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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 integer type which can be safely shared between threads."><title>AtomicU64 in portable_atomic - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-492a78a4a87dcc01.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="portable_atomic" data-themes="" data-resource-suffix="" data-rustdoc-version="1.82.0 (f6e511eec 2024-10-15)" data-channel="1.82.0" data-search-js="search-a99f1315e7cc5121.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-921df33f47b8780c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-3b12f09e550e0385.css"></noscript><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 struct"><!--[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" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../portable_atomic/index.html">portable_<wbr>atomic</a><span class="version">1.9.0</span></h2></div><h2 class="location"><a href="#">Atomic<wbr>U64</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.add">add</a></li><li><a href="#method.and">and</a></li><li><a href="#method.as_ptr">as_ptr</a></li><li><a href="#method.bit_clear">bit_clear</a></li><li><a href="#method.bit_set">bit_set</a></li><li><a href="#method.bit_toggle">bit_toggle</a></li><li><a href="#method.compare_exchange">compare_exchange</a></li><li><a href="#method.compare_exchange_weak">compare_exchange_weak</a></li><li><a href="#method.fetch_add">fetch_add</a></li><li><a href="#method.fetch_and">fetch_and</a></li><li><a href="#method.fetch_max">fetch_max</a></li><li><a href="#method.fetch_min">fetch_min</a></li><li><a href="#method.fetch_nand">fetch_nand</a></li><li><a href="#method.fetch_neg">fetch_neg</a></li><li><a href="#method.fetch_not">fetch_not</a></li><li><a href="#method.fetch_or">fetch_or</a></li><li><a href="#method.fetch_sub">fetch_sub</a></li><li><a href="#method.fetch_update">fetch_update</a></li><li><a href="#method.fetch_xor">fetch_xor</a></li><li><a href="#method.from_ptr">from_ptr</a></li><li><a href="#method.get_mut">get_mut</a></li><li><a href="#method.into_inner">into_inner</a></li><li><a href="#method.is_always_lock_free">is_always_lock_free</a></li><li><a href="#method.is_lock_free">is_lock_free</a></li><li><a href="#method.load">load</a></li><li><a href="#method.neg">neg</a></li><li><a href="#method.new">new</a></li><li><a href="#method.not">not</a></li><li><a href="#method.or">or</a></li><li><a href="#method.store">store</a></li><li><a href="#method.sub">sub</a></li><li><a href="#method.swap">swap</a></li><li><a href="#method.xor">xor</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-AtomicU64">Debug</a></li><li><a href="#impl-Default-for-AtomicU64">Default</a></li><li><a href="#impl-From%3Cu64%3E-for-AtomicU64">From&#60;u64&#62;</a></li><li><a href="#impl-RefUnwindSafe-for-AtomicU64">RefUnwindSafe</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Freeze-for-AtomicU64">!Freeze</a></li><li><a href="#impl-Send-for-AtomicU64">Send</a></li><li><a href="#impl-Sync-for-AtomicU64">Sync</a></li><li><a href="#impl-Unpin-for-AtomicU64">Unpin</a></li><li><a href="#impl-UnwindSafe-for-AtomicU64">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow&#60;T&#62;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&#60;T&#62;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&#60;T&#62;</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&#60;U&#62;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&#60;U&#62;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&#60;U&#62;</a></li></ul></section><h2><a href="index.html">In crate portable_<wbr>atomic</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="index.html">portable_atomic</a>::<wbr><a class="struct" href="#">AtomicU64</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code><div class="code-attribute">#[repr(C, align(8))]</div>pub struct AtomicU64 { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An integer type which can be safely shared between threads.</p>
<p>This type has the same in-memory representation as the underlying integer type,
<a href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html" title="primitive u64"><code>u64</code></a>.</p>
<p>If the compiler and the platform support atomic loads and stores of <a href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html" title="primitive u64"><code>u64</code></a>, this type is a wrapper for the standard library’s <code>AtomicU64</code>. If the platform supports it but the compiler does not, atomic operations are implemented using
inline assembly. Otherwise synchronizes using global locks.
