gcc/ada/s-tadeca.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --               SYSTEM.TASKING.ASYNC_DELAYS.ENQUEUE_CALENDAR               --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --          Copyright (C) 1998-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Ada.Calendar.Delays;
  35 with System.Task_Primitives.Operations;
  36 with System.Tasking.Initialization;
  37
  38 function System.Tasking.Async_Delays.Enqueue_Calendar
  39   (T    : Ada.Calendar.Time;
  40    D    : Delay_Block_Access)
  41    return Boolean
  42 is
  43    use type Ada.Calendar.Time;
  44 begin
  45    if T <= Ada.Calendar.Clock then
  46       D.Timed_Out := True;
  47       System.Task_Primitives.Operations.Yield;
  48       return False;
  49    end if;
  50
  51    System.Tasking.Initialization.Defer_Abort
  52      (System.Task_Primitives.Operations.Self);
  53    Time_Enqueue (Ada.Calendar.Delays.To_Duration (T), D);
  54    return True;
  55 end System.Tasking.Async_Delays.Enqueue_Calendar;