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<title>Class impl</title>
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<div class="refentry">
<a name="boost.log.attributes.current_thread_id.impl"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Class impl</span></h2>
<p>boost::log::attributes::current_thread_id::impl — Factory implementation. </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../../attributes.html#header.boost.log.attributes.current_thread_id_hpp" title="Header <boost/log/attributes/current_thread_id.hpp>">boost/log/attributes/current_thread_id.hpp</a>>
</span>
<span class="comment">// Factory implementation.</span>
<span class="keyword">class</span> <a class="link" href="impl.html" title="Class impl">impl</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">attribute_value</span><span class="special">::</span><span class="identifier">impl</span> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="impl.html#idp35334784-bb">public member functions</a></span>
<span class="keyword">virtual</span> <span class="keyword">bool</span> <a class="link" href="impl.html#idp35335344-bb"><span class="identifier">dispatch</span></a><span class="special">(</span><span class="identifier">type_dispatcher</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">virtual</span> <span class="identifier">intrusive_ptr</span><span class="special"><</span> <a class="link" href="../../attribute_value/impl.html" title="Struct impl">attribute_value::impl</a> <span class="special">></span> <a class="link" href="impl.html#idp35339264-bb"><span class="identifier">detach_from_thread</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">virtual</span> <span class="identifier">type_info_wrapper</span> <a class="link" href="impl.html#idp35342352-bb"><span class="identifier">get_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp89987136"></a><h2>Description</h2>
<div class="refsect2">
<a name="idp89987552"></a><h3>
<a name="idp35334784-bb"></a><code class="computeroutput">impl</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">bool</span> <a name="idp35335344-bb"></a><span class="identifier">dispatch</span><span class="special">(</span><span class="identifier">type_dispatcher</span> <span class="special">&</span> dispatcher<span class="special">)</span><span class="special">;</span></pre>
<p>The method dispatches the value to the given object.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">dispatcher</code></span></p></td>
<td><p>The object that attempts to dispatch the stored value. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>true if <span class="emphasis"><em>dispatcher</em></span> was capable to consume the real attribute value type and false otherwise. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">virtual</span> <span class="identifier">intrusive_ptr</span><span class="special"><</span> <a class="link" href="../../attribute_value/impl.html" title="Struct impl">attribute_value::impl</a> <span class="special">></span> <a name="idp35339264-bb"></a><span class="identifier">detach_from_thread</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>The method is called when the attribute value is passed to another thread (e.g. in case of asynchronous logging). The value should ensure it properly owns all thread-specific data.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
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<td><p><span class="term">Returns:</span></p></td>
<td><p>An actual pointer to the attribute value. It may either point to this object or another. In the latter case the returned pointer replaces the pointer used by caller to invoke this method and is considered to be a functional equivalent to the previous pointer. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">virtual</span> <span class="identifier">type_info_wrapper</span> <a name="idp35342352-bb"></a><span class="identifier">get_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>The attribute value type </p></td>
</tr></tbody>
</table></div>
</li>
</ol></div>
</div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2007-2014 Andrey Semashev<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>).
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