<!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="Represents a user created thread-pool."><meta name="keywords" content="rust, rustlang, rust-lang, ThreadPool"><title>ThreadPool in rayon - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../rayon/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><h2 class="location">Struct ThreadPool</h2><div class="sidebar-elems"><div class="block items"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><div class="sidebar-links"><a href="#method.current_num_threads">current_num_threads</a><a href="#method.current_thread_has_pending_tasks">current_thread_has_pending_tasks</a><a href="#method.current_thread_index">current_thread_index</a><a href="#method.in_place_scope">in_place_scope</a><a href="#method.in_place_scope_fifo">in_place_scope_fifo</a><a href="#method.install">install</a><a href="#method.join">join</a><a href="#method.new">new</a><a href="#method.scope">scope</a><a href="#method.scope_fifo">scope_fifo</a><a href="#method.spawn">spawn</a><a href="#method.spawn_fifo">spawn_fifo</a></div><h3 class="sidebar-title"><a href="#trait-implementations">Trait Implementations</a></h3><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Drop">Drop</a></div><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><div class="sidebar-links"><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">!UnwindSafe</a></div><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-Pointable">Pointable</a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><h2 class="location">Other items in<br><a href="index.html">rayon</a></h2><div id="sidebar-vars" data-name="ThreadPool" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Struct <a href="index.html">rayon</a>::<wbr><a class="struct" href="#">ThreadPool</a><button id="copy-path" onclick="copy_path(this)" title="copy path"><img src="../clipboard.svg" width="19" height="18" alt="Copy item import" title="Copy item import to clipboard"></button></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#52-54" title="goto source code">[src]</a></span></h1><div class="docblock type-decl"><pre class="rust struct">pub struct ThreadPool { /* fields omitted */ }</pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Represents a user created <a href="https://en.wikipedia.org/wiki/Thread_pool">thread-pool</a>.</p>
<p>Use a <a href="struct.ThreadPoolBuilder.html"><code>ThreadPoolBuilder</code></a> to specify the number and/or names of threads
in the pool. After calling <a href="struct.ThreadPoolBuilder.html#method.build"><code>ThreadPoolBuilder::build()</code></a>, you can then
execute functions explicitly within this <a href="struct.ThreadPool.html"><code>ThreadPool</code></a> using
<a href="struct.ThreadPool.html#method.install"><code>ThreadPool::install()</code></a>. By contrast, top level rayon functions
(like <code>join()</code>) will execute implicitly within the current thread-pool.</p>
<h2 id="creating-a-threadpool" class="section-header"><a href="#creating-a-threadpool">Creating a ThreadPool</a></h2>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">pool</span> <span class="op">=</span> <span class="ident">rayon::ThreadPoolBuilder::new</span>().<span class="ident">num_threads</span>(<span class="number">8</span>).<span class="ident">build</span>().<span class="ident">unwrap</span>();</pre></div>
<p><a href="struct.ThreadPool.html#method.install"><code>install()</code></a> executes a closure in one of the <code>ThreadPool</code>’s
threads. In addition, any other rayon operations called inside of <code>install()</code> will also
execute in the context of the <code>ThreadPool</code>.</p>
<p>When the <code>ThreadPool</code> is dropped, that’s a signal for the threads it manages to terminate,
they will complete executing any remaining work that you have spawned, and automatically
terminate.</p>
</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><details class="rustdoc-toggle implementors-toggle" open><summary><div id="impl" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#56-280" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.new" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>(<br> configuration: <a class="struct" href="../rayon_core/struct.Configuration.html" title="struct rayon_core::Configuration">Configuration</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a>, <a class="struct" href="https://doc.rust-lang.org/1.54.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/1.54.0/std/error/trait.Error.html" title="trait std::error::Error">Error</a> + 'static, <a class="struct" href="https://doc.rust-lang.org/1.54.0/alloc/alloc/struct.Global.html" title="struct alloc::alloc::Global">Global</a>>></h4><a href="#method.new" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#60" title="goto source code">[src]</a></div><div class="item-info"><div class="stab deprecated"><span class="emoji">👎</span> Deprecated: <p>Use <code>ThreadPoolBuilder::build</code></p>
