k-like notion of a the given thread&#39;s currently active SHM-aware Are...">Arena_activator</a>. For example:</p>
<div class="fragment"><div class="line"><span class="keyword">using </span>Shm_classic_arena = <a class="code hl_class" href="classipc_1_1shm_1_1classic_1_1Pool__arena.html">classic::Pool_arena</a>;</div>
<div class="line"><span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><span class="keyword">using </span>Shm_classic_allocator = <a cla