add emqttd_time module
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%%--------------------------------------------------------------------
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%% Copyright (c) 2012-2016 Feng Lee <feng@emqtt.io>.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-module(emqttd_time).
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-export([seed/0, now_to_secs/0, now_to_secs/1, now_to_ms/0, now_to_ms/1]).
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seed() ->
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case erlang:function_exported(erlang, timestamp, 0) of
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true -> random:seed(erlang:timestamp()); %% R18
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false -> random:seed(os:timestamp()) %% Compress now() deprecated warning...
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end.
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now_to_secs() -> now_to_secs(os:timestamp()).
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now_to_secs({MegaSecs, Secs, _MicroSecs}) ->
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MegaSecs * 1000000 + Secs.
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now_to_ms() -> now_to_ms(os:timestamp()).
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now_to_ms({MegaSecs, Secs, MicroSecs}) ->
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(MegaSecs * 1000000 + Secs) * 1000 + round(MicroSecs/1000).
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%%--------------------------------------------------------------------
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%% Copyright (c) 2016 Feng Lee <feng@emqtt.io>.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-module(emqttd_time_tests).
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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test_() ->
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emqttd_time:seed(),
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emqttd_time:now_to_secs(),
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emqttd_time:now_to_ms().
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-endif.
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