gcc/ada/a-retide.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                   A D A . R E A L _ T I M E . D E L A Y S                --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --                             $Revision: 1.28 $
  10 --                                                                          --
  11 --             Copyright (C) 1991-1999 Florida State University             --
  12 --                                                                          --
  13 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNARL was developed by the GNARL team at Florida State University. It is --
  32 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  33 -- State University (http://www.gnat.com).                                  --
  34 --                                                                          --
  35 ------------------------------------------------------------------------------
  36
  37 with System.Task_Primitives.Operations;
  38 --  Used for Timed_Delay
  39
  40 with System.OS_Primitives;
  41 --  Used for Delay_Modes
  42
  43 package body Ada.Real_Time.Delays is
  44
  45    package STPO renames System.Task_Primitives.Operations;
  46    package OSP renames System.OS_Primitives;
  47
  48    -----------------
  49    -- Delay_Until --
  50    -----------------
  51
  52    procedure Delay_Until (T : Time) is
  53    begin
  54       STPO.Timed_Delay (STPO.Self, To_Duration (T), OSP.Absolute_RT);
  55    end Delay_Until;
  56
  57    -----------------
  58    -- To_Duration --
  59    -----------------
  60
  61    function To_Duration (T : Time) return Duration is
  62    begin
  63       return To_Duration (Time_Span (T));
  64    end To_Duration;
  65
  66 end Ada.Real_Time.Delays;