annotate gcc/ada/libgnat/a-excpol__abort.adb @ 131:84e7813d76e9

gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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4 -- --
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5 -- A D A . E X C E P T I O N S . P O L L --
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6 -- (version supporting asynchronous abort test) --
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7 -- --
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8 -- B o d y --
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9 -- --
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10 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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11 -- --
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12 -- GNARL is free software; you can redistribute it and/or modify it under --
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13 -- terms of the GNU General Public License as published by the Free Soft- --
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14 -- ware Foundation; either version 3, or (at your option) any later ver- --
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15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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17 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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18 -- --
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19 -- As a special exception under Section 7 of GPL version 3, you are granted --
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20 -- additional permissions described in the GCC Runtime Library Exception, --
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21 -- version 3.1, as published by the Free Software Foundation. --
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22 -- --
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23 -- You should have received a copy of the GNU General Public License and --
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24 -- a copy of the GCC Runtime Library Exception along with this program; --
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25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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26 -- <http://www.gnu.org/licenses/>. --
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27 -- --
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28 -- GNARL was developed by the GNARL team at Florida State University. --
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29 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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30 -- --
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31 ------------------------------------------------------------------------------
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32
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33 -- This version is for targets that do not support per-thread asynchronous
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34 -- signals. On such targets, we require compilation with the -gnatP switch
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35 -- that activates periodic polling. Then in the body of the polling routine
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36 -- we test for asynchronous abort.
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37
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38 -- Windows and HPUX 10 currently use this file
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39
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40 pragma Warnings (Off);
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41 -- Allow withing of non-Preelaborated units in Ada 2005 mode where this
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42 -- package will be categorized as Preelaborate. See AI-362 for details.
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43 -- It is safe in the context of the run-time to violate the rules.
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44
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45 with System.Soft_Links;
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46
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47 pragma Warnings (On);
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48
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49 separate (Ada.Exceptions)
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50
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51 ----------
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52 -- Poll --
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53 ----------
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54
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55 procedure Poll is
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56 begin
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57 -- Test for asynchronous abort on each poll
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58
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59 if System.Soft_Links.Check_Abort_Status.all /= 0 then
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60 raise Standard'Abort_Signal;
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61 end if;
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62 end Poll;