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Turnbull China Bikeride
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1996-02-12
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5KB
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109 lines
------------------------------------------------------------------------------
-- --
-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . T A S K _ C L O C K --
-- --
-- S p e c --
-- (Compiler Interface) --
-- --
-- $Revision: 1.12 $ --
-- --
-- Copyright (C) 1991, 92, 93, 94, 1995 Free Software Foundation, Inc. --
-- --
-- GNARL 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 2, or (at your option) any later ver- --
-- sion. GNARL 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
-- State University (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This package interfaces with the Ada RTS and defines the low-level
-- timer operations.
-- Note: this package is not a direct part of the compiler interface, but
-- it is used by the System.Task_Timer spec, which is part of the interface.
with Interfaces;
package System.Task_Clock is
type Stimespec is private;
Stimespec_First : constant Stimespec;
Stimespec_Last : constant Stimespec;
Stimespec_Zero : constant Stimespec;
Stimespec_Unit : constant Stimespec;
Stimespec_Sec_Unit : constant Stimespec;
function Stimespec_Seconds (TV : Stimespec) return Integer;
function Stimespec_NSeconds (TV : Stimespec) return Integer;
function Time_Of (S, NS : Integer) return Stimespec;
function Stimespec_To_Duration (TV : Stimespec) return Duration;
function Duration_To_Stimespec (Time : Duration) return Stimespec;
function "-" (TV : Stimespec) return Stimespec;
function "+" (LTV, RTV : Stimespec) return Stimespec;
function "-" (LTV, RTV : Stimespec) return Stimespec;
function "*" (TV : Stimespec; N : Integer) return Stimespec;
function "/" (TV : Stimespec; N : integer) return Stimespec;
function "/" (LTV, RTV : Stimespec) return Integer;
function "<" (LTV, RTV : Stimespec) return Boolean;
function "<=" (LTV, RTV : Stimespec) return Boolean;
function ">" (LTV, RTV : Stimespec) return Boolean;
function ">=" (LTV, RTV : Stimespec) return Boolean;
private
-- Stimespec is represented in 64-bit Integer. It represents time in
-- nanoseconds. For example, 1 second and 1 nanosecond is represented
-- as "1_000_000_001"
type Stimespec is new Interfaces.Integer_64;
Stimespec_First : constant Stimespec := Stimespec'First;
Stimespec_Last : constant Stimespec := Stimespec'Last;
Stimespec_Zero : constant Stimespec := 0;
Stimespec_Unit : constant Stimespec := 1;
Stimespec_Sec_Unit : constant Stimespec := 10#1#E9;
end System.Task_Clock;