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Uttarayan Mondal
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<!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="A multi-producer, single-consumer queue for sending values across asynchronous tasks."><meta name="keywords" content="rust, rustlang, rust-lang, mpsc"><title>futures_channel::mpsc - 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><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 mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../futures_channel/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Module mpsc</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div><p class="location"><a href="../index.html">futures_channel</a></p><div id="sidebar-vars" data-name="mpsc" data-ty="mod" 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"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><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" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../index.html">futures_channel</a>::<wbr><a class="mod" href="">mpsc</a></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/futures_channel/mpsc/mod.rs.html#1-1356" title="goto source code">[src]</a></span></h1><div class="docblock"><p>A multi-producer, single-consumer queue for sending values across
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asynchronous tasks.</p>
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<p>Similarly to the <code>std</code>, channel creation provides <a href="struct.Receiver.html"><code>Receiver</code></a> and
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<a href="struct.Sender.html"><code>Sender</code></a> handles. <a href="struct.Receiver.html"><code>Receiver</code></a> implements <a href="../../futures_core/stream/trait.Stream.html"><code>Stream</code></a> and allows a task to
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read values out of the channel. If there is no message to read from the
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channel, the current task will be notified when a new value is sent.
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<a href="struct.Sender.html"><code>Sender</code></a> implements the <code>Sink</code> trait and allows a task to send messages into
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the channel. If the channel is at capacity, the send will be rejected and
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the task will be notified when additional capacity is available. In other
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words, the channel provides backpressure.</p>
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<p>Unbounded channels are also available using the <code>unbounded</code> constructor.</p>
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<h1 id="disconnection" class="section-header"><a href="#disconnection">Disconnection</a></h1>
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<p>When all <a href="struct.Sender.html"><code>Sender</code></a> handles have been dropped, it is no longer
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possible to send values into the channel. This is considered the termination
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event of the stream. As such, <a href="../../futures_core/stream/trait.Stream.html#tymethod.poll_next"><code>Receiver::poll_next</code></a>
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will return <code>Ok(Ready(None))</code>.</p>
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<p>If the <a href="struct.Receiver.html"><code>Receiver</code></a> handle is dropped, then messages can no longer
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be read out of the channel. In this case, all further attempts to send will
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result in an error.</p>
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<h1 id="clean-shutdown" class="section-header"><a href="#clean-shutdown">Clean Shutdown</a></h1>
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<p>If the <a href="struct.Receiver.html"><code>Receiver</code></a> is simply dropped, then it is possible for
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there to be messages still in the channel that will not be processed. As
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such, it is usually desirable to perform a “clean” shutdown. To do this, the
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receiver will first call <code>close</code>, which will prevent any further messages to
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be sent into the channel. Then, the receiver consumes the channel to
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completion, at which point the receiver can be dropped.</p>
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</div><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
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<table><tr class="module-item"><td><a class="struct" href="struct.Receiver.html" title="futures_channel::mpsc::Receiver struct">Receiver</a></td><td class="docblock-short"><p>The receiving end of a bounded mpsc channel.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.SendError.html" title="futures_channel::mpsc::SendError struct">SendError</a></td><td class="docblock-short"><p>The error type for <a href="../../futures_channel/mpsc/struct.Sender.html"><code>Sender</code>s</a> used as <code>Sink</code>s.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.Sender.html" title="futures_channel::mpsc::Sender struct">Sender</a></td><td class="docblock-short"><p>The transmission end of a bounded mpsc channel.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.TryRecvError.html" title="futures_channel::mpsc::TryRecvError struct">TryRecvError</a></td><td class="docblock-short"><p>The error type returned from <a href="../../futures_channel/mpsc/struct.Receiver.html#method.try_next"><code>try_next</code></a>.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.TrySendError.html" title="futures_channel::mpsc::TrySendError struct">TrySendError</a></td><td class="docblock-short"><p>The error type returned from <a href="../../futures_channel/mpsc/struct.Sender.html#method.try_send"><code>try_send</code></a>.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.UnboundedReceiver.html" title="futures_channel::mpsc::UnboundedReceiver struct">UnboundedReceiver</a></td><td class="docblock-short"><p>The receiving end of an unbounded mpsc channel.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.UnboundedSender.html" title="futures_channel::mpsc::UnboundedSender struct">UnboundedSender</a></td><td class="docblock-short"><p>The transmission end of an unbounded mpsc channel.</p>
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</td></tr></table><h2 id="functions" class="section-header"><a href="#functions">Functions</a></h2>
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<table><tr class="module-item"><td><a class="fn" href="fn.channel.html" title="futures_channel::mpsc::channel fn">channel</a></td><td class="docblock-short"><p>Creates a bounded mpsc channel for communicating between asynchronous tasks.</p>
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</td></tr><tr class="module-item"><td><a class="fn" href="fn.unbounded.html" title="futures_channel::mpsc::unbounded fn">unbounded</a></td><td class="docblock-short"><p>Creates an unbounded mpsc channel for communicating between asynchronous
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tasks.</p>
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</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="futures_channel"></div>
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