ypes.</p>
<p >The allocator is <em>stateless</em>. It takes no space within any container that uses it; and it is always default-cted by the container code itself &ndash; never by the user. That is the reason <a class="el" href="classipc_1_1shm_1_1stl_1_1Arena__activator.html" title="RAII-style class operating a stack-like notion of a the given thread&#39;s currently active SHM-aware Are...">Arena_activator</a> is necessary (when allocating/deallocating).</p>
<h3><code>Arena</code> type requirements (for fu