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<li class="navelem"><a class="el" href="a00228.html">tbb</a></li><li class="navelem"><a class="el" href="a00101.html">queuing_rw_mutex</a></li><li class="navelem"><a class="el" href="a00132.html">scoped_lock</a></li> </ul>
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<div class="title">tbb::queuing_rw_mutex::scoped_lock Class Reference</div> </div>
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<p>The scoped locking pattern.
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<p><code>#include &lt;queuing_rw_mutex.h&gt;</code></p>
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Inheritance diagram for tbb::queuing_rw_mutex::scoped_lock:</div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a1ae3792726dcff8da1f2c5366fb2b754"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#a1ae3792726dcff8da1f2c5366fb2b754">scoped_lock</a> ()</td></tr>
<tr class="memdesc:a1ae3792726dcff8da1f2c5366fb2b754"><td class="mdescLeft">&#160;</td><td class="mdescRight">Construct lock that has not acquired a mutex. <a href="#a1ae3792726dcff8da1f2c5366fb2b754">More...</a><br/></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#af1b55ca1839c9c7c2cd779cd2dd9c474">scoped_lock</a> (<a class="el" href="a00101.html">queuing_rw_mutex</a> &amp;m, bool write=true)</td></tr>
<tr class="memdesc:af1b55ca1839c9c7c2cd779cd2dd9c474"><td class="mdescLeft">&#160;</td><td class="mdescRight">Acquire lock on given mutex. <br/></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#a6cb16cc55f884bbbd5a69430c47b288f">~scoped_lock</a> ()</td></tr>
<tr class="memdesc:a6cb16cc55f884bbbd5a69430c47b288f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Release lock (if lock is held). <br/></td></tr>
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void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#ab4bf2fb86d6a418f9ea36474eb8893f9">acquire</a> (<a class="el" href="a00101.html">queuing_rw_mutex</a> &amp;m, bool write=true)</td></tr>
<tr class="memdesc:ab4bf2fb86d6a418f9ea36474eb8893f9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Acquire lock on given mutex. <br/></td></tr>
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<tr class="memitem:a4843d40dddc37c1aa3444e27d35d2433"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4843d40dddc37c1aa3444e27d35d2433"></a>
bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#a4843d40dddc37c1aa3444e27d35d2433">try_acquire</a> (<a class="el" href="a00101.html">queuing_rw_mutex</a> &amp;m, bool write=true)</td></tr>
<tr class="memdesc:a4843d40dddc37c1aa3444e27d35d2433"><td class="mdescLeft">&#160;</td><td class="mdescRight">Acquire lock on given mutex if free (i.e. non-blocking) <br/></td></tr>
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void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#a50fb02b77f02a01c74754d163157ec77">release</a> ()</td></tr>
<tr class="memdesc:a50fb02b77f02a01c74754d163157ec77"><td class="mdescLeft">&#160;</td><td class="mdescRight">Release lock. <br/></td></tr>
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<tr class="memitem:ae0f28ecfbbc5f8b3024cd47048b72b5b"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#ae0f28ecfbbc5f8b3024cd47048b72b5b">upgrade_to_writer</a> ()</td></tr>
<tr class="memdesc:ae0f28ecfbbc5f8b3024cd47048b72b5b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Upgrade reader to become a writer. <a href="#ae0f28ecfbbc5f8b3024cd47048b72b5b">More...</a><br/></td></tr>
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bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00132.html#af0af63035147a3d8422f8c8d7b8d2629">downgrade_to_reader</a> ()</td></tr>
<tr class="memdesc:af0af63035147a3d8422f8c8d7b8d2629"><td class="mdescLeft">&#160;</td><td class="mdescRight">Downgrade writer to become a reader. <br/></td></tr>
<tr class="separator:af0af63035147a3d8422f8c8d7b8d2629"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>The scoped locking pattern. </p>
<p>It helps to avoid the common problem of forgetting to release lock. It also nicely provides the "node" for queuing locks. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<td class="memname">tbb::queuing_rw_mutex::scoped_lock::scoped_lock </td>
<td>(</td>
<td class="paramname">)</td><td></td>
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<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Construct lock that has not acquired a mutex. </p>
<p>Equivalent to zero-initialization of *this. </p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">bool tbb::queuing_rw_mutex::scoped_lock::upgrade_to_writer </td>
<td>(</td>
<td class="paramname">)</td><td></td>
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<p>Upgrade reader to become a writer. </p>
<p>Returns whether the upgrade happened without releasing and re-acquiring the lock </p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>queuing_rw_mutex.h</li>
</ul>
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<hr>
<p></p>
Copyright &copy; 2005-2016 Intel Corporation. All Rights Reserved.
<p></p>
Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are
registered trademarks or trademarks of Intel Corporation or its
subsidiaries in the United States and other countries.
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* Other names and brands may be claimed as the property of others.
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