-- C951002.A
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-- C951002.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 an entry and a procedure within the same protected object
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-- Check that an entry and a procedure within the same protected object
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-- will not be executed simultaneously.
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-- will not be executed simultaneously.
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--
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--
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-- TEST DESCRIPTION:
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-- TEST DESCRIPTION:
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-- Two tasks are used. The first calls an entry who's barrier is set
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-- Two tasks are used. The first calls an entry who's barrier is set
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-- and is thus queued. The second calls a procedure in the same
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-- and is thus queued. The second calls a procedure in the same
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-- protected object. This procedure clears the entry barrier of the
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-- protected object. This procedure clears the entry barrier of the
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-- first then executes a lengthy compute bound procedure. This is
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-- first then executes a lengthy compute bound procedure. This is
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-- intended to allow a multiprocessor, or a time-slicing implementation
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-- intended to allow a multiprocessor, or a time-slicing implementation
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-- of a uniprocessor, to (erroneously) permit the first task to continue
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-- of a uniprocessor, to (erroneously) permit the first task to continue
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-- while the second is still computing. Flags in each process in the
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-- while the second is still computing. Flags in each process in the
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-- PO are checked to ensure that they do not run out of sequence or in
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-- PO are checked to ensure that they do not run out of sequence or in
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-- parallel.
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-- parallel.
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-- In the second part of the test another entry and procedure are used
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-- In the second part of the test another entry and procedure are used
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-- but in this case the procedure is started first. A different task
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-- but in this case the procedure is started first. A different task
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-- calls the entry AFTER the procedure has started. If the entry
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-- calls the entry AFTER the procedure has started. If the entry
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-- completes before the procedure the test fails.
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-- completes before the procedure the test fails.
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--
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--
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-- This test will not be effective on a uniprocessor without time-slicing
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-- This test will not be effective on a uniprocessor without time-slicing
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-- It is designed to increase the chances of failure on a multiprocessor,
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-- It is designed to increase the chances of failure on a multiprocessor,
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-- or a uniprocessor with time-slicing, if the entry and procedure in a
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-- or a uniprocessor with time-slicing, if the entry and procedure in a
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-- Protected Object are not forced to acquire a single execution
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-- Protected Object are not forced to acquire a single execution
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-- resource. It is not guaranteed to fail.
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-- resource. It is not guaranteed to fail.
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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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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 C951002 is
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procedure C951002 is
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-- These global error flags are used for failure conditions within
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-- These global error flags are used for failure conditions within
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-- the protected object. We cannot call Report.Failed (thus Text_io)
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-- the protected object. We cannot call Report.Failed (thus Text_io)
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-- which would result in a bounded error.
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-- which would result in a bounded error.
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--
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--
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TC_Error_01 : Boolean := false;
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TC_Error_01 : Boolean := false;
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TC_Error_02 : Boolean := false;
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TC_Error_02 : Boolean := false;
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TC_Error_03 : Boolean := false;
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TC_Error_03 : Boolean := false;
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TC_Error_04 : Boolean := false;
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TC_Error_04 : Boolean := false;
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TC_Error_05 : Boolean := false;
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TC_Error_05 : Boolean := false;
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TC_Error_06 : Boolean := false;
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TC_Error_06 : Boolean := false;
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begin
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begin
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Report.Test ("C951002", "Check that a procedure and an entry body " &
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Report.Test ("C951002", "Check that a procedure and an entry body " &
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"in a protected object will not run concurrently");
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"in a protected object will not run concurrently");
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declare -- encapsulate the test
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declare -- encapsulate the test
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task Credit_Message is
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task Credit_Message is
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entry TC_Start;
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entry TC_Start;
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end Credit_Message;
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end Credit_Message;
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task Credit_Task is
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task Credit_Task is
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entry TC_Start;
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entry TC_Start;
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end Credit_Task;
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end Credit_Task;
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task Debit_Message is
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task Debit_Message is
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entry TC_Start;
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entry TC_Start;
