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<title>Issue 2125: TimedMutex specification problem</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#NAD_Editorial">Pending NAD Editorial</a> status.</em></p>
<h3 id="2125"><a href="lwg-closed.html#2125">2125</a>. <code>TimedMutex</code> specification problem</h3>
<p><b>Section:</b> 32.6.4.3 <a href="https://wg21.link/thread.timedmutex.requirements">[thread.timedmutex.requirements]</a>, 32.6.4.3.2 <a href="https://wg21.link/thread.timedmutex.class">[thread.timedmutex.class]</a> <b>Status:</b> <a href="lwg-active.html#NAD_Editorial">Pending NAD Editorial</a>
 <b>Submitter:</b> Vicente J. Botet Escriba <b>Opened:</b> 2012-01-01 <b>Last modified:</b> 2016-01-28</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#thread.timedmutex.requirements">issues</a> in [thread.timedmutex.requirements].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#Pending NAD Editorial">Pending NAD Editorial</a> status.</p>
<p><b>Discussion:</b></p>

<p>
32.6.4.3.2 <a href="https://wg21.link/thread.timedmutex.class">[thread.timedmutex.class]</a> says:
</p>
<blockquote><p>
The class <code>timed_mutex</code> shall satisfy all of the <code>TimedMutex</code> requirements (32.6.4.3 <a href="https://wg21.link/thread.timedmutex.requirements">[thread.timedmutex.requirements]</a>). 
It shall be a standardlayout class (Clause 11 <a href="https://wg21.link/class">[class]</a>).
</p></blockquote>
<p>
Problem here is that 32.6.4.3 <a href="https://wg21.link/thread.timedmutex.requirements">[thread.timedmutex.requirements]</a> does not define a requirement set named &quot;<code>TimedMutex</code>&quot;,
it only refers to &quot;<i>timed mutex types</i>&quot;
</p>

<p><i>[See also issue <a href="lwg-closed.html#2126" title="Several specification problems in regard to mutex requirements (Status: Pending NAD Editorial)">2126</a><sup><a href="https://cplusplus.github.io/LWG/issue2126" title="Latest snapshot">(i)</a></sup>]</i></p>


<p><i>[2012, Portland: move to Tentatively NAD Editorial]</i></p>

<p>
We have timed mutex type, but it is labeled timed mutex requirements
</p>
<p>
We can make a suggestion, but will send to the editor as it seems purely editorial.
There is a typo, and we don't have the timed mutex but 32.6.4.3 <a href="https://wg21.link/thread.timedmutex.requirements">[thread.timedmutex.requirements]</a> already
says timed mutex type, and we need to reuse that term down in the class to fulfil the mutex requirement.
</p>
<p><i>[To Editor:]</i></p>

<p>
Replace this one with timed mutex type.
</p>



<p id="res-2125"><b>Proposed resolution:</b></p>





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