diff options
Diffstat (limited to 'lib/inets/src/inets_app/inets_time_compat.erl')
-rw-r--r-- | lib/inets/src/inets_app/inets_time_compat.erl | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/lib/inets/src/inets_app/inets_time_compat.erl b/lib/inets/src/inets_app/inets_time_compat.erl new file mode 100644 index 0000000000..475f0685dc --- /dev/null +++ b/lib/inets/src/inets_app/inets_time_compat.erl @@ -0,0 +1,72 @@ +%% +%% %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. |