-- C954024.A
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-- C954024.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 a call to a protected entry can be requeued to a task
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-- Check that a call to a protected entry can be requeued to a task
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-- entry. Check that the requeue is placed on the correct entry; that the
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-- entry. Check that the requeue is placed on the correct entry; that the
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-- original caller waits for the completion of the requeue and continues
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-- original caller waits for the completion of the requeue and continues
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-- after the requeued rendezvous. Check that the requeue does not block.
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-- after the requeued rendezvous. Check that the requeue does not block.
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-- Specifically, check a requeue without abort from a protected entry to
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-- Specifically, check a requeue without abort from a protected entry to
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-- an entry in a task.
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-- an entry in a task.
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--
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--
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-- TEST DESCRIPTION:
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-- TEST DESCRIPTION:
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-- In the Distributor protected object, requeue two successive calls on
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-- In the Distributor protected object, requeue two successive calls on
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-- the entries of two separate target tasks. Each task in each of the
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-- the entries of two separate target tasks. Each task in each of the
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-- paths adds identifying information in the transaction being passed.
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-- paths adds identifying information in the transaction being passed.
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-- This information is checked by the Message tasks on completion
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-- This information is checked by the Message tasks on completion
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-- ensuring that the requeues have been placed on the correct queues.
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-- ensuring that the requeues have been placed on the correct queues.
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-- There is an artificial guard on the Credit Task to ensure that the
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-- There is an artificial guard on the Credit Task to ensure that the
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-- input is queued; this guard is released by the Debit task which
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-- input is queued; this guard is released by the Debit task which
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-- handles its input immediately. This ensures that we have one of the
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-- handles its input immediately. This ensures that we have one of the
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-- requeued items actually queued for later handling and also verifies
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-- requeued items actually queued for later handling and also verifies
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-- that the requeuing process (in the protected object) is not blocked.
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-- that the requeuing process (in the protected object) is not blocked.
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--
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--
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-- This series of tests uses a simulation of a transaction driven
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-- This series of tests uses a simulation of a transaction driven
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-- processing system. Line Drivers accept input from an external source
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-- processing system. Line Drivers accept input from an external source
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-- and build them into transaction records. These records are then
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-- and build them into transaction records. These records are then
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-- encapsulated in message tasks which remain extant for the life of the
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-- encapsulated in message tasks which remain extant for the life of the
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-- transaction in the system. The message tasks put themselves on the
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-- transaction in the system. The message tasks put themselves on the
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-- input queue of a Distributor object which, from information in the
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-- input queue of a Distributor object which, from information in the
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-- transaction and/or system load conditions forwards them to other
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-- transaction and/or system load conditions forwards them to other
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-- operating tasks. These in turn might forward the transactions to yet
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-- operating tasks. These in turn might forward the transactions to yet
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-- other tasks for further action. The routing is, in real life,
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-- other tasks for further action. The routing is, in real life,
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-- dynamic and unpredictable at the time of message generation. All
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-- dynamic and unpredictable at the time of message generation. All
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-- rerouting in this model is done by means of requeues.
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-- rerouting in this model is done by means of requeues.
