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<p class='location'>Struct ThreadPool</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.spawn">spawn</a><a href="#method.sender">sender</a><a href="#method.sender_mut">sender_mut</a><a href="#method.shutdown_on_idle">shutdown_on_idle</a><a href="#method.shutdown">shutdown</a><a href="#method.shutdown_now">shutdown_now</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Drop">Drop</a></div></div><p class='location'><a href='index.html'>tokio_threadpool</a></p><script>window.sidebarCurrent = {name: 'ThreadPool', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>tokio_threadpool</a>::<wbr><a class="struct" href=''>ThreadPool</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#16-18' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct ThreadPool { /* fields omitted */ }</pre><div class='docblock'><p>Work-stealing based thread pool for executing futures.</p>
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<p>If a <code>ThreadPool</code> instance is dropped without explicitly being shutdown,
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<code>shutdown_now</code> is called implicitly, forcing all tasks that have not yet
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completed to be dropped.</p>
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<p>Create <code>ThreadPool</code> instances using <code>Builder</code>.</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="../tokio_threadpool/struct.ThreadPool.html" title="struct tokio_threadpool::ThreadPool">ThreadPool</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#20-124' 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>() -> <a class="struct" href="../tokio_threadpool/struct.ThreadPool.html" title="struct tokio_threadpool::ThreadPool">ThreadPool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#26-28' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Create a new <code>ThreadPool</code> with default values.</p>
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<p>Use <a href="struct.Builder.html"><code>Builder</code></a> for creating a configured thread pool.</p>
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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, future: F) <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></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#61-65' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Spawn a future onto the thread pool.</p>
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<p>This function takes ownership of the future and randomly assigns it to a
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worker thread. The thread will then start executing the future.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">futures</span>::<span class="ident">future</span>::{<span class="ident">Future</span>, <span class="ident">lazy</span>};
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<span class="comment">// Create a thread pool with default configuration values</span>
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<span class="kw">let</span> <span class="ident">thread_pool</span> <span class="op">=</span> <span class="ident">ThreadPool</span>::<span class="ident">new</span>();
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<span class="ident">thread_pool</span>.<span class="ident">spawn</span>(<span class="ident">lazy</span>(<span class="op">||</span> {
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"called from a worker thread"</span>);
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<span class="prelude-val">Ok</span>(())
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}));
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<span class="comment">// Gracefully shutdown the threadpool</span>
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<span class="ident">thread_pool</span>.<span class="ident">shutdown</span>().<span class="ident">wait</span>().<span class="ident">unwrap</span>();</pre>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>This function panics if the spawn fails. Use [<code>Sender::spawn</code>] for a
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version that returns a <code>Result</code> instead of panicking.</p>
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</div><h4 id='method.sender' class="method"><span id='sender.v' class='invisible'><code>pub fn <a href='#method.sender' class='fnname'>sender</a>(&self) -> &<a class="struct" href="../tokio_threadpool/struct.Sender.html" title="struct tokio_threadpool::Sender">Sender</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#71-73' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Return a reference to the sender handle</p>
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<p>The handle is used to spawn futures onto the thread pool. It also
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implements the <code>Executor</code> trait.</p>
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</div><h4 id='method.sender_mut' class="method"><span id='sender_mut.v' class='invisible'><code>pub fn <a href='#method.sender_mut' class='fnname'>sender_mut</a>(&mut self) -> &mut <a class="struct" href="../tokio_threadpool/struct.Sender.html" title="struct tokio_threadpool::Sender">Sender</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#76-78' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Return a mutable reference to the sender handle</p>
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</div><h4 id='method.shutdown_on_idle' class="method"><span id='shutdown_on_idle.v' class='invisible'><code>pub fn <a href='#method.shutdown_on_idle' class='fnname'>shutdown_on_idle</a>(self) -> <a class="struct" href="../tokio_threadpool/struct.Shutdown.html" title="struct tokio_threadpool::Shutdown">Shutdown</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#90-93' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Shutdown the pool once it becomes idle.</p>
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<p>Idle is defined as the completion of all futures that have been spawned
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onto the thread pool. There may still be outstanding handles when the
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thread pool reaches an idle state.</p>
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<p>Once the idle state is reached, calling <code>spawn</code> on any outstanding
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handle will result in an error. All worker threads are signaled and will
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shutdown. The returned future completes once all worker threads have
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completed the shutdown process.</p>
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</div><h4 id='method.shutdown' class="method"><span id='shutdown.v' class='invisible'><code>pub fn <a href='#method.shutdown' class='fnname'>shutdown</a>(self) -> <a class="struct" href="../tokio_threadpool/struct.Shutdown.html" title="struct tokio_threadpool::Shutdown">Shutdown</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#103-106' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Shutdown the pool</p>
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<p>This prevents the thread pool from accepting new tasks but will allow
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any existing tasks to complete.</p>
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<p>Calling <code>spawn</code> on any outstanding handle will result in an error. All
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worker threads are signaled and will shutdown. The returned future
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completes once all worker threads have completed the shutdown process.</p>
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</div><h4 id='method.shutdown_now' class="method"><span id='shutdown_now.v' class='invisible'><code>pub fn <a href='#method.shutdown_now' class='fnname'>shutdown_now</a>(self) -> <a class="struct" href="../tokio_threadpool/struct.Shutdown.html" title="struct tokio_threadpool::Shutdown">Shutdown</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#116-119' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Shutdown the pool immediately</p>
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<p>This will prevent the thread pool from accepting new tasks <strong>and</strong>
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abort any tasks that are currently running on the thread pool.</p>
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<p>Calling <code>spawn</code> on any outstanding handle will result in an error. All
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worker threads are signaled and will shutdown. The returned future
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completes once all worker threads have completed the shutdown process.</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="../tokio_threadpool/struct.ThreadPool.html" title="struct tokio_threadpool::ThreadPool">ThreadPool</a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#15' 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, __arg_0: &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/tokio_threadpool/thread_pool.rs.html#15' 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-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="../tokio_threadpool/struct.ThreadPool.html" title="struct tokio_threadpool::ThreadPool">ThreadPool</a></code><a href='#impl-Drop' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tokio_threadpool/thread_pool.rs.html#126-134' 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/tokio_threadpool/thread_pool.rs.html#127-133' 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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