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Tuple.html
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Tuple.html
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<!DOCTYPE html>
<html>
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<title>
Class: Concurrent::Tuple
— Concurrent Ruby
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<span class="title">Tuple</span>
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<div id="content"><h1>Class: Concurrent::Tuple
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName">Object</span>
<ul class="fullTree">
<li>Object</li>
<li class="next">Concurrent::Tuple</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Includes:</dt>
<dd>Enumerable</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib/concurrent/tuple.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<p>A fixed size array with volatile (synchronized, thread safe) getters/setters.
Mixes in Ruby's <code>Enumerable</code> module for enhanced search, sort, and traversal.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<p class="tag_title">Examples:</p>
<pre class="example code"><code><span class='id identifier rubyid_tuple'>tuple</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../Concurrent.html" title="Concurrent (module)">Concurrent</a></span></span><span class='op'>::</span><span class='const'>Tuple</span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="#initialize-instance_method" title="Concurrent::Tuple#initialize (method)">new</a></span></span><span class='lparen'>(</span><span class='int'>16</span><span class='rparen'>)</span>
<span class='id identifier rubyid_tuple'>tuple</span><span class='period'>.</span><span class='id identifier rubyid_set'>set</span><span class='lparen'>(</span><span class='int'>0</span><span class='comma'>,</span> <span class='symbol'>:foo</span><span class='rparen'>)</span> <span class='comment'>#=> :foo | volatile write
</span><span class='id identifier rubyid_tuple'>tuple</span><span class='period'>.</span><span class='id identifier rubyid_get'>get</span><span class='lparen'>(</span><span class='int'>0</span><span class='rparen'>)</span> <span class='comment'>#=> :foo | volatile read
</span><span class='id identifier rubyid_tuple'>tuple</span><span class='period'>.</span><span class='id identifier rubyid_compare_and_set'>compare_and_set</span><span class='lparen'>(</span><span class='int'>0</span><span class='comma'>,</span> <span class='symbol'>:foo</span><span class='comma'>,</span> <span class='symbol'>:bar</span><span class='rparen'>)</span> <span class='comment'>#=> true | strong CAS
</span><span class='id identifier rubyid_tuple'>tuple</span><span class='period'>.</span><span class='id identifier rubyid_cas'>cas</span><span class='lparen'>(</span><span class='int'>0</span><span class='comma'>,</span> <span class='symbol'>:foo</span><span class='comma'>,</span> <span class='symbol'>:baz</span><span class='rparen'>)</span> <span class='comment'>#=> false | strong CAS
</span><span class='id identifier rubyid_tuple'>tuple</span><span class='period'>.</span><span class='id identifier rubyid_get'>get</span><span class='lparen'>(</span><span class='int'>0</span><span class='rparen'>)</span> <span class='comment'>#=> :bar | volatile read</span></code></pre>
</div>
<p class="tag_title">See Also:</p>
<ul class="see">
<li><a href="https://en.wikipedia.org/wiki/Tuple" target="_parent" title="Tuple entry at Wikipedia">Tuple entry at Wikipedia</a></li>
<li><a href="http://www.erlang.org/doc/reference_manual/data_types.html#id70396" target="_parent" title="Erlang Tuple">Erlang Tuple</a></li>
<li><a href="http://ruby-doc.org/core-2.2.2/Enumerable.html" target="_parent" title="Enumerable">Enumerable</a></li>
</ul>
</div>
<h2>Instance Attribute Summary <small><a href="#" class="summary_toggle">collapse</a></small></h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#size-instance_method" title="#size (instance method)">#<strong>size</strong> ⇒ undocumented </a>
</span>
<span class="note title readonly">readonly</span>
<span class="summary_desc"><div class='inline'><p>The (fixed) size of the tuple.</p>
</div></span>
</li>
</ul>
<h2>
Instance Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#compare_and_set-instance_method" title="#compare_and_set (instance method)">#<strong>compare_and_set</strong>(i, old_value, new_value) ⇒ Boolean </a>
(also: #cas)
</span>
<span class="summary_desc"><div class='inline'><p>Set the value at the given index to the new value if and only if the current value matches the given old value.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#each-instance_method" title="#each (instance method)">#<strong>each</strong> {|ref| ... } ⇒ undocumented </a>
</span>
<span class="summary_desc"><div class='inline'><p>Calls the given block once for each element in self, passing that element as a parameter.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#get-instance_method" title="#get (instance method)">#<strong>get</strong>(i) ⇒ Object </a>
(also: #volatile_get)
</span>
