File : a-excpol-abort.adb
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) 1992-2014, 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 -- --
20 -- --
21 -- --
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 and HPUX 10 currently use this file
39
40 pragma 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
45 with System.Soft_Links;
46
47 pragma Warnings (On);
48
49 separate (Ada.Exceptions)
50
51 ----------
52 -- Poll --
53 ----------
54
55 procedure Poll is
56 begin
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;
62 end Poll;