-- C974008.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, and -- the entry call is not queued. -- -- Check that the sequence of statements of the triggering alternative -- is executed after the abortable part is left. -- -- TEST DESCRIPTION: -- Declare a main procedure containing an asynchronous select with a task -- entry call as triggering statement. Ensure that the task is waiting -- at the accept statement so the rendezvous is executed immediately (the -- entry call is not queued). -- -- -- CHANGE HISTORY: -- 06 Dec 94 SAIC ACVC 2.0 -- --! package C974008_0 is -- Automated teller machine abstraction. -- Flags for testing purposes: Triggering_Statement_Completed : Boolean := False; Count : Integer := 1234; -- Global to defeat -- optimization. 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; Transaction_Canceled : exception; task type ATM_Keyboard_Task is entry Cancel_Pressed; end ATM_Keyboard_Task; procedure Read_Card (Card : in out 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 C974008_0; --==================================================================-- with Report; package body C974008_0 is procedure Listen_For_Input (Key : out Key_Enum) is begin -- Simulate the situation where the user presses the cancel key -- before the card is validated -- press the cancel key immediately Key := Cancel; end Listen_For_Input; -- One of these gets created as "Keyboard" for each transaction -- task body ATM_Keyboard_Task is Key_Pressed : Key_Enum := None; begin -- NOTE: Normal usage for this routine would be the loop with -- the select statement included. This particular test -- requires that the task be waiting at the accept -- for the call. To ensure that this is the case the -- extraneous commands are commented out (we leave them -- in this form to show the reader the surrounds to the -- fragment of code remaining) -- loop Listen_For_Input (Key_Pressed); -- select -- when (Key_Pressed = Cancel) => -- Guard is now accept Cancel_Pressed do -- true, so accept Triggering_Statement_Completed := True; -- queued entry end Cancel_Pressed; -- call. -- User has cancelled the transaction so we exit the -- loop and allow the task to terminate -- exit; -- else -- Key_Pressed := None; -- end select; -- end loop; exception when others => Report.Failed ("Unexpected Exception in ATM_Keyboard_Task"); end ATM_Keyboard_Task; procedure Read_Card (Card : in out ATM_Card_Type) is begin Card.Number := 9999; Card.PIN := 111; end Read_Card; procedure Perform_Transaction (Card : in ATM_Card_Type) is begin Report.Failed ("Triggering alternative sequence of statements " & "not executed"); if not Triggering_Statement_Completed then Report.Failed ("Triggering statement did not complete"); end if; end Perform_Transaction; end C974008_0; --==================================================================-- with Report; with ImpDef; with C974008_0; -- Automated teller machine abstraction. use C974008_0; procedure C974008 is Card_Data : ATM_Card_Type; begin -- Main program. Report.Test ("C974008", "Asynchronous Select: Trigger is a call to a " & "waiting task entry and completes immediately"); Read_Card (Card_Data); declare -- Create the task for this transaction Keyboard : C974008_0.ATM_Keyboard_Task; begin -- Ensure task is waiting at the accept -- 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; -- Entry call is executed immediately raise Transaction_Canceled; -- This is executed after Validate_Card -- is aborted. then abort -- In other similar tests Validate_Card is called here. In this -- test we just check to see if the abortable part is called at -- all. Since the triggering call is not queued the abortable -- part should not be started -- Report.Failed ("Abortable part started"); end select; Perform_Transaction (Card_Data); -- Should not be reached. exception when Transaction_Canceled => if not Triggering_Statement_Completed then Report.Failed ("Triggering alternative sequence of statements " & "executed but triggering statement not complete"); end if; end; Report.Result; end C974008;