gcc/ada/a-sytaco.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --         A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L          --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  21 --                                                                          --
  22 -- As a special exception under Section 7 of GPL version 3, you are granted --
  23 -- additional permissions described in the GCC Runtime Library Exception,   --
  24 -- version 3.1, as published by the Free Software Foundation.               --
  25 --                                                                          --
  26 -- You should have received a copy of the GNU General Public License and    --
  27 -- a copy of the GCC Runtime Library Exception along with this program;     --
  28 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  29 -- <http://www.gnu.org/licenses/>.                                          --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with System.Task_Primitives;
  37
  38 with Ada.Finalization;
  39
  40 package Ada.Synchronous_Task_Control is
  41    pragma Preelaborate_05;
  42    --  In accordance with Ada 2005 AI-362
  43
  44    type Suspension_Object is limited private;
  45
  46    procedure Set_True (S : in out Suspension_Object);
  47
  48    procedure Set_False (S : in out Suspension_Object);
  49
  50    function Current_State (S : Suspension_Object) return Boolean;
  51
  52    procedure Suspend_Until_True (S : in out Suspension_Object);
  53
  54 private
  55
  56    procedure Initialize (S : in out Suspension_Object);
  57    --  Initialization for Suspension_Object
  58
  59    procedure Finalize (S : in out Suspension_Object);
  60    --  Finalization for Suspension_Object
  61
  62    type Suspension_Object is
  63      new Ada.Finalization.Limited_Controlled with
  64    record
  65       SO : System.Task_Primitives.Suspension_Object;
  66       --  Use low-level suspension objects so that the synchronization
  67       --  functionality provided by this object can be achieved using
  68       --  efficient operating system primitives.
  69    end record;
  70
  71    pragma Inline (Set_True);
  72    pragma Inline (Set_False);
  73    pragma Inline (Current_State);
  74    pragma Inline (Suspend_Until_True);
  75    pragma Inline (Initialize);
  76    pragma Inline (Finalize);
  77
  78 end Ada.Synchronous_Task_Control;