------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . R E A L _ T I M E -- -- -- -- S p e c -- -- -- -- Copyright (C) 2001-2014, 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. -- -- -- -- -- -- -- -- -- -- -- -- 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; pragma Elaborate_All (System.OS_Interface); package Ada.Real_Time is type Time is private; Time_First : constant Time; Time_Last : constant Time; Time_Unit : constant Duration := 1.0 / Duration (System.OS_Interface.Ticks_Per_Second); -- This does not conform to the RM, which requires a named number here ??? -- These 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; function "+" (Left : Time; Right : Time_Span) return Time; function "-" (Left : Time; Right : Time_Span) return Time; function "-" (Left : Time; Right : Time) return Time_Span; function "+" (Left : Time_Span; Right : Time) return Time is (Right + Left); function "<" (Left, Right : Time) return Boolean; function "<=" (Left, Right : Time) return Boolean; function ">" (Left, Right : Time) return Boolean; function ">=" (Left, Right : Time) return Boolean; function "+" (Left, Right : Time_Span) return Time_Span; function "-" (Left, Right : Time_Span) return Time_Span; function "-" (Right : Time_Span) return Time_Span; function "*" (Left : Time_Span; Right : Integer) return Time_Span; function "*" (Left : Integer; Right : Time_Span) return Time_Span; function "/" (Left, Right : Time_Span) return Integer; function "/" (Left : Time_Span; Right : Integer) return Time_Span; function "abs" (Right : Time_Span) return Time_Span; function "<" (Left, Right : Time_Span) return Boolean; function "<=" (Left, Right : Time_Span) return Boolean; function ">" (Left, Right : Time_Span) return Boolean; function ">=" (Left, Right : Time_Span) return Boolean; function To_Duration (TS : Time_Span) return Duration; function To_Time_Span (D : Duration) return Time_Span; function Nanoseconds (NS : Integer) return Time_Span; function Microseconds (US : Integer) return Time_Span; function Milliseconds (MS : Integer) return Time_Span; function Seconds (S : Integer) return Time_Span; pragma Ada_05 (Seconds); function Minutes (M : Integer) return Time_Span; 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); function Time_Of (SC : Seconds_Count; TS : Time_Span) return Time; private 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;