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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 VMware, Inc. All rights reserved.
%%
-module(serialiser).
-behaviour(gen_server2).
-export([start_link/0, submit/2]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-spec(start_link/0 :: () -> {'ok', pid()} | {'error', any()}).
-spec(submit/2 ::
(pid() | atom(), fun (() -> A) | {atom(), atom(), [any()]}) -> A).
-endif.
%%----------------------------------------------------------------------------
-define(HIBERNATE_AFTER_MIN, 1000).
-define(DESIRED_HIBERNATE, 10000).
%%----------------------------------------------------------------------------
start_link() ->
gen_server2:start_link(?MODULE, [], [{timeout, infinity}]).
submit(Pid, Fun) ->
gen_server2:call(Pid, {run, Fun}, infinity).
%%----------------------------------------------------------------------------
init([]) ->
{ok, nostate, hibernate,
{backoff, ?HIBERNATE_AFTER_MIN, ?HIBERNATE_AFTER_MIN, ?DESIRED_HIBERNATE}}.
handle_call({run, Fun}, _From, State) ->
{reply, run(Fun), State, hibernate};
handle_call(Msg, _From, State) ->
{stop, {unexpected_call, Msg}, State}.
handle_cast(Msg, State) ->
{stop, {unexpected_cast, Msg}, State}.
handle_info(Msg, State) ->
{stop, {unexpected_info, Msg}, State}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
terminate(_Reason, State) ->
State.
%%----------------------------------------------------------------------------
run({M, F, A}) -> apply(M, F, A);
run(Fun) -> Fun().
|
