------------------------------------------------------------------------------
-- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- 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 --
-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- 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 2, or (at your option) any later ver- --
--- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- 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. 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- 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. --
-- Unlike the original design, System.Interrupt_Management can only be used
-- for tasking systems.
--- PLEASE DO NOT remove the Elaborate_Body pragma from this package.
--- Elaboration of this package should happen early, as most other
--- initializations depend on it. Forcing immediate elaboration of the body
--- also helps to enforce the design assumption that this is a second-level
--- package, just one level above System.OS_Interface with no
--- cross-dependencies.
-
-- PLEASE DO NOT put any subprogram declarations with arguments of type
-- Interrupt_ID into the visible part of this package. The type Interrupt_ID
-- is used to derive the type in Ada.Interrupts, and adding more operations
-- to that type would be illegal according to the Ada Reference Manual. This
--- is the reason why the signals sets are implemeneted using visible arrays
+-- is the reason why the signals sets are implemented using visible arrays
-- rather than functions.
with System.OS_Interface;
--- used for sigset_t
with Interfaces.C;
--- used for int
package System.Interrupt_Management is
-
- pragma Elaborate_Body;
+ pragma Preelaborate;
type Interrupt_Mask is limited private;
-- systems, but is always reserved when it is defined. If we have the
-- convention that ID zero is not used for any "real" signals, and SIGRARE
-- = 0 when SIGRARE is not one of the locally supported signals, we can
- -- write
-
+ -- write:
-- Reserved (SIGRARE) := True;
-
-- and the initialization code will be portable.
Abort_Task_Interrupt : Interrupt_ID;
-- example, it may be mapped to an exception used to implement task abort,
-- or used to implement time delays.
- procedure Initialize_Interrupts;
- -- On systems where there is no signal inheritance between tasks (e.g
- -- VxWorks, GNU/LinuxThreads), this procedure is used to initialize
- -- interrupts handling in each task. Otherwise this function should only
- -- be called by initialize in this package body.
+ procedure Initialize;
+ -- Initialize the various variables defined in this package. This procedure
+ -- must be called before accessing any object from this package, and can be
+ -- called multiple times.
private
type Interrupt_Mask is new System.OS_Interface.sigset_t;
- -- In some implementations Interrupt_Mask can be represented as a linked
- -- list.
+ -- In some implementations Interrupt_Mask is represented as a linked list
+
+ procedure Adjust_Context_For_Raise
+ (Signo : System.OS_Interface.Signal;
+ Ucontext : System.Address);
+ pragma Import
+ (C, Adjust_Context_For_Raise, "__gnat_adjust_context_for_raise");
+ -- Target specific hook performing adjustments to the signal's machine
+ -- context, to be called before an exception may be raised from a signal
+ -- handler. This service is provided by init.c, together with the
+ -- non-tasking signal handler.
end System.Interrupt_Management;
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