><a href="#impl-From%3COwned%3CT%3E%3E">From<Owned<T>></a><a href="#impl-From%3CBox%3CT%3E%3E">From<Box<T>></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-From%3CShared%3C%27g%2C%20T%3E%3E">From<Shared<'g, T>></a><a href="#impl-From%3C*const%20T%3E">From<*const T></a></div></div><p class='location'><a href='index.html'>crossbeam_epoch</a></p><script>window.sidebarCurrent = {name: 'Atomic', ty: 'struct', 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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Struct <a href='index.html'>crossbeam_epoch</a>::<wbr><a class="struct" href=''>Atomic</a></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/crossbeam_epoch/atomic.rs.html#126-129' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct Atomic<T> { /* fields omitted */ }</pre></div><div class='docblock'><p>An atomic pointer that can be safely shared between threads.</p>
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<p>The pointer must be properly aligned. Since it is aligned, a tag can be stored into the unused
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least significant bits of the address. More precisely, a tag should be less than <code>(1 << mem::align_of::<T>().trailing_zeros())</code>.</p>
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<p>Any method that loads the pointer must be passed a reference to a <a href="struct.Guard.html"><code>Guard</code></a>.</p>
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</div><h2 id='methods' class='small-section-header'>Methods<a href='#methods' class='anchor'></a></h2><h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#134-447' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.null' class="method"><span id='null.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.null' class='fnname'>null</a>() -> <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#153-158' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a new null atomic pointer.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::<span class="ident">Atomic</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">null</span>();</pre>
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</div><h4 id='method.new' class="method"><span id='new.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new' class='fnname'>new</a>(value: T) -> <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#186-188' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Allocates <code>value</code> on the heap and returns a new atomic pointer pointing to it.</p>
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<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::<span class="ident">Atomic</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);</pre>
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</div><h4 id='method.load' class="method"><span id='load.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.load' class='fnname'>load</a><'g>(&self, ord: <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a>) -> <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#207-209' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Loads a <code>Shared</code> from the atomic pointer.</p>
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<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
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operation.</p>
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<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);
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<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
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<span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>);</pre>
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</div><h4 id='method.store' class="method"><span id='store.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.store' class='fnname'>store</a><'g, P: Pointer<T>>(&self, new: P, ord: <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></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#228-230' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Stores a <code>Shared</code> or <code>Owned</code> pointer into the atomic pointer.</p>
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<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
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operation.</p>
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<h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Owned</span>, <span class="ident">Shared</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);
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<span class="ident">a</span>.<span class="ident">store</span>(<span class="ident">Shared</span>::<span class="ident">null</span>(), <span class="ident">SeqCst</span>);
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<span class="ident">a</span>.<span class="ident">store</span>(<span class="ident">Owned</span>::<span class="ident">new</span>(<span class="number">1234</span>), <span class="ident">SeqCst</span>);</pre>
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</div><h4 id='method.swap' class="method"><span id='swap.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.swap' class='fnname'>swap</a><'g, P: Pointer<T>>(<br> &self, <br> new: P, <br> ord: <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#250-252' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Stores a <code>Shared</code> or <code>Owned</code> pointer into the atomic pointer, returning the previous
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<code>Shared</code>.</p>
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<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
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operation.</p>
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<h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Owned</span>, <span class="ident">Shared</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);
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<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
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<span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">swap</span>(<span class="ident">Shared</span>::<span class="ident">null</span>(), <span class="ident">SeqCst</span>, <span class="ident">guard</span>);</pre>