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end Debit_Message;
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end Debit_Message;
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task Debit_Task is
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task Debit_Task is
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entry TC_Start;
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entry TC_Start;
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end Debit_Task;
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end Debit_Task;
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--====================================
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--====================================
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protected Hold is
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protected Hold is
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entry Wait_for_CR_Underload;
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entry Wait_for_CR_Underload;
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procedure Clear_CR_Overload;
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procedure Clear_CR_Overload;
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entry Wait_for_DB_Underload;
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entry Wait_for_DB_Underload;
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procedure Set_DB_Overload;
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procedure Set_DB_Overload;
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procedure Clear_DB_Overload;
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procedure Clear_DB_Overload;
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--
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--
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function TC_Message_is_Queued return Boolean;
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function TC_Message_is_Queued return Boolean;
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private
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private
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Credit_Overloaded : Boolean := true; -- Test starts in overload
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Credit_Overloaded : Boolean := true; -- Test starts in overload
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Debit_Overloaded : Boolean := false;
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Debit_Overloaded : Boolean := false;
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--
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--
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TC_CR_Proc_Finished : Boolean := false;
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TC_CR_Proc_Finished : Boolean := false;
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TC_CR_Entry_Finished : Boolean := false;
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TC_CR_Entry_Finished : Boolean := false;
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TC_DB_Proc_Finished : Boolean := false;
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TC_DB_Proc_Finished : Boolean := false;
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TC_DB_Entry_Finished : Boolean := false;
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TC_DB_Entry_Finished : Boolean := false;
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end Hold;
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end Hold;
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--====================
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--====================
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protected body Hold is
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protected body Hold is
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entry Wait_for_CR_Underload when not Credit_Overloaded is
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entry Wait_for_CR_Underload when not Credit_Overloaded is
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begin
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begin
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-- The barrier must only be re-evaluated at the end of the
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-- The barrier must only be re-evaluated at the end of the
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-- of the execution of the procedure, also while the procedure
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-- of the execution of the procedure, also while the procedure
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-- is executing this entry body must not be executed
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-- is executing this entry body must not be executed
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if not TC_CR_Proc_Finished then
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if not TC_CR_Proc_Finished then
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TC_Error_01 := true; -- Set error indicator
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TC_Error_01 := true; -- Set error indicator
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end if;
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end if;
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TC_CR_Entry_Finished := true;
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TC_CR_Entry_Finished := true;
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end Wait_for_CR_Underload ;
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end Wait_for_CR_Underload ;
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-- This is the procedure which should NOT be able to run in
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-- This is the procedure which should NOT be able to run in
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-- parallel with the entry body
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-- parallel with the entry body
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--
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--
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procedure Clear_CR_Overload is
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procedure Clear_CR_Overload is
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begin
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begin
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-- The entry body must not be executed until this procedure
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-- The entry body must not be executed until this procedure
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-- is completed.
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-- is completed.
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if TC_CR_Entry_Finished then
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if TC_CR_Entry_Finished then
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TC_Error_02 := true; -- Set error indicator
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TC_Error_02 := true; -- Set error indicator
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end if;
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end if;
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Credit_Overloaded := false; -- clear the entry barrier
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Credit_Overloaded := false; -- clear the entry barrier
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-- Execute an implementation defined compute bound routine which
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-- Execute an implementation defined compute bound routine which
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-- is designed to run long enough to allow a task switch on a
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-- is designed to run long enough to allow a task switch on a
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-- time-sliced uniprocessor, or for a multiprocessor to pick up
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-- time-sliced uniprocessor, or for a multiprocessor to pick up
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-- another task.
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-- another task.
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--
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--
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ImpDef.Exceed_Time_Slice;
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ImpDef.Exceed_Time_Slice;
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-- Again, the entry body must not be executed until the current
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-- Again, the entry body must not be executed until the current
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-- procedure is completed.
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-- procedure is completed.
