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Object.html
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Object.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>
Class: Concurrent::Synchronization::Object
— Concurrent Ruby
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<span class="title">Object</span>
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<div id="content"><h1>Class: Concurrent::Synchronization::Object
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName"><span class='object_link'>ObjectImplementation</span></span>
<ul class="fullTree">
<li>Object</li>
<li class="next">Concurrent::Synchronization::Object</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib/concurrent/synchronization/object.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<p>Abstract object providing final, volatile, ans CAS extensions to build other concurrent abstractions.</p>
<ul>
<li>final instance variables see <span class='object_link'><a href="#safe_initialization!-class_method" title="Concurrent::Synchronization::Object.safe_initialization! (method)">Object.safe_initialization!</a></span></li>
<li>volatile instance variables see <span class='object_link'><a href="#attr_volatile-class_method" title="Concurrent::Synchronization::Object.attr_volatile (method)">Object.attr_volatile</a></span></li>
<li>volatile instance variables see <span class='object_link'><a href="#attr_atomic-class_method" title="Concurrent::Synchronization::Object.attr_atomic (method)">Object.attr_atomic</a></span></li>
</ul>
</div>
</div>
<div class="tags">
</div><div id="subclasses">
<h2>Direct Known Subclasses</h2>
<p class="children"><span class='object_link'><a href="../Atom.html" title="Concurrent::Atom (class)">Atom</a></span>, <span class='object_link'><a href="../AtomicMarkableReference.html" title="Concurrent::AtomicMarkableReference (class)">AtomicMarkableReference</a></span>, <span class='object_link'><a href="../Cancellation.html" title="Concurrent::Cancellation (class)">Cancellation</a></span>, <span class='object_link'><a href="../Cancellation/Token.html" title="Concurrent::Cancellation::Token (class)">Cancellation::Token</a></span>, <span class='object_link'><a href="../Channel/Tick.html" title="Concurrent::Channel::Tick (class)">Channel::Tick</a></span>, <span class='object_link'><a href="../Edge/LockFreeLinkedSet/Node.html" title="Concurrent::Edge::LockFreeLinkedSet::Node (class)">Edge::LockFreeLinkedSet::Node</a></span>, <span class='object_link'><a href="../LazyRegister.html" title="Concurrent::LazyRegister (class)">LazyRegister</a></span>, <span class='object_link'><a href="../LockFreeQueue/Node.html" title="Concurrent::LockFreeQueue::Node (class)">LockFreeQueue::Node</a></span>, <span class='object_link'><a href="../LockFreeStack.html" title="Concurrent::LockFreeStack (class)">LockFreeStack</a></span>, <span class='object_link'><a href="../MVar.html" title="Concurrent::MVar (class)">MVar</a></span>, <span class='object_link'><a href="../Maybe.html" title="Concurrent::Maybe (class)">Maybe</a></span>, <span class='object_link'><a href="../ProcessingActor.html" title="Concurrent::ProcessingActor (class)">ProcessingActor</a></span>, <span class='object_link'><a href="../Promises/AbstractEventFuture.html" title="Concurrent::Promises::AbstractEventFuture (class)">Promises::AbstractEventFuture</a></span>, <span class='object_link'><a href="../Promises/Channel.html" title="Concurrent::Promises::Channel (class)">Promises::Channel</a></span>, <span class='object_link'><a href="../ReadWriteLock.html" title="Concurrent::ReadWriteLock (class)">ReadWriteLock</a></span>, <span class='object_link'><a href="../ReentrantReadWriteLock.html" title="Concurrent::ReentrantReadWriteLock (class)">ReentrantReadWriteLock</a></span>, <span class='object_link'><a href="../TVar.html" title="Concurrent::TVar (class)">TVar</a></span>, <span class='object_link'><a href="../Throttle.html" title="Concurrent::Throttle (class)">Throttle</a></span></p>
