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1 149 jeremybenn
-- C954016.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that when a task that is called by a requeue is aborted, the
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--      original caller receives Tasking_Error and the requeuing task is
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--      unaffected.
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--
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-- TEST DESCRIPTION:
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--      The Intermediate task requeues a call from the Original_Caller to the
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--      Receiver.  While the Receiver is in the accept body for this
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--      rendezvous the Main aborts it.  Check that Tasking_Error is raised in
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--      the Original_Caller, that the Receiver does, indeed, get aborted and
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--      the Intermediate task is undisturbed.
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--      There are several delay loops in this test any one of which could
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--      cause it to hang which would constitute failure.
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--
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--      25 Nov 95   SAIC    Replaced shared global variable with protected
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--                          object for ACVC 2.0.1
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--
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--!
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with Report;
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with ImpDef;
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procedure C954016 is
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   TC_Original_Caller_Complete  : Boolean := false;
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   TC_Intermediate_Complete     : Boolean := false;
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   protected type Shared_Boolean (Initial_Value : Boolean := False) is
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      procedure Set_True;
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      procedure Set_False;
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      function  Value return Boolean;
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   private
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      Current_Value : Boolean := Initial_Value;
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   end Shared_Boolean;
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   protected body Shared_Boolean is
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      procedure Set_True is
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      begin
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         Current_Value := True;
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      end Set_True;
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      procedure Set_False is
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      begin
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         Current_Value := False;
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      end Set_False;
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      function Value return Boolean is
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      begin
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         return Current_Value;
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      end Value;
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   end Shared_Boolean;
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   TC_Receiver_in_Accept        : Shared_Boolean (False);
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   task Original_Caller is
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      entry Start;
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   end Original_Caller;
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   task Intermediate is
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      entry Input;
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      entry TC_Abort_Process_Complete;
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   end Intermediate;
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   task Receiver is
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      entry Input;
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      entry TC_Never_Called;
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   end Receiver;
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   task body Original_Caller is
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   begin
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      accept Start;    -- wait for the trigger from Main
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      Intermediate.Input;
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      Report.Failed ("Tasking_Error not raised in Original_Caller task");
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   exception
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      when tasking_error =>
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               TC_Original_Caller_Complete := true;     -- expected behavior
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      when others        =>
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               Report.Failed ("Unexpected Exception in Original_Caller task");
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   end Original_Caller;
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   task body Intermediate is
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   begin
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      accept Input do
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         -- Within this accept call another task
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         requeue Receiver.Input with abort;
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      end Input;
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      -- Wait for Main to ensure that the abort housekeeping is finished
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      accept TC_Abort_Process_Complete;
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      TC_Intermediate_Complete := true;
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   exception
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      when others =>
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                Report.Failed ("Unexpected exception in Intermediate task");
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   end Intermediate;
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   task body Receiver is
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   begin
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      accept Input do
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         TC_Receiver_in_Accept.Set_True;
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         -- Hang within the accept body to allow Main to abort this task
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         accept TC_Never_Called;
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      end Input;
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   exception
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      when others  =>
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            Report.Failed ("Unexpected Exception in Receiver Task");
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   end Receiver;
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begin
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   Report.Test ("C954016", "Requeue: abort the called task");
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   Original_Caller.Start;
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   -- Wait till the rendezvous with Receiver is started
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   while not TC_Receiver_in_Accept.Value loop
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      delay ImpDef.Minimum_Task_Switch;
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   end loop;
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   -- At this point the Receiver is guaranteed to be in its accept
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   --
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   abort Receiver;
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   -- Wait for the whole of the abort process to complete
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   while not ( Original_Caller'terminated and Receiver'terminated ) loop
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      delay ImpDef.Minimum_Task_Switch;
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   end loop;
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   -- Inform the Intermediate task that the process is complete to allow
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   -- it to continue to completion itself
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   Intermediate.TC_Abort_Process_Complete;
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   -- Wait for everything to settle before reporting the result
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   while not ( Intermediate'terminated ) loop
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      delay ImpDef.Minimum_Task_Switch;
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   end loop;
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   if not ( TC_Original_Caller_Complete and TC_Intermediate_Complete ) then
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      Report.Failed ("Proper paths not traversed");
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   end if;
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   Report.Result;
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end C954016;

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