186 lines
7.7 KiB
Ada
186 lines
7.7 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . R E A L _ T I M E --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the contents of the part following the private keyword. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System.Task_Primitives.Operations;
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pragma Elaborate_All (System.Task_Primitives.Operations);
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package Ada.Real_Time with
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SPARK_Mode,
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Abstract_State => (Clock_Time with Synchronous),
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Initializes => Clock_Time
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is
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pragma Compile_Time_Error
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(Duration'Size /= 64,
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"this version of Ada.Real_Time requires 64-bit Duration");
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type Time is private;
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Time_First : constant Time;
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Time_Last : constant Time;
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Time_Unit : constant := 10#1.0#E-9;
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type Time_Span is private;
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Time_Span_First : constant Time_Span;
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Time_Span_Last : constant Time_Span;
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Time_Span_Zero : constant Time_Span;
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Time_Span_Unit : constant Time_Span;
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Tick : constant Time_Span;
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function Clock return Time with
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Volatile_Function,
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Global => Clock_Time;
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function "+" (Left : Time; Right : Time_Span) return Time with
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Global => null;
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function "+" (Left : Time_Span; Right : Time) return Time with
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Global => null;
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function "-" (Left : Time; Right : Time_Span) return Time with
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Global => null;
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function "-" (Left : Time; Right : Time) return Time_Span with
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Global => null;
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function "<" (Left, Right : Time) return Boolean with
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Global => null;
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function "<=" (Left, Right : Time) return Boolean with
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Global => null;
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function ">" (Left, Right : Time) return Boolean with
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Global => null;
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function ">=" (Left, Right : Time) return Boolean with
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Global => null;
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function "+" (Left, Right : Time_Span) return Time_Span with
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Global => null;
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function "-" (Left, Right : Time_Span) return Time_Span with
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Global => null;
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function "-" (Right : Time_Span) return Time_Span with
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Global => null;
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function "*" (Left : Time_Span; Right : Integer) return Time_Span with
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Global => null;
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function "*" (Left : Integer; Right : Time_Span) return Time_Span with
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Global => null;
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function "/" (Left, Right : Time_Span) return Integer with
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Global => null;
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function "/" (Left : Time_Span; Right : Integer) return Time_Span with
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Global => null;
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function "abs" (Right : Time_Span) return Time_Span with
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Global => null;
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function "<" (Left, Right : Time_Span) return Boolean with
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Global => null;
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function "<=" (Left, Right : Time_Span) return Boolean with
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Global => null;
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function ">" (Left, Right : Time_Span) return Boolean with
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Global => null;
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function ">=" (Left, Right : Time_Span) return Boolean with
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Global => null;
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function To_Duration (TS : Time_Span) return Duration with
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Global => null;
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function To_Time_Span (D : Duration) return Time_Span with
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Global => null;
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function Nanoseconds (NS : Integer) return Time_Span with
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Global => null;
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function Microseconds (US : Integer) return Time_Span with
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Global => null;
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function Milliseconds (MS : Integer) return Time_Span with
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Global => null;
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function Seconds (S : Integer) return Time_Span with
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Global => null;
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pragma Ada_05 (Seconds);
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function Minutes (M : Integer) return Time_Span with
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Global => null;
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pragma Ada_05 (Minutes);
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type Seconds_Count is new Long_Long_Integer;
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-- Seconds_Count needs 64 bits, since the type Time has the full range of
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-- Duration. The delta of Duration is 10 ** (-9), so the maximum number of
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-- seconds is 2**63/10**9 = 8*10**9 which does not quite fit in 32 bits.
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-- However, rather than make this explicitly 64-bits we derive from
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-- Long_Long_Integer. In normal usage this will have the same effect. But
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-- in the case of CodePeer with a target configuration file with a maximum
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-- integer size of 32, it allows analysis of this unit.
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procedure Split (T : Time; SC : out Seconds_Count; TS : out Time_Span)
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with
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Global => null;
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function Time_Of (SC : Seconds_Count; TS : Time_Span) return Time
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with
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Global => null;
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private
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pragma SPARK_Mode (Off);
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-- Time and Time_Span are represented in 64-bit Duration value in
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-- nanoseconds. For example, 1 second and 1 nanosecond is represented
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-- as the stored integer 1_000_000_001. This is for the 64-bit Duration
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-- case, not clear if this also is used for 32-bit Duration values.
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type Time is new Duration;
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Time_First : constant Time := Time'First;
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Time_Last : constant Time := Time'Last;
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type Time_Span is new Duration;
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Time_Span_First : constant Time_Span := Time_Span'First;
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Time_Span_Last : constant Time_Span := Time_Span'Last;
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Time_Span_Zero : constant Time_Span := 0.0;
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Time_Span_Unit : constant Time_Span := 10#1.0#E-9;
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Tick : constant Time_Span :=
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Time_Span (System.Task_Primitives.Operations.RT_Resolution);
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pragma Import (Intrinsic, "<");
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pragma Import (Intrinsic, "<=");
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pragma Import (Intrinsic, ">");
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pragma Import (Intrinsic, ">=");
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pragma Import (Intrinsic, "abs");
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pragma Inline (Microseconds);
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pragma Inline (Milliseconds);
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pragma Inline (Nanoseconds);
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pragma Inline (Seconds);
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pragma Inline (Minutes);
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end Ada.Real_Time;
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