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--
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--
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if TC_CR_Entry_Finished then
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if TC_CR_Entry_Finished then
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TC_Error_03 := true; -- Set error indicator
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TC_Error_03 := true; -- Set error indicator
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end if;
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end if;
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TC_CR_Proc_Finished := true;
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TC_CR_Proc_Finished := true;
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end Clear_CR_Overload;
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end Clear_CR_Overload;
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--============
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--============
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-- The following subprogram and entry body are used in the second
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-- The following subprogram and entry body are used in the second
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-- part of the test
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-- part of the test
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entry Wait_for_DB_Underload when not Debit_Overloaded is
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entry Wait_for_DB_Underload when not Debit_Overloaded is
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begin
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begin
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-- By the time the task that calls this entry is allowed access to
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-- By the time the task that calls this entry is allowed access to
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-- the queue the barrier, which starts off as open, will be closed
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-- the queue the barrier, which starts off as open, will be closed
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-- by the Set_DB_Overload procedure. It is only reopened
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-- by the Set_DB_Overload procedure. It is only reopened
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-- at the end of the test
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-- at the end of the test
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if not TC_DB_Proc_Finished then
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if not TC_DB_Proc_Finished then
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TC_Error_04 := true; -- Set error indicator
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TC_Error_04 := true; -- Set error indicator
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end if;
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end if;
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TC_DB_Entry_Finished := true;
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TC_DB_Entry_Finished := true;
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end Wait_for_DB_Underload ;
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end Wait_for_DB_Underload ;
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procedure Set_DB_Overload is
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procedure Set_DB_Overload is
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begin
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begin
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-- The task timing is such that this procedure should be started
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-- The task timing is such that this procedure should be started
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-- before the entry is called. Thus the entry should be blocked
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-- before the entry is called. Thus the entry should be blocked
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-- until the end of this procedure which then sets the barrier
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-- until the end of this procedure which then sets the barrier
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--
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--
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if TC_DB_Entry_Finished then
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if TC_DB_Entry_Finished then
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TC_Error_05 := true; -- Set error indicator
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TC_Error_05 := true; -- Set error indicator
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end if;
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end if;
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-- Execute an implementation defined compute bound routine which
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-- Execute an implementation defined compute bound routine which
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-- is designed to run long enough to allow a task switch on a
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-- is designed to run long enough to allow a task switch on a
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-- time-sliced uniprocessor, or for a multiprocessor to pick up
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-- time-sliced uniprocessor, or for a multiprocessor to pick up
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-- another task
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-- another task
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--
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--
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ImpDef.Exceed_Time_Slice;
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ImpDef.Exceed_Time_Slice;
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Debit_Overloaded := true; -- set the entry barrier
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Debit_Overloaded := true; -- set the entry barrier
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if TC_DB_Entry_Finished then
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if TC_DB_Entry_Finished then
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TC_Error_06 := true; -- Set error indicator
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TC_Error_06 := true; -- Set error indicator
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end if;
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end if;
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TC_DB_Proc_Finished := true;
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TC_DB_Proc_Finished := true;
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end Set_DB_Overload;
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end Set_DB_Overload;
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procedure Clear_DB_Overload is
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procedure Clear_DB_Overload is
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begin
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begin
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Debit_Overloaded := false; -- open the entry barrier
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Debit_Overloaded := false; -- open the entry barrier
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end Clear_DB_Overload;
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end Clear_DB_Overload;
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function TC_Message_is_Queued return Boolean is
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function TC_Message_is_Queued return Boolean is
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begin
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begin
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-- returns true when one message arrives on the queue
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-- returns true when one message arrives on the queue
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return (Wait_for_CR_Underload'Count = 1);
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return (Wait_for_CR_Underload'Count = 1);
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end TC_Message_is_Queued ;
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end TC_Message_is_Queued ;
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end Hold;
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end Hold;
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--====================================
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--====================================
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task body Credit_Message is
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task body Credit_Message is
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begin
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begin
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accept TC_Start;
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accept TC_Start;
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--:: some application processing. Part of the process finds that
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--:: some application processing. Part of the process finds that
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-- the Overload threshold has been exceeded for the Credit
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-- the Overload threshold has been exceeded for the Credit
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-- application. This message task queues itself on a queue
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-- application. This message task queues itself on a queue
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-- waiting till the overload in no longer in effect
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-- waiting till the overload in no longer in effect
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Hold.Wait_for_CR_Underload;
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Hold.Wait_for_CR_Underload;
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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_Message Task");
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Report.Failed ("Unexpected Exception in Credit_Message Task");
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end Credit_Message;
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end Credit_Message;
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task body Credit_Task is
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task body Credit_Task is
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begin
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begin
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accept TC_Start;
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accept TC_Start;
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-- Application code here (not shown) determines that the
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-- Application code here (not shown) determines that the
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-- underload threshold has been reached
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-- underload threshold has been reached
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Hold.Clear_CR_Overload;
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Hold.Clear_CR_Overload;
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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_Task");
