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diff --git a/src/dmon.erl b/src/dmon.erl
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-%% The contents of this file are subject to the Mozilla Public License
-%% Version 1.1 (the "License"); you may not use this file except in
-%% compliance with the License. You may obtain a copy of the License
-%% at http://www.mozilla.org/MPL/
-%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and
-%% limitations under the License.
-%%
-%% The Original Code is RabbitMQ.
-%%
-%% The Initial Developer of the Original Code is VMware, Inc.
-%% Copyright (c) 2011-2013 VMware, Inc. All rights reserved.
-%%
-
--module(dmon).
-
--export([new/0, monitor/2, monitor_all/2, demonitor/2, is_monitored/2, erase/2,
- monitored/1, is_empty/1]).
-
--compile({no_auto_import, [monitor/2]}).
-
--ifdef(use_specs).
-
-%%----------------------------------------------------------------------------
-
--export_type([?MODULE/0]).
-
--opaque(?MODULE() :: dict()).
-
--type(item() :: pid() | {atom(), node()}).
-
--spec(new/0 :: () -> ?MODULE()).
--spec(monitor/2 :: (item(), ?MODULE()) -> ?MODULE()).
--spec(monitor_all/2 :: ([item()], ?MODULE()) -> ?MODULE()).
--spec(demonitor/2 :: (item(), ?MODULE()) -> ?MODULE()).
--spec(is_monitored/2 :: (item(), ?MODULE()) -> boolean()).
--spec(erase/2 :: (item(), ?MODULE()) -> ?MODULE()).
--spec(monitored/1 :: (?MODULE()) -> [item()]).
--spec(is_empty/1 :: (?MODULE()) -> boolean()).
-
--endif.
-
-new() -> dict:new().
-
-monitor(Item, M) ->
- case dict:is_key(Item, M) of
- true -> M;
- false -> dict:store(Item, delegate:monitor(Item), M)
- end.
-
-monitor_all([], M) -> M; %% optimisation
-monitor_all([Item], M) -> monitor(Item, M); %% optimisation
-monitor_all(Items, M) -> lists:foldl(fun monitor/2, M, Items).
-
-demonitor(Item, M) ->
- case dict:find(Item, M) of
- {ok, MRef} -> delegate:demonitor(Item, MRef),
- dict:erase(Item, M);
- error -> M
- end.
-
-is_monitored(Item, M) -> dict:is_key(Item, M).
-
-erase(Item, M) -> dict:erase(Item, M).
-
-monitored(M) -> dict:fetch_keys(M).
-
-is_empty(M) -> dict:size(M) == 0.