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</div><h4 id='method.compare_and_set' class="method"><span id='compare_and_set.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.compare_and_set' class='fnname'>compare_and_set</a><'g, O, P>(<br> &self, <br> current: <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><T>, <br> new: P, <br> ord: O, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T>, <a class="struct" href="../crossbeam_epoch/struct.CompareAndSetError.html" title="struct crossbeam_epoch::CompareAndSetError">CompareAndSetError</a><'g, T, P>> <span class="where fmt-newline">where<br> O: <a class="trait" href="../crossbeam_epoch/trait.CompareAndSetOrdering.html" title="trait crossbeam_epoch::CompareAndSetOrdering">CompareAndSetOrdering</a>,<br> P: Pointer<T>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#280-301' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Stores the pointer <code>new</code> (either <code>Shared</code> or <code>Owned</code>) into the atomic pointer if the current
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value is the same as <code>current</code>. The tag is also taken into account, so two pointers to the
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same object, but with different tags, will not be considered equal.</p>
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<p>The return value is a result indicating whether the new pointer was written. On success the
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pointer that was written is returned. On failure the actual current value and <code>new</code> are
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returned.</p>
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<p>This method takes a <a href="trait.CompareAndSetOrdering.html"><code>CompareAndSetOrdering</code></a> argument which describes the memory
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ordering of this operation.</p>
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<h1 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Owned</span>, <span class="ident">Shared</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);
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<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">curr</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>);
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<span class="kw">let</span> <span class="ident">res1</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">compare_and_set</span>(<span class="ident">curr</span>, <span class="ident">Shared</span>::<span class="ident">null</span>(), <span class="ident">SeqCst</span>, <span class="ident">guard</span>);
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<span class="kw">let</span> <span class="ident">res2</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">compare_and_set</span>(<span class="ident">curr</span>, <span class="ident">Owned</span>::<span class="ident">new</span>(<span class="number">5678</span>), <span class="ident">SeqCst</span>, <span class="ident">guard</span>);</pre>
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</div><h4 id='method.compare_and_set_weak' class="method"><span id='compare_and_set_weak.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.compare_and_set_weak' class='fnname'>compare_and_set_weak</a><'g, O, P>(<br> &self, <br> current: <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><T>, <br> new: P, <br> ord: O, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T>, <a class="struct" href="../crossbeam_epoch/struct.CompareAndSetError.html" title="struct crossbeam_epoch::CompareAndSetError">CompareAndSetError</a><'g, T, P>> <span class="where fmt-newline">where<br> O: <a class="trait" href="../crossbeam_epoch/trait.CompareAndSetOrdering.html" title="trait crossbeam_epoch::CompareAndSetOrdering">CompareAndSetOrdering</a>,<br> P: Pointer<T>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#350-371' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Stores the pointer <code>new</code> (either <code>Shared</code> or <code>Owned</code>) into the atomic pointer if the current
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value is the same as <code>current</code>. The tag is also taken into account, so two pointers to the
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same object, but with different tags, will not be considered equal.</p>
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<p>Unlike <a href="struct.Atomic.html#method.compare_and_set"><code>compare_and_set</code></a>, this method is allowed to spuriously fail even when comparison
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succeeds, which can result in more efficient code on some platforms. The return value is a
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result indicating whether the new pointer was written. On success the pointer that was
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written is returned. On failure the actual current value and <code>new</code> are returned.</p>
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<p>This method takes a <a href="trait.CompareAndSetOrdering.html"><code>CompareAndSetOrdering</code></a> argument which describes the memory
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ordering of this operation.</p>
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<h1 id="examples-6" class="section-header"><a href="#examples-6">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Owned</span>, <span class="ident">Shared</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
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<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="ident">new</span>(<span class="number">1234</span>);
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<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new</span> <span class="op">=</span> <span class="ident">Owned</span>::<span class="ident">new</span>(<span class="number">5678</span>);
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>);
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<span class="kw">loop</span> {
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<span class="kw">match</span> <span class="ident">a</span>.<span class="ident">compare_and_set_weak</span>(<span class="ident">ptr</span>, <span class="ident">new</span>, <span class="ident">SeqCst</span>, <span class="ident">guard</span>) {