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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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-- 08 Nov 95 SAIC Fixed reported problems for ACVC 2.0.1
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-- 08 Nov 95 SAIC Fixed reported problems for ACVC 2.0.1
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--
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--
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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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procedure C954024 is
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procedure C954024 is
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begin -- C954024
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begin -- C954024
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Report.Test ("C954024", "Requeue from protected entry to task entry");
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Report.Test ("C954024", "Requeue from protected entry to task entry");
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declare -- encapsulate the test
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declare -- encapsulate the test
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-- Arbitrary test values
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-- Arbitrary test values
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Credit_Return : constant := 1;
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Credit_Return : constant := 1;
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Debit_Return : constant := 2;
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Debit_Return : constant := 2;
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type Transaction_Code is (Credit, Debit);
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type Transaction_Code is (Credit, Debit);
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type Transaction_Record;
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type Transaction_Record;
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type acc_Transaction_Record is access Transaction_Record;
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type acc_Transaction_Record is access Transaction_Record;
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type Transaction_Record is
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type Transaction_Record is
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record
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record
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ID : integer := 0;
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ID : integer := 0;
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Code : Transaction_Code := Debit;
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Code : Transaction_Code := Debit;
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Account_Number : integer := 0;
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Account_Number : integer := 0;
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Stock_Number : integer := 0;
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Stock_Number : integer := 0;
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Quantity : integer := 0;
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Quantity : integer := 0;
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Return_Value : integer := 0;
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Return_Value : integer := 0;
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TC_Message_Count : integer := 0;
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TC_Message_Count : integer := 0;
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TC_Thru_Dist : Boolean := false;
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TC_Thru_Dist : Boolean := false;
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end record;
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end record;
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task type Message_Task is
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task type Message_Task is
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entry Accept_Transaction (In_Transaction : acc_Transaction_Record);
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entry Accept_Transaction (In_Transaction : acc_Transaction_Record);
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end Message_Task;
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end Message_Task;
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type acc_Message_Task is access Message_Task;
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type acc_Message_Task is access Message_Task;
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task Line_Driver is
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task Line_Driver is
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entry Start;
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entry Start;
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end Line_Driver;
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end Line_Driver;
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task Credit_Computation is
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task Credit_Computation is
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entry Input(Transaction : acc_Transaction_Record);
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entry Input(Transaction : acc_Transaction_Record);
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end Credit_Computation;
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end Credit_Computation;
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task Debit_Computation is
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task Debit_Computation is
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entry Input(Transaction : acc_Transaction_Record);
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entry Input(Transaction : acc_Transaction_Record);
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end Debit_Computation;
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end Debit_Computation;
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protected Time_Lock is
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protected Time_Lock is
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procedure Credit_Start;
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procedure Credit_Start;
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function Credit_Enabled return Boolean;
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function Credit_Enabled return Boolean;
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private
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private
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Credit_OK : Boolean := false;
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Credit_OK : Boolean := false;
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end Time_Lock;
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end Time_Lock;
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protected body Time_Lock is
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protected body Time_Lock is
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procedure Credit_Start is
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procedure Credit_Start is
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begin
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begin
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Credit_OK := true;
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Credit_OK := true;
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end Credit_Start;
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end Credit_Start;
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function Credit_Enabled return Boolean is
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function Credit_Enabled return Boolean is
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begin
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begin
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return Credit_OK;
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return Credit_OK;
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end Credit_Enabled;
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end Credit_Enabled;
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end Time_Lock;
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end Time_Lock;
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protected Distributor is
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protected Distributor is
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entry Input (Transaction : acc_Transaction_Record);
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entry Input (Transaction : acc_Transaction_Record);
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end Distributor;
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end Distributor;
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--
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--
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--
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--
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-- Dispose each input Transaction_Record to the appropriate
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-- Dispose each input Transaction_Record to the appropriate
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-- computation tasks
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-- computation tasks
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--
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--
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protected body Distributor is
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protected body Distributor is
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entry Input (Transaction : acc_Transaction_Record) when true is
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entry Input (Transaction : acc_Transaction_Record) when true is
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-- barrier is always open
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-- barrier is always open
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begin
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begin
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-- Test Control: Set the indicator in the message to show it has
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-- Test Control: Set the indicator in the message to show it has
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-- passed through the Distributor object
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-- passed through the Distributor object
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Transaction.TC_thru_Dist := true;
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Transaction.TC_thru_Dist := true;
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-- Pass this transaction on to the appropriate computation
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-- Pass this transaction on to the appropriate computation
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-- task
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-- task
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case Transaction.Code is
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case Transaction.Code is
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when Credit =>
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when Credit =>
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requeue Credit_Computation.Input;
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requeue Credit_Computation.Input;
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when Debit =>
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when Debit =>
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requeue Debit_Computation.Input;
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requeue Debit_Computation.Input;
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end case;
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end case;
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end Input;
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end Input;
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end Distributor;
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end Distributor;
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-- Assemble messages received from an external source
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-- Assemble messages received from an external source
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-- Creates a message task for each. The message tasks remain extant
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-- Creates a message task for each. The message tasks remain extant
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-- for the life of the messages in the system.
