New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45952 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 104 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                GNU ADA 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          --
+--                                                                          --
+--                                  B o d y                                 --
+--                                                                          --
+--                             $Revision: 1.5 $
+--                                                                          --
+--            Copyright (C) 1991-2001, Florida State University             --
+--                                                                          --
+-- 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- --
+-- 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.                                                      --
+--                                                                          --
+-- 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.                                      --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University. It is --
+-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
+-- State University (http://www.gnat.com).                                  --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is a SGI Pthread version of this package.
+
+--  PLEASE DO NOT add any dependences on other packages.
+--  This package is designed to work with or without tasking support.
+
+--  Make a careful study of all signals available under the OS,
+--  to see which need to be reserved, kept always unmasked,
+--  or kept always unmasked.
+--  Be on the lookout for special signals that
+--  may be used by the thread library.
+
+with Interfaces.C;
+--  used for int
+
+with System.OS_Interface;
+--  used for various Constants, Signal and types
+
+package body System.Interrupt_Management is
+
+   use System.OS_Interface;
+
+   type Interrupt_List is array (Interrupt_ID range <>) of Interrupt_ID;
+   Exception_Interrupts : constant Interrupt_List :=
+     (SIGTSTP, SIGILL, SIGTRAP, SIGEMT, SIGFPE, SIGBUS, SIGSTOP, SIGKILL,
+      SIGSEGV, SIGSYS, SIGXCPU, SIGXFSZ, SIGPROF, SIGPTINTR, SIGPTRESCHED,
+      SIGABRT, SIGPIPE);
+
+   ---------------------------
+   -- Initialize_Interrupts --
+   ---------------------------
+
+   --  Nothing needs to be done on this platform.
+
+   procedure Initialize_Interrupts is
+   begin
+      null;
+   end Initialize_Interrupts;
+
+   Unreserve_All_Interrupts : Interfaces.C.int;
+   pragma Import
+     (C, Unreserve_All_Interrupts, "__gl_unreserve_all_interrupts");
+
+   use type Interfaces.C.int;
+
+begin
+   Abort_Task_Interrupt := SIGABRT;
+   --  Change this if you want to use another signal for task abort.
+   --  SIGTERM might be a good one.
+
+   for I in Exception_Interrupts'Range loop
+      Keep_Unmasked (Exception_Interrupts (I)) := True;
+   end loop;
+
+   --  By keeping SIGINT unmasked, allow the user to do a Ctrl-C, but in the
+   --  same time, disable the ability of handling this signal via
+   --  Ada.Interrupts.
+   --  The pragma Unreserve_All_Interrupts let the user the ability to
+   --  change this behavior.
+
+   if Unreserve_All_Interrupts = 0 then
+      Keep_Unmasked (SIGINT) := True;
+   end if;
+
+   Keep_Unmasked (Abort_Task_Interrupt) := True;
+
+   Reserve := Keep_Unmasked or Keep_Masked;
+   Reserve (0) := True;
+end System.Interrupt_Management;