polyorb_hi-suspenders.adb 3.93 KB
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------------------------------------------------------------------------------
--                                                                          --
--                          PolyORB HI COMPONENTS                           --
--                                                                          --
--                P O L Y O R B _ H I . S U S P E N D E R S                 --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
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--    Copyright (C) 2007-2009 Telecom ParisTech, 2010-2015 ESA & ISAE.      --
--                                                                          --
-- PolyORB-HI is free software; you can redistribute it and/or modify under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion. PolyORB-HI is distributed in the hope that it will be useful, but  --
-- WITHOUT ANY WARRANTY; without even the implied warranty of               --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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--              PolyORB-HI/Ada is maintained by the TASTE project           --
--                      (taste-users@lists.tuxfamily.org)                   --
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--                                                                          --
------------------------------------------------------------------------------

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with Ada.Synchronous_Task_Control;    use Ada.Synchronous_Task_Control;
pragma Elaborate_All (Ada.Synchronous_Task_Control);
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package body PolyORB_HI.Suspenders is
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   pragma SPARK_Mode (Off);
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   use Ada.Real_Time;
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   Task_Suspension_Objects : array (Entity_Type'Range) of Suspension_Object;
   --  This array is used so that each task waits on its corresponding
   --  suspension object until the transport layer initialization is
   --  complete. We are obliged to do so since Ravenscar forbids that
   --  more than one task wait on a protected object entry.
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   --  The_Suspender : Suspension_Object;
   --  XXX: we cannot use the suspension object because of
   --  gnatforleon 2.0w5

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   ----------------
   -- Block_Task --
   ----------------

   procedure Block_Task (Entity : Entity_Type) is
   begin
      Suspend_Until_True (Task_Suspension_Objects (Entity));
   end Block_Task;

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   ---------------------
   -- Suspend_Forever --
   ---------------------

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   procedure Suspend_Forever
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--     with SPARK_Mode => Off
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     --  XXX: delay until not supported in GNATProve GPL2014
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   is
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   begin
      --  Suspend_Until_True (The_Suspender);

      --  XXX: we cannot use the suspension object because of
      --  gnatforleon 2.0w5
      delay until Time_Last;
   end Suspend_Forever;

   -----------------------
   -- Unblock_All_Tasks --
   -----------------------

   procedure Unblock_All_Tasks is
   begin
      System_Startup_Time :=
        Ada.Real_Time.Clock + Ada.Real_Time.Milliseconds (1_000);

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      for Obj of Task_Suspension_Objects loop
         Set_True (Obj);
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      end loop;
   end Unblock_All_Tasks;

end PolyORB_HI.Suspenders;