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<p class='location'>Struct CpuPool</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.new_num_cpus">new_num_cpus</a><a href="#method.spawn">spawn</a><a href="#method.spawn_fn">spawn_fn</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Executor%3CF%3E">Executor<F></a><a href="#impl-Clone">Clone</a><a href="#impl-Drop">Drop</a></div></div><p class='location'><a href='index.html'>futures_cpupool</a></p><script>window.sidebarCurrent = {name: 'CpuPool', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>futures_cpupool</a>::<wbr><a class="struct" href=''>CpuPool</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../src/futures_cpupool/lib.rs.html#73-75' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct CpuPool { /* fields omitted */ }</pre><div class='docblock'><p>A thread pool intended to run CPU intensive work.</p>
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<p>This thread pool will hand out futures representing the completed work
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that happens on the thread pool itself, and the futures can then be later
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composed with other work as part of an overall computation.</p>
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<p>The worker threads associated with a thread pool are kept alive so long as
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there is an open handle to the <code>CpuPool</code> or there is work running on them. Once
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all work has been drained and all references have gone away the worker
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threads will be shut down.</p>
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<p>Currently <code>CpuPool</code> implements <code>Clone</code> which just clones a new reference to
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the underlying thread pool.</p>
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<p><strong>Note:</strong> if you use CpuPool inside a library it's better accept a
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<code>Builder</code> object for thread configuration rather than configuring just
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pool size. This not only future proof for other settings but also allows
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user to attach monitoring tools to lifecycle hooks.</p>
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</div>
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<h2 id='methods' class='small-section-header'>
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Methods<a href='#methods' class='anchor'></a>
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</h2>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#139-236' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>pub fn <a href='#method.new' class='fnname'>new</a>(size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#159-161' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Creates a new thread pool with <code>size</code> worker threads associated with it.</p>
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<p>The returned handle can use <code>execute</code> to run work on this thread pool,
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and clones can be made of it to get multiple references to the same
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thread pool.</p>
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<p>This is a shortcut for:</p>
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<pre class="rust rust-example-rendered">
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<span class="ident">Builder</span>::<span class="ident">new</span>().<span class="ident">pool_size</span>(<span class="ident">size</span>).<span class="ident">create</span>()</pre>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>Panics if <code>size == 0</code>.</p>
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</div><h4 id='method.new_num_cpus' class="method"><span id='new_num_cpus.v' class='invisible'><code>pub fn <a href='#method.new_num_cpus' class='fnname'>new_num_cpus</a>() -> <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#175-177' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Creates a new thread pool with a number of workers equal to the number
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of CPUs on the host.</p>
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<p>This is a shortcut for:</p>
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<pre class="rust rust-example-rendered">
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<span class="ident">Builder</span>::<span class="ident">new</span>().<span class="ident">create</span>()</pre>
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</div><h4 id='method.spawn' class="method"><span id='spawn.v' class='invisible'><code>pub fn <a href='#method.spawn' class='fnname'>spawn</a><F>(&self, f: F) -> <a class="struct" href="../futures_cpupool/struct.CpuFuture.html" title="struct futures_cpupool::CpuFuture">CpuFuture</a><F::<a class="type" href="../futures/future/trait.Future.html#associatedtype.Item" title="type futures::future::Future::Item">Item</a>, F::<a class="type" href="../futures/future/trait.Future.html#associatedtype.Error" title="type futures::future::Future::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="../futures/future/trait.Future.html" title="trait futures::future::Future">Future</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static,<br> F::<a class="type" href="../futures/future/trait.Future.html#associatedtype.Item" title="type futures::future::Future::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static,<br> F::<a class="type" href="../futures/future/trait.Future.html#associatedtype.Error" title="type futures::future::Future::Error">Error</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#199-216' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Spawns a future to run on this thread pool, returning a future
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representing the produced value.</p>
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<p>This function will execute the future <code>f</code> on the associated thread
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pool, and return a future representing the finished computation. The
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returned future serves as a proxy to the computation that <code>F</code> is
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running.</p>
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<p>To simply run an arbitrary closure on a thread pool and extract the
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result, you can use the <code>future::lazy</code> combinator to defer work to
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executing on the thread pool itself.</p>
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<p>Note that if the future <code>f</code> panics it will be caught by default and the
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returned future will propagate the panic. That is, panics will not tear
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down the thread pool and will be propagated to the returned future's
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<code>poll</code> method if queried.</p>
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<p>If the returned future is dropped then this <code>CpuPool</code> will attempt to
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cancel the computation, if possible. That is, if the computation is in
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the middle of working, it will be interrupted when possible.</p>
