File : s-intman-vxworks.adb
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 -- --
19 -- --
20 -- --
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
37 package 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
94 end System.Interrupt_Management;