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) 1992-2009, 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 a OpenVMS/Alpha version of this package
33
34package body System.Interrupt_Management is
35
36   ----------------
37   -- Initialize --
38   ----------------
39
40   Initialized : Boolean := False;
41
42   procedure Initialize is
43      use System.OS_Interface;
44      Status : Cond_Value_Type;
45
46   begin
47      if Initialized then
48         return;
49      end if;
50
51      Initialized := True;
52      Abort_Task_Interrupt := Interrupt_ID_0;
53      --  Unused
54
55      Reserve := Reserve or Keep_Unmasked or Keep_Masked;
56      Reserve (Interrupt_ID_0) := True;
57
58      Sys_Crembx
59        (Status => Status,
60         Prmflg => 0,
61         Chan   => Rcv_Interrupt_Chan,
62         Maxmsg => Interrupt_ID'Size,
63         Bufquo => Interrupt_Bufquo,
64         Lognam => "GNAT_Interrupt_Mailbox",
65         Flags  => CMB_M_READONLY);
66      pragma Assert ((Status and 1) = 1);
67
68      Sys_Assign
69        (Status => Status,
70         Devnam => "GNAT_Interrupt_Mailbox",
71         Chan   => Snd_Interrupt_Chan,
72         Flags  => AGN_M_WRITEONLY);
73      pragma Assert ((Status and 1) = 1);
74   end Initialize;
75
76end System.Interrupt_Management;
77