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<title>counter_update_policy Interface
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<h1>
<tt>counter_update_policy
</tt>
Interface
</h1>
<p>A list-update policy that moves elements to the front of the list based on the counter algorithm.
</p>
<p>This class is likely to slightly change interface when random number generators become part of the C++ standard.
</p>
<ol>
<li>
<a href = "../../../../include/ext/pb_assoc/counter_update_policy.hpp"><tt>counter_update_policy.hpp</tt>
</a>
</li>
<li>
<a href = "#link1">Template parameters.
</a>
</li>
<li>
Public Types and Constants:
<ol>
<li>
<a href = "#link2">Size definitions.
</a>
</li>
</ol>
</li>
<li>
Public Methods:
<ol>
<li>
<a href = "#link3">Constructors, destructor, and related.
</a>
</li>
<li>
<a href = "#link4">Information methods.
</a>
</li>
</ol>
</li>
<li>
Protected Types and Constants:
<ol>
<li>
<a href = "#link5">Metadata definitions.
</a>
</li>
</ol>
</li>
<li>
Protected Methods:
<ol>
<li>
<a href = "#link6">Metadata operations.
</a>
</li>
</ol>
</li>
</ol>
<h2>
<a name = "link1">Template parameters.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "20%" ALIGN = "left"><b>Parameter</b></TD><TD Width = "50%" ALIGN = "left"><b>Description</b></TD><TD Width = "30%" ALIGN = "left"><b>Default Value</b></TD></TR>
<tr>
<td>
<pre><a name = "Size_Type3735929483">Size_Type</a></pre>
</td>
<td>
<p>Size type.</p>
</td>
<td>
size_t
</td>
</tr>
<tr>
<td>
<pre><a name = "Metadata_Reference3735929465">Metadata_Reference</a></pre>
</td>
<td>
<p>Metadata reference type.</p>
</td>
<td>
<pre>std::allocator<
<a href = "counter_update_metadata.html"><tt>counter_update_metadata</tt></a>>::
reference
</td>
</tr>
</table>
<h2>
<a name = "link2">Size definitions.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "30%" ALIGN = "left"><b>Type</b></TD><TD Width = "55%" ALIGN = "left"><b>Definition</b></TD><TD Width = "15%" ALIGN = "left"><b>Description</b></TD></TR>
<tr>
<td>
<pre><a name = "size_type3735929547">size_type</a></pre>
</td>
<td>
<pre><a href = "#Size_Type3735929483">Size_Type</a></pre>
</td>
<td>
<p>Size type used for counting the number of times each node is accessed until the count is reset to 0 and the node moved to the front of the list.</p>
</td>
</tr>
</table>
<h2>
<a name = "link3">Constructors, destructor, and related.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "45%" ALIGN = "left"><b>Method</b></TD><TD Width = "55%" ALIGN = "left"><b>Description</b></TD></TR>
<tr>
<td>
<pre> counter_update_policy
(<a href = "#size_type3735929547">size_type</a> max_count = 5)</pre>
</td>
<td>
<p>Constructor. <font color = "#666666"><tt>max_count</tt></font> determines the the number of times each node is accessed until the count is reset to 0 and the node moved to the front of the list.</p>
</td>
</tr>
<tr>
<td>
<pre><b>void</b>
swap
(<font color = "olive">counter_update_policy</font> &r_other)</pre>
</td>
<td>
<p>Swaps content.</p>
</td>
</tr>
</table>
<h2>
<a name = "link4">Information methods.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "45%" ALIGN = "left"><b>Method</b></TD><TD Width = "55%" ALIGN = "left"><b>Description</b></TD></TR>
<tr>
<td>
<pre><b>inline</b>
<a href = "#size_type3735929547">size_type</a>
get_max_count
() <b>const</b></pre>
</td>
<td>
<p>Returns the max count of each metadata (number of times it is accessed until moved to the front of the list).</p>
</td>
</tr>
</table>
<h2>
<a name = "link5">Metadata definitions.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "30%" ALIGN = "left"><b>Type</b></TD><TD Width = "55%" ALIGN = "left"><b>Definition</b></TD><TD Width = "15%" ALIGN = "left"><b>Description</b></TD></TR>
<tr>
<td>
<pre><a name = "metadata_type3735929937">metadata_type</a></pre>
</td>
<td>
<pre><a href = "counter_update_metadata.html"><tt>counter_update_metadata</tt></a></pre>
</td>
<td>
<p>Metadata on which this functor operates.</p>
</td>
</tr>
<tr>
<td>
<pre><a name = "metadata_reference3735929497">metadata_reference</a></pre>
</td>
<td>
<pre><a href = "#Metadata_Reference3735929465">Metadata_Reference</a></pre>
</td>
<td>
<p>Reference to metadata on which this functor operates.</p>
</td>
</tr>
</table>
<h2>
<a name = "link6">Metadata operations.
</a>
</h2>
<table WIDTH = "100%" BORDER = "1">
<TR><TD Width = "45%" ALIGN = "left"><b>Method</b></TD><TD Width = "55%" ALIGN = "left"><b>Description</b></TD></TR>
<tr>
<td>
<pre><a href = "#metadata_type3735929937">metadata_type</a>
<b>operator</b>()
() <b>const</b></pre>
</td>
<td>
<p>Creates a metadata object.</p>
</td>
</tr>
<tr>
<td>
<pre><b>bool</b>
<b>operator</b>()
(<a href = "#metadata_reference3735929497">metadata_reference</a> r_data) <b>const</b></pre>
</td>
<td>
<p>Decides whether a metadata object should be moved to the front of the list.</p>
</td>
</tr>
</table>
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