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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--              G N A T . E X C E P T I O N _ A C T I O N S                 --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 2002-2011, 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/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

with Ada.Unchecked_Conversion;

with System;

with System.Soft_Links;       use System.Soft_Links;

with System.Standard_Library; use System.Standard_Library;

with System.Exception_Table;  use System.Exception_Table;

package body GNAT.Exception_Actions is

   Global_Action : Exception_Action;

   pragma Import (C, Global_Action, "__gnat_exception_actions_global_action");

   --  Imported from Ada.Exceptions. Any change in the external name needs to

   --  be coordinated with a-except.adb

   Raise_Hook_Initialized : Boolean;

   pragma Import

     (Ada, Raise_Hook_Initialized, "__gnat_exception_actions_initialized");

   function To_Raise_Action is new Ada.Unchecked_Conversion

     (Exception_Action, Raise_Action);

   --  ??? Would be nice to have this in System.Standard_Library

   function To_Data is new Ada.Unchecked_Conversion

     (Exception_Id, Exception_Data_Ptr);

   function To_Id is new Ada.Unchecked_Conversion

     (Exception_Data_Ptr, Exception_Id);

   ----------------------------

   -- Register_Global_Action --

   ----------------------------

   procedure Register_Global_Action (Action : Exception_Action) is

   begin

      Lock_Task.all;

      Global_Action := Action;

      Unlock_Task.all;

   end Register_Global_Action;

   ------------------------

   -- Register_Id_Action --

   ------------------------

   procedure Register_Id_Action

     (Id     : Exception_Id;

      Action : Exception_Action)

   is

   begin

      if Id = Null_Id then

         raise Program_Error;

      end if;

      Lock_Task.all;

      To_Data (Id).Raise_Hook := To_Raise_Action (Action);

      Raise_Hook_Initialized := True;

      Unlock_Task.all;

   end Register_Id_Action;

   ---------------

   -- Core_Dump --

   ---------------

   procedure Core_Dump (Occurrence : Exception_Occurrence) is separate;

   ----------------

   -- Name_To_Id --

   ----------------

   function Name_To_Id (Name : String) return Exception_Id is

   begin

      return To_Id (Internal_Exception (Name, Create_If_Not_Exist => False));

   end Name_To_Id;

   ---------------------------------

   -- Registered_Exceptions_Count --

   ---------------------------------

   function Registered_Exceptions_Count return Natural renames

     System.Exception_Table.Registered_Exceptions_Count;

   -------------------------------

   -- Get_Registered_Exceptions --

   -------------------------------

   --  This subprogram isn't an iterator to avoid concurrency problems,

   --  since the exceptions are registered dynamically. Since we have to lock

   --  the runtime while computing this array, this means that any callback in

   --  an active iterator would be unable to access the runtime.

   procedure Get_Registered_Exceptions

     (List : out Exception_Id_Array;

      Last : out Integer)

   is

      Ids : Exception_Data_Array (List'Range);

   begin

      Get_Registered_Exceptions (Ids, Last);

      for L in List'First .. Last loop

         List (L) := To_Id (Ids (L));

      end loop;

   end Get_Registered_Exceptions;

end GNAT.Exception_Actions;