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<p class='location'><a href='../../index.html'>crossbeam</a>::<wbr><a href='../index.html'>sync</a></p><script>window.sidebarCurrent = {name: 'chase_lev', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script>
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<section id='main' class="content mod">
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<h1 class='fqn'><span class='in-band'>Module <a href='../../index.html'>crossbeam</a>::<wbr><a href='../index.html'>sync</a>::<wbr><a class='mod' href=''>chase_lev</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 id='src-688' class='srclink' href='../../../src/crossbeam/sync/chase_lev.rs.html#11-592' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>A lock-free concurrent work-stealing deque</p>
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<p>This module contains a hybrid implementation of the Chase-Lev work stealing deque
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described in <a href="http://neteril.org/%7Ejeremie/Dynamic_Circular_Work_Queue.pdf">"Dynamic Circular Work-Stealing Deque"</a> and the improved version
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described in <a href="http://www.di.ens.fr/%7Ezappa/readings/ppopp13.pdf">"Correct and Efficient Work-Stealing for Weak Memory Models"</a>.
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The implementation is heavily based on the pseudocode found in the papers.</p>
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<h1 id='example' class='section-header'><a href='#example'>Example</a></h1>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>crossbeam</span>::<span class='ident'>sync</span>::<span class='ident'>chase_lev</span>;
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<span class='kw'>let</span> (<span class='kw-2'>mut</span> <span class='ident'>worker</span>, <span class='ident'>stealer</span>) <span class='op'>=</span> <span class='ident'>chase_lev</span>::<span class='ident'>deque</span>();
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<span class='comment'>// Only the worker may push/try_pop</span>
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<span class='ident'>worker</span>.<span class='ident'>push</span>(<span class='number'>1</span>);
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<span class='ident'>worker</span>.<span class='ident'>try_pop</span>();
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<span class='comment'>// Stealers take data from the other end of the deque</span>
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<span class='ident'>worker</span>.<span class='ident'>push</span>(<span class='number'>1</span>);
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<span class='ident'>stealer</span>.<span class='ident'>steal</span>();
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<span class='comment'>// Stealers can be cloned to have many stealers stealing in parallel</span>
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<span class='ident'>worker</span>.<span class='ident'>push</span>(<span class='number'>1</span>);
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<span class='kw'>let</span> <span class='ident'>stealer2</span> <span class='op'>=</span> <span class='ident'>stealer</span>.<span class='ident'>clone</span>();
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<span class='ident'>stealer2</span>.<span class='ident'>steal</span>();</pre>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='struct' href='struct.Stealer.html'
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title='crossbeam::sync::chase_lev::Stealer'>Stealer</a></td>
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<td class='docblock short'>
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<p>The stealing half of the work-stealing deque. Stealers have access to the
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opposite end of the deque from the worker, and they only have access to the
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<code>steal</code> method.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class='struct' href='struct.Worker.html'
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title='crossbeam::sync::chase_lev::Worker'>Worker</a></td>
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<td class='docblock short'>
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<p>Worker half of the work-stealing deque. This worker has exclusive access to
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one side of the deque, and uses <code>push</code> and <code>try_pop</code> method to manipulate it.</p>
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</td>
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</tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
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<tr class=' module-item'>
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<td><a class='enum' href='enum.Steal.html'
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title='crossbeam::sync::chase_lev::Steal'>Steal</a></td>
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<td class='docblock short'>
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<p>When stealing some data, this is an enumeration of the possible outcomes.</p>
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</td>
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</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='fn' href='fn.deque.html'
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title='crossbeam::sync::chase_lev::deque'>deque</a></td>
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<td class='docblock short'>
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<p>Creates a new empty deque</p>
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