You can call <a href="struct.AtomicU64.html#method.is_lock_free" title="associated function portable_atomic::AtomicU64::is_lock_free"><code>AtomicU64::is_lock_free()</code></a> to check whether
atomic instructions or locks will be used.</p>
</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-AtomicU64" class="impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#impl-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub const fn <a href="#method.new" class="fn">new</a>(v: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>) -&gt; Self</h4></section></summary><div class="docblock"><p>Creates a new atomic integer.</p>
<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::AtomicU64;
<span class="kw">let </span>atomic_forty_two = AtomicU64::new(<span class="number">42</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.from_ptr" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub unsafe fn <a href="#method.from_ptr" class="fn">from_ptr</a>&lt;'a&gt;(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.pointer.html">*mut </a><a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>) -&gt; &amp;'a Self</h4></section></summary><div class="docblock"><p>Creates a new reference to an atomic integer from a pointer.</p>
<h5 id="safety"><a class="doc-anchor" href="#safety">§</a>Safety</h5>
<ul>
<li><code>ptr</code> must be aligned to <code>align_of::&lt;AtomicU64&gt;()</code> (note that on some platforms this
can be bigger than <code>align_of::&lt;u64&gt;()</code>).</li>
<li><code>ptr</code> must be <a href="https://doc.rust-lang.org/1.82.0/core/ptr/index.html#safety" title="mod core::ptr">valid</a> for both reads and writes for the whole lifetime <code>'a</code>.</li>
<li>If this atomic type is <a href="struct.AtomicU64.html#method.is_lock_free" title="associated function portable_atomic::AtomicU64::is_lock_free">lock-free</a>, non-atomic accesses to the value
behind <code>ptr</code> must have a happens-before relationship with atomic accesses via
the returned value (or vice-versa).
<ul>
<li>In other words, time periods where the value is accessed atomically may not
overlap with periods where the value is accessed non-atomically.</li>
<li>This requirement is trivially satisfied if <code>ptr</code> is never used non-atomically
for the duration of lifetime <code>'a</code>. Most use cases should be able to follow
this guideline.</li>
<li>This requirement is also trivially satisfied if all accesses (atomic or not) are
done from the same thread.</li>
</ul>
</li>
<li>If this atomic type is <em>not</em> lock-free:
<ul>
<li>Any accesses to the value behind <code>ptr</code> must have a happens-before relationship
with accesses via the returned value (or vice-versa).</li>
<li>Any concurrent accesses to the value behind <code>ptr</code> for the duration of lifetime <code>'a</code> must
be compatible with operations performed by this atomic type.</li>
</ul>
</li>
<li>This method must not be used to create overlapping or mixed-size atomic
accesses, as these are not supported by the memory model.</li>
</ul>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_lock_free" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.is_lock_free" class="fn">is_lock_free</a>() -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if operations on values of this type are lock-free.</p>
<p>If the compiler or the platform doesn’t support the necessary
atomic instructions, global locks for every potentially
concurrent atomic operation will be used.</p>
<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::AtomicU64;
<span class="kw">let </span>is_lock_free = AtomicU64::is_lock_free();</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_always_lock_free" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub const fn <a href="#method.is_always_lock_free" class="fn">is_always_lock_free</a>() -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if operations on values of this type are lock-free.</p>
<p>If the compiler or the platform doesn’t support the necessary
atomic instructions, global locks for every potentially
concurrent atomic operation will be used.</p>
<p><strong>Note:</strong> If the atomic operation relies on dynamic CPU feature detection,
this type may be lock-free even if the function returns false.</p>
<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::AtomicU64;
<span class="kw">const </span>IS_ALWAYS_LOCK_FREE: bool = AtomicU64::is_always_lock_free();</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_mut" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fn">get_mut</a>(&amp;mut self) -&gt; &amp;mut <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the underlying integer.</p>
<p>This is safe because the mutable reference guarantees that no other threads are
concurrently accessing the atomic data.</p>
<h5 id="examples-3"><a class="doc-anchor" href="#examples-3">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span><span class="kw-2">mut </span>some_var = AtomicU64::new(<span class="number">10</span>);
<span class="macro">assert_eq!</span>(<span class="kw-2">*</span>some_var.get_mut(), <span class="number">10</span>);
<span class="kw-2">*</span>some_var.get_mut() = <span class="number">5</span>;
<span class="macro">assert_eq!</span>(some_var.load(Ordering::SeqCst), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.into_inner" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub const fn <a href="#method.into_inner" class="fn">into_inner</a>(self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Consumes the atomic and returns the contained value.</p>
<p>This is safe because passing <code>self</code> by value guarantees that no other threads are
concurrently accessing the atomic data.</p>
<p>This is <code>const fn</code> on Rust 1.56+.</p>
<h5 id="examples-4"><a class="doc-anchor" href="#examples-4">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::AtomicU64;
<span class="kw">let </span>some_var = AtomicU64::new(<span class="number">5</span>);
<span class="macro">assert_eq!</span>(some_var.into_inner(), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.load" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.load" class="fn">load</a>(&amp;self, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Loads a value from the atomic integer.</p>
<p><code>load</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering of this operation.
