------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . R E A L _ T I M E -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2019, 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 -- -- . -- -- -- -- 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 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;