-- C974005.A
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-- C974005.A
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--
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--
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-- Grant of Unlimited Rights
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-- Grant of Unlimited Rights
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--
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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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-- 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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-- 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 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- any manner and for any purpose whatsoever, and to have or permit others
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-- to do so.
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-- to do so.
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--
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--
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-- DISCLAIMER
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-- DISCLAIMER
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--
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--
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-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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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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-- 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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-- 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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-- 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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-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--*
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--
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--
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-- OBJECTIVE:
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-- OBJECTIVE:
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-- Check that Tasking_Error is raised at the point of an entry call
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-- Check that Tasking_Error is raised at the point of an entry call
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-- which is the triggering statement of an asynchronous select, if
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-- which is the triggering statement of an asynchronous select, if
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-- the entry call is queued, but the task containing the entry completes
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-- the entry call is queued, but the task containing the entry completes
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-- before it can be accepted or canceled.
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-- before it can be accepted or canceled.
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--
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--
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-- Check that the abortable part is aborted if it does not complete
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-- Check that the abortable part is aborted if it does not complete
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-- before the triggering statement completes.
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-- before the triggering statement completes.
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--
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--
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-- Check that the sequence of statements of the triggering alternative
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-- Check that the sequence of statements of the triggering alternative
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-- is not executed.
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-- is not executed.
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--
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--
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-- TEST DESCRIPTION:
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-- TEST DESCRIPTION:
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-- Declare a main procedure containing an asynchronous select with a task
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-- Declare a main procedure containing an asynchronous select with a task
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-- entry call as triggering statement. Force the entry call to be
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-- entry call as triggering statement. Force the entry call to be
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-- queued by having the task call a procedure, prior to the corresponding
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-- queued by having the task call a procedure, prior to the corresponding
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-- accept statement, which simulates a routine waiting for user input
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-- accept statement, which simulates a routine waiting for user input
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-- (with a delay).
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-- (with a delay).
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--
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--
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-- Simulate a time-consuming routine in the abortable part by calling a
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-- Simulate a time-consuming routine in the abortable part by calling a
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-- procedure containing an infinite loop. Meanwhile, simulate input by
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-- procedure containing an infinite loop. Meanwhile, simulate input by
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-- the user (the delay expires) which is NOT the input expected by the
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-- the user (the delay expires) which is NOT the input expected by the
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-- guard on the accept statement. The entry remains closed, and the
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-- guard on the accept statement. The entry remains closed, and the
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-- task completes its execution. Since the entry was not accepted before
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-- task completes its execution. Since the entry was not accepted before
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-- its task completed, Tasking_Error is raised at the point of the entry
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-- its task completed, Tasking_Error is raised at the point of the entry
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-- call.
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-- call.
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--
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--
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--
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--
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-- CHANGE HISTORY:
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-- CHANGE HISTORY:
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-- 06 Dec 94 SAIC ACVC 2.0
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-- 06 Dec 94 SAIC ACVC 2.0
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--
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--
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--!
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--!
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package C974005_0 is -- Automated teller machine abstraction.
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package C974005_0 is -- Automated teller machine abstraction.
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-- Flags for testing purposes:
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-- Flags for testing purposes:
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Count : Integer := 1234;
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Count : Integer := 1234;
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type Key_Enum is (None, Cancel, Deposit, Withdraw);
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type Key_Enum is (None, Cancel, Deposit, Withdraw);
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type Card_Number_Type is private;
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type Card_Number_Type is private;
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type Card_PIN_Type is private;
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type Card_PIN_Type is private;
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type ATM_Card_Type is private;
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type ATM_Card_Type is private;
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Transaction_Canceled : exception;
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Transaction_Canceled : exception;
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task type ATM_Keyboard_Task is
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task type ATM_Keyboard_Task is
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entry Cancel_Pressed;
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entry Cancel_Pressed;
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end ATM_Keyboard_Task;
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end ATM_Keyboard_Task;
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procedure Read_Card (Card : in out ATM_Card_Type);
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procedure Read_Card (Card : in out ATM_Card_Type);
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procedure Validate_Card (Card : in ATM_Card_Type);
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procedure Validate_Card (Card : in ATM_Card_Type);
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procedure Perform_Transaction (Card : in ATM_Card_Type);
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procedure Perform_Transaction (Card : in ATM_Card_Type);
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private
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private
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type Card_Number_Type is range 1 .. 9999;
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type Card_Number_Type is range 1 .. 9999;
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type Card_PIN_Type is range 100 .. 999;
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type Card_PIN_Type is range 100 .. 999;
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type ATM_Card_Type is record
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type ATM_Card_Type is record
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Number : Card_Number_Type;
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Number : Card_Number_Type;
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PIN : Card_PIN_Type;
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PIN : Card_PIN_Type;
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end record;
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end record;
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end C974005_0;
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end C974005_0;
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--==================================================================--
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--==================================================================--
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with Report;
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with Report;
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with ImpDef;
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with ImpDef;
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package body C974005_0 is
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package body C974005_0 is
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procedure Listen_For_Input (Key : out Key_Enum) is
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procedure Listen_For_Input (Key : out Key_Enum) is
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begin
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begin
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-- Simulate the situation where a user waits a bit for the card to
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-- Simulate the situation where a user waits a bit for the card to
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-- be validated, then presses a transaction key (NOT Cancel).