</div>
<h2>
Class Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#attr_atomic-class_method" title="attr_atomic (class method)">.<strong>attr_atomic</strong>(*names) ⇒ Array<Symbol> </a>
</span>
<span class="summary_desc"><div class='inline'><p>Creates methods for reading and writing to a instance variable with volatile (Java) semantic as <span class='object_link'><a href="#attr_volatile-class_method" title="Concurrent::Synchronization::Object.attr_volatile (method)">Object.attr_volatile</a></span> does.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#attr_volatile-class_method" title="attr_volatile (class method)">.<strong>attr_volatile</strong>(*names) ⇒ Array<Symbol> </a>
</span>
<span class="summary_desc"><div class='inline'><p>Creates methods for reading and writing (as <code>attr_accessor</code> does) to a instance variable with volatile (Java) semantic.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#ensure_safe_initialization_when_final_fields_are_present-class_method" title="ensure_safe_initialization_when_final_fields_are_present (class method)">.<strong>ensure_safe_initialization_when_final_fields_are_present</strong> ⇒ undocumented </a>
</span>
<span class="summary_desc"><div class='inline'><p>For testing purposes, quite slow.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#new-class_method" title="new (class method)">.<strong>new</strong>(*args, &block) ⇒ undocumented </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#safe_initialization!-class_method" title="safe_initialization! (class method)">.<strong>safe_initialization!</strong> ⇒ undocumented </a>
</span>
<span class="summary_desc"><div class='inline'><p>By calling this method on a class, it and all its children are marked to be constructed safely.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#safe_initialization%3F-class_method" title="safe_initialization? (class method)">.<strong>safe_initialization?</strong> ⇒ true, false </a>
</span>
<span class="summary_desc"><div class='inline'><p>If this class is safely initialized.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#volatile_cas_fields-class_method" title="volatile_cas_fields (class method)">.<strong>volatile_cas_fields</strong>(inherited = true) ⇒ Array<Symbol> </a>
</span>
<span class="summary_desc"><div class='inline'><p>Returns defined volatile with CAS fields on this class.</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="#initialize-instance_method" title="#initialize (instance method)">#<strong>initialize</strong> ⇒ Object </a>
</span>
<span class="note title constructor">constructor</span>
<span class="summary_desc"><div class='inline'><p>Has to be called by children.</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> ⇒ <tt><span class='object_link'><a href="" title="Concurrent::Synchronization::Object (class)">Object</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Has to be called by children.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
36
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39</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 36</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span>
<span class='kw'>super</span>
<span class='id identifier rubyid_initialize_volatile_with_cas'>initialize_volatile_with_cas</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="class_method_details" class="method_details_list">
<h2>Class Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="attr_atomic-class_method">
.<strong>attr_atomic</strong>(*names) ⇒ <tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Creates methods for reading and writing to a instance variable with
volatile (Java) semantic as <span class='object_link'><a href="#attr_volatile-class_method" title="Concurrent::Synchronization::Object.attr_volatile (method)">attr_volatile</a></span> does.
The instance variable should be accessed oly through generated methods.
