1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--           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          --
6--                                                                          --
7--                                  B o d y                                 --
8--                                                                          --
9--          Copyright (C) 1992-2010, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNARL is free software; you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNARL was developed by the GNARL team at Florida State University.       --
28-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This is the VxWorks version of this package
33
34--  It is simpler than other versions because the Ada interrupt handling
35--  mechanisms are used for hardware interrupts rather than signals.
36
37package body System.Interrupt_Management is
38
39   use System.OS_Interface;
40   use type Interfaces.C.int;
41
42   -----------------------
43   -- Local Subprograms --
44   -----------------------
45
46   function State (Int : Interrupt_ID) return Character;
47   pragma Import (C, State, "__gnat_get_interrupt_state");
48   --  Get interrupt state. Defined in init.c The input argument is the
49   --  hardware interrupt number, and the result is one of the following:
50
51   Runtime : constant Character := 'r';
52   Default : constant Character := 's';
53   --    'n'   this interrupt not set by any Interrupt_State pragma
54   --    'u'   Interrupt_State pragma set state to User
55   --    'r'   Interrupt_State pragma set state to Runtime
56   --    's'   Interrupt_State pragma set state to System (use "default"
57   --           system handler)
58
59   ----------------
60   -- Initialize --
61   ----------------
62
63   Initialized : Boolean := False;
64   --  Set to True once Initialize is called, further calls have no effect
65
66   procedure Initialize is
67
68   begin
69      if Initialized then
70         return;
71      end if;
72
73      Initialized := True;
74
75      --  Change this if you want to use another signal for task abort.
76      --  SIGTERM might be a good one.
77
78      Abort_Task_Interrupt := SIGABRT;
79
80      --  Initialize hardware interrupt handling
81
82      pragma Assert (Reserve = (Interrupt_ID'Range => False));
83
84      --  Check all interrupts for state that requires keeping them reserved
85
86      for J in Interrupt_ID'Range loop
87         if State (J) = Default or else State (J) = Runtime then
88            Reserve (J) := True;
89         end if;
90      end loop;
91
92   end Initialize;
93
94end System.Interrupt_Management;
95