</div></div></summary><div class="docblock"><p>Deprecated in favor of <code>ThreadPoolBuilder::build</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.install" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.install" class="fnname">install</a><OP, R>(&self, op: OP) -> R <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> R + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h4><a href="#method.install" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#106-109" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Executes <code>op</code> within the threadpool. Any attempts to use
<code>join</code>, <code>scope</code>, or parallel iterators will then operate
within that threadpool.</p>
<h1 id="warning-thread-local-data" class="section-header"><a href="#warning-thread-local-data">Warning: thread-local data</a></h1>
<p>Because <code>op</code> is executing within the Rayon thread-pool,
thread-local data from the current thread will not be
accessible.</p>
<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
<p>If <code>op</code> should panic, that panic will be propagated.</p>
<h2 id="using-install" class="section-header"><a href="#using-install">Using <code>install()</code></a></h2>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">pool</span> <span class="op">=</span> <span class="ident">rayon::ThreadPoolBuilder::new</span>().<span class="ident">num_threads</span>(<span class="number">8</span>).<span class="ident">build</span>().<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">pool</span>.<span class="ident">install</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">fib</span>(<span class="number">20</span>));
<span class="macro">println!</span>(<span class="string">"{}"</span>, <span class="ident">n</span>);
}
<span class="kw">fn</span> <span class="ident">fib</span>(<span class="ident">n</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="kw">if</span> <span class="ident">n</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">|</span><span class="op">|</span> <span class="ident">n</span> <span class="op">=</span><span class="op">=</span> <span class="number">1</span> {
<span class="kw">return</span> <span class="ident">n</span>;
}
<span class="kw">let</span> (<span class="ident">a</span>, <span class="ident">b</span>) <span class="op">=</span> <span class="ident">rayon::join</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">fib</span>(<span class="ident">n</span> <span class="op">-</span> <span class="number">1</span>), <span class="op">|</span><span class="op">|</span> <span class="ident">fib</span>(<span class="ident">n</span> <span class="op">-</span> <span class="number">2</span>)); <span class="comment">// runs inside of `pool`</span>
<span class="kw">return</span> <span class="ident">a</span> <span class="op">+</span> <span class="ident">b</span>;
}</pre></div>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.current_num_threads" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.current_num_threads" class="fnname">current_num_threads</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a></h4><a href="#method.current_num_threads" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#126" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Returns the (current) number of threads in the thread pool.</p>
<h1 id="future-compatibility-note" class="section-header"><a href="#future-compatibility-note">Future compatibility note</a></h1>
<p>Note that unless this thread-pool was created with a
<a href="struct.ThreadPoolBuilder.html"><code>ThreadPoolBuilder</code></a> that specifies the number of threads,
then this number may vary over time in future versions (see <a href="struct.ThreadPoolBuilder.html#method.num_threads">the
<code>num_threads()</code> method for details</a>).</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.current_thread_index" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.current_thread_index" class="fnname">current_thread_index</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a>></h4><a href="#method.current_thread_index" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#151" title="goto source code">[src]</a></div></summary><div class="docblock"><p>If called from a Rayon worker thread in this thread-pool,
returns the index of that thread; if not called from a Rayon
thread, or called from a Rayon thread that belongs to a
different thread-pool, returns <code>None</code>.</p>
