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Class: Concurrent::Set
— Concurrent Ruby
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<span class="title">Set</span>
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<div id="content"><h1>Class: Concurrent::Set
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<dt>Inherits:</dt>
<dd>
<span class="inheritName"><span class='object_link'>SetImplementation</span></span>
<ul class="fullTree">
<li>Object</li>
<li class="next">Concurrent::Set</li>
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<dt>Defined in:</dt>
<dd>lib/concurrent-ruby/concurrent/set.rb</dd>
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<h2>Overview</h2><div class="docstring">
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<strong>Note:</strong>
<div class='inline'><p><code>a += b</code> is <strong>not</strong> a <strong>thread-safe</strong> operation on
<code>Concurrent::Set</code>. It reads Set <code>a</code>, then it creates new <code>Concurrent::Set</code>
which is union of <code>a</code> and <code>b</code>, then it writes the union to <code>a</code>.
The read and write are independent operations they do not form a single atomic
operation therefore when two <code>+=</code> operations are executed concurrently updates
may be lost. Use <code>#merge</code> instead.</p>
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<p>A thread-safe subclass of Set. This version locks against the object
itself for every method call, ensuring only one thread can be reading
or writing at a time. This includes iteration methods like <code>#each</code>.</p>
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<p class="tag_title">See Also:</p>
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<li><a href="http://ruby-doc.org/stdlib-2.4.0/libdoc/set/rdoc/Set.html" target="_parent" title="Ruby standard library `Set`">Ruby standard library `Set`</a></li>
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