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-- be validated, then presses a transaction key (NOT Cancel).
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-- Delay long enough to force queuing of Keyboard.Cancel_Pressed.
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-- Delay long enough to force queuing of Keyboard.Cancel_Pressed.
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delay ImpDef.Clear_Ready_Queue;
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delay ImpDef.Clear_Ready_Queue;
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if Report.Equal (3, 3) then -- Always true.
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if Report.Equal (3, 3) then -- Always true.
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Key := Deposit; -- Cancel is NOT pressed.
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Key := Deposit; -- Cancel is NOT pressed.
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end if;
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end if;
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end Listen_For_Input;
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end Listen_For_Input;
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task body ATM_Keyboard_Task is
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task body ATM_Keyboard_Task is
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Key_Pressed : Key_Enum := None;
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Key_Pressed : Key_Enum := None;
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begin
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begin
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-- Note: no loop. If the user does not press Cancel, the task completes.
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-- Note: no loop. If the user does not press Cancel, the task completes.
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-- In this model of the keyboard monitor, the user only gets one chance
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-- In this model of the keyboard monitor, the user only gets one chance
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-- to cancel the card validation.
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-- to cancel the card validation.
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-- Force entry
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-- Force entry
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Listen_For_Input (Key_Pressed); -- calls to be
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Listen_For_Input (Key_Pressed); -- calls to be
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-- queued, but do
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-- queued, but do
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-- NOT set guard
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-- NOT set guard
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-- to true.
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-- to true.
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select
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select
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when (Key_Pressed = Cancel) => -- Guard is false,
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when (Key_Pressed = Cancel) => -- Guard is false,
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accept Cancel_Pressed do -- so entry call
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accept Cancel_Pressed do -- so entry call
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Report.Failed ("Accept statement executed"); -- remains queued.
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Report.Failed ("Accept statement executed"); -- remains queued.
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end Cancel_Pressed;
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end Cancel_Pressed;
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else -- Else alternative
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else -- Else alternative
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Key_Pressed := None; -- executed, then
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Key_Pressed := None; -- executed, then
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end select; -- task ends.
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end select; -- task ends.
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exception
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exception
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when others =>
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when others =>
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Report.Failed ("Unexpected exception in ATM_Keyboard_Task");
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Report.Failed ("Unexpected exception in ATM_Keyboard_Task");
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end ATM_Keyboard_Task;
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end ATM_Keyboard_Task;
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procedure Read_Card (Card : in out ATM_Card_Type) is
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procedure Read_Card (Card : in out ATM_Card_Type) is
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begin
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begin
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Card.Number := 9999;
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Card.Number := 9999;
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Card.PIN := 111;
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Card.PIN := 111;
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end Read_Card;
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end Read_Card;
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procedure Validate_Card (Card : in ATM_Card_Type) is
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procedure Validate_Card (Card : in ATM_Card_Type) is
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begin
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begin
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-- Simulate an exceedingly long validation activity.
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-- Simulate an exceedingly long validation activity.
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loop -- Infinite loop.
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loop -- Infinite loop.
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Count := (Count + 1) mod Integer (Card.PIN);
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Count := (Count + 1) mod Integer (Card.PIN);
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-- Synch Point to allow transfer of control to Keyboard task
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-- Synch Point to allow transfer of control to Keyboard task
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-- during this simulation
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-- during this simulation
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delay ImpDef.Minimum_Task_Switch;
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delay ImpDef.Minimum_Task_Switch;
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exit when not Report.Equal (Count, Count); -- Always false.
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exit when not Report.Equal (Count, Count); -- Always false.