<span class="summary_desc"><div class='inline'><p>Get the value of the element at the given index.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#initialize-instance_method" title="#initialize (instance method)">#<strong>initialize</strong>(size) ⇒ Tuple </a>
</span>
<span class="note title constructor">constructor</span>
<span class="summary_desc"><div class='inline'><p>Create a new tuple of the given size.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#set-instance_method" title="#set (instance method)">#<strong>set</strong>(i, value) ⇒ Object </a>
(also: #volatile_set)
</span>
<span class="summary_desc"><div class='inline'><p>Set the element at the given index to the given value.</p>
</div></span>
</li>
</ul>
<div id="constructor_details" class="method_details_list">
<h2>Constructor Details</h2>
<div class="method_details first">
<h3 class="signature first" id="initialize-instance_method">
#<strong>initialize</strong>(size) ⇒ <tt><span class='object_link'>Tuple</span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Create a new tuple of the given size.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>size</span>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'><p>the number of elements in the tuple</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
33
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35
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41</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 33</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span><span class='lparen'>(</span><span class='id identifier rubyid_size'>size</span><span class='rparen'>)</span>
<span class='ivar'>@size</span> <span class='op'>=</span> <span class='id identifier rubyid_size'>size</span>
<span class='ivar'>@tuple</span> <span class='op'>=</span> <span class='id identifier rubyid_tuple'>tuple</span> <span class='op'>=</span> <span class='const'>Tuple</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='id identifier rubyid_size'>size</span><span class='rparen'>)</span>
<span class='id identifier rubyid_i'>i</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='kw'>while</span> <span class='id identifier rubyid_i'>i</span> <span class='op'><</span> <span class='id identifier rubyid_size'>size</span>
<span class='id identifier rubyid_tuple'>tuple</span><span class='lbracket'>[</span><span class='id identifier rubyid_i'>i</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../Concurrent.html" title="Concurrent (module)">Concurrent</a></span></span><span class='op'>::</span><span class='const'><span class='object_link'><a href="AtomicReference.html" title="Concurrent::AtomicReference (class)">AtomicReference</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="AtomicReference.html#initialize-instance_method" title="Concurrent::AtomicReference#initialize (method)">new</a></span></span>
<span class='id identifier rubyid_i'>i</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>end</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="instance_attr_details" class="attr_details">
<h2>Instance Attribute Details</h2>
<span id=""></span>
<div class="method_details first">
<h3 class="signature first" id="size-instance_method">
#<strong>size</strong> ⇒ <tt>undocumented</tt> <span class="extras">(readonly)</span>
</h3><div class="docstring">
<div class="discussion">
<p>The (fixed) size of the tuple.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
24
25
26</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 24</span>
<span class='kw'>def</span> <span class='id identifier rubyid_size'>size</span>
<span class='ivar'>@size</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="compare_and_set-instance_method">
#<strong>compare_and_set</strong>(i, old_value, new_value) ⇒ <tt>Boolean</tt>
<span class="aliases">Also known as:
<span class="names"><span id='cas-instance_method'>cas</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Set the value at the given index to the new value if and only if the current
value matches the given old value.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>i</span>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'><p>the index for the element to set</p>
</div>
</li>
<li>
<span class='name'>old_value</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the value to compare against the current value</p>
</div>
</li>
<li>
<span class='name'>new_value</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the value to set at the given index</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Boolean</tt>)</span>
—
<div class='inline'><p>true if the value at the given element was set else false</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
73
74
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76</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 73</span>
<span class='kw'>def</span> <span class='id identifier rubyid_compare_and_set'>compare_and_set</span><span class='lparen'>(</span><span class='id identifier rubyid_i'>i</span><span class='comma'>,</span> <span class='id identifier rubyid_old_value'>old_value</span><span class='comma'>,</span> <span class='id identifier rubyid_new_value'>new_value</span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>false</span> <span class='kw'>if</span> <span class='id identifier rubyid_i'>i</span> <span class='op'>>=</span> <span class='ivar'>@size</span> <span class='op'>||</span> <span class='id identifier rubyid_i'>i</span> <span class='op'><</span> <span class='int'>0</span>
