| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- A D A . E X C E P T I O N S . P O L L -- |
| -- (version supporting asynchronous abort test and time slicing) -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- $Revision: 1.4 $ |
| -- -- |
| -- Copyright (C) 1992-2000, Free Software Foundation, Inc. -- |
| -- -- |
| -- 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 version is for targets that do not support per-thread asynchronous |
| -- signals or that do not handle async timers properly. On such targets, we |
| -- require compilation with the -gnatP switch that activates periodic polling. |
| -- Then in the body of the polling routine we test for asynchronous abort and |
| -- yield periodically. |
| |
| -- HP-UX and SCO currently use this file |
| |
| with System.Soft_Links; |
| -- used for Check_Abort_Status |
| |
| separate (Ada.Exceptions) |
| |
| ---------- |
| -- Poll -- |
| ---------- |
| |
| procedure Poll is |
| begin |
| if Counter = 10000 then |
| Counter := 0; |
| delay 0.0; |
| else |
| Counter := Counter + 1; |
| end if; |
| |
| -- Test for asynchronous abort on each poll |
| |
| if System.Soft_Links.Check_Abort_Status.all /= 0 then |
| raise Standard'Abort_Signal; |
| end if; |
| end Poll; |