Possible values are <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.SeqCst" title="variant core::sync::atomic::Ordering::SeqCst"><code>SeqCst</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> and <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
<p>Panics if <code>order</code> is <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> or <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.AcqRel" title="variant core::sync::atomic::Ordering::AcqRel"><code>AcqRel</code></a>.</p>
<h5 id="examples-5"><a class="doc-anchor" href="#examples-5">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>some_var = AtomicU64::new(<span class="number">5</span>);
<span class="macro">assert_eq!</span>(some_var.load(Ordering::Relaxed), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.store" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.store" class="fn">store</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Stores a value into the atomic integer.</p>
<p><code>store</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering of this operation.
Possible values are <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.SeqCst" title="variant core::sync::atomic::Ordering::SeqCst"><code>SeqCst</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> and <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5>
<p>Panics if <code>order</code> is <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> or <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.AcqRel" title="variant core::sync::atomic::Ordering::AcqRel"><code>AcqRel</code></a>.</p>
<h5 id="examples-6"><a class="doc-anchor" href="#examples-6">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>some_var = AtomicU64::new(<span class="number">5</span>);
some_var.store(<span class="number">10</span>, Ordering::Relaxed);
<span class="macro">assert_eq!</span>(some_var.load(Ordering::Relaxed), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.swap" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.swap" class="fn">swap</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Stores a value into the atomic integer, returning the previous value.</p>
<p><code>swap</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-7"><a class="doc-anchor" href="#examples-7">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>some_var = AtomicU64::new(<span class="number">5</span>);
<span class="macro">assert_eq!</span>(some_var.swap(<span class="number">10</span>, Ordering::Relaxed), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.compare_exchange" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.compare_exchange" class="fn">compare_exchange</a>(
&amp;self,
current: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>,
new: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>,
success: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
failure: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>&gt;</h4></section></summary><div class="docblock"><p>Stores a value into the atomic integer if the current value is the same as
the <code>current</code> value.</p>
<p>The return value is a result indicating whether the new value was written and
containing the previous value. On success this value is guaranteed to be equal to
<code>current</code>.</p>
<p><code>compare_exchange</code> takes two <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> arguments to describe the memory
ordering of this operation. <code>success</code> describes the required ordering for the
read-modify-write operation that takes place if the comparison with <code>current</code> succeeds.
<code>failure</code> describes the required ordering for the load operation that takes place when
the comparison fails. Using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> as success ordering makes the store part
of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the successful load
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>. The failure ordering can only be <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.SeqCst" title="variant core::sync::atomic::Ordering::SeqCst"><code>SeqCst</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> or <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="panics-2"><a class="doc-anchor" href="#panics-2">§</a>Panics</h5>
<p>Panics if <code>failure</code> is <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.AcqRel" title="variant core::sync::atomic::Ordering::AcqRel"><code>AcqRel</code></a>.</p>
<h5 id="examples-8"><a class="doc-anchor" href="#examples-8">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>some_var = AtomicU64::new(<span class="number">5</span>);
<span class="macro">assert_eq!</span>(
some_var.compare_exchange(<span class="number">5</span>, <span class="number">10</span>, Ordering::Acquire, Ordering::Relaxed),
<span class="prelude-val">Ok</span>(<span class="number">5</span>),
);
<span class="macro">assert_eq!</span>(some_var.load(Ordering::Relaxed), <span class="number">10</span>);
<span class="macro">assert_eq!</span>(
some_var.compare_exchange(<span class="number">6</span>, <span class="number">12</span>, Ordering::SeqCst, Ordering::Acquire),
<span class="prelude-val">Err</span>(<span class="number">10</span>),
);
<span class="macro">assert_eq!</span>(some_var.load(Ordering::Relaxed), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.compare_exchange_weak" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.compare_exchange_weak" class="fn">compare_exchange_weak</a>(
&amp;self,
current: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>,
new: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>,
success: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
failure: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>&gt;</h4></section></summary><div class="docblock"><p>Stores a value into the atomic integer if the current value is the same as
the <code>current</code> value.
