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1996-09-28
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3KB
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61 lines
------------------------------------------------------------------------------
-- --
-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . T A S K _ C L O C K . M A C H I N E _ S P E C I F I C S --
-- --
-- B o d y --
-- --
-- $Revision: 1.10 $ --
-- --
-- Copyright (c) 1991,1992,1993,1994,1995 FSU, All Rights Reserved --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU Library General Public License as published by the --
-- Free Software Foundation; either version 2, or (at your option) any --
-- later version. GNARL is distributed in the hope that it will be use- --
-- ful, but but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Gen- --
-- eral Library Public License for more details. You should have received --
-- a copy of the GNU Library General Public License along with GNARL; see --
-- file COPYING.LIB. If not, write to the Free Software Foundation, 675 --
-- Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
-- This package provides target machine specific Clock related definitions.
-- Portability of System.Task_Clock package is accomplished separating
-- this child package out. We only need to modify this package for
-- different targets.
-- This version of Clock uses the time() function, which is available
-- in most C libraries. This is the "universal" version; it is
-- only accurate to 1 second and is not the same time base used by
-- the tasking library System.Real_Time.Clock and delays, but will
-- work on systems without tasking or POSIX.
with Interfaces.C; use Interfaces.C;
package body System.Task_Clock.Machine_Specifics is
-----------
-- Clock --
-----------
function Clock return Stimespec is
function gnat_time return long;
pragma Import (C, gnat_time);
begin
return
Stimespec_Sec_Unit * Stimespec (gnat_time);
end Clock;
begin
Stimespec_Ticks := Time_Of (1, 0);
-- gnat_time has the resolution of 1 sec.
end System.Task_Clock.Machine_Specifics;