| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- A D A . R E A L _ T I M E -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2022, 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; |
