<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `ThreadPoolBuilder` struct in crate `rayon`."><metaname="keywords"content="rust, rustlang, rust-lang, ThreadPoolBuilder"><title>rayon::ThreadPoolBuilder - Rust</title><linkrel="stylesheet"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../dark.css"><linkrel="stylesheet"type="text/css"href="../light.css"id="themeStyle"><scriptsrc="../storage.js"></script><noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="shortcut icon"href="../favicon.ico"><styletype="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><bodyclass="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><ahref='../rayon/index.html'><divclass='logo-container'><imgsrc='../rust-logo.png'alt='logo'></div></a><pclass='location'>Struct ThreadPoolBuilder</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#methods">Methods</a><divclass="sidebar-links"><ahref="#method.breadth_first">breadth_first</a><ahref="#method.build">build</a><ahref="#method.build_global">build_global</a><ahref="#method.build_scoped">build_scoped</a><ahref="#method.exit_handler">exit_handler</a><ahref="#method.new">new</a><ahref="#method.num_threads">num_threads</a><ahref="#method.panic_handler">panic_handler</a><ahref="#method.spawn_handler">spawn_handler</a><ahref="#method.stack_size">stack_size</a><ahref="#method.start_handler">start_handler</a><ahref="#method.thread_name">thread_name</a></div><aclass="sidebar-title"href="#implementations">Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-Debug">Debug</a><ahref="#impl-Default">Default</a></div><aclass="sidebar-title"href="#synthetic-implementations">Auto Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-RefUnwindSafe">!RefUnwindSafe</a><ahref="#impl-Send">!Send</a><ahref="#impl-Sync">!Sync</a><ahref="#impl-Unpin">Unpin</a><ahref="#impl-UnwindSafe">!UnwindSafe</a></div><aclass="sidebar-title"href="#blanket-implementations">Blanket Implementations</a><divclass="sidebar-links"><ahref="#impl-Any">Any</a><ahref="#impl-Borrow%3CT%3E">Borrow<T></a><ahref="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><ahref="#impl-From%3CT%3E">From<T></a><ahref="#impl-Into%3CU%3E">Into<U></a><ahref="#impl-TryFrom%3CU%3E">TryFrom<U></a><ahref="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><pclass='location'><ahref='index.html'>rayon</a></p><script>window.sidebarCurrent={name:'ThreadPoolBuilder',ty:'struct',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><aid="settings-menu"href="../settings.html"><imgsrc="../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../src/rayon_core/lib.rs.html#132-161'title='g
<h2id="creating-a-threadpool"class="section-header"><ahref="#creating-a-threadpool">Creating a ThreadPool</a></h2>
<p>The following creates a thread pool with 22 threads.</p>
</div><h2id='methods'class='small-section-header'>Methods<ahref='#methods'class='anchor'></a></h2><h3id='impl'class='impl'><codeclass='in-band'>impl <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><DefaultSpawn></code><ahref='#impl'class='anchor'></a><aclass='srclink'href='../src/rayon_core/lib.rs.html#201-206'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.new'class="method"><codeid='new.v'>pub fn <ahref='#method.new'class='fnname'>new</a>() -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><DefaultSpawn></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#203-205'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Creates and returns a valid rayon thread pool builder, but does not initialize it.</p>
</div></div><h3id='impl-1'class='impl'><codeclass='in-band'>impl<S><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> S: ThreadSpawn, </span></code><ahref='#impl-1'class='anchor'></a><aclass='srclink'href='../src/rayon_core/lib.rs.html#210-241'title='goto source code'>[src]</a></h3><divclass='docblock'><p>Note: the <code>S: ThreadSpawn</code> constraint is an internal implementation detail for the
default spawn and those set by <ahref="#method.spawn_handler"><code>spawn_handler</code></a>.</p>
</div><divclass='impl-items'><h4id='method.build'class="method"><codeid='build.v'>pub fn <ahref='#method.build'class='fnname'>build</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="struct"href="../rayon/struct.ThreadPool.html"title="struct rayon::ThreadPool">ThreadPool</a>, <aclass="struct"href="../rayon/struct.ThreadPoolBuildError.html"title="struct rayon::ThreadPoolBuildError">ThreadPoolBuildError</a>></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#215-217'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Create a new <code>ThreadPool</code> initialized using this configuration.</p>
</div><h4id='method.build_global'class="method"><codeid='build_global.v'>pub fn <ahref='#method.build_global'class='fnname'>build_global</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <aclass="struct"href="../rayon/struct.ThreadPoolBuildError.html"title="struct rayon::ThreadPoolBuildError">ThreadPoolBuildError</a>></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#236-240'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Initializes the global thread pool. This initialization is
<strong>optional</strong>. If you do not call this function, the thread pool
will be automatically initialized with the default
configuration. Calling <code>build_global</code> is not recommended, except
in two scenarios:</p>
<ul>
<li>You wish to change the default configuration.</li>
<li>You are running a benchmark, in which case initializing may
yield slightly more consistent results, since the worker threads
will already be ready to go even in the first iteration. But
this cost is minimal.</li>
</ul>
<p>Initialization of the global thread pool happens exactly
once. Once started, the configuration cannot be
changed. Therefore, if you call <code>build_global</code> a second time, it
will return an error. An <code>Ok</code> result indicates that this
is the first initialization of the thread pool.</p>
<p>This is a convenience function for building a pool using <ahref="https://docs.rs/crossbeam/0.7/crossbeam/fn.scope.html"><code>crossbeam::scope</code></a>
to spawn threads in a <ahref="#method.spawn_handler"><code>spawn_handler</code></a>.