This method generates following methods: <code>value</code>, <code>value=(new_value) #=> new_value</code>,
<code>swap_value(new_value) #=> old_value</code>,
<code>compare_and_set_value(expected, value) #=> true || false</code>, <code>update_value(&block)</code>.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>names</span>
<span class='type'>(<tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>)</span>
—
<div class='inline'><p>of the instance variables to be volatile with CAS.</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>)</span>
—
<div class='inline'><p>names of defined method names.</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 94</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_attr_atomic'>attr_atomic</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_names'>names</span><span class='rparen'>)</span>
<span class='ivar'>@volatile_cas_fields</span> <span class='op'>||=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='ivar'>@volatile_cas_fields</span> <span class='op'>+=</span> <span class='id identifier rubyid_names'>names</span>
<span class='id identifier rubyid_safe_initialization!'>safe_initialization!</span>
<span class='id identifier rubyid_define_initialize_volatile_with_cas'>define_initialize_volatile_with_cas</span>
<span class='id identifier rubyid_names'>names</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_name'>name</span><span class='op'>|</span>
<span class='id identifier rubyid_ivar'>ivar</span> <span class='op'>=</span> <span class='symbol'>:"@Atomic</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='period'>.</span><span class='id identifier rubyid_to_s'>to_s</span><span class='period'>.</span><span class='id identifier rubyid_gsub'>gsub</span><span class='lparen'>(</span><span class='tstring'><span class='regexp_beg'>/</span><span class='tstring_content'>(?:^|_)(.)</span><span class='regexp_end'>/</span></span><span class='rparen'>)</span> <span class='lbrace'>{</span> <span class='backref'>$1</span><span class='period'>.</span><span class='id identifier rubyid_upcase'>upcase</span> <span class='rbrace'>}</span><span class='embexpr_end'>}</span><span class='tstring_end'>"</span></span>
<span class='id identifier rubyid_class_eval'>class_eval</span> <span class='heredoc_beg'><<-RUBY</span><span class='comma'>,</span> <span class='kw'>__FILE__</span><span class='comma'>,</span> <span class='kw'>__LINE__</span> <span class='op'>+</span> <span class='int'>1</span>
<span class='tstring_content'> def </span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='embexpr_end'>}</span><span class='tstring_content'>
</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_ivar'>ivar</span><span class='embexpr_end'>}</span><span class='tstring_content'>.get
end
def </span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='embexpr_end'>}</span><span class='tstring_content'>=(value)
</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_ivar'>ivar</span><span class='embexpr_end'>}</span><span class='tstring_content'>.set value
end
def swap_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='embexpr_end'>}</span><span class='tstring_content'>(value)
</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_ivar'>ivar</span><span class='embexpr_end'>}</span><span class='tstring_content'>.swap value
end
def compare_and_set_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='embexpr_end'>}</span><span class='tstring_content'>(expected, value)
</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_ivar'>ivar</span><span class='embexpr_end'>}</span><span class='tstring_content'>.compare_and_set expected, value
end
def update_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_name'>name</span><span class='embexpr_end'>}</span><span class='tstring_content'>(&block)
</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_ivar'>ivar</span><span class='embexpr_end'>}</span><span class='tstring_content'>.update(&block)
end
</span><span class='heredoc_end'> RUBY
</span> <span class='kw'>end</span>
<span class='id identifier rubyid_names'>names</span><span class='period'>.</span><span class='id identifier rubyid_flat_map'>flat_map</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_n'>n</span><span class='op'>|</span> <span class='lbracket'>[</span><span class='id identifier rubyid_n'>n</span><span class='comma'>,</span> <span class='symbol'>:"#{</span><span class='id identifier rubyid_n'>n</span><span class='embexpr_end'>}</span><span class='tstring_content'>=</span><span class='tstring_end'>"</span></span><span class='comma'>,</span> <span class='symbol'>:"swap_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_n'>n</span><span class='embexpr_end'>}</span><span class='tstring_end'>"</span></span><span class='comma'>,</span> <span class='symbol'>:"compare_and_set_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_n'>n</span><span class='embexpr_end'>}</span><span class='tstring_end'>"</span></span><span class='comma'>,</span> <span class='symbol'>:"update_</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_n'>n</span><span class='embexpr_end'>}</span><span class='tstring_end'>"</span></span><span class='rbracket'>]</span> <span class='rbrace'>}</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="attr_volatile-class_method">
