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Diffstat (limited to 'lib/cosTime/src/CosTime_TimeService_impl.erl')
| -rw-r--r-- | lib/cosTime/src/CosTime_TimeService_impl.erl | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/lib/cosTime/src/CosTime_TimeService_impl.erl b/lib/cosTime/src/CosTime_TimeService_impl.erl new file mode 100644 index 0000000000..bac4ae087c --- /dev/null +++ b/lib/cosTime/src/CosTime_TimeService_impl.erl @@ -0,0 +1,180 @@ +%%-------------------------------------------------------------------- +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2000-2009. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights 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} = now(), + 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 ------------------------------ + |