The threads in this pool will start by calling <code>wrapper</code>, which should
do initialization and continue by calling <code>ThreadBuilder::run()</code>.</p>
<spanclass="ident">pool</span>.<spanclass="ident">install</span>(<spanclass="op">|</span><spanclass="op">|</span><spanclass="macro">println</span><spanclass="macro">!</span>(<spanclass="string">"Hello from my custom thread!"</span>));
<spanclass="prelude-val">Ok</span>(())
}</pre></div>
<p>The default spawn handler sets the name and stack size if given, and propagates
<spanclass="ident">pool</span>.<spanclass="ident">install</span>(<spanclass="op">|</span><spanclass="op">|</span><spanclass="macro">println</span><spanclass="macro">!</span>(<spanclass="string">"Hello from my fully custom thread!"</span>));
<spanclass="prelude-val">Ok</span>(())
}</pre></div>
</div><h4id='method.thread_name'class="method"><codeid='thread_name.v'>pub fn <ahref='#method.thread_name'class='fnname'>thread_name</a><F>(self, closure: F) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> F: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html"title="trait core::ops::function::FnMut">FnMut</a>(<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -><aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html"title="struct alloc::string::String">String</a> + 'static, </span></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#424-430'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Set a closure which takes a thread index and returns
the thread's name.</p>
</div><h4id='method.num_threads'class="method"><codeid='num_threads.v'>pub fn <ahref='#method.num_threads'class='fnname'>num_threads</a>(self, num_threads: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#458-461'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Set the number of threads to be used in the rayon threadpool.</p>
<p>If you specify a non-zero number of threads using this
function, then the resulting thread-pools are guaranteed to
start at most this number of threads.</p>
<p>If <code>num_threads</code> is 0, or you do not call this function, then
the Rayon runtime will select the number of threads
change to dynamically add or remove threads as needed.</p>
<p><strong>Future compatibility warning:</strong> Given the default behavior
may change in the future, if you wish to rely on a fixed
number of threads, you should use this function to specify
that number. To reproduce the current default behavior, you
may wish to use the <ahref="https://crates.io/crates/num_cpus"><code>num_cpus</code>
crate</a> to query the number
of CPUs dynamically.</p>
<p><strong>Old environment variable:</strong><code>RAYON_NUM_THREADS</code> is a one-to-one
replacement of the now deprecated <code>RAYON_RS_NUM_CPUS</code> environment
variable. If both variables are specified, <code>RAYON_NUM_THREADS</code> will
be prefered.</p>
</div><h4id='method.panic_handler'class="method"><codeid='panic_handler.v'>pub fn <ahref='#method.panic_handler'class='fnname'>panic_handler</a><H>(self, panic_handler: H) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> H: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(<aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html"title="struct alloc::boxed::Box">Box</a><dyn <aclass="trait"href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html"title="trait core::any::Any">Any</a> + 'static + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a>>) + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> + 'static, </span></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#482-488'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Normally, whenever Rayon catches a panic, it tries to
propagate it to someplace sensible, to try and reflect the
semantics of sequential execution. But in some cases,
particularly with the <code>spawn()</code> APIs, there is no
obvious place where we should propagate the panic to.
