------------------------------------------------------------------------------
--                                                                          --
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
--                                                                          --
--            S Y S T E M . S T A C K _ U S A G E . T A S K I N G           --
--                                                                          --
--                                  S p e c                                 --
--                                                                          --
--           Copyright (C) 2009-2020, Free Software Foundation, Inc.        --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it 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.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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/>.                                          --
--                                                                          --
-- GNARL was developed by the GNARL team at Florida State University.       --
-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
--                                                                          --
------------------------------------------------------------------------------

--  This package provides exported subprograms to be called at debug time to
--  measure stack usage at run-time.

--  Note: this package must be a child package of System.Stack_Usage to have
--  visibility over its private part; it is however part of GNARL because it
--  needs to access tasking features via System.Tasking.Debug and
--  System.Task_Primitives.Operations;

package System.Stack_Usage.Tasking is

   procedure Report_All_Tasks;
   --  Print the current stack usage of all tasks on stderr. Exported to be
   --  called also in debug mode.

   pragma Export
     (C,
      Report_All_Tasks,
      "__gnat_tasks_stack_usage_report_all_tasks");

   procedure Report_Current_Task;
   --  Print the stack usage of current task on stderr. Exported to be called
   --  also in debug mode.

   pragma Export
     (C,
      Report_Current_Task,
      "__gnat_tasks_stack_usage_report_current_task");

   subtype Stack_Usage_Result is System.Stack_Usage.Task_Result;
   --  This type is a descriptor for task stack usage result

   type Stack_Usage_Result_Array is
     array (Positive range <>) of Stack_Usage_Result;

   function Get_Current_Task_Usage return Stack_Usage_Result;
   --  Return the current stack usage for the invoking task

   function Get_All_Tasks_Usage return Stack_Usage_Result_Array;
   --  Return an array containing the stack usage results for all tasks

   procedure Print (Obj : Stack_Usage_Result);
   --  Print Obj on stderr

end System.Stack_Usage.Tasking;