<p>The index for a given thread will not change over the thread’s
lifetime. However, multiple threads may share the same index if
they are in distinct thread-pools.</p>
<h1 id="future-compatibility-note-1" class="section-header"><a href="#future-compatibility-note-1">Future compatibility note</a></h1>
<p>Currently, every thread-pool (including the global
thread-pool) has a fixed number of threads, but this may
change in future Rayon versions (see <a href="struct.ThreadPoolBuilder.html#method.num_threads">the <code>num_threads()</code> method
for details</a>). In that case, the index for a
thread would not change during its lifetime, but thread
indices may wind up being reused if threads are terminated and
restarted.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.current_thread_has_pending_tasks" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.current_thread_has_pending_tasks" class="fnname">current_thread_has_pending_tasks</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.bool.html">bool</a>></h4><a href="#method.current_thread_has_pending_tasks" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#178" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Returns true if the current worker thread currently has “local
tasks” pending. This can be useful as part of a heuristic for
deciding whether to spawn a new task or execute code on the
current thread, particularly in breadth-first
schedulers. However, keep in mind that this is an inherently
racy check, as other worker threads may be actively “stealing”
tasks from our local deque.</p>
<p><strong>Background:</strong> Rayon’s uses a <a href="https://en.wikipedia.org/wiki/Work_stealing">work-stealing</a> scheduler. The
key idea is that each thread has its own <a href="https://en.wikipedia.org/wiki/Double-ended_queue">deque</a> of
tasks. Whenever a new task is spawned – whether through
<code>join()</code>, <code>Scope::spawn()</code>, or some other means – that new
task is pushed onto the thread’s <em>local</em> deque. Worker threads
have a preference for executing their own tasks; if however
they run out of tasks, they will go try to “steal” tasks from
other threads. This function therefore has an inherent race
with other active worker threads, which may be removing items
from the local deque.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.join" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.join" class="fnname">join</a><A, B, RA, RB>(&self, oper_a: A, oper_b: B) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.tuple.html">(</a>RA, RB<a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.tuple.html">)</a> <span class="where fmt-newline">where<br> A: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> RA + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> B: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> RB + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> RA: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> RB: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h4><a href="#method.join" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#186-191" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Execute <code>oper_a</code> and <code>oper_b</code> in the thread-pool and return
the results. Equivalent to <code>self.install(|| join(oper_a, oper_b))</code>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.scope" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.scope" class="fnname">scope</a><'scope, OP, R>(&self, op: OP) -> R <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&<a class="struct" href="struct.Scope.html" title="struct rayon::Scope">Scope</a><'scope>) -> R + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h4><a href="#method.scope" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#202-205" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Creates a scope that executes within this thread-pool.
Equivalent to <code>self.install(|| scope(...))</code>.</p>
<p>See also: <a href="fn.scope.html">the <code>scope()</code> function</a>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.scope_fifo" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.scope_fifo" class="fnname">scope_fifo</a><'scope, OP, R>(&self, op: OP) -> R <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&<a class="struct" href="struct.ScopeFifo.html" title="struct rayon::ScopeFifo">ScopeFifo</a><'scope>) -> R + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></h4><a href="#method.scope_fifo" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#217-220" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Creates a scope that executes within this thread-pool.
Spawns from the same thread are prioritized in relative FIFO order.
