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diff --git a/src/pmon.erl b/src/pmon.erl
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--- a/src/pmon.erl
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@@ -1,96 +0,0 @@
-%% 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 GoPivotal, Inc.
-%% Copyright (c) 2011-2014 GoPivotal, Inc. All rights reserved.
-%%
-
--module(pmon).
-
--export([new/0, new/1, monitor/2, monitor_all/2, demonitor/2,
- is_monitored/2, erase/2, monitored/1, is_empty/1]).
-
--compile({no_auto_import, [monitor/2]}).
-
--record(state, {dict, module}).
-
--ifdef(use_specs).
-
-%%----------------------------------------------------------------------------
-
--export_type([?MODULE/0]).
-
--opaque(?MODULE() :: #state{dict :: dict:dict(),
- module :: atom()}).
-
--type(item() :: pid() | {atom(), node()}).
-
--spec(new/0 :: () -> ?MODULE()).
--spec(new/1 :: ('erlang' | 'delegate') -> ?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() -> new(erlang).
-
-new(Module) -> #state{dict = dict:new(),
- module = Module}.
-
-monitor(Item, S = #state{dict = M, module = Module}) ->
- case dict:is_key(Item, M) of
- true -> S;
- false -> case node_alive_shortcut(Item) of
- true -> Ref = Module:monitor(process, Item),
- S#state{dict = dict:store(Item, Ref, M)};
- false -> self() ! {'DOWN', fake_ref, process, Item,
- nodedown},
- S
- end
- end.
-
-monitor_all([], S) -> S; %% optimisation
-monitor_all([Item], S) -> monitor(Item, S); %% optimisation
-monitor_all(Items, S) -> lists:foldl(fun monitor/2, S, Items).
-
-demonitor(Item, S = #state{dict = M, module = Module}) ->
- case dict:find(Item, M) of
- {ok, MRef} -> Module:demonitor(MRef),
- S#state{dict = dict:erase(Item, M)};
- error -> M
- end.
-
-is_monitored(Item, #state{dict = M}) -> dict:is_key(Item, M).
-
-erase(Item, S = #state{dict = M}) -> S#state{dict = dict:erase(Item, M)}.
-
-monitored(#state{dict = M}) -> dict:fetch_keys(M).
-
-is_empty(#state{dict = M}) -> dict:size(M) == 0.
-
-%%----------------------------------------------------------------------------
-
-%% We check here to see if the node is alive in order to avoid trying
-%% to connect to it if it isn't - this can cause substantial
-%% slowdowns. We can't perform this shortcut if passed {Name, Node}
-%% since we would need to convert that into a pid for the fake 'DOWN'
-%% message, so we always return true here - but that's OK, it's just
-%% an optimisation.
-node_alive_shortcut(P) when is_pid(P) ->
- lists:member(node(P), [node() | nodes()]);
-node_alive_shortcut({_Name, _Node}) ->
- true.