1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                   A D A . E X C E P T I O N S . P O L L                  --
6--                (version supporting asynchronous abort test)              --
7--                                                                          --
8--                                  B o d y                                 --
9--                                                                          --
10--          Copyright (C) 1992-2013, Free Software Foundation, Inc.         --
11--                                                                          --
12-- GNARL is free software; you can  redistribute it  and/or modify it under --
13-- terms of the  GNU General Public License as published  by the Free Soft- --
14-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
15-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
16-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
17-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
18--                                                                          --
19-- As a special exception under Section 7 of GPL version 3, you are granted --
20-- additional permissions described in the GCC Runtime Library Exception,   --
21-- version 3.1, as published by the Free Software Foundation.               --
22--                                                                          --
23-- You should have received a copy of the GNU General Public License and    --
24-- a copy of the GCC Runtime Library Exception along with this program;     --
25-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
26-- <http://www.gnu.org/licenses/>.                                          --
27--                                                                          --
28-- GNARL was developed by the GNARL team at Florida State University.       --
29-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
30--                                                                          --
31------------------------------------------------------------------------------
32
33--  This version is for targets that do not support per-thread asynchronous
34--  signals. On such targets, we require compilation with the -gnatP switch
35--  that activates periodic polling. Then in the body of the polling routine
36--  we test for asynchronous abort.
37
38--  Windows, HPUX 10 and VMS currently use this file
39
40pragma Warnings (Off);
41--  Allow withing of non-Preelaborated units in Ada 2005 mode where this
42--  package will be categorized as Preelaborate. See AI-362 for details.
43--  It is safe in the context of the run-time to violate the rules.
44
45with System.Soft_Links;
46
47pragma Warnings (On);
48
49separate (Ada.Exceptions)
50
51----------
52-- Poll --
53----------
54
55procedure Poll is
56begin
57   --  Test for asynchronous abort on each poll
58
59   if System.Soft_Links.Check_Abort_Status.all /= 0 then
60      raise Standard'Abort_Signal;
61   end if;
62end Poll;
63