Unlike <a href="struct.AtomicU64.html#method.compare_exchange" title="method portable_atomic::AtomicU64::compare_exchange"><code>compare_exchange</code></a>
this function is allowed to spuriously fail even
when the comparison succeeds, which can result in more efficient code on some
platforms. The return value is a result indicating whether the new value was
written and containing the previous value.</p>
<p><code>compare_exchange_weak</code> takes two <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> arguments to describe the memory
ordering of this operation. <code>success</code> describes the required ordering for the
read-modify-write operation that takes place if the comparison with <code>current</code> succeeds.
<code>failure</code> describes the required ordering for the load operation that takes place when
the comparison fails. Using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> as success ordering makes the store part
of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the successful load
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>. The failure ordering can only be <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.SeqCst" title="variant core::sync::atomic::Ordering::SeqCst"><code>SeqCst</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> or <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="panics-3"><a class="doc-anchor" href="#panics-3">§</a>Panics</h5>
<p>Panics if <code>failure</code> is <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.AcqRel" title="variant core::sync::atomic::Ordering::AcqRel"><code>AcqRel</code></a>.</p>
<h5 id="examples-9"><a class="doc-anchor" href="#examples-9">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>val = AtomicU64::new(<span class="number">4</span>);
<span class="kw">let </span><span class="kw-2">mut </span>old = val.load(Ordering::Relaxed);
<span class="kw">loop </span>{
<span class="kw">let </span>new = old * <span class="number">2</span>;
<span class="kw">match </span>val.compare_exchange_weak(old, new, Ordering::SeqCst, Ordering::Relaxed) {
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) =&gt; <span class="kw">break</span>,
<span class="prelude-val">Err</span>(x) =&gt; old = x,
}
}</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_add" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_add" class="fn">fetch_add</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Adds to the current value, returning the previous value.</p>
<p>This operation wraps around on overflow.</p>
<p><code>fetch_add</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-10"><a class="doc-anchor" href="#examples-10">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(foo.fetch_add(<span class="number">10</span>, Ordering::SeqCst), <span class="number">0</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.add" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.add" class="fn">add</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Adds to the current value.</p>
<p>This operation wraps around on overflow.</p>
<p>Unlike <code>fetch_add</code>, this does not return the previous value.</p>
<p><code>add</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_add</code> on some platforms.</p>
<ul>
<li>MSP430: <code>add</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<h5 id="examples-11"><a class="doc-anchor" href="#examples-11">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0</span>);
foo.add(<span class="number">10</span>, Ordering::SeqCst);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_sub" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_sub" class="fn">fetch_sub</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Subtracts from the current value, returning the previous value.</p>
<p>This operation wraps around on overflow.</p>
<p><code>fetch_sub</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-12"><a class="doc-anchor" href="#examples-12">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">20</span>);
<span class="macro">assert_eq!</span>(foo.fetch_sub(<span class="number">10</span>, Ordering::SeqCst), <span class="number">20</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.sub" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.sub" class="fn">sub</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Subtracts from the current value.</p>
<p>This operation wraps around on overflow.</p>
<p>Unlike <code>fetch_sub</code>, this does not return the previous value.</p>
<p><code>sub</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_sub</code> on some platforms.</p>
<ul>
<li>MSP430: <code>sub</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<h5 id="examples-13"><a class="doc-anchor" href="#examples-13">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">20</span>);
foo.sub(<span class="number">10</span>, Ordering::SeqCst);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">10</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_and" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_and" class="fn">fetch_and</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Bitwise “and” with the current value.</p>
<p>Performs a bitwise “and” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_and</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-14"><a class="doc-anchor" href="#examples-14">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.fetch_and(<span class="number">0b110011</span>, Ordering::SeqCst), <span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b100001</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.and" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.and" class="fn">and</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Bitwise “and” with the current value.</p>
<p>Performs a bitwise “and” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Unlike <code>fetch_and</code>, this does not return the previous value.</p>
<p><code>and</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_and</code> on some platforms.</p>
<ul>
