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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . R E A L _ T I M E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- GNAT 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. GNAT 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 GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System.Task_Primitives.Operations;
pragma Elaborate_All (System.Task_Primitives.Operations);
package Ada.Real_Time is
type Time is private;
Time_First : constant Time;
Time_Last : constant Time;
Time_Unit : constant := 10#1.0#E-9;
type Time_Span is private;
Time_Span_First : constant Time_Span;
Time_Span_Last : constant Time_Span;
Time_Span_Zero : constant Time_Span;
Time_Span_Unit : constant Time_Span;
Tick : constant Time_Span;
function Clock return Time;
function "+" (Left : Time; Right : Time_Span) return Time;
function "+" (Left : Time_Span; Right : Time) return Time;
function "-" (Left : Time; Right : Time_Span) return Time;
function "-" (Left : Time; Right : Time) return Time_Span;
function "<" (Left, Right : Time) return Boolean;
function "<=" (Left, Right : Time) return Boolean;
function ">" (Left, Right : Time) return Boolean;
function ">=" (Left, Right : Time) return Boolean;
function "+" (Left, Right : Time_Span) return Time_Span;
function "-" (Left, Right : Time_Span) return Time_Span;
function "-" (Right : Time_Span) return Time_Span;
function "*" (Left : Time_Span; Right : Integer) return Time_Span;
function "*" (Left : Integer; Right : Time_Span) return Time_Span;
function "/" (Left, Right : Time_Span) return Integer;
function "/" (Left : Time_Span; Right : Integer) return Time_Span;
function "abs" (Right : Time_Span) return Time_Span;
function "<" (Left, Right : Time_Span) return Boolean;
function "<=" (Left, Right : Time_Span) return Boolean;
function ">" (Left, Right : Time_Span) return Boolean;
function ">=" (Left, Right : Time_Span) return Boolean;
function To_Duration (TS : Time_Span) return Duration;
function To_Time_Span (D : Duration) return Time_Span;
function Nanoseconds (NS : Integer) return Time_Span;
function Microseconds (US : Integer) return Time_Span;
function Milliseconds (MS : Integer) return Time_Span;
-- Seconds_Count needs 64 bits, since Time has the full range of
-- Duration. The delta of Duration is 10 ** (-9), so the maximum
-- number of seconds is 2**63/10**9 = 8*10**9 which does not quite
-- fit in 32 bits.
type Seconds_Count is range -2 ** 63 .. 2 ** 63 - 1;
procedure Split (T : Time; SC : out Seconds_Count; TS : out Time_Span);
function Time_Of (SC : Seconds_Count; TS : Time_Span) return Time;
private
type Time is new Duration;
Time_First : constant Time := Time'First;
Time_Last : constant Time := Time'Last;
type Time_Span is new Duration;
Time_Span_First : constant Time_Span := Time_Span'First;
Time_Span_Last : constant Time_Span := Time_Span'Last;
Time_Span_Zero : constant Time_Span := 0.0;
Time_Span_Unit : constant Time_Span := 10#1.0#E-9;
Tick : constant Time_Span :=
Time_Span (System.Task_Primitives.Operations.RT_Resolution);
-- Time and Time_Span are represented in 64-bit Duration value in
-- in nanoseconds. For example, 1 second and 1 nanosecond is
-- represented as the stored integer 1_000_000_001.
pragma Import (Intrinsic, "<");
pragma Import (Intrinsic, "<=");
pragma Import (Intrinsic, ">");
pragma Import (Intrinsic, ">=");
pragma Import (Intrinsic, "abs");
end Ada.Real_Time;
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