Package Name: system.time_operations

Return to: Package List


------------------------------------------------------------------------------
--                                                                          --
--                 GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS               --
--                                                                          --
--                 S Y S T E M . T I M E _ O P E R A T I O N S              --
--                                                                          --
--                                  S p e c                                 --
--                         (Version for new GNARL)                          --
--                                                                          --
--                             $Revision: 1.1 $                            --
--                                                                          --
--    Copyright (C) 1991,92,93,94,95,1996 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).                                  --
--                                                                          --

------------------------------------------------------------------------------

package System.Time_Operations is

   pragma Elaborate_Body;
   Clock_Delay_Correction : Duration;

   --  constant used to compensate clock inaccuracy due to clock resolution.
   function Clock return Duration;
   --  Returns "absolute" time, represented as an offset
   --  relative to "the Epoch".

   pragma Inline (Clock);
   procedure Delay_For (Rel_Time : Duration);
   --  Delay until an interval of length (at least) Rel_Time has passed.

   pragma Inline (Delay_For);
   procedure Delay_Until (Abs_Time : Duration);
   --  Delay until Clock has reached (at least) Abs_Time.

   pragma Inline (Delay_Until);
end System.Time_Operations;