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