This commit is contained in:
Feng Lee 2015-04-27 21:13:29 +08:00
parent 547f192cae
commit 153f8c2dba
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%%%-----------------------------------------------------------------------------
%%% @Copyright (C) 2012-2015, Feng Lee <feng@emqtt.io>
%%%
%%% Permission is hereby granted, free of charge, to any person obtaining a copy
%%% of this software and associated documentation files (the "Software"), to deal
%%% in the Software without restriction, including without limitation the rights
%%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%%% copies of the Software, and to permit persons to whom the Software is
%%% furnished to do so, subject to the following conditions:
%%%
%%% The above copyright notice and this permission notice shall be included in all
%%% copies or substantial portions of the Software.
%%%
%%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
%%% SOFTWARE.
%%%-----------------------------------------------------------------------------
%%% @doc
%%% emqttd tick.
%%%
%%% @end
%%%-----------------------------------------------------------------------------
-module(emqttd_tick).
-export([new/1, tick/1]).
-record(tick_state, {interval, timer}).
new(Interval) ->
Delay = if
Interval == 0 -> 0;
true -> random:uniform(Interval)
end,
tick(Delay, #tick_state{interval = Interval}).
tick(Tick = #tick_state{interval = Interval}) ->
tick(Interval, Tick).
tick(Delay, Tick) when is_record(Tick, tick_state) ->
Tick#tick_state{timer = erlang:send_after(Delay * 1000, self(), tick)}.