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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- SYSTEM.INTERRUPT_MANAGEMENT.OPERATIONS --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1992-2009, 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 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. --
+-- --
+------------------------------------------------------------------------------
+
+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);
+ -- Assignment 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;