gcc/ada/s-tadert.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                  SYSTEM.TASKING.ASYNC_DELAYS.ENQUEUE_RT                  --
   6 --                                                                          --
   7 --                                B o d y                                   --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1998-2001 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University. It is --
  31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  32 -- State University (http://www.gnat.com).                                  --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Real_Time;
  37 with Ada.Real_Time.Delays;
  38 with System.Task_Primitives.Operations;
  39 with System.Tasking.Initialization;
  40
  41 function System.Tasking.Async_Delays.Enqueue_RT
  42   (T : in Ada.Real_Time.Time;
  43    D : Delay_Block_Access) return Boolean
  44 is
  45    use type Ada.Real_Time.Time;  -- for "=" operator
  46 begin
  47    if T <= Ada.Real_Time.Clock then
  48       D.Timed_Out := True;
  49       System.Task_Primitives.Operations.Yield;
  50       return False;
  51    end if;
  52
  53    System.Tasking.Initialization.Defer_Abort
  54      (System.Task_Primitives.Operations.Self);
  55    Time_Enqueue (Ada.Real_Time.Delays.To_Duration (T), D);
  56    return True;
  57 end System.Tasking.Async_Delays.Enqueue_RT;