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186 | ------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . R E A L _ T I M E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2023, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- 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 with
SPARK_Mode,
Abstract_State => (Clock_Time with Synchronous),
Initializes => Clock_Time
is
pragma Annotate (GNATprove, Always_Return, Real_Time);
pragma Compile_Time_Error
(Duration'Size /= 64,
"this version of Ada.Real_Time requires 64-bit Duration");
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 with
Volatile_Function,
Global => Clock_Time;
function "+" (Left : Time; Right : Time_Span) return Time with
Global => null;
function "+" (Left : Time_Span; Right : Time) return Time with
Global => null;
function "-" (Left : Time; Right : Time_Span) return Time with
Global => null;
function "-" (Left : Time; Right : Time) return Time_Span with
Global => null;
function "<" (Left, Right : Time) return Boolean with
Global => null;
function "<=" (Left, Right : Time) return Boolean with
Global => null;
function ">" (Left, Right : Time) return Boolean with
Global => null;
function ">=" (Left, Right : Time) return Boolean with
Global => null;
function "+" (Left, Right : Time_Span) return Time_Span with
Global => null;
function "-" (Left, Right : Time_Span) return Time_Span with
Global => null;
function "-" (Right : Time_Span) return Time_Span with
Global => null;
function "*" (Left : Time_Span; Right : Integer) return Time_Span with
Global => null;
function "*" (Left : Integer; Right : Time_Span) return Time_Span with
Global => null;
function "/" (Left, Right : Time_Span) return Integer with
Global => null;
function "/" (Left : Time_Span; Right : Integer) return Time_Span with
Global => null;
function "abs" (Right : Time_Span) return Time_Span with
Global => null;
function "<" (Left, Right : Time_Span) return Boolean with
Global => null;
function "<=" (Left, Right : Time_Span) return Boolean with
Global => null;
function ">" (Left, Right : Time_Span) return Boolean with
Global => null;
function ">=" (Left, Right : Time_Span) return Boolean with
Global => null;
function To_Duration (TS : Time_Span) return Duration with
Global => null;
function To_Time_Span (D : Duration) return Time_Span with
Global => null;
function Nanoseconds (NS : Integer) return Time_Span with
Global => null;
function Microseconds (US : Integer) return Time_Span with
Global => null;
function Milliseconds (MS : Integer) return Time_Span with
Global => null;
function Seconds (S : Integer) return Time_Span with
Global => null;
pragma Ada_05 (Seconds);
function Minutes (M : Integer) return Time_Span with
Global => null;
pragma Ada_05 (Minutes);
type Seconds_Count is new Long_Long_Integer;
-- Seconds_Count needs 64 bits, since the type 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.
-- However, rather than make this explicitly 64-bits we derive from
-- Long_Long_Integer. In normal usage this will have the same effect. But
-- in the case of CodePeer with a target configuration file with a maximum
-- integer size of 32, it allows analysis of this unit.
procedure Split (T : Time; SC : out Seconds_Count; TS : out Time_Span)
with
Global => null;
function Time_Of (SC : Seconds_Count; TS : Time_Span) return Time
with
Global => null;
private
pragma SPARK_Mode (Off);
-- Time and Time_Span are represented in 64-bit Duration value in
-- nanoseconds. For example, 1 second and 1 nanosecond is represented
-- as the stored integer 1_000_000_001. This is for the 64-bit Duration
-- case, not clear if this also is used for 32-bit Duration values.
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);
pragma Import (Intrinsic, "<");
pragma Import (Intrinsic, "<=");
pragma Import (Intrinsic, ">");
pragma Import (Intrinsic, ">=");
pragma Import (Intrinsic, "abs");
pragma Inline (Microseconds);
pragma Inline (Milliseconds);
pragma Inline (Nanoseconds);
pragma Inline (Seconds);
pragma Inline (Minutes);
end Ada.Real_Time;
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