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| <a name="boost.interprocess.interprocess_condition"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Class interprocess_condition</span></h2> |
| <p>boost::interprocess::interprocess_condition</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="../../boost_interprocess_reference.html#header.boost.interprocess.sync.interprocess_condition_hpp" title="Header <boost/interprocess/sync/interprocess_condition.hpp>">boost/interprocess/sync/interprocess_condition.hpp</a>> |
| |
| </span> |
| <span class="keyword">class</span> <a class="link" href="interprocess_condition.html" title="Class interprocess_condition">interprocess_condition</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// <a class="link" href="interprocess_condition.html#boost.interprocess.interprocess_conditionconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="interprocess_condition.html#id920201-bb"><span class="identifier">interprocess_condition</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="interprocess_condition.html#id920220-bb"><span class="special">~</span><span class="identifier">interprocess_condition</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="interprocess_condition.html#id920022-bb">public member functions</a></span> |
| <span class="keyword">void</span> <a class="link" href="interprocess_condition.html#id920025-bb"><span class="identifier">notify_one</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">void</span> <a class="link" href="interprocess_condition.html#id920038-bb"><span class="identifier">notify_all</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">></span> <span class="keyword">void</span> <a class="link" href="interprocess_condition.html#id920051-bb"><span class="identifier">wait</span></a><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">,</span> <span class="keyword">typename</span> Pr<span class="special">></span> <span class="keyword">void</span> <a class="link" href="interprocess_condition.html#id920085-bb"><span class="identifier">wait</span></a><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Pr</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">></span> <span class="keyword">bool</span> <a class="link" href="interprocess_condition.html#id920119-bb"><span class="identifier">timed_wait</span></a><span class="special">(</span><span class="identifier">L</span> <span class="special">&</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><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">,</span> <span class="keyword">typename</span> Pr<span class="special">></span> |
| <span class="keyword">bool</span> <a class="link" href="interprocess_condition.html#id920160-bb"><span class="identifier">timed_wait</span></a><span class="special">(</span><span class="identifier">L</span> <span class="special">&</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><span class="special">,</span> <span class="identifier">Pr</span><span class="special">)</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id1641598"></a><h2>Description</h2> |
| <p>This class is a condition variable that can be placed in shared memory or memory mapped files. </p> |
| <div class="refsect2"> |
| <a name="id1641606"></a><h3> |
| <a name="boost.interprocess.interprocess_conditionconstruct-copy-destruct"></a><code class="computeroutput">interprocess_condition</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id920201-bb"></a><span class="identifier">interprocess_condition</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput"><a class="link" href="interprocess_condition.html" title="Class interprocess_condition">interprocess_condition</a></code>. On error throws <code class="computeroutput"><a class="link" href="interprocess_exception.html" title="Class interprocess_exception">interprocess_exception</a></code>. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id920220-bb"></a><span class="special">~</span><span class="identifier">interprocess_condition</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Destroys *this liberating system resources. </p> |
| </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id1641718"></a><h3> |
| <a name="id920022-bb"></a><code class="computeroutput">interprocess_condition</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="id920025-bb"></a><span class="identifier">notify_one</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>If there is a thread waiting on *this, change that thread's state to ready. Otherwise there is no effect. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id920038-bb"></a><span class="identifier">notify_all</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Change the state of all threads waiting on *this to ready. If there are no waiting threads, notify_all() has no effect. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">></span> <span class="keyword">void</span> <a name="id920051-bb"></a><span class="identifier">wait</span><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span> lock<span class="special">)</span><span class="special">;</span></pre> |
| <p>Releases the lock on the <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code> object associated with lock, blocks the current thread of execution until readied by a call to this->notify_one() or this->notify_all(), and then reacquires the lock. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">,</span> <span class="keyword">typename</span> Pr<span class="special">></span> <span class="keyword">void</span> <a name="id920085-bb"></a><span class="identifier">wait</span><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span> lock<span class="special">,</span> <span class="identifier">Pr</span> pred<span class="special">)</span><span class="special">;</span></pre> |
| <p>The same as: while (!pred()) wait(lock) </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">></span> |
| <span class="keyword">bool</span> <a name="id920119-bb"></a><span class="identifier">timed_wait</span><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span> lock<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>Releases the lock on the <code class="computeroutput"><a class="link" href="interprocess_mutex.html" title="Class interprocess_mutex">interprocess_mutex</a></code> object associated with lock, blocks the current thread of execution until readied by a call to this->notify_one() or this->notify_all(), or until time abs_time is reached, and then reacquires the lock. Returns: false if time abs_time is reached, otherwise true. </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> L<span class="special">,</span> <span class="keyword">typename</span> Pr<span class="special">></span> |
| <span class="keyword">bool</span> <a name="id920160-bb"></a><span class="identifier">timed_wait</span><span class="special">(</span><span class="identifier">L</span> <span class="special">&</span> lock<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="identifier">Pr</span> pred<span class="special">)</span><span class="special">;</span></pre> |
| <p>The same as: while (!pred()) { if (!timed_wait(lock, abs_time)) return pred(); } return true; </p> |
| </li> |
| </ol></div> |
| </div> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2005-2010 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>) |
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