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-- for the life of the messages in the system.
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-- NOTE:
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-- NOTE:
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-- The Line Driver task would normally be designed to loop continuously
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-- The Line Driver task would normally be designed to loop continuously
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-- creating the messages as input is received. Simulate this
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-- creating the messages as input is received. Simulate this
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-- but limit it to two dummy messages for this test and allow it
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-- but limit it to two dummy messages for this test and allow it
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-- to terminate at that point
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-- to terminate at that point
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--
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--
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task body Line_Driver is
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task body Line_Driver is
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Current_ID : integer := 1;
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Current_ID : integer := 1;
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TC_Last_was_for_credit : Boolean := false;
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TC_Last_was_for_credit : Boolean := false;
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procedure Build_Credit_Record
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procedure Build_Credit_Record
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( Next_Transaction : acc_Transaction_Record ) is
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( Next_Transaction : acc_Transaction_Record ) is
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Dummy_Account : constant integer := 100;
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Dummy_Account : constant integer := 100;
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begin
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begin
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Next_Transaction.ID := Current_ID;
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Next_Transaction.ID := Current_ID;
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Next_Transaction.Code := Credit;
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Next_Transaction.Code := Credit;
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Next_Transaction.Account_Number := Dummy_Account;
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Next_Transaction.Account_Number := Dummy_Account;
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Current_ID := Current_ID + 1;
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Current_ID := Current_ID + 1;
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end Build_Credit_Record;
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end Build_Credit_Record;
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procedure Build_Debit_Record
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procedure Build_Debit_Record
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( Next_Transaction : acc_Transaction_Record ) is
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( Next_Transaction : acc_Transaction_Record ) is
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Dummy_Account : constant integer := 200;
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Dummy_Account : constant integer := 200;
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begin
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begin
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Next_Transaction.ID := Current_ID;
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Next_Transaction.ID := Current_ID;
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Next_Transaction.Code := Debit;
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Next_Transaction.Code := Debit;
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Next_Transaction.Account_Number := Dummy_Account;
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Next_Transaction.Account_Number := Dummy_Account;
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Current_ID := Current_ID + 1;
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Current_ID := Current_ID + 1;
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end Build_Debit_Record;
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end Build_Debit_Record;
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begin
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begin
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accept Start; -- Wait for trigger from Main
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accept Start; -- Wait for trigger from Main
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for i in 1..2 loop -- arbitrarily limit to two messages for the test
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for i in 1..2 loop -- arbitrarily limit to two messages for the test
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declare
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declare
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-- Create a task for the next message
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-- Create a task for the next message
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Next_Message_Task : acc_Message_Task := new Message_Task;
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Next_Message_Task : acc_Message_Task := new Message_Task;
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-- Create a record for it
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-- Create a record for it
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Next_Transaction : acc_Transaction_Record
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Next_Transaction : acc_Transaction_Record
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:= new Transaction_Record;
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:= new Transaction_Record;
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begin
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begin
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if TC_Last_was_for_credit then
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if TC_Last_was_for_credit then
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Build_Debit_Record ( Next_Transaction );
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Build_Debit_Record ( Next_Transaction );
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else
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else
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Build_Credit_Record( Next_Transaction );
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Build_Credit_Record( Next_Transaction );
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TC_Last_was_for_credit := true;
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TC_Last_was_for_credit := true;
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end if;
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end if;
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Next_Message_Task.Accept_Transaction ( Next_Transaction );
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Next_Message_Task.Accept_Transaction ( Next_Transaction );
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end; -- declare
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end; -- declare
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end loop;
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end loop;
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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 Line_Driver");
