html" title="Identical to session::Server_session in every way, except that it makes available two SHM arenas,...">shm::classic::Server_session</a> is to vanilla <a class="el" href="namespaceipc_1_1session.html#ab01d5bce0ab2f3435ca9dd88d27609dc" title="A vanilla Server_session with no optional capabilities.">Server_session</a>: it is the session-server type that starts SHM-enabled sessions with SHM-classic provider (<a class="el" href="classipc_1_1shm_1_1classic_1_1Pool__arena.html" title="A SHM-classic int