------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . R E A L _ T I M E -- -- -- -- S p e c -- -- -- -- Copyright (C) 2001-2023, AdaCore -- -- -- -- 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Ravenscar version of this package for generic bare board targets with System.OS_Interface; package Ada.Real_Time with SPARK_Mode, Abstract_State => (Clock_Time with Synchronous), Initializes => Clock_Time is pragma Assert (System.OS_Interface.Ticks_Per_Second >= 50_000, "Ada RM D.8 (30) requires " & "that Time_Unit shall be less than or equal to 20 microseconds"); type Time is private; Time_First : constant Time; Time_Last : constant Time; Time_Unit : constant := 1.0 / System.OS_Interface.Ticks_Per_Second; -- The BB platforms use a time stamp counter driven by the system clock, -- where the duration of the clock tick (Time_Unit) depends on the speed -- of the underlying hardware. The system clock frequency is used here to -- determine Time_Unit. 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; Right : Time_Span) return Time with Global => null; function "-" (Left : Time; Right : Time) return Time_Span with Global => null; function "+" (Left : Time_Span; Right : Time) return Time is (Right + Left) 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); -- Seconds_Count needs 64 bits. Time is a 64-bits unsigned integer -- representing clock ticks, and if the clock frequency is lower than -- 2 ** 32 Hz (~ 4 GHz), which is the case so far, we need more than 32 -- bits to represent the number of seconds. Additionally, Time is -- unsigned, so Seconds_Count is always positive. type Seconds_Count is range 0 .. 2 ** 63 - 1; 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); type Time is new System.OS_Interface.Time; Time_First : constant Time := Time'First; Time_Last : constant Time := Time'Last; type Time_Span is new System.OS_Interface.Time_Span; 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; Time_Span_Unit : constant Time_Span := 1; Tick : constant Time_Span := 1; 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;