In that case, this panic handler is invoked.</p>
<p>If no panic handler is set, the default is to abort the
process, under the principle that panics should not go
unobserved.</p>
<p>If the panic handler itself panics, this will abort the
process. To prevent this, wrap the body of your panic handler
in a call to <code>std::panic::catch_unwind()</code>.</p>
</div><h4id='method.stack_size'class="method"><codeid='stack_size.v'>pub fn <ahref='#method.stack_size'class='fnname'>stack_size</a>(self, stack_size: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#496-499'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Set the stack size of the worker threads</p>
</div><h4id='method.breadth_first'class="method"><codeid='breadth_first.v'>pub fn <ahref='#method.breadth_first'class='fnname'>breadth_first</a>(self) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#530-533'title='goto source code'>[src]</a></h4><divclass='stability'><divclass='stab deprecated'>Deprecated: <p>use <code>scope_fifo</code> and <code>spawn_fifo</code> for similar effect</p>
</div></div><divclass='docblock'><p><strong>(DEPRECATED)</strong> Suggest to worker threads that they execute
spawned jobs in a "breadth-first" fashion.</p>
<p>Typically, when a worker thread is idle or blocked, it will
attempt to execute the job from the <em>top</em> of its local deque of
work (i.e., the job most recently spawned). If this flag is set
to true, however, workers will prefer to execute in a
<em>breadth-first</em> fashion -- that is, they will search for jobs at
the <em>bottom</em> of their local deque. (At present, workers <em>always</em>
steal from the bottom of other worker's deques, regardless of
the setting of this flag.)</p>
<p>If you think of the tasks as a tree, where a parent task
spawns its children in the tree, then this flag loosely
corresponds to doing a breadth-first traversal of the tree,
whereas the default would be to do a depth-first traversal.</p>
<p><strong>Note that this is an "execution hint".</strong> Rayon's task
execution is highly dynamic and the precise order in which
independent tasks are executed is not intended to be
guaranteed.</p>
<p>This <code>breadth_first()</code> method is now deprecated per <ahref="https://github.com/rayon-rs/rfcs/blob/master/accepted/rfc0001-scope-scheduling.md">RFC #1</a>,
and in the future its effect may be removed. Consider using
<ahref="fn.scope_fifo.html"><code>scope_fifo()</code></a> for a similar effect.</p>
</div><h4id='method.start_handler'class="method"><codeid='start_handler.v'>pub fn <ahref='#method.start_handler'class='fnname'>start_handler</a><H>(self, start_handler: H) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> H: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> + 'static, </span></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#550-556'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Set a callback to be invoked on thread start.</p>
<p>The closure is passed the index of the thread on which it is invoked.
Note that this same closure may be invoked multiple times in parallel.
If this closure panics, the panic will be passed to the panic handler.
If that handler returns, then startup will continue normally.</p>
</div><h4id='method.exit_handler'class="method"><codeid='exit_handler.v'>pub fn <ahref='#method.exit_handler'class='fnname'>exit_handler</a><H>(self, exit_handler: H) -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> H: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html"title="trait core::ops::function::Fn">Fn</a>(<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> + 'static, </span></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#569-575'title='goto source code'>[src]</a></h4><divclass='docblock'><p>Set a callback to be invoked on thread exit.</p>
<p>The closure is passed the index of the thread on which it is invoked.
Note that this same closure may be invoked multiple times in parallel.
If this closure panics, the panic will be passed to the panic handler.
If that handler returns, then the thread will exit normally.</p>
</div></div><h2id='implementations'class='small-section-header'>Trait Implementations<ahref='#implementations'class='anchor'></a></h2><divid='implementations-list'><h3id='impl-Debug'class='impl'><codeclass='in-band'>impl<S><aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><ahref='#impl-Debug'class='anchor'></a><aclass='srclink'href='../src/rayon_core/lib.rs.html#685-721'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.fmt'class="method hidden"><codeid='fmt.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt'class='fnname'>fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a>) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Error.html"title="struct core::fmt::Error">Error</a>></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#686-720'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3id='impl-Default'class='impl'><codeclass='in-band'>impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html"title="trait core::default::Default">Default</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><DefaultSpawn></code><ahref='#impl-Default'class='anchor'></a><aclass='srclink'href='../src/rayon_core/lib.rs.html#186-199'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.default'class="method hidden"><codeid='default.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default'class='fnname'>default</a>() -><aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><DefaultSpawn></code><aclass='srclink'href='../src/rayon_core/lib.rs.html#187-198'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Returns the "default value" for a type. <ahref="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