Equivalent to <code>self.install(|| scope_fifo(...))</code>.</p>
<p>See also: <a href="fn.scope_fifo.html">the <code>scope_fifo()</code> function</a>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.in_place_scope" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.in_place_scope" class="fnname">in_place_scope</a><'scope, OP, R>(&self, op: OP) -> R <span class="where fmt-newline">where<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&<a class="struct" href="struct.Scope.html" title="struct rayon::Scope">Scope</a><'scope>) -> R, </span></h4><a href="#method.in_place_scope" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#230-232" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Creates a scope that spawns work into this thread-pool.</p>
<p>See also: <a href="fn.in_place_scope.html">the <code>in_place_scope()</code> function</a>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.in_place_scope_fifo" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.in_place_scope_fifo" class="fnname">in_place_scope_fifo</a><'scope, OP, R>(&self, op: OP) -> R <span class="where fmt-newline">where<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&<a class="struct" href="struct.ScopeFifo.html" title="struct rayon::ScopeFifo">ScopeFifo</a><'scope>) -> R, </span></h4><a href="#method.in_place_scope_fifo" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#242-244" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Creates a scope that spawns work into this thread-pool in FIFO order.</p>
<p>See also: <a href="fn.in_place_scope_fifo.html">the <code>in_place_scope_fifo()</code> function</a>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.spawn" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.spawn" class="fnname">spawn</a><OP>(&self, op: OP) <span class="where fmt-newline">where<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static, </span></h4><a href="#method.spawn" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#257-259" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Spawns an asynchronous task in this thread-pool. This task will
run in the implicit, global scope, which means that it may outlast
the current stack frame – therefore, it cannot capture any references
onto the stack (you will likely need a <code>move</code> closure).</p>
<p>See also: <a href="struct.Scope.html#method.spawn">the <code>spawn()</code> function defined on scopes</a>.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.spawn_fifo" class="method has-srclink"><h4 class="code-header">pub fn <a href="#method.spawn_fifo" class="fnname">spawn_fifo</a><OP>(&self, op: OP) <span class="where fmt-newline">where<br> OP: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() + <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static, </span></h4><a href="#method.spawn_fifo" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#273-275" title="goto source code">[src]</a></div></summary><div class="docblock"><p>Spawns an asynchronous task in this thread-pool. This task will
run in the implicit, global scope, which means that it may outlast
the current stack frame – therefore, it cannot capture any references
onto the stack (you will likely need a <code>move</code> closure).</p>
<p>See also: <a href="struct.ScopeFifo.html#method.spawn_fifo">the <code>spawn_fifo()</code> function defined on scopes</a>.</p>
</div></details></div></details><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Debug" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-Debug" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#288-295" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.fmt" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, fmt: &mut <a class="struct" href="https://doc.rust-lang.org/1.54.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/1.54.0/core/fmt/struct.Error.html" title="struct core::fmt::Error">Error</a>></h4><a href="#method.fmt" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#289" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.54.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Drop" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-Drop" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#282-286" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.drop" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/ops/drop/trait.Drop.html#tymethod.drop" class="fnname">drop</a>(&mut self)</h4><a href="#method.drop" class="anchor"></a><a class="srclink" href="../src/rayon_core/thread_pool/mod.rs.html#283" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Executes the destructor for this type. <a href="https://doc.rust-lang.org/1.54.0/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></p>
</div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><div id="impl-RefUnwindSafe" class="impl has-srclink"><h3 class="code-header in-band">impl !<a class="trait" href="https://doc.rust-lang.org/1.54.0/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-RefUnwindSafe" class="anchor"></a></div><div id="impl-Send" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-Send" class="anchor"></a></div><div id="impl-Sync" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-Sync" class="anchor"></a></div><div id="impl-Unpin" class="impl has-srclink"><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-Unpin" class="anchor"></a></div><div id="impl-UnwindSafe" class="impl has-srclink"><h3 class="code-header in-band">impl !<a class="trait" href="https://doc.rust-lang.org/1.54.0/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.ThreadPool.html" title="struct rayon::ThreadPool">ThreadPool</a></h3><a href="#impl-UnwindSafe" class="anchor"></a></div></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Any" class="impl has-srclink"><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3><a href="#impl-Any" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/any.rs.html#131-135" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.type_id" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.54.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4><a href="#method.type_id" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/any.rs.html#132" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.54.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Borrow%3CT%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3><a href="#impl-Borrow%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/borrow.rs.html#208-213" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.borrow" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.reference.html">&</a>T</h4><a href="#method.borrow" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/borrow.rs.html#210" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-BorrowMut%3CT%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.54.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/borrow.rs.html#216-220" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.borrow_mut" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.reference.html">&mut </a>T</h4><a href="#method.borrow_mut" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/borrow.rs.html#217" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.54.