.<strong>attr_volatile</strong>(*names) ⇒ <tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Creates methods for reading and writing (as <code>attr_accessor</code> does) to a instance variable with
volatile (Java) semantic. The instance variable should be accessed oly through generated methods.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>names</span>
<span class='type'>(<tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>)</span>
—
<div class='inline'><p>of the instance variables to be volatile</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>)</span>
—
<div class='inline'><p>names of defined method names</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
</pre>
</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 28</span>
</pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="ensure_safe_initialization_when_final_fields_are_present-class_method">
.<strong>ensure_safe_initialization_when_final_fields_are_present</strong> ⇒ <tt>undocumented</tt>
</h3><div class="docstring">
<div class="discussion">
<p>For testing purposes, quite slow. Injects assert code to new method which will raise if class instance contains
any instance variables with CamelCase names and isn't <span class='object_link'><a href="#safe_initialization%3F-class_method" title="Concurrent::Synchronization::Object.safe_initialization? (method)">safe_initialization?</a></span>.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
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<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 73</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_ensure_safe_initialization_when_final_fields_are_present'>ensure_safe_initialization_when_final_fields_are_present</span>
<span class='const'><span class='object_link'><a href="" title="Concurrent::Synchronization::Object (class)">Object</a></span></span><span class='period'>.</span><span class='id identifier rubyid_class_eval'>class_eval</span> <span class='kw'>do</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='id identifier rubyid_object'>object</span> <span class='op'>=</span> <span class='kw'>super</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>ensure</span>
<span class='id identifier rubyid_has_final_field'>has_final_field</span> <span class='op'>=</span> <span class='id identifier rubyid_object'>object</span><span class='period'>.</span><span class='id identifier rubyid_instance_variables'>instance_variables</span><span class='period'>.</span><span class='id identifier rubyid_any?'>any?</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_v'>v</span><span class='op'>|</span> <span class='id identifier rubyid_v'>v</span><span class='period'>.</span><span class='id identifier rubyid_to_s'>to_s</span> <span class='op'>=~</span> <span class='tstring'><span class='regexp_beg'>/</span><span class='tstring_content'>^@[A-Z]</span><span class='regexp_end'>/</span></span> <span class='rbrace'>}</span>
<span class='kw'>if</span> <span class='id identifier rubyid_has_final_field'>has_final_field</span> <span class='op'>&&</span> <span class='op'>!</span><span class='id identifier rubyid_safe_initialization?'>safe_initialization?</span>
<span class='id identifier rubyid_raise'>raise</span> <span class='tstring'><span class='tstring_beg'>"</span><span class='tstring_content'>there was an instance of </span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_object'>object</span><span class='period'>.</span><span class='id identifier rubyid_class'>class</span><span class='embexpr_end'>}</span><span class='tstring_content'> with final field but not marked with safe_initialization!</span><span class='tstring_end'>"</span></span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="new-class_method">
.<strong>new</strong>(*args, &block) ⇒ <tt>undocumented</tt>
</h3><table class="source_code">
<tr>
<td>
<pre class="lines">
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<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 56</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='id identifier rubyid_object'>object</span> <span class='op'>=</span> <span class='kw'>super</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>ensure</span>
<span class='id identifier rubyid_object'>object</span><span class='period'>.</span><span class='id identifier rubyid_full_memory_barrier'>full_memory_barrier</span> <span class='kw'>if</span> <span class='id identifier rubyid_object'>object</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="safe_initialization!-class_method">
.<strong>safe_initialization!</strong> ⇒ <tt>undocumented</tt>
</h3><div class="docstring">
<div class="discussion">
<p>By calling this method on a class, it and all its children are marked to be constructed safely. Meaning that
all writes (ivar initializations) are made visible to all readers of newly constructed object. It ensures
same behaviour as Java's final fields.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<p class="tag_title">Examples:</p>
<pre class="example code"><code><span class='kw'>class</span> <span class='const'>AClass</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="../Synchronization.html" title="Concurrent::Synchronization (module)">Synchronization</a></span></span><span class='op'>::</span><span class='const'><span class='object_link'><a href="" title="Concurrent::Synchronization::Object (class)">Object</a></span></span>