<li>x86/x86_64: <code>lock and</code> instead of <code>cmpxchg</code> loop ({8,16,32}-bit atomics on x86, but additionally 64-bit atomics on x86_64)</li>
<li>MSP430: <code>and</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<p>Note: On x86/x86_64, the use of either function should not usually
affect the generated code, because LLVM can properly optimize the case
where the result is unused.</p>
<h5 id="examples-15"><a class="doc-anchor" href="#examples-15">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.fetch_and(<span class="number">0b110011</span>, Ordering::SeqCst), <span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b100001</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_nand" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_nand" class="fn">fetch_nand</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Bitwise “nand” with the current value.</p>
<p>Performs a bitwise “nand” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_nand</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-16"><a class="doc-anchor" href="#examples-16">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0x13</span>);
<span class="macro">assert_eq!</span>(foo.fetch_nand(<span class="number">0x31</span>, Ordering::SeqCst), <span class="number">0x13</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), !(<span class="number">0x13 </span>&amp; <span class="number">0x31</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_or" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_or" class="fn">fetch_or</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Bitwise “or” with the current value.</p>
<p>Performs a bitwise “or” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_or</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-17"><a class="doc-anchor" href="#examples-17">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.fetch_or(<span class="number">0b110011</span>, Ordering::SeqCst), <span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b111111</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.or" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.or" class="fn">or</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Bitwise “or” with the current value.</p>
<p>Performs a bitwise “or” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Unlike <code>fetch_or</code>, this does not return the previous value.</p>
<p><code>or</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_or</code> on some platforms.</p>
<ul>
<li>x86/x86_64: <code>lock or</code> instead of <code>cmpxchg</code> loop ({8,16,32}-bit atomics on x86, but additionally 64-bit atomics on x86_64)</li>
<li>MSP430: <code>or</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<p>Note: On x86/x86_64, the use of either function should not usually
affect the generated code, because LLVM can properly optimize the case
where the result is unused.</p>
<h5 id="examples-18"><a class="doc-anchor" href="#examples-18">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.fetch_or(<span class="number">0b110011</span>, Ordering::SeqCst), <span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b111111</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_xor" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_xor" class="fn">fetch_xor</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Bitwise “xor” with the current value.</p>
<p>Performs a bitwise “xor” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_xor</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-19"><a class="doc-anchor" href="#examples-19">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.fetch_xor(<span class="number">0b110011</span>, Ordering::SeqCst), <span class="number">0b101101</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b011110</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.xor" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.xor" class="fn">xor</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Bitwise “xor” with the current value.</p>
<p>Performs a bitwise “xor” operation on the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Unlike <code>fetch_xor</code>, this does not return the previous value.</p>
<p><code>xor</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_xor</code> on some platforms.</p>
<ul>
<li>x86/x86_64: <code>lock xor</code> instead of <code>cmpxchg</code> loop ({8,16,32}-bit atomics on x86, but additionally 64-bit atomics on x86_64)</li>
<li>MSP430: <code>xor</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<p>Note: On x86/x86_64, the use of either function should not usually
affect the generated code, because LLVM can properly optimize the case
where the result is unused.</p>
<h5 id="examples-20"><a class="doc-anchor" href="#examples-20">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b101101</span>);
foo.xor(<span class="number">0b110011</span>, Ordering::SeqCst);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">0b011110</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_update" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_update" class="fn">fetch_update</a>&lt;F&gt;(
&amp;self,
set_order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
fetch_order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>,
f: F,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>&gt;<div class="where">where
F: <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>&gt;,</div></h4></section></summary><div class="docblock"><p>Fetches the value, and applies a function to it that returns an optional
new value. Returns a <code>Result</code> of <code>Ok(previous_value)</code> if the function returned <code>Some(_)</code>, else
<code>Err(previous_value)</code>.</p>
<p>Note: This may call the function multiple times if the value has been changed from other threads in
the meantime, as long as the function returns <code>Some(_)</code>, but the function will have been applied
only once to the stored value.</p>
<p><code>fetch_update</code> takes two <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> arguments to describe the memory ordering of this operation.
