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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2015-2015. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%% This module is created to be able to execute on ERTS versions both
%% earlier and later than 7.0.
-module(inets_time_compat).
%% We don't want warnings about the use of erlang:now/0 in
%% this module.
-compile(nowarn_deprecated_function).
-export([monotonic_time/0,
timestamp/0,
unique_integer/0,
unique_integer/1]).
monotonic_time() ->
try
erlang:monotonic_time()
catch
error:undef ->
%% Use Erlang system time as monotonic time
erlang_system_time_fallback()
end.
timestamp() ->
try
erlang:timestamp()
catch
error:undef ->
erlang:now()
end.
unique_integer() ->
try
erlang:unique_integer()
catch
error:undef ->
erlang_system_time_fallback()
end.
unique_integer(Modifiers) ->
try
erlang:unique_integer(Modifiers)
catch
error:badarg ->
erlang:error(badarg, [Modifiers]);
error:undef ->
erlang_system_time_fallback()
end.
erlang_system_time_fallback() ->
{MS, S, US} = erlang:now(),
(MS*1000000+S)*1000000+US.
|