</div></div></div><h2id='synthetic-implementations'class='small-section-header'>Auto Trait Implementations<ahref='#synthetic-implementations'class='anchor'></a></h2><divid='synthetic-implementations-list'><h3id='impl-Sync'class='impl'><codeclass='in-band'>impl<S = DefaultSpawn> !<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><ahref='#impl-Sync'class='anchor'></a></h3><divclass='impl-items'></div><h3id='impl-Send'class='impl'><codeclass='in-band'>impl<S = DefaultSpawn> !<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><ahref='#impl-Send'class='anchor'></a></h3><divclass='impl-items'></div><h3id='impl-Unpin'class='impl'><codeclass='in-band'>impl<S><aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html"title="trait core::marker::Unpin">Unpin</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S><spanclass="where fmt-newline">where<br> S: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html"title="trait core::marker::Unpin">Unpin</a>, </span></code><ahref='#impl-Unpin'class='anchor'></a></h3><divclass='impl-items'></div><h3id='impl-RefUnwindSafe'class='impl'><codeclass='in-band'>impl<S = DefaultSpawn> !<aclass="trait"href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html"title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><ahref='#impl-RefUnwindSafe'class='anchor'></a></h3><divclass='impl-items'></div><h3id='impl-UnwindSafe'class='impl'><codeclass='in-band'>impl<S = DefaultSpawn> !<aclass="trait"href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html"title="trait std::panic::UnwindSafe">UnwindSafe</a> for <aclass="struct"href="../rayon/struct.ThreadPoolBuilder.html"title="struct rayon::ThreadPoolBuilder">ThreadPoolBuilder</a><S></code><ahref='#impl-UnwindSafe'class='anchor'></a></h3><divclass='impl-items'></div></div><h2id='blanket-implementations'class='small-section-header'>Blanket Implementations<ahref='#blanket-implementations'class='anchor'></a></h2><divid='blanket-implementations-list'><h3id='impl-Into%3CU%3E'class='impl'><codeclass='in-band'>impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html"title="trait core::convert::From">From</a><T>, </span></code><ahref='#impl-Into%3CU%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#543-548'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.into'class="method hidden"><codeid='into.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into'class='fnname'>into</a>(self) -> U</code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#545-547'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3id='impl-From%3CT%3E'class='impl'><codeclass='in-band'>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for T</code><ahref='#impl-From%3CT%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#552-554'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.from'class="method hidden"><codeid='from.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from'class='fnname'>from</a>(t: T) -> T</code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#553'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3id='impl-TryFrom%3CU%3E'class='impl'><codeclass='in-band'>impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>, </span></code><ahref='#impl-TryFrom%3CU%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#571-577'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='associatedtype.Error'class="type"><codeid='Error.t'>type <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error'class="type">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></code></h4><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4id='method.try_from'class="method hidden"><codeid='try_from.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from'class='fnname'>try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#574-576'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3id='impl-TryInto%3CU%3E'class='impl'><codeclass='in-band'>impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>, </span></code><ahref='#impl-TryInto%3CU%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#559-566'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='associatedtype.Error-1'class="type"><codeid='Error.t-1'>type <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error'class="type">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></code></h4><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4id='method.try_into'class="method hidden"><codeid='try_into.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into'class='fnname'>try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/convert.rs.html#563-565'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3id='impl-BorrowMut%3CT%3E'class='impl'><codeclass='in-band'>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html"title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <spanclass="where fmt-newline">where<br> T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>, </span></code><ahref='#impl-BorrowMut%3CT%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#218-220'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.borrow_mut'class="method hidden"><codeid='borrow_mut.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut'class='fnname'>borrow_mut</a>(&mut self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#219'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Mutably borrows from an owned value. <ahref="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></div><h3id='impl-Borrow%3CT%3E'class='impl'><codeclass='in-band'>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html"title="trait core::borrow::Borrow">Borrow</a><T> for T <spanclass="where fmt-newline">where<br> T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>, </span></code><ahref='#impl-Borrow%3CT%3E'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213-215'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.borrow'class="method hidden"><codeid='borrow.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow'class='fnname'>borrow</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Immutably borrows from an owned value. <ahref="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></div><h3id='impl-Any'class='impl'><codeclass='in-band'>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html"title="trait core::any::Any">Any</a> for T <spanclass="where fmt-newline">where<br> T: 'static + ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>, </span></code><ahref='#impl-Any'class='anchor'></a><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#100-102'title='goto source code'>[src]</a></h3><divclass='impl-items'><h4id='method.type_id'class="method hidden"><codeid='type_id.v'>fn <ahref='https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id'class='fnname'>type_id</a>(&self) -><aclass="struct"href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html"title="struct core::any::TypeId">TypeId</a></code><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#101'title='goto source code'>[src]</a></h4><divclass='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <ahref="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
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