139 lines
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139 lines
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<title>futures::unsync::mpsc::spawn - Rust</title>
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<p class='location'><a href='../../index.html'>futures</a>::<wbr><a href='../index.html'>unsync</a>::<wbr><a href='index.html'>mpsc</a></p><script>window.sidebarCurrent = {name: 'spawn', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>futures</a>::<wbr><a href='../index.html'>unsync</a>::<wbr><a href='index.html'>mpsc</a>::<wbr><a class="fn" href=''>spawn</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../../../src/futures/unsync/mpsc.rs.html#379-393' title='goto source code'>[src]</a></span></h1>
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<pre class='rust fn'>pub fn spawn<S, E>(<br> stream: S, <br> executor: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>E, <br> buffer: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br>) -> <a class="struct" href="../../../futures/unsync/mpsc/struct.SpawnHandle.html" title="struct futures::unsync::mpsc::SpawnHandle">SpawnHandle</a><S::<a class="type" href="../../../futures/stream/trait.Stream.html#associatedtype.Item" title="type futures::stream::Stream::Item">Item</a>, S::<a class="type" href="../../../futures/stream/trait.Stream.html#associatedtype.Error" title="type futures::stream::Stream::Error">Error</a>> <span class="where fmt-newline">where<br> S: <a class="trait" href="../../../futures/stream/trait.Stream.html" title="trait futures::stream::Stream">Stream</a>,<br> E: <a class="trait" href="../../../futures/future/trait.Executor.html" title="trait futures::future::Executor">Executor</a><<a class="struct" href="../../../futures/unsync/mpsc/struct.Execute.html" title="struct futures::unsync::mpsc::Execute">Execute</a><S>>, </span></pre><div class='docblock'><p>Spawns a <code>stream</code> onto the instance of <code>Executor</code> provided, <code>executor</code>,
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returning a handle representing the remote stream.</p>
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<p>The <code>stream</code> will be canceled if the <code>SpawnHandle</code> is dropped.</p>
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<p>The <code>SpawnHandle</code> returned is a stream that is a proxy for <code>stream</code> itself.
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When <code>stream</code> has additional items available, then the <code>SpawnHandle</code>
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will have those same items available.</p>
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<p>At most <code>buffer + 1</code> elements will be buffered at a time. If the buffer
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is full, then <code>stream</code> will stop progressing until more space is available.
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This allows the <code>SpawnHandle</code> to exert backpressure on the <code>stream</code>.</p>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>This function will panic if <code>executor</code> is unable spawn a <code>Future</code> containing
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the entirety of the <code>stream</code>.</p>
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