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<span class="prelude-val">Ok</span>(<span class="ident">p</span>) <span class="op">=></span> {
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<span class="ident">ptr</span> <span class="op">=</span> <span class="ident">p</span>;
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<span class="kw">break</span>;
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}
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<span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=></span> {
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<span class="ident">ptr</span> <span class="op">=</span> <span class="ident">err</span>.<span class="ident">current</span>;
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<span class="ident">new</span> <span class="op">=</span> <span class="ident">err</span>.<span class="ident">new</span>;
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}
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}
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}
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">curr</span> <span class="op">=</span> <span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>);
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<span class="kw">loop</span> {
|
||
<span class="kw">match</span> <span class="ident">a</span>.<span class="ident">compare_and_set_weak</span>(<span class="ident">curr</span>, <span class="ident">Shared</span>::<span class="ident">null</span>(), <span class="ident">SeqCst</span>, <span class="ident">guard</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) <span class="op">=></span> <span class="kw">break</span>,
|
||
<span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=></span> <span class="ident">curr</span> <span class="op">=</span> <span class="ident">err</span>.<span class="ident">current</span>,
|
||
}
|
||
}</pre>
|
||
</div><h4 id='method.fetch_and' class="method"><span id='fetch_and.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.fetch_and' class='fnname'>fetch_and</a><'g>(<br> &self, <br> val: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> ord: <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#394-396' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Bitwise "and" with the current tag.</p>
|
||
<p>Performs a bitwise "and" operation on the current tag and the argument <code>val</code>, and sets the
|
||
new tag to the result. Returns the previous pointer.</p>
|
||
<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
|
||
operation.</p>
|
||
<h1 id="examples-7" class="section-header"><a href="#examples-7">Examples</a></h1>
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Shared</span>};
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">Shared</span>::<span class="ident">null</span>().<span class="ident">with_tag</span>(<span class="number">3</span>));
|
||
<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">fetch_and</span>(<span class="number">2</span>, <span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">3</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">2</span>);</pre>
|
||
</div><h4 id='method.fetch_or' class="method"><span id='fetch_or.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.fetch_or' class='fnname'>fetch_or</a><'g>(<br> &self, <br> val: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> ord: <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#419-421' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Bitwise "or" with the current tag.</p>
|
||
<p>Performs a bitwise "or" operation on the current tag and the argument <code>val</code>, and sets the
|
||
new tag to the result. Returns the previous pointer.</p>
|
||
<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
|
||
operation.</p>
|
||
<h1 id="examples-8" class="section-header"><a href="#examples-8">Examples</a></h1>
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Shared</span>};
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">Shared</span>::<span class="ident">null</span>().<span class="ident">with_tag</span>(<span class="number">1</span>));
|
||
<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">fetch_or</span>(<span class="number">2</span>, <span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">1</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">3</span>);</pre>
|
||
</div><h4 id='method.fetch_xor' class="method"><span id='fetch_xor.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.fetch_xor' class='fnname'>fetch_xor</a><'g>(<br> &self, <br> val: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> ord: <a class="enum" href="https://doc.rust-lang.org/nightly/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>, <br> _: &'g <a class="struct" href="../crossbeam_epoch/struct.Guard.html" title="struct crossbeam_epoch::Guard">Guard</a><br>) -> <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#444-446' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Bitwise "xor" with the current tag.</p>
|
||
<p>Performs a bitwise "xor" operation on the current tag and the argument <code>val</code>, and sets the
|
||
new tag to the result. Returns the previous pointer.</p>
|
||
<p>This method takes an <a href="https://doc.rust-lang.org/std/sync/atomic/enum.Ordering.html"><code>Ordering</code></a> argument which describes the memory ordering of this
|
||
operation.</p>
|
||
<h1 id="examples-9" class="section-header"><a href="#examples-9">Examples</a></h1>
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="self">self</span> <span class="kw">as</span> <span class="ident">epoch</span>, <span class="ident">Atomic</span>, <span class="ident">Shared</span>};
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">Shared</span>::<span class="ident">null</span>().<span class="ident">with_tag</span>(<span class="number">1</span>));
|
||
<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">epoch</span>::<span class="ident">pin</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">fetch_xor</span>(<span class="number">3</span>, <span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">1</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">load</span>(<span class="ident">SeqCst</span>, <span class="ident">guard</span>).<span class="ident">tag</span>(), <span class="number">2</span>);</pre>
|
||
</div></div><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#131' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#132' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#449-459' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#450-458' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
