File : s-tassta.ads


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--                                                                          --
--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
--                                                                          --
--                 S Y S T E M . T A S K I N G . S T A G E S                --
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--                             $Revision: 1.32 $                            --
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--          Copyright (C) 1992-1998, Free Software Foundation, Inc.         --
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--  Note: the compiler generates direct calls to this interface, via Rtsfind.
--  Any changes to this interface may require corresponding compiler changes.

with System.Task_Info;
--  used for Task_Info_Type

with System.Parameters;
--  used for Size_Type

package System.Tasking.Stages is
   --  This interface is described in the document
   --  Gnu Ada Runtime Library Interface (GNARLI).

   pragma Elaborate_Body (System.Tasking.Stages);

   function Current_Master return Master_Level;

   procedure Enter_Master;

   procedure Complete_Master;

   procedure Create_Task
     (Priority      : Integer;
      Size          : System.Parameters.Size_Type;
      Task_Info     : System.Task_Info.Task_Info_Type;
      Num_Entries   : Task_Entry_Index;
      Master        : Master_Level;
      State         : Task_Procedure_Access;
      Discriminants : System.Address;
      Elaborated    : Access_Boolean;
      Chain         : in out Activation_Chain;
      Task_Image    : System.Task_Info.Task_Image_Type;
      Created_Task  : out Task_ID);

   procedure Activate_Tasks (Chain_Access : Activation_Chain_Access);

   procedure Expunge_Unactivated_Tasks (Chain : in out Activation_Chain);

   procedure Complete_Activation;

   procedure Complete_Task;
   --  ????
   --  Consider eliminating this from the compiler interface, since
   --  we can embed the necessary call in the task wrapper.

   procedure Free_Task (T : Task_ID);
   --  Compiler interface only.
   --  Recover all runtime system storage associated with the task T,
   --  but only if T has terminated. Do nothing in the other case.
   --  It is called from Unchecked_Deallocation, for objects that
   --  are or contain tasks.

   function Terminated (T : Task_ID) return Boolean;

   -------------------------------
   -- RTS Internal Declarations --
   -------------------------------

   --  These declarations are not part of the GNARLI.

   procedure Finalize_Global_Tasks;
   --  to be called by the binder

end System.Tasking.Stages;