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

--                                                                          --

--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --

--                                                                          --

--            S Y S T E M . I N T E R R U P T _ M A N A G E M E N T .       --

--                             O P E R A T I O N S                          --

--                                                                          --

--                                  S p e c                                 --

--                                                                          --

--          Copyright (C) 1992-2005, Free Software Foundation, Inc.         --

--                                                                          --

-- GNARL 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 2,  or (at your option) any later ver- --

-- sion. GNARL 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.  See the GNU General Public License --

-- for  more details.  You should have  received  a copy of the GNU General --

-- Public License  distributed with GNARL; see file COPYING.  If not, write --

-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --

-- Boston, MA 02110-1301, USA.                                              --

--                                                                          --

-- As a special exception,  if other files  instantiate  generics from this --

-- unit, or you link  this unit with other files  to produce an executable, --

-- this  unit  does not  by itself cause  the resulting  executable  to  be --

-- covered  by the  GNU  General  Public  License.  This exception does not --

-- however invalidate  any other reasons why  the executable file  might be --

-- covered by the  GNU Public License.                                      --

--                                                                          --

-- GNARL was developed by the GNARL team at Florida State University.       --

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

--                                                                          --

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

package System.Interrupt_Management.Operations is

   procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID);

   pragma Inline (Thread_Block_Interrupt);

   --  Mask the calling thread for the interrupt

   procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID);

   pragma Inline (Thread_Unblock_Interrupt);

   --  Unmask the calling thread for the interrupt

   procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask);

   --  Set the interrupt mask of the calling thread

   procedure Set_Interrupt_Mask

     (Mask  : access Interrupt_Mask;

      OMask : access Interrupt_Mask);

   pragma Inline (Set_Interrupt_Mask);

   --  Set the interrupt mask of the calling thread while returning the

   --  previous Mask.

   procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask);

   pragma Inline (Get_Interrupt_Mask);

   --  Get the interrupt mask of the calling thread

   function Interrupt_Wait (Mask : access Interrupt_Mask) return Interrupt_ID;

   pragma Inline (Interrupt_Wait);

   --  Wait for the interrupts specified in Mask and return

   --  the interrupt received. Return 0 upon error.

   procedure Install_Default_Action (Interrupt : Interrupt_ID);

   pragma Inline (Install_Default_Action);

   --  Set the sigaction of the Interrupt to default (SIG_DFL)

   procedure Install_Ignore_Action (Interrupt : Interrupt_ID);

   pragma Inline (Install_Ignore_Action);

   --  Set the sigaction of the Interrupt to ignore (SIG_IGN)

   procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask);

   pragma Inline (Fill_Interrupt_Mask);

   --  Get a Interrupt_Mask with all the interrupt masked

   procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask);

   pragma Inline (Empty_Interrupt_Mask);

   --  Get a Interrupt_Mask with all the interrupt unmasked

   procedure Add_To_Interrupt_Mask

     (Mask      : access Interrupt_Mask;

      Interrupt : Interrupt_ID);

   pragma Inline (Add_To_Interrupt_Mask);

   --  Mask the given interrupt in the Interrupt_Mask

   procedure Delete_From_Interrupt_Mask

     (Mask      : access Interrupt_Mask;

      Interrupt : Interrupt_ID);

   pragma Inline (Delete_From_Interrupt_Mask);

   --  Unmask the given interrupt in the Interrupt_Mask

   function Is_Member

     (Mask      : access Interrupt_Mask;

      Interrupt : Interrupt_ID) return Boolean;

   pragma Inline (Is_Member);

   --  See if a given interrupt is masked in the Interrupt_Mask

   procedure Copy_Interrupt_Mask (X : out Interrupt_Mask; Y : Interrupt_Mask);

   pragma Inline (Copy_Interrupt_Mask);

   --  Assigment needed for limited private type Interrupt_Mask

   procedure Interrupt_Self_Process (Interrupt : Interrupt_ID);

   pragma Inline (Interrupt_Self_Process);

   --  Raise an Interrupt process-level

   procedure Setup_Interrupt_Mask;

   --  Mask Environment task for all signals

   --  This function should be called by the elaboration of System.Interrupt

   --  to set up proper signal masking in all tasks.

   --  The following objects serve as constants, but are initialized in the

   --  body to aid portability. These should be in System.Interrupt_Management

   --  but since Interrupt_Mask is private type we cannot have them declared

   --  there.

   --  Why not make these deferred constants that are initialized using

   --  function calls in the private part???

   Environment_Mask : aliased Interrupt_Mask;

   --  This mask represents the mask of Environment task when this package is

   --  being elaborated, except the signals being forced to be unmasked by RTS

   --  (items in Keep_Unmasked)

   All_Tasks_Mask : aliased Interrupt_Mask;

   --  This is the mask of all tasks created in RTS. Only one task in RTS

   --  is responsible for masking/unmasking signals (see s-interr.adb).

end System.Interrupt_Management.Operations;