<span class='ivar'>@tuple</span><span class='lbracket'>[</span><span class='id identifier rubyid_i'>i</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_compare_and_set'>compare_and_set</span><span class='lparen'>(</span><span class='id identifier rubyid_old_value'>old_value</span><span class='comma'>,</span> <span class='id identifier rubyid_new_value'>new_value</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="each-instance_method">
#<strong>each</strong> {|ref| ... } ⇒ <tt>undocumented</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Calls the given block once for each element in self, passing that element as a parameter.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Yield Parameters:</p>
<ul class="yieldparam">
<li>
<span class='name'>ref</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the <code>Concurrent::AtomicReference</code> object at the current index</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
82
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84</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 82</span>
<span class='kw'>def</span> <span class='id identifier rubyid_each'>each</span>
<span class='ivar'>@tuple</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='lbrace'>{</span><span class='op'>|</span><span class='id identifier rubyid_ref'>ref</span><span class='op'>|</span> <span class='kw'>yield</span> <span class='id identifier rubyid_ref'>ref</span><span class='period'>.</span><span class='id identifier rubyid_get'>get</span><span class='rbrace'>}</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="get-instance_method">
#<strong>get</strong>(i) ⇒ <tt>Object</tt>
<span class="aliases">Also known as:
<span class="names"><span id='volatile_get-instance_method'>volatile_get</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Get the value of the element at the given index.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>i</span>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'><p>the index from which to retrieve the value</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the value at the given index or nil if the index is out of bounds</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
47
48
49
50</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 47</span>
<span class='kw'>def</span> <span class='id identifier rubyid_get'>get</span><span class='lparen'>(</span><span class='id identifier rubyid_i'>i</span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>if</span> <span class='id identifier rubyid_i'>i</span> <span class='op'>>=</span> <span class='ivar'>@size</span> <span class='op'>||</span> <span class='id identifier rubyid_i'>i</span> <span class='op'><</span> <span class='int'>0</span>
<span class='ivar'>@tuple</span><span class='lbracket'>[</span><span class='id identifier rubyid_i'>i</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_get'>get</span>
<span class='kw'>end</span></pre>
</td>
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</table>
</div>
<div class="method_details ">
<h3 class="signature " id="set-instance_method">
#<strong>set</strong>(i, value) ⇒ <tt>Object</tt>
<span class="aliases">Also known as:
<span class="names"><span id='volatile_set-instance_method'>volatile_set</span></span>
</span>
</h3><div class="docstring">
<div class="discussion">
<p>Set the element at the given index to the given value</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>i</span>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'><p>the index for the element to set</p>
</div>
</li>
<li>
<span class='name'>value</span>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the value to set at the given index</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Object</tt>)</span>
—
<div class='inline'><p>the new value of the element at the given index or nil if the index is out of bounds</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
59
60
61
62</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/tuple.rb', line 59</span>
<span class='kw'>def</span> <span class='id identifier rubyid_set'>set</span><span class='lparen'>(</span><span class='id identifier rubyid_i'>i</span><span class='comma'>,</span> <span class='id identifier rubyid_value'>value</span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>if</span> <span class='id identifier rubyid_i'>i</span> <span class='op'>>=</span> <span class='ivar'>@size</span> <span class='op'>||</span> <span class='id identifier rubyid_i'>i</span> <span class='op'><</span> <span class='int'>0</span>
<span class='ivar'>@tuple</span><span class='lbracket'>[</span><span class='id identifier rubyid_i'>i</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_set'>set</span><span class='lparen'>(</span><span class='id identifier rubyid_value'>value</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
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