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Report.Failed ("Unexpected Exception in Credit_Task");
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end Credit_Task;
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end Credit_Task;
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--==============
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--==============
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-- The following two tasks are used in the second part of the test
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-- The following two tasks are used in the second part of the test
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task body Debit_Message is
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task body Debit_Message is
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begin
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begin
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accept TC_Start;
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accept TC_Start;
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--:: some application processing. Part of the process finds that
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--:: some application processing. Part of the process finds that
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-- the Overload threshold has been exceeded for the Debit
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-- the Overload threshold has been exceeded for the Debit
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-- application. This message task queues itself on a queue
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-- application. This message task queues itself on a queue
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-- waiting till the overload is no longer in effect
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-- waiting till the overload is no longer in effect
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--
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--
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Hold.Wait_for_DB_Underload;
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Hold.Wait_for_DB_Underload;
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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 Debit_Message Task");
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Report.Failed ("Unexpected Exception in Debit_Message Task");
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end Debit_Message;
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end Debit_Message;
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task body Debit_Task is
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task body Debit_Task is
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begin
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begin
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accept TC_Start;
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accept TC_Start;
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-- Application code here (not shown) determines that the
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-- Application code here (not shown) determines that the
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-- underload threshold has been reached
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-- underload threshold has been reached
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Hold.Set_DB_Overload;
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Hold.Set_DB_Overload;
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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 Debit_Task");
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Report.Failed ("Unexpected Exception in Debit_Task");
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end Debit_Task;
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end Debit_Task;
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begin -- declare
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begin -- declare
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Credit_Message.TC_Start;
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Credit_Message.TC_Start;
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-- Wait until the message is queued on the entry before starting
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-- Wait until the message is queued on the entry before starting
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-- the Credit_Task
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-- the Credit_Task
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while not Hold.TC_Message_is_Queued loop
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while not Hold.TC_Message_is_Queued loop
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delay ImpDef.Long_Minimum_Task_Switch;
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delay ImpDef.Long_Minimum_Task_Switch;
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end loop;
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end loop;
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--
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--
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Credit_Task.TC_Start;
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Credit_Task.TC_Start;
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-- Ensure the first part of the test is complete before continuing
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-- Ensure the first part of the test is complete before continuing
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while not (Credit_Message'terminated and Credit_Task'terminated) loop
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while not (Credit_Message'terminated and Credit_Task'terminated) loop
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delay ImpDef.Long_Minimum_Task_Switch;
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delay ImpDef.Long_Minimum_Task_Switch;
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end loop;
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end loop;
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--======================================================
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--======================================================
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-- Second part of the test
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-- Second part of the test
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Debit_Task.TC_Start;
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Debit_Task.TC_Start;
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-- Delay long enough to allow a task switch to the Debit_Task and
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-- Delay long enough to allow a task switch to the Debit_Task and
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-- for it to reach the accept statement and call Hold.Set_DB_Overload
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-- for it to reach the accept statement and call Hold.Set_DB_Overload
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-- before starting Debit_Message
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-- before starting Debit_Message
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--
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--
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delay ImpDef.Long_Switch_To_New_Task;
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delay ImpDef.Long_Switch_To_New_Task;
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Debit_Message.TC_Start;
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Debit_Message.TC_Start;
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while not Debit_Task'terminated loop
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while not Debit_Task'terminated loop
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delay ImpDef.Long_Minimum_Task_Switch;
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delay ImpDef.Long_Minimum_Task_Switch;
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end loop;
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end loop;
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Hold.Clear_DB_Overload; -- Allow completion
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Hold.Clear_DB_Overload; -- Allow completion
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end; -- declare (encapsulation)
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end; -- declare (encapsulation)
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if TC_Error_01 then
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if TC_Error_01 then
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Report.Failed ("Wait_for_CR_Underload executed out of sequence");
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Report.Failed ("Wait_for_CR_Underload executed out of sequence");
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end if;
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end if;
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if TC_Error_02 then
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if TC_Error_02 then
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Report.Failed ("Credit: Entry executed before procedure");
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Report.Failed ("Credit: Entry executed before procedure");
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end if;
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end if;
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if TC_Error_03 then
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if TC_Error_03 then
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Report.Failed ("Credit: Entry executed in parallel");
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Report.Failed ("Credit: Entry executed in parallel");
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end if;
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end if;
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if TC_Error_04 then
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if TC_Error_04 then
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Report.Failed ("Wait_for_DB_Underload executed out of sequence");
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Report.Failed ("Wait_for_DB_Underload executed out of sequence");
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end if;
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end if;
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if TC_Error_05 then
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if TC_Error_05 then
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Report.Failed ("Debit: Entry executed before procedure");
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Report.Failed ("Debit: Entry executed before procedure");
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end if;
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end if;
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if TC_Error_06 then
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if TC_Error_06 then
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Report.Failed ("Debit: Entry executed in parallel");
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Report.Failed ("Debit: Entry executed in parallel");
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end if;
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end if;
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Report.Result;
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Report.Result;
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end C951002;
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end C951002;
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