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Report.Failed ("Unexpected exception in Line_Driver");
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end Line_Driver;
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end Line_Driver;
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task body Message_Task is
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task body Message_Task is
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TC_Original_Transaction_Code : Transaction_Code;
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TC_Original_Transaction_Code : Transaction_Code;
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This_Transaction : acc_Transaction_Record := new Transaction_Record;
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This_Transaction : acc_Transaction_Record := new Transaction_Record;
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begin
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begin
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accept Accept_Transaction
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accept Accept_Transaction
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(In_Transaction : acc_Transaction_Record) do
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(In_Transaction : acc_Transaction_Record) do
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This_Transaction.all := In_Transaction.all;
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This_Transaction.all := In_Transaction.all;
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end Accept_Transaction;
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end Accept_Transaction;
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-- Note the original code to ensure correct return
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-- Note the original code to ensure correct return
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TC_Original_Transaction_Code := This_Transaction.Code;
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TC_Original_Transaction_Code := This_Transaction.Code;
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-- Queue up on Distributor's Input queue
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-- Queue up on Distributor's Input queue
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Distributor.Input ( This_Transaction );
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Distributor.Input ( This_Transaction );
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-- This task will now wait for the requeued rendezvous
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-- This task will now wait for the requeued rendezvous
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-- to complete before proceeding
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-- to complete before proceeding
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-- After the required computations have been performed
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-- After the required computations have been performed
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-- return the Transaction_Record appropriately (probably to an output
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-- return the Transaction_Record appropriately (probably to an output
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-- line driver)
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-- line driver)
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null; -- stub
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null; -- stub
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-- The following is all Test Control Code
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-- The following is all Test Control Code
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-- Check that the return values are as expected
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-- Check that the return values are as expected
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if TC_Original_Transaction_Code /= This_Transaction.Code then
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if TC_Original_Transaction_Code /= This_Transaction.Code then
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-- Incorrect rendezvous
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-- Incorrect rendezvous
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Report.Failed ("Message Task: Incorrect code returned");
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Report.Failed ("Message Task: Incorrect code returned");
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end if;
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end if;
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if This_Transaction.Code = Credit then
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if This_Transaction.Code = Credit then
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if This_Transaction.Return_Value /= Credit_Return or
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if This_Transaction.Return_Value /= Credit_Return or
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This_Transaction.TC_Message_Count /= 1 or
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This_Transaction.TC_Message_Count /= 1 or
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not This_Transaction.TC_thru_Dist then
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not This_Transaction.TC_thru_Dist then
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Report.Failed ("Expected path not traversed");
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Report.Failed ("Expected path not traversed");
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end if;
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end if;
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else
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else
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if This_Transaction.Return_Value /= Debit_Return or
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if This_Transaction.Return_Value /= Debit_Return or
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This_Transaction.TC_Message_Count /= 1 or
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This_Transaction.TC_Message_Count /= 1 or
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not This_Transaction.TC_thru_Dist then
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not This_Transaction.TC_thru_Dist then
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Report.Failed ("Expected path not traversed");
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Report.Failed ("Expected path not traversed");
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end if;
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end if;
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end if;
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end if;
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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 Message_Task");
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Report.Failed ("Unexpected exception in Message_Task");
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end Message_Task;
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end Message_Task;
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-- Computation task.
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-- Computation task.
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-- Note: After the computation is performed in this task and the
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-- Note: After the computation is performed in this task and the
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-- accept body is completed the rendezvous in the original
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-- accept body is completed the rendezvous in the original
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-- message task is completed.
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-- message task is completed.
