lass="keyword">struct</span> <a class="link" href="thread_a_idm46093042296400.html" title="Struct template thread_access_mode_of&lt;upgrade_lock&lt; MutexT &gt;&gt;">thread_access_mode_of</a><span class="special">&lt;</span><span class="identifier">upgrade_lock</span><span class="special">&lt;</span> <span class="identifier">MutexT</span> <span class="special">&gt;</span><span class="special">&gt;</span> <span class="special">:</span>
  <span class="keyword">public</span> <span class="identifier">mpl</span>