The first describes the required ordering for when the operation finally succeeds while the second
describes the required ordering for loads. These correspond to the success and failure orderings of
<a href="struct.AtomicU64.html#method.compare_exchange" title="method portable_atomic::AtomicU64::compare_exchange"><code>compare_exchange</code></a> respectively.</p>
<p>Using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> as success ordering makes the store part
of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the final successful load
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>. The (failed) load ordering can only be <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.SeqCst" title="variant core::sync::atomic::Ordering::SeqCst"><code>SeqCst</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> or <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="panics-4"><a class="doc-anchor" href="#panics-4">§</a>Panics</h5>
<p>Panics if <code>fetch_order</code> is <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a>, <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.AcqRel" title="variant core::sync::atomic::Ordering::AcqRel"><code>AcqRel</code></a>.</p>
<h5 id="considerations"><a class="doc-anchor" href="#considerations">§</a>Considerations</h5>
<p>This method is not magic; it is not provided by the hardware.
It is implemented in terms of <a href="struct.AtomicU64.html#method.compare_exchange_weak" title="method portable_atomic::AtomicU64::compare_exchange_weak"><code>compare_exchange_weak</code></a>,
and suffers from the same drawbacks.
In particular, this method will not circumvent the <a href="https://en.wikipedia.org/wiki/ABA_problem">ABA Problem</a>.</p>
<h5 id="examples-21"><a class="doc-anchor" href="#examples-21">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>x = AtomicU64::new(<span class="number">7</span>);
<span class="macro">assert_eq!</span>(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |<span class="kw">_</span>| <span class="prelude-val">None</span>), <span class="prelude-val">Err</span>(<span class="number">7</span>));
<span class="macro">assert_eq!</span>(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |x| <span class="prelude-val">Some</span>(x + <span class="number">1</span>)), <span class="prelude-val">Ok</span>(<span class="number">7</span>));
<span class="macro">assert_eq!</span>(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |x| <span class="prelude-val">Some</span>(x + <span class="number">1</span>)), <span class="prelude-val">Ok</span>(<span class="number">8</span>));
<span class="macro">assert_eq!</span>(x.load(Ordering::SeqCst), <span class="number">9</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_max" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_max" class="fn">fetch_max</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Maximum with the current value.</p>
<p>Finds the maximum of the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_max</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-22"><a class="doc-anchor" href="#examples-22">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.fetch_max(<span class="number">42</span>, Ordering::SeqCst), <span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::SeqCst), <span class="number">42</span>);</code></pre></div>
<p>If you want to obtain the maximum value in one step, you can use the following:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">23</span>);
<span class="kw">let </span>bar = <span class="number">42</span>;
<span class="kw">let </span>max_foo = foo.fetch_max(bar, Ordering::SeqCst).max(bar);
<span class="macro">assert!</span>(max_foo == <span class="number">42</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_min" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_min" class="fn">fetch_min</a>(&amp;self, val: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Minimum with the current value.</p>
<p>Finds the minimum of the current value and the argument <code>val</code>, and
sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_min</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-23"><a class="doc-anchor" href="#examples-23">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.fetch_min(<span class="number">42</span>, Ordering::Relaxed), <span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.fetch_min(<span class="number">22</span>, Ordering::Relaxed), <span class="number">23</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">22</span>);</code></pre></div>
<p>If you want to obtain the minimum value in one step, you can use the following:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">23</span>);
<span class="kw">let </span>bar = <span class="number">12</span>;
<span class="kw">let </span>min_foo = foo.fetch_min(bar, Ordering::SeqCst).min(bar);
<span class="macro">assert_eq!</span>(min_foo, <span class="number">12</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.bit_set" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.bit_set" class="fn">bit_set</a>(&amp;self, bit: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u32.html">u32</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Sets the bit at the specified bit-position to 1.</p>
<p>Returns <code>true</code> if the specified bit was previously set to 1.</p>
<p><code>bit_set</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This corresponds to x86’s <code>lock bts</code>, and the implementation calls them on x86/x86_64.</p>
<h5 id="examples-24"><a class="doc-anchor" href="#examples-24">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b0000</span>);
