<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Class interprocess_recursive_mutex</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../../interprocess/indexes_reference.html#header.boost.interprocess.sync.interprocess_recursive_mutex_hpp" title="Header <boost/interprocess/sync/interprocess_recursive_mutex.hpp>"> <link rel="prev" href="interprocess_mutex.html" title="Class interprocess_mutex"> <link rel="next" href="interprocess_semaphore.html" title="Class interprocess_semaphore"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> <td align="center"><a href="../../../../index.html">Home</a></td> <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="interprocess_mutex.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../interprocess/indexes_reference.html#header.boost.interprocess.sync.interprocess_recursive_mutex_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="interprocess_semaphore.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="refentry"> <a name="boost.interprocess.interpro_idm45879390093552"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Class interprocess_recursive_mutex</span></h2> <p>boost::interprocess::interprocess_recursive_mutex</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="../../interprocess/indexes_reference.html#header.boost.interprocess.sync.interprocess_recursive_mutex_hpp" title="Header <boost/interprocess/sync/interprocess_recursive_mutex.hpp>">boost/interprocess/sync/interprocess_recursive_mutex.hpp</a>> </span> <span class="keyword">class</span> <a class="link" href="interpro_idm45879390093552.html" title="Class interprocess_recursive_mutex">interprocess_recursive_mutex</a> <span class="special">{</span> <span class="keyword">public</span><span class="special">:</span> <span class="comment">// <a class="link" href="interpro_idm45879390093552.html#boost.interprocess.interpro_idm45879390093552construct-copy-destruct">construct/copy/destruct</a></span> <a class="link" href="interpro_idm45879390093552.html#idm45879390078688-bb"><span class="identifier">interprocess_recursive_mutex</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <a class="link" href="interpro_idm45879390093552.html#idm45879390077232-bb"><span class="special">~</span><span class="identifier">interprocess_recursive_mutex</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="comment">// <a class="link" href="interpro_idm45879390093552.html#idm45879390091856-bb">public member functions</a></span> <span class="keyword">void</span> <a class="link" href="interpro_idm45879390093552.html#idm45879390091296-bb"><span class="identifier">lock</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="keyword">bool</span> <a class="link" href="interpro_idm45879390093552.html#idm45879390088976-bb"><span class="identifier">try_lock</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="keyword">bool</span> <a class="link" href="interpro_idm45879390093552.html#idm45879390085360-bb"><span class="identifier">timed_lock</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">ptime</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> <span class="keyword">void</span> <a class="link" href="interpro_idm45879390093552.html#idm45879390081040-bb"><span class="identifier">unlock</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="special">}</span><span class="special">;</span></pre></div> <div class="refsect1"> <a name="idm45555311612688"></a><h2>Description</h2> <p>Wraps a <a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a> that can be placed in shared memory and can be shared between processes. Allows several locking calls by the same process. Allows timed lock tries </p> <div class="refsect2"> <a name="idm45555311611264"></a><h3> <a name="boost.interprocess.interpro_idm45879390093552construct-copy-destruct"></a><code class="computeroutput">interprocess_recursive_mutex</code> public construct/copy/destruct</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout"><a name="idm45879390078688-bb"></a><span class="identifier">interprocess_recursive_mutex</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Constructor. Throws <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code> on error. </p> </li> <li class="listitem"> <pre class="literallayout"><a name="idm45879390077232-bb"></a><span class="special">~</span><span class="identifier">interprocess_recursive_mutex</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Destructor. If any process uses the mutex after the destructor is called the result is undefined. Does not throw. </p> </li> </ol></div> </div> <div class="refsect2"> <a name="idm45555311600688"></a><h3> <a name="idm45879390091856-bb"></a><code class="computeroutput">interprocess_recursive_mutex</code> public member functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout"><span class="keyword">void</span> <a name="idm45879390091296-bb"></a><span class="identifier">lock</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Effects: The calling thread tries to obtain ownership of the mutex, and if another thread has ownership of the mutex, it waits until it can obtain the ownership. If a thread takes ownership of the mutex the mutex must be unlocked by the same mutex. The mutex must be unlocked the same number of times it is locked. Throws: <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code> on error. </p> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">bool</span> <a name="idm45879390088976-bb"></a><span class="identifier">try_lock</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Tries to lock the <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code>, returns false when <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code> is already locked, returns true when success. The mutex must be unlocked the same number of times it is locked. Throws: <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code> if a severe error is found </p> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">bool</span> <a name="idm45879390085360-bb"></a><span class="identifier">timed_lock</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">ptime</span> <span class="special">&</span> abs_time<span class="special">)</span><span class="special">;</span></pre> <p>Tries to lock the <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code>, if <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code> can't be locked before abs_time time, returns false. The mutex must be unlocked the same number of times it is locked. Throws: <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code> if a severe error is found </p> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">void</span> <a name="idm45879390081040-bb"></a><span class="identifier">unlock</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Effects: The calling thread releases the exclusive ownership of the mutex. If the mutex supports recursive locking, the mutex must be unlocked the same number of times it is locked. Throws: <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code> on error. </p> </li> </ol></div> </div> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2005-2015 Ion Gaztanaga<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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="interprocess_mutex.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../interprocess/indexes_reference.html#header.boost.interprocess.sync.interprocess_recursive_mutex_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="interprocess_semaphore.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>