<span class='id identifier rubyid_safe_initialization!'>safe_initialization!</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span>
<span class='ivar'>@AFinalValue</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>'</span><span class='tstring_content'>value</span><span class='tstring_end'>'</span></span> <span class='comment'># published safely, does not have to be synchronized
</span> <span class='kw'>end</span>
<span class='kw'>end</span></code></pre>
</div>
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<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 52</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_safe_initialization!'>safe_initialization!</span>
<span class='comment'># define only once, and not again in children
</span> <span class='kw'>return</span> <span class='kw'>if</span> <span class='id identifier rubyid_safe_initialization?'>safe_initialization?</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='id identifier rubyid_object'>object</span> <span class='op'>=</span> <span class='kw'>super</span><span class='lparen'>(</span><span class='op'>*</span><span class='id identifier rubyid_args'>args</span><span class='comma'>,</span> <span class='op'>&</span><span class='id identifier rubyid_block'>block</span><span class='rparen'>)</span>
<span class='kw'>ensure</span>
<span class='id identifier rubyid_object'>object</span><span class='period'>.</span><span class='id identifier rubyid_full_memory_barrier'>full_memory_barrier</span> <span class='kw'>if</span> <span class='id identifier rubyid_object'>object</span>
<span class='kw'>end</span>
<span class='ivar'>@safe_initialization</span> <span class='op'>=</span> <span class='kw'>true</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="safe_initialization?-class_method">
.<strong>safe_initialization?</strong> ⇒ <tt>true</tt>, <tt>false</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns if this class is safely initialized.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
—
<div class='inline'><p>if this class is safely initialized.</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 66</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_safe_initialization?'>safe_initialization?</span>
<span class='ivar'>@safe_initialization</span> <span class='op'>=</span> <span class='kw'>false</span> <span class='kw'>unless</span> <span class='kw'>defined?</span> <span class='ivar'>@safe_initialization</span>
<span class='ivar'>@safe_initialization</span> <span class='op'>||</span> <span class='lparen'>(</span><span class='id identifier rubyid_superclass'>superclass</span><span class='period'>.</span><span class='id identifier rubyid_respond_to?'>respond_to?</span><span class='lparen'>(</span><span class='symbol'>:safe_initialization?</span><span class='rparen'>)</span> <span class='op'>&&</span> <span class='id identifier rubyid_superclass'>superclass</span><span class='period'>.</span><span class='id identifier rubyid_safe_initialization?'>safe_initialization?</span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="volatile_cas_fields-class_method">
.<strong>volatile_cas_fields</strong>(inherited = true) ⇒ <tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns defined volatile with CAS fields on this class.</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>inherited</span>
<span class='type'>(<tt>true</tt>, <tt>false</tt>)</span>
<em class="default">(defaults to: <tt>true</tt>)</em>
—
<div class='inline'><p>should inherited volatile with CAS fields be returned?</p>
</div>
</li>
</ul>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt><span class='object_link'><a href="../Array.html" title="Concurrent::Array (class)">Array</a></span><Symbol></tt>)</span>
—
<div class='inline'><p>Returns defined volatile with CAS fields on this class.</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/concurrent/synchronization/object.rb', line 129</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_volatile_cas_fields'>volatile_cas_fields</span><span class='lparen'>(</span><span class='id identifier rubyid_inherited'>inherited</span> <span class='op'>=</span> <span class='kw'>true</span><span class='rparen'>)</span>
<span class='ivar'>@volatile_cas_fields</span> <span class='op'>||=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='lparen'>(</span><span class='lparen'>(</span><span class='id identifier rubyid_superclass'>superclass</span><span class='period'>.</span><span class='id identifier rubyid_volatile_cas_fields'>volatile_cas_fields</span> <span class='kw'>if</span> <span class='id identifier rubyid_superclass'>superclass</span><span class='period'>.</span><span class='id identifier rubyid_respond_to?'>respond_to?</span><span class='lparen'>(</span><span class='symbol'>:volatile_cas_fields</span><span class='rparen'>)</span> <span class='op'>&&</span> <span class='id identifier rubyid_inherited'>inherited</span><span class='rparen'>)</span> <span class='op'>||</span> <span class='lbracket'>[</span><span class='rbracket'>]</span><span class='rparen'>)</span> <span class='op'>+</span>
<span class='ivar'>@volatile_cas_fields</span>
<span class='kw'>end</span></pre>
</td>
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