|
||
</div></div><h3 id='impl-Pointer' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Pointer.html" title="trait core::fmt::Pointer">Pointer</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Pointer' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#461-467' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt-1' class="method"><span id='fmt.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Pointer.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#462-466' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter.</p>
|
||
</div></div><h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Clone' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#469-478' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#474-477' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a copy of the atomic value.</p>
|
||
<p>Note that a <code>Relaxed</code> load is used here. If you need synchronization, use it with other
|
||
atomics or fences.</p>
|
||
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#130-132' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
|
||
</div></div><h3 id='impl-Default' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-Default' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#480-484' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.default' class="method"><span id='default.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default' class='fnname'>default</a>() -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#481-483' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the "default value" for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
|
||
</div></div><h3 id='impl-From%3COwned%3CT%3E%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="struct" href="../crossbeam_epoch/struct.Owned.html" title="struct crossbeam_epoch::Owned">Owned</a><T>> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-From%3COwned%3CT%3E%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#486-501' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(owned: <a class="struct" href="../crossbeam_epoch/struct.Owned.html" title="struct crossbeam_epoch::Owned">Owned</a><T>) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#496-500' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a new atomic pointer pointing to <code>owned</code>.</p>
|
||
<h1 id="examples-10" class="section-header"><a href="#examples-10">Examples</a></h1>
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="ident">Atomic</span>, <span class="ident">Owned</span>};
|
||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">Owned</span>::<span class="ident">new</span>(<span class="number">1234</span>));</pre>
|
||
</div></div><h3 id='impl-From%3CBox%3CT%3E%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><T>> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-From%3CBox%3CT%3E%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#503-507' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-1' class="method"><span id='from.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(b: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><T>) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#504-506' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
|
||
</div></div><h3 id='impl-From%3CT%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-From%3CT%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#509-513' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-2' class="method"><span id='from.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(t: T) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#510-512' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-From%3CShared%3C%27g%2C%20T%3E%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'g, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T>> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-From%3CShared%3C%27g%2C%20T%3E%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#515-528' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-3' class="method"><span id='from.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(ptr: <a class="struct" href="../crossbeam_epoch/struct.Shared.html" title="struct crossbeam_epoch::Shared">Shared</a><'g, T>) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#525-527' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a new atomic pointer pointing to <code>ptr</code>.</p>
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<h1 id="examples-11" class="section-header"><a href="#examples-11">Examples</a></h1>
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<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::{<span class="ident">Atomic</span>, <span class="ident">Shared</span>};
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||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">Shared</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">null</span>());</pre>
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</div></div><h3 id='impl-From%3C*const%20T%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const T</a>> for <a class="struct" href="../crossbeam_epoch/struct.Atomic.html" title="struct crossbeam_epoch::Atomic">Atomic</a><T></code><a href='#impl-From%3C*const%20T%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#530-544' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-4' class="method"><span id='from.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(raw: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const T</a>) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/crossbeam_epoch/atomic.rs.html#541-543' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a new atomic pointer pointing to <code>raw</code>.</p>
|
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<h1 id="examples-12" class="section-header"><a href="#examples-12">Examples</a></h1>
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
|
||
<span class="kw">use</span> <span class="ident">crossbeam_epoch</span>::<span class="ident">Atomic</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">Atomic</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>::<span class="ident">from</span>(<span class="ident">ptr</span>::<span class="ident">null</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>());</pre>
|
||
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