-- C974009.A -- -- Grant of Unlimited Rights -- -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained -- unlimited rights in the software and documentation contained herein. -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making -- this public release, the Government intends to confer upon all -- recipients unlimited rights equal to those held by the Government. -- These rights include rights to use, duplicate, release or disclose the -- released technical data and computer software in whole or in part, in -- any manner and for any purpose whatsoever, and to have or permit others -- to do so. -- -- DISCLAIMER -- -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A -- PARTICULAR PURPOSE OF SAID MATERIAL. --* -- -- OBJECTIVE: -- Check that the abortable part of an asynchronous select statement -- is not started if the triggering statement is a task entry call, -- the entry call is not queued and the entry call completes by -- propagating an exception. -- -- Check that the exception is properly propagated to the asynchronous -- select statement and thus the sequence of statements of the triggering -- alternative is not executed after the abortable part is left. -- -- Check that the exception propagated by the entry call is re-raised -- immediately following the asynchronous select. -- -- TEST DESCRIPTION: -- -- Use a small subset of the base Automated teller machine simulation -- which is shown in greater detail in other tests of this series. -- Declare a main procedure containing an asynchronous select with a task -- entry call as triggering statement. Force the task to be waiting at -- the accept statement so that the call is not queued and the rendezvous -- is executed immediately. Simulate an unexpected exception in the -- rendezvous. Use stripped down versions of called procedures to check -- the correct path in the test. -- -- -- CHANGE HISTORY: -- 06 Dec 94 SAIC ACVC 2.0 -- --! package C974009_0 is -- Automated teller machine abstraction. Propagated_From_Task : exception; Transaction_Canceled : exception; type Key_Enum is (None, Cancel, Deposit, Withdraw); type Card_Number_Type is private; type Card_PIN_Type is private; type ATM_Card_Type is private; task type ATM_Keyboard_Task is entry Cancel_Pressed; end ATM_Keyboard_Task; procedure Validate_Card (Card : in ATM_Card_Type); procedure Perform_Transaction (Card : in ATM_Card_Type); private type Card_Number_Type is range 1 .. 9999; type Card_PIN_Type is range 100 .. 999; type ATM_Card_Type is record Number : Card_Number_Type; PIN : Card_PIN_Type; end record; end C974009_0; --==================================================================-- with Report; package body C974009_0 is -- One of these gets created as "Keyboard" for each transaction -- task body ATM_Keyboard_Task is Key_Pressed : Key_Enum := None; begin accept Cancel_Pressed do -- queued entry call. null; --:::: stub, user code for cancel -- Now simulate an unexpected exception arising in the -- user code raise Propagated_From_Task; -- Propagate an exception. end Cancel_Pressed; Report.Failed ("Exception not propagated in ATM_Keyboard_Task"); exception when Propagated_From_Task => null; -- This is the expected test behavior when others => Report.Failed ("Unexpected Exception in ATM_Keyboard_Task"); end ATM_Keyboard_Task; procedure Validate_Card (Card : in ATM_Card_Type) is begin Report.Failed ("Abortable part was executed"); end Validate_Card; procedure Perform_Transaction (Card : in ATM_Card_Type) is begin Report.Failed ("Exception not re-raised immediately following " & "asynchronous select"); end Perform_Transaction; end C974009_0; --==================================================================-- with Report; with ImpDef; with C974009_0; -- Automated teller machine abstraction. use C974009_0; procedure C974009 is Card_Data : ATM_Card_Type; begin -- Main program. Report.Test ("C974009", "Asynchronous Select: Trigger is a call to a " & "task entry, is not queued and is completed " & "first by an exception"); begin declare -- Create the task for this transaction Keyboard : C974009_0.ATM_Keyboard_Task; begin -- Ensure task is waiting a the accept so the call is not queued -- This is the time required to activate another task and allow it -- to run to its first accept statement -- delay ImpDef.Switch_To_New_Task; -- -- -- Asynchronous select is tested here -- -- -- select Keyboard.Cancel_Pressed; raise Transaction_Canceled; -- Should not be executed. then abort Validate_Card (Card_Data); -- Keyboard.Cancel_Pressed is accepted -- and propagates an exception before -- this call is executed end select; -- The propagated exception is re-raised here. Perform_Transaction(Card_Data); -- Should not be reached. exception when Transaction_Canceled => Report.Failed ("Triggering alternative sequence of statements " & "executed"); when Propagated_From_Task => null; -- This is the expected test path when others => Report.Failed ("Wrong exception raised"); end; exception when others => Report.Failed ("Unexpected exception raised"); end; Report.Result; end C974009;