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</div><h4 id='method.spawn_fn' class="method"><span id='spawn_fn.v' class='invisible'><code>pub fn <a href='#method.spawn_fn' class='fnname'>spawn_fn</a><F, R>(&self, f: F) -> <a class="struct" href="../futures_cpupool/struct.CpuFuture.html" title="struct futures_cpupool::CpuFuture">CpuFuture</a><R::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Item" title="type futures::future::IntoFuture::Item">Item</a>, R::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Error" title="type futures::future::IntoFuture::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> R + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static,<br> R: <a class="trait" href="../futures/future/trait.IntoFuture.html" title="trait futures::future::IntoFuture">IntoFuture</a> + 'static,<br> R::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Future" title="type futures::future::IntoFuture::Future">Future</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static,<br> R::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Item" title="type futures::future::IntoFuture::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static,<br> R::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Error" title="type futures::future::IntoFuture::Error">Error</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#227-235' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Spawns a closure on this thread pool.</p>
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<p>This function is a convenience wrapper around the <code>spawn</code> function above
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for running a closure wrapped in <code>future::lazy</code>. It will spawn the
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function <code>f</code> provided onto the thread pool, and continue to run the
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future returned by <code>f</code> on the thread pool as well.</p>
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<p>The returned future will be a handle to the result produced by the
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future that <code>f</code> returns.</p>
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</div></div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#105-111' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#106-110' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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</div></div><h3 id='impl-Executor%3CF%3E' class='impl'><span class='in-band'><code>impl<F> <a class="trait" href="../futures/future/trait.Executor.html" title="trait futures::future::Executor">Executor</a><F> for <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a> <span class="where fmt-newline">where<br> F: <a class="trait" href="../futures/future/trait.Future.html" title="trait futures::future::Future">Future</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Error = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + 'static, </span></code><a href='#impl-Executor%3CF%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#238-245' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.execute' class="method"><span id='execute.v' class='invisible'><code>fn <a href='../futures/future/trait.Executor.html#tymethod.execute' class='fnname'>execute</a>(&self, future: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../futures/future/struct.ExecuteError.html" title="struct futures::future::ExecuteError">ExecuteError</a><F>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#241-244' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Spawns a future to run on this <code>Executor</code>, typically in the "background". <a href="../futures/future/trait.Executor.html#tymethod.execute">Read more</a></p>
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</div></div><h3 id='impl-Clone' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code><a href='#impl-Clone' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#265-270' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#266-269' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code></span><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#112-114' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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</div></div><h3 id='impl-Drop' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="../futures_cpupool/struct.CpuPool.html" title="struct futures_cpupool::CpuPool">CpuPool</a></code><a href='#impl-Drop' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#272-280' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop' class='fnname'>drop</a>(&mut self)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/futures_cpupool/lib.rs.html#273-279' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Executes the destructor for this type. <a href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></p>
|
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</div></div></section>
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<section id='search' class="content hidden"></section>
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<section class="footer"></section>
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<aside id="help" class="hidden">
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<div>
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<h1 class="hidden">Help</h1>
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<div class="shortcuts">
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<h2>Keyboard Shortcuts</h2>
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<dl>
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<dt><kbd>?</kbd></dt>
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<dd>Show this help dialog</dd>
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<dt><kbd>S</kbd></dt>
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<dd>Focus the search field</dd>
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<dt><kbd>↑</kbd></dt>
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<dd>Move up in search results</dd>
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<dt><kbd>↓</kbd></dt>
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<dd>Move down in search results</dd>
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<dt><kbd>↹</kbd></dt>
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<dd>Switch tab</dd>
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<dt><kbd>⏎</kbd></dt>
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<dd>Go to active search result</dd>
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<dt><kbd>+</kbd></dt>
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<dt><kbd>-</kbd></dt>
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<dd>Collapse all sections</dd>
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</dl>
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</div>
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<div class="infos">
|
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|
|
<h2>Search Tricks</h2>
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|||
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|
|||
|
|
<p>
|
|||
|
|
Prefix searches with a type followed by a colon (e.g.
|
|||
|
|
<code>fn:</code>) to restrict the search to a given type.
|
|||
|
|
</p>
|
|||
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|
|
|||
|
|
<p>
|
|||
|
|
Accepted types are: <code>fn</code>, <code>mod</code>,
|
|||
|
|
<code>struct</code>, <code>enum</code>,
|
|||
|
|
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
|||
|
|
and <code>const</code>.
|
|||
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|
</p>
|
|||
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|
|||
|
|
<p>
|
|||
|
|
Search functions by type signature (e.g.
|
|||
|
|
<code>vec -> usize</code> or <code>* -> vec</code>)
|
|||
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</p>
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</div>
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</div>
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