a-excpol-interix.adb   [plain text]


------------------------------------------------------------------------------
--                                                                          --
--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
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--                   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)      --
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------------------------------------------------------------------------------

--  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;