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Diffstat (limited to 'gcc/ada/a-reatim.adb')
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1 files changed, 208 insertions, 0 deletions
diff --git a/gcc/ada/a-reatim.adb b/gcc/ada/a-reatim.adb new file mode 100644 index 00000000000..8854922d200 --- /dev/null +++ b/gcc/ada/a-reatim.adb @@ -0,0 +1,208 @@ +------------------------------------------------------------------------------ +-- -- +-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- A D A . R E A L _ T I M E -- +-- -- +-- B o d y -- +-- -- +-- $Revision: 1.34 $ +-- -- +-- Copyright (C) 1991-2001, Florida State University -- +-- -- +-- GNARL is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNARL is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNARL; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. It is -- +-- now maintained by Ada Core Technologies Inc. in cooperation with Florida -- +-- State University (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +with System.Task_Primitives.Operations; +-- used for Monotonic_Clock + +package body Ada.Real_Time is + + --------- + -- "*" -- + --------- + + -- Note that Constraint_Error may be propagated + + function "*" (Left : Time_Span; Right : Integer) return Time_Span is + begin + return Time_Span (Duration (Left) * Right); + end "*"; + + function "*" (Left : Integer; Right : Time_Span) return Time_Span is + begin + return Time_Span (Left * Duration (Right)); + end "*"; + + --------- + -- "+" -- + --------- + + -- Note that Constraint_Error may be propagated + + function "+" (Left : Time; Right : Time_Span) return Time is + begin + return Time (Duration (Left) + Duration (Right)); + end "+"; + + function "+" (Left : Time_Span; Right : Time) return Time is + begin + return Time (Duration (Left) + Duration (Right)); + end "+"; + + function "+" (Left, Right : Time_Span) return Time_Span is + begin + return Time_Span (Duration (Left) + Duration (Right)); + end "+"; + + --------- + -- "-" -- + --------- + + -- Note that Constraint_Error may be propagated + + function "-" (Left : Time; Right : Time_Span) return Time is + begin + return Time (Duration (Left) - Duration (Right)); + end "-"; + + function "-" (Left, Right : Time) return Time_Span is + begin + return Time_Span (Duration (Left) - Duration (Right)); + end "-"; + + function "-" (Left, Right : Time_Span) return Time_Span is + begin + return Time_Span (Duration (Left) - Duration (Right)); + end "-"; + + function "-" (Right : Time_Span) return Time_Span is + begin + return Time_Span_Zero - Right; + end "-"; + + --------- + -- "/" -- + --------- + + -- Note that Constraint_Error may be propagated + + function "/" (Left, Right : Time_Span) return Integer is + begin + return Integer (Duration (Left) / Duration (Right)); + end "/"; + + function "/" (Left : Time_Span; Right : Integer) return Time_Span is + begin + return Time_Span (Duration (Left) / Right); + end "/"; + + ----------- + -- Clock -- + ----------- + + function Clock return Time is + begin + return Time (System.Task_Primitives.Operations.Monotonic_Clock); + end Clock; + + ------------------ + -- Microseconds -- + ------------------ + + function Microseconds (US : Integer) return Time_Span is + begin + return Time_Span_Unit * US * 1_000; + end Microseconds; + + ------------------ + -- Milliseconds -- + ------------------ + + function Milliseconds (MS : Integer) return Time_Span is + begin + return Time_Span_Unit * MS * 1_000_000; + end Milliseconds; + + ----------------- + -- Nanoseconds -- + ----------------- + + function Nanoseconds (NS : Integer) return Time_Span is + begin + return Time_Span_Unit * NS; + end Nanoseconds; + + ----------- + -- Split -- + ----------- + + procedure Split (T : Time; SC : out Seconds_Count; TS : out Time_Span) is + begin + -- Extract the integer part of T + + if T = 0.0 then + SC := 0; + else + SC := Seconds_Count (Time_Span'(T - 0.5)); + end if; + + -- Since we loose precision when converting a time value to float, + -- we need to add this check + + if Time (SC) > T then + SC := SC - 1; + end if; + + TS := T - Time (SC); + end Split; + + ------------- + -- Time_Of -- + ------------- + + function Time_Of (SC : Seconds_Count; TS : Time_Span) return Time is + begin + return Time (SC) + TS; + end Time_Of; + + ----------------- + -- To_Duration -- + ----------------- + + function To_Duration (TS : Time_Span) return Duration is + begin + return Duration (TS); + end To_Duration; + + ------------------ + -- To_Time_Span -- + ------------------ + + function To_Time_Span (D : Duration) return Time_Span is + begin + return Time_Span (D); + end To_Time_Span; + +end Ada.Real_Time; |