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--
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--
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task body Credit_Computation is
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task body Credit_Computation is
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Message_Count : integer := 0;
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Message_Count : integer := 0;
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begin
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begin
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loop
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loop
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select
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select
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when Time_Lock.Credit_enabled =>
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when Time_Lock.Credit_enabled =>
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accept Input ( Transaction : acc_Transaction_Record) do
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accept Input ( Transaction : acc_Transaction_Record) do
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-- Perform the computations required for this transaction
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-- Perform the computations required for this transaction
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null; -- stub
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null; -- stub
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-- For the test:
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-- For the test:
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if not Transaction.TC_thru_Dist then
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if not Transaction.TC_thru_Dist then
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Report.Failed
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Report.Failed
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("Credit Task: Wrong queue, Distributor bypassed");
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("Credit Task: Wrong queue, Distributor bypassed");
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end if;
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end if;
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if Transaction.code /= Credit then
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if Transaction.code /= Credit then
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Report.Failed
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Report.Failed
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("Credit Task: Requeue delivered to the wrong queue");
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("Credit Task: Requeue delivered to the wrong queue");
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end if;
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end if;
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-- for the test plug a known value and count
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-- for the test plug a known value and count
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Transaction.Return_Value := Credit_Return;
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Transaction.Return_Value := Credit_Return;
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-- one, and only one message should pass through
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-- one, and only one message should pass through
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Message_Count := Message_Count + 1;
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Message_Count := Message_Count + 1;
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Transaction.TC_Message_Count := Message_Count;
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Transaction.TC_Message_Count := Message_Count;
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end Input;
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end Input;
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exit; -- one message is enough
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exit; -- one message is enough
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else
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else
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delay ImpDef.Clear_Ready_Queue; -- poll
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delay ImpDef.Clear_Ready_Queue; -- poll
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end select;
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end select;
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end loop;
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end loop;
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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 Credit_Computation");
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Report.Failed ("Unexpected exception in Credit_Computation");
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end Credit_Computation;
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end Credit_Computation;
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-- Computation task.
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-- Computation task.
|
-- Note: After the computation is performed in this task and the
|
-- Note: After the computation is performed in this task and the
|
-- accept body is completed the rendezvous in the original
|
-- accept body is completed the rendezvous in the original
|
-- message task is completed.
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-- message task is completed.
|
--
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--
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task body Debit_Computation is
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task body Debit_Computation is
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Message_Count : integer := 0;
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Message_Count : integer := 0;
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begin
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begin
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loop
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loop
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select
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select
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accept Input (Transaction : acc_Transaction_Record) do
|
accept Input (Transaction : acc_Transaction_Record) do
|
-- Perform the computations required for this message
|
-- Perform the computations required for this message
|
null; -- stub
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null; -- stub
|
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|
-- For the test:
|
-- For the test:
|
if not Transaction.TC_thru_Dist then
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if not Transaction.TC_thru_Dist then
|
Report.Failed
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Report.Failed
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("Debit Task: Wrong queue, Distributor bypassed");
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("Debit Task: Wrong queue, Distributor bypassed");
|
end if;
|
end if;
|
if Transaction.code /= Debit then
|
if Transaction.code /= Debit then
|
Report.Failed
|
Report.Failed
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("Debit Task: Requeue delivered to the wrong queue");
|
("Debit Task: Requeue delivered to the wrong queue");
|
end if;
|
end if;
|
|
|
-- for the test plug a known value and count
|
-- for the test plug a known value and count
|
Transaction.Return_Value := Debit_Return;
|
Transaction.Return_Value := Debit_Return;
|
-- one, and only one, message should pass through
|
-- one, and only one, message should pass through
|
Message_Count := Message_Count + 1;
|
Message_Count := Message_Count + 1;
|
Transaction.TC_Message_Count := Message_Count;
|
Transaction.TC_Message_Count := Message_Count;
|
-- for the test: once we have completed the only Debit
|
-- for the test: once we have completed the only Debit
|
-- message release the Credit Messages which are queued
|
-- message release the Credit Messages which are queued
|
-- on the Credit Input queue
|
-- on the Credit Input queue
|
Time_Lock.Credit_Start;
|
Time_Lock.Credit_Start;
|
|
|
end Input;
|
end Input;
|
or
|
or
|
terminate;
|
terminate;
|
end select;
|
end select;
|
end loop;
|
end loop;
|
exception
|
exception
|
when others =>
|
when others =>
|
Report.Failed ("Unexpected exception in Debit_Computation");
|
Report.Failed ("Unexpected exception in Debit_Computation");
|
|
|
end Debit_Computation;
|
end Debit_Computation;
|
|
|
begin -- declare block
|
begin -- declare block
|
Line_Driver.Start;
|
Line_Driver.Start;
|
end; -- test encapsulation
|
end; -- test encapsulation
|
|
|
Report.Result;
|
Report.Result;
|
|
|
end C954024;
|
end C954024;
|
|
|