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end loop;
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end loop;
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end Validate_Card;
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end Validate_Card;
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procedure Perform_Transaction (Card : in ATM_Card_Type) is
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procedure Perform_Transaction (Card : in ATM_Card_Type) is
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begin
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begin
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Report.Failed ("Exception not re-raised immediately following " &
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Report.Failed ("Exception not re-raised immediately following " &
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"asynchronous select");
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"asynchronous select");
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if Count = 1234 then
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if Count = 1234 then
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-- Additional analysis added to aid developers
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-- Additional analysis added to aid developers
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Report.Failed ("Abortable part did not execute");
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Report.Failed ("Abortable part did not execute");
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end if;
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end if;
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end Perform_Transaction;
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end Perform_Transaction;
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end C974005_0;
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end C974005_0;
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--==================================================================--
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--==================================================================--
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with Report;
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with Report;
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with C974005_0; -- Automated teller machine abstraction.
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with C974005_0; -- Automated teller machine abstraction.
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use C974005_0;
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use C974005_0;
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procedure C974005 is
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procedure C974005 is
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Card_Data : ATM_Card_Type;
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Card_Data : ATM_Card_Type;
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begin -- Main program.
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begin -- Main program.
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Report.Test ("C974005", "ATC: trigger is queued but task terminates" &
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Report.Test ("C974005", "ATC: trigger is queued but task terminates" &
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" before call is serviced");
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" before call is serviced");
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Read_Card (Card_Data);
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Read_Card (Card_Data);
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begin
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begin
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declare
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declare
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Keyboard : C974005_0.ATM_Keyboard_Task;
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Keyboard : C974005_0.ATM_Keyboard_Task;
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begin
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begin
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-- --
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-- --
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-- Asynchronous select is tested here --
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-- Asynchronous select is tested here --
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-- --
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-- --
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select
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select
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Keyboard.Cancel_Pressed; -- Entry call initially queued, so
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Keyboard.Cancel_Pressed; -- Entry call initially queued, so
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-- abortable part starts.
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-- abortable part starts.
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-- Tasking_Error raised here when
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-- Tasking_Error raised here when
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-- Keyboard completes before entry
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-- Keyboard completes before entry
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-- call can be accepted, and before
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-- call can be accepted, and before
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-- abortable part completes.
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-- abortable part completes.
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raise Transaction_Canceled; -- Should not be executed.
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raise Transaction_Canceled; -- Should not be executed.
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then abort
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then abort
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Validate_Card (Card_Data); -- Keyboard task completes before
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Validate_Card (Card_Data); -- Keyboard task completes before
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-- Keyboard.Cancel_Pressed is
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-- Keyboard.Cancel_Pressed is
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-- accepted, and before this call
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-- accepted, and before this call
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-- finishes. Tasking_Error is raised
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-- finishes. Tasking_Error is raised
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-- at the point of the entry call,
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-- at the point of the entry call,
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-- and this call is aborted.
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-- and this call is aborted.
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-- Check that the whole of the abortable part is aborted, not just
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-- Check that the whole of the abortable part is aborted, not just
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-- the statement in the abortable part that was executing at
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-- the statement in the abortable part that was executing at
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-- the time
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-- the time
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Report.Failed ("Abortable part not aborted");
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Report.Failed ("Abortable part not aborted");
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end select;
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end select;
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Perform_Transaction (Card_Data); -- Should not be reached.
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Perform_Transaction (Card_Data); -- Should not be reached.
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exception
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exception
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when Transaction_Canceled =>
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when Transaction_Canceled =>
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Report.Failed ("Triggering alternative sequence of statements " &
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Report.Failed ("Triggering alternative sequence of statements " &
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"executed");
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"executed");
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when Tasking_Error =>
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when Tasking_Error =>
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if Count = 1234 then
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if Count = 1234 then
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Report.Failed ("Abortable part did not execute");
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Report.Failed ("Abortable part did not execute");
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end if;
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end if;
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when others =>
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when others =>
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Report.Failed ("Wrong exception raised");
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Report.Failed ("Wrong exception raised");
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end;
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end;
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exception
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exception
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when Tasking_Error =>
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when Tasking_Error =>
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Report.Failed ("Correct exception raised at wrong level");
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Report.Failed ("Correct exception raised at wrong level");
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when others =>
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when others =>
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Report.Failed ("Wrong exception raised at wrong level");
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Report.Failed ("Wrong exception raised at wrong level");
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end;
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end;
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Report.Result;
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Report.Result;
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end C974005;
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end C974005;
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