<span class="macro">assert!</span>(!foo.bit_set(<span class="number">0</span>, Ordering::Relaxed));
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">0b0001</span>);
<span class="macro">assert!</span>(foo.bit_set(<span class="number">0</span>, Ordering::Relaxed));
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">0b0001</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.bit_clear" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.bit_clear" class="fn">bit_clear</a>(&amp;self, bit: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u32.html">u32</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Clears the bit at the specified bit-position to 1.</p>
<p>Returns <code>true</code> if the specified bit was previously set to 1.</p>
<p><code>bit_clear</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This corresponds to x86’s <code>lock btr</code>, and the implementation calls them on x86/x86_64.</p>
<h5 id="examples-25"><a class="doc-anchor" href="#examples-25">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b0001</span>);
<span class="macro">assert!</span>(foo.bit_clear(<span class="number">0</span>, Ordering::Relaxed));
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">0b0000</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.bit_toggle" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.bit_toggle" class="fn">bit_toggle</a>(&amp;self, bit: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u32.html">u32</a>, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Toggles the bit at the specified bit-position.</p>
<p>Returns <code>true</code> if the specified bit was previously set to 1.</p>
<p><code>bit_toggle</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This corresponds to x86’s <code>lock btc</code>, and the implementation calls them on x86/x86_64.</p>
<h5 id="examples-26"><a class="doc-anchor" href="#examples-26">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0b0000</span>);
<span class="macro">assert!</span>(!foo.bit_toggle(<span class="number">0</span>, Ordering::Relaxed));
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">0b0001</span>);
<span class="macro">assert!</span>(foo.bit_toggle(<span class="number">0</span>, Ordering::Relaxed));
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">0b0000</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_not" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_not" class="fn">fetch_not</a>(&amp;self, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Logical negates the current value, and sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_not</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-27"><a class="doc-anchor" href="#examples-27">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0</span>);
<span class="macro">assert_eq!</span>(foo.fetch_not(Ordering::Relaxed), <span class="number">0</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), !<span class="number">0</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.not" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.not" class="fn">not</a>(&amp;self, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Logical negates the current value, and sets the new value to the result.</p>
<p>Unlike <code>fetch_not</code>, this does not return the previous value.</p>
<p><code>not</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_not</code> on some platforms.</p>
<ul>
<li>x86/x86_64: <code>lock not</code> instead of <code>cmpxchg</code> loop ({8,16,32}-bit atomics on x86, but additionally 64-bit atomics on x86_64)</li>
<li>MSP430: <code>inv</code> instead of disabling interrupts ({8,16}-bit atomics)</li>
</ul>
<h5 id="examples-28"><a class="doc-anchor" href="#examples-28">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">0</span>);
foo.not(Ordering::Relaxed);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), !<span class="number">0</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.fetch_neg" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.fetch_neg" class="fn">fetch_neg</a>(&amp;self, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Negates the current value, and sets the new value to the result.</p>
<p>Returns the previous value.</p>
<p><code>fetch_neg</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<h5 id="examples-29"><a class="doc-anchor" href="#examples-29">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">5</span>);
<span class="macro">assert_eq!</span>(foo.fetch_neg(Ordering::Relaxed), <span class="number">5</span>);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">5_u64</span>.wrapping_neg());
<span class="macro">assert_eq!</span>(foo.fetch_neg(Ordering::Relaxed), <span class="number">5_u64</span>.wrapping_neg());
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.neg" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub fn <a href="#method.neg" class="fn">neg</a>(&amp;self, order: <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering">Ordering</a>)</h4></section></summary><div class="docblock"><p>Negates the current value, and sets the new value to the result.</p>
<p>Unlike <code>fetch_neg</code>, this does not return the previous value.</p>
<p><code>neg</code> takes an <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html" title="enum core::sync::atomic::Ordering"><code>Ordering</code></a> argument which describes the memory ordering
of this operation. All ordering modes are possible. Note that using
