Type hb:			HBytes_Value @
Init hb				cht_hb_sentinel(&@);

Type hbv:			HBytes_Var @
Init hbv			@.hb=0; cht_init_somethingv(&@.sth);
Fini hbv			cht_fini_somethingv(ip, rc, &@.sth);

Type addrmapv:			AddrMap_Var @
Init addrmapv			@.am=0; cht_init_somethingv(&@.sth);
Fini addrmapv			cht_fini_somethingv(ip, rc, &@.sth);