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%%--------------------------------------------------------------------
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2000-2009. 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%
%%
%%
%%----------------------------------------------------------------------
%% File : CosTime_TimeService_impl.erl
%% Purpose :
%%----------------------------------------------------------------------
-module('CosTime_TimeService_impl').
%%--------------- INCLUDES -----------------------------------
-include("cosTimeApp.hrl").
%%--------------- EXPORTS ------------------------------------
%%--------------- External -----------------------------------
%% Interface functions
-export([universal_time/2, secure_universal_time/2, new_universal_time/5]).
-export([uto_from_utc/3, new_interval/4]).
%%--------------- gen_server specific exports ----------------
-export([handle_info/2, code_change/3]).
-export([init/1, terminate/2]).
%% Data structures
-record(state,
{tdf,
inaccuracy}).
%% Data structures constructors
-define(get_InitState(T,I),
#state{tdf = T,
inaccuracy = I}).
%% Data structures selectors
-define(get_Inaccuracy(S), S#state.inaccuracy).
-define(get_Tdf(S), S#state.tdf).
%% Data structures modifiers
%% MISC
%%-----------------------------------------------------------%
%% function : handle_info, code_change
%% Arguments:
%% Returns :
%% Effect : Functions demanded by the gen_server module.
%%------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
handle_info(_Info, State) ->
?debug_print("INFO: ~p~n", [_Info]),
{noreply, State}.
%%----------------------------------------------------------%
%% function : init, terminate
%% Arguments:
%%-----------------------------------------------------------
init([Tdf, Inaccuracy]) ->
process_flag(trap_exit, true),
{ok, ?get_InitState(Tdf, Inaccuracy)}.
terminate(_Reason, _State) ->
ok.
%%-----------------------------------------------------------
%%------- Exported external functions -----------------------
%%-----------------------------------------------------------
%%----------------------------------------------------------%
%% function : universal_time
%% Arguments: -
%% Returns : CosTime::UTO |
%% {'EXCEPTION", #'CosTime_TimeUnavailable'{}}
%% NOTE : cosTime:create_universal_time will raise the correct
%% exception.
%%-----------------------------------------------------------
universal_time(OE_THIS, State) ->
{ok, Time} = create_universal_time(),
Inaccuracy = ?get_Inaccuracy(State),
Utc = #'TimeBase_UtcT'{time=Time, inacclo = ?low_TimeT(Inaccuracy),
inacchi = ?high_TimeT(Inaccuracy),
tdf = ?get_Tdf(State)},
{reply, 'CosTime_UTO':oe_create([Utc, OE_THIS], [{pseudo,true}|?CREATE_OPTS]), State}.
%%----------------------------------------------------------%
%% function : secure_universal_time
%% Arguments:
%% Returns : {'EXCEPTION", #'CosTime_TimeUnavailable'{}}
%%-----------------------------------------------------------
secure_universal_time(_OE_THIS, _State) ->
corba:raise(#'CosTime_TimeUnavailable'{}).
%%----------------------------------------------------------%
%% function : new_universal_time
%% Arguments: Time - TimeBase::TimeT
%% Inaccuracy - TimeBase::InaccuracyT inaccuracy
%% Tdf - TimeBase::TdfT
%% Returns : CosTime::UTO
%%-----------------------------------------------------------
new_universal_time(OE_THIS, State, Time, Inaccuracy, Tdf) when
is_integer(Time) andalso is_integer(Inaccuracy) andalso is_integer(Tdf) andalso
Tdf=<12 andalso Inaccuracy=<?max_Inaccuracy andalso Time=<?max_TimeT ->
Utc = #'TimeBase_UtcT'{time=Time, inacclo = ?low_TimeT(Inaccuracy),
inacchi = ?high_TimeT(Inaccuracy), tdf = Tdf},
{reply, 'CosTime_UTO':oe_create([Utc, OE_THIS], [{pseudo,true}|?CREATE_OPTS]), State};
new_universal_time(_, _, _, _, _) ->
corba:raise(#'BAD_PARAM'{completion_status=?COMPLETED_NO}).
%%----------------------------------------------------------%
%% function : uto_from_utc
%% Arguments: Utc - TimeBase::UtcT
%% Returns : CosTime::UTO
%%-----------------------------------------------------------
uto_from_utc(OE_THIS, State, Utc) when is_record(Utc, 'TimeBase_UtcT') ->
{reply, 'CosTime_UTO':oe_create([Utc, OE_THIS],[{pseudo,true}|?CREATE_OPTS]),State};
uto_from_utc(_, _, _) ->
corba:raise(#'BAD_PARAM'{completion_status=?COMPLETED_NO}).
%%----------------------------------------------------------%
%% function : new_interval
%% Arguments: Lower - TimeBase::TimeT
%% Upper - TimeBase::TimeT
%% Returns : CosTime::TIO
%%-----------------------------------------------------------
new_interval(OE_THIS, State, Lower, Upper) when is_integer(Lower) andalso is_integer(Upper) andalso
Lower=<Upper ->
{reply, 'CosTime_TIO':oe_create([#'TimeBase_IntervalT'{lower_bound=Lower,
upper_bound=Upper},
?get_Tdf(State),
OE_THIS],
[{pseudo,true}|?CREATE_OPTS]), State};
new_interval(_, _, _, _) ->
corba:raise(#'BAD_PARAM'{completion_status=?COMPLETED_NO}).
%%--------------- LOCAL FUNCTIONS ----------------------------
%%-----------------------------------------------------------%
%% function : create_universal_utc
%% Arguments: -
%% Returns : TimeT or raises exception.
%% Effect : Creates a universal time; if time unavailable we
%% must raise CosTime_TimeUnavailable.
%% NOTE : 'datetime_to_gregorian_seconds' use year 0 as time
%% base. We want to use 15 october 1582, 00:00 as base.
%%------------------------------------------------------------
create_universal_time() ->
%% Time is supposed to be #100 nano-secs passed.
%% We add micro secs for a greater precision.
{MS,S,US} = erlang:timestamp(),
case catch calendar:datetime_to_gregorian_seconds(
calendar:now_to_universal_time({MS,S,US})) of
Secs when is_integer(Secs) ->
{ok, (Secs-?ABSOLUTE_TIME_DIFF)*10000000 + US*10};
_ ->
corba:raise(#'CosTime_TimeUnavailable'{})
end.
%%--------------- MISC FUNCTIONS, E.G. DEBUGGING -------------
%%--------------- END OF MODULE ------------------------------
|