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-From%3CT%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3><a href="#impl-From%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#544-548" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.from" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4><a href="#method.from" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#545" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Performs the conversion.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Into%3CU%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></h3><a href="#impl-Into%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#533-540" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><div id="method.into" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4><a href="#method.into" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#537" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Performs the conversion.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Pointable" class="impl has-srclink"><h3 class="code-header in-band">impl<T> <a class="trait" href="../crossbeam_epoch/atomic/trait.Pointable.html" title="trait crossbeam_epoch::atomic::Pointable">Pointable</a> for T</h3><a href="#impl-Pointable" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#194-214" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><div id="associatedconstant.ALIGN" class="associatedconstant trait-impl has-srclink"><h4 class="code-header">pub const <a href="../crossbeam_epoch/atomic/trait.Pointable.html#associatedconstant.ALIGN" class="constant"><b>ALIGN</b></a>: <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a></h4><a href="#associatedconstant.ALIGN" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#195" title="goto source code">[src]</a></div></summary><div class='docblock'><p>The alignment of pointer.</p>
</div></details><details class="rustdoc-toggle" open><summary><div id="associatedtype.Init" class="type trait-impl has-srclink"><h4 class="code-header">type <a href="../crossbeam_epoch/atomic/trait.Pointable.html#associatedtype.Init" class="type">Init</a> = T</h4><a href="#associatedtype.Init" class="anchor"></a></div></summary><div class='docblock'><p>The type for initializers.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.init" class="method trait-impl has-srclink"><h4 class="code-header">pub unsafe fn <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.init" class="fnname">init</a>(init: <T as <a class="trait" href="../crossbeam_epoch/atomic/trait.Pointable.html" title="trait crossbeam_epoch::atomic::Pointable">Pointable</a>>::<a class="type" href="../crossbeam_epoch/atomic/trait.Pointable.html#associatedtype.Init" title="type crossbeam_epoch::atomic::Pointable::Init">Init</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a></h4><a href="#method.init" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#199" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Initializes a with the given initializer. <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.init">Read more</a></p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.deref" class="method trait-impl has-srclink"><h4 class="code-header">pub unsafe fn <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.deref" class="fnname">deref</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.reference.html">&'a </a>T</h4><a href="#method.deref" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#203" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Dereferences the given pointer. <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.deref">Read more</a></p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.deref_mut" class="method trait-impl has-srclink"><h4 class="code-header">pub unsafe fn <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.deref_mut" class="fnname">deref_mut</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.reference.html">&'a mut </a>T</h4><a href="#method.deref_mut" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#207" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Mutably dereferences the given pointer. <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.deref_mut">Read more</a></p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.drop-1" class="method trait-impl has-srclink"><h4 class="code-header">pub unsafe fn <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.drop" class="fnname">drop</a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.usize.html">usize</a>)</h4><a href="#method.drop-1" class="anchor"></a><a class="srclink" href="../src/crossbeam_epoch/atomic.rs.html#211" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Drops the object pointed to by the given pointer. <a href="../crossbeam_epoch/atomic/trait.Pointable.html#tymethod.drop">Read more</a></p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-TryFrom%3CU%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></h3><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#581-590" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Error" class="type trait-impl has-srclink"><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4><a href="#associatedtype.Error" class="anchor"></a></div></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_from" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="type" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4><a href="#method.try_from" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#587" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Performs the conversion.</p>
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-TryInto%3CU%3E" class="impl has-srclink"><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3><a href="#impl-TryInto%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#567-576" title="goto source code">[src]</a></div></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Error-1" class="type trait-impl has-srclink"><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryInto.html#associatedtype.Error" class="type">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4><a href="#associatedtype.Error-1" class="anchor"></a></div></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><details class="rustdoc-toggle method-toggle" open><summary><div id="method.try_into" class="method trait-impl has-srclink"><h4 class="code-header">pub fn <a href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.54.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/1.54.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4><a href="#method.try_into" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/1.54.0/src/core/convert/mod.rs.html#573" title="goto source code">[src]</a></div></summary><div class='docblock'><p>Performs the conversion.</p>
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