| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- A D A . R E A L _ T I M E -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1991-1994, Florida State University -- |
| -- Copyright (C) 1995-2003, Ada Core Technologies -- |
| -- -- |
| -- 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. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| 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 |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time_Span (Duration (Left) * Right); |
| end "*"; |
| |
| function "*" (Left : Integer; Right : Time_Span) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time_Span (Left * Duration (Right)); |
| end "*"; |
| |
| --------- |
| -- "+" -- |
| --------- |
| |
| -- Note that Constraint_Error may be propagated |
| |
| function "+" (Left : Time; Right : Time_Span) return Time is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time (Duration (Left) + Duration (Right)); |
| end "+"; |
| |
| function "+" (Left : Time_Span; Right : Time) return Time is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time (Duration (Left) + Duration (Right)); |
| end "+"; |
| |
| function "+" (Left, Right : Time_Span) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| 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 |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time (Duration (Left) - Duration (Right)); |
| end "-"; |
| |
| function "-" (Left, Right : Time) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time_Span (Duration (Left) - Duration (Right)); |
| end "-"; |
| |
| function "-" (Left, Right : Time_Span) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time_Span (Duration (Left) - Duration (Right)); |
| end "-"; |
| |
| function "-" (Right : Time_Span) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Time_Span_Zero - Right; |
| end "-"; |
| |
| --------- |
| -- "/" -- |
| --------- |
| |
| -- Note that Constraint_Error may be propagated |
| |
| function "/" (Left, Right : Time_Span) return Integer is |
| pragma Unsuppress (Overflow_Check); |
| begin |
| return Integer (Duration (Left) / Duration (Right)); |
| end "/"; |
| |
| function "/" (Left : Time_Span; Right : Integer) return Time_Span is |
| pragma Unsuppress (Overflow_Check); |
| 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 |
| T_Val : Time; |
| |
| begin |
| -- Special-case for Time_First, whose absolute value is anomalous, |
| -- courtesy of two's complement. |
| |
| if T = Time_First then |
| T_Val := abs (Time_Last); |
| else |
| T_Val := abs (T); |
| end if; |
| |
| -- Extract the integer part of T, truncating towards zero. |
| |
| if T_Val < 0.5 then |
| SC := 0; |
| else |
| SC := Seconds_Count (Time_Span'(T_Val - 0.5)); |
| end if; |
| |
| if T < 0.0 then |
| SC := -SC; |
| end if; |
| |
| -- If original time is negative, need to truncate towards negative |
| -- infinity, to make TS non-negative, as per ARM. |
| |
| if Time (SC) > T then |
| SC := SC - 1; |
| end if; |
| |
| TS := Time_Span (Duration (T) - Duration (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; |