<a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Acquire" title="variant core::sync::atomic::Ordering::Acquire"><code>Acquire</code></a> makes the store part of this operation <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>, and
using <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Release" title="variant core::sync::atomic::Ordering::Release"><code>Release</code></a> makes the load part <a href="https://doc.rust-lang.org/1.82.0/core/sync/atomic/enum.Ordering.html#variant.Relaxed" title="variant core::sync::atomic::Ordering::Relaxed"><code>Relaxed</code></a>.</p>
<p>This function may generate more efficient code than <code>fetch_neg</code> on some platforms.</p>
<ul>
<li>x86/x86_64: <code>lock neg</code> instead of <code>cmpxchg</code> loop ({8,16,32}-bit atomics on x86, but additionally 64-bit atomics on x86_64)</li>
</ul>
<h5 id="examples-30"><a class="doc-anchor" href="#examples-30">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>portable_atomic::{AtomicU64, Ordering};
<span class="kw">let </span>foo = AtomicU64::new(<span class="number">5</span>);
foo.neg(Ordering::Relaxed);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">5_u64</span>.wrapping_neg());
foo.neg(Ordering::Relaxed);
<span class="macro">assert_eq!</span>(foo.load(Ordering::Relaxed), <span class="number">5</span>);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.as_ptr" class="method"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><h4 class="code-header">pub const fn <a href="#method.as_ptr" class="fn">as_ptr</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.pointer.html">*mut </a><a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a></h4></section></summary><div class="docblock"><p>Returns a mutable pointer to the underlying integer.</p>
<p>Returning an <code>*mut</code> pointer from a shared reference to this atomic is
safe because the atomic types work with interior mutability. Any use of
the returned raw pointer requires an <code>unsafe</code> block and has to uphold
the safety requirements. If there is concurrent access, note the following
additional safety requirements:</p>
<ul>
<li>If this atomic type is <a href="struct.AtomicU64.html#method.is_lock_free" title="associated function portable_atomic::AtomicU64::is_lock_free">lock-free</a>, any concurrent
operations on it must be atomic.</li>
<li>Otherwise, any concurrent operations on it must be compatible with
operations performed by this atomic type.</li>
</ul>
<p>This is <code>const fn</code> on Rust 1.58+.</p>
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-AtomicU64" class="impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#impl-Debug-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.82.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.82.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.82.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-AtomicU64" class="impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#impl-Default-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -&gt; Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.82.0/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-From%3Cu64%3E-for-AtomicU64" class="impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#impl-From%3Cu64%3E-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>&gt; for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(v: <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u64.html">u64</a>) -&gt; Self</h4></section></summary><div class='docblock'>Converts to this type from the input type.</div></details></div></details><section id="impl-RefUnwindSafe-for-AtomicU64" class="impl"><a class="src rightside" href="../src/portable_atomic/lib.rs.html#4612-4613">source</a><a href="#impl-RefUnwindSafe-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-AtomicU64" class="impl"><a href="#impl-Freeze-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section><section id="impl-Send-for-AtomicU64" class="impl"><a href="#impl-Send-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section><section id="impl-Sync-for-AtomicU64" class="impl"><a href="#impl-Sync-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section><section id="impl-Unpin-for-AtomicU64" class="impl"><a href="#impl-Unpin-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section><section id="impl-UnwindSafe-for-AtomicU64" class="impl"><a href="#impl-UnwindSafe-for-AtomicU64" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.AtomicU64.html" title="struct portable_atomic::AtomicU64">AtomicU64</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/any.rs.html#138">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/any.rs.html#139">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.82.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.82.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/borrow.rs.html#209">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/borrow.rs.html#211">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/borrow.rs.html#217">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.82.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/borrow.rs.html#218">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.82.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from-1" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from-1" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#809">source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#794">source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.82.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.82.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
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