Add callback to backing queue

lukebakken · lukebakken · commit 55812c7b7dd0 · 2017-10-12T05:54:23.000-07:00
Fixes rabbitmq/rabbitmq-server#1388
diff --git a/src/rabbit_backing_queue.erl b/src/rabbit_backing_queue.erl
@@ -265,4 +265,6 @@
                             [ack()], Acc, state())
                            -> Acc.
 
+-callback handled_bump_reduce_memory_use(state()) -> state().
+
 info_keys() -> ?INFO_KEYS.
