-- CB20004.A
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-- CB20004.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 exceptions propagate correctly from objects of
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-- Check that exceptions propagate correctly from objects of
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-- protected types. Check propagation from protected entry bodies.
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-- protected types. Check propagation from protected entry bodies.
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--
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--
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-- TEST DESCRIPTION:
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-- TEST DESCRIPTION:
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-- Declare a package with a protected type, including entries and private
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-- Declare a package with a protected type, including entries and private
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-- data, simulating a bounded buffer abstraction. In the main procedure,
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-- data, simulating a bounded buffer abstraction. In the main procedure,
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-- perform entry calls on an object of the protected type that raises
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-- perform entry calls on an object of the protected type that raises
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-- exceptions.
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-- exceptions.
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-- Ensure that the exceptions are:
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-- Ensure that the exceptions are:
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-- 1) raised and handled locally in the entry body
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-- 1) raised and handled locally in the entry body
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-- 2) raised in the entry body and handled/reraised to be handled
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-- 2) raised in the entry body and handled/reraised to be handled
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-- by the caller.
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-- by the caller.
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-- 3) raised in the entry body and propagated directly to the calling
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-- 3) raised in the entry body and propagated directly to the calling
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-- procedure.
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-- procedure.
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--
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--
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--
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--
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-- CHANGE HISTORY:
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-- CHANGE HISTORY:
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-- 06 Dec 94 SAIC ACVC 2.0
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-- 06 Dec 94 SAIC ACVC 2.0
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--
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--
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--!
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--!
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package CB20004_0 is -- Package Buffer.
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package CB20004_0 is -- Package Buffer.
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Max_Buffer_Size : constant := 2;
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Max_Buffer_Size : constant := 2;
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Handled_In_Body,
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Handled_In_Body,
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Propagated_To_Caller,
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Propagated_To_Caller,
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Handled_In_Caller : Boolean := False;
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Handled_In_Caller : Boolean := False;
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Data_Over_5,
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Data_Over_5,
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Data_Degradation : exception;
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Data_Degradation : exception;
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type Data_Item is range 0 .. 100;
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type Data_Item is range 0 .. 100;
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type Item_Array_Type is array (1 .. Max_Buffer_Size) of Data_Item;
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type Item_Array_Type is array (1 .. Max_Buffer_Size) of Data_Item;
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protected type Bounded_Buffer is
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protected type Bounded_Buffer is
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entry Put (Item : in Data_Item);
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entry Put (Item : in Data_Item);
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entry Get (Item : out Data_Item);
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entry Get (Item : out Data_Item);
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private
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private
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Item_Array : Item_Array_Type;
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Item_Array : Item_Array_Type;
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I, J : Integer range 1 .. Max_Buffer_Size := 1;
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I, J : Integer range 1 .. Max_Buffer_Size := 1;
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Count : Integer range 0 .. Max_Buffer_Size := 0;
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Count : Integer range 0 .. Max_Buffer_Size := 0;
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end Bounded_Buffer;
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end Bounded_Buffer;
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end CB20004_0;
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end CB20004_0;
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--=================================================================--
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--=================================================================--
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with Report;
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with Report;
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package body CB20004_0 is -- Package Buffer.
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package body CB20004_0 is -- Package Buffer.
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protected body Bounded_Buffer is
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protected body Bounded_Buffer is
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entry Put (Item : in Data_Item) when Count < Max_Buffer_Size is
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entry Put (Item : in Data_Item) when Count < Max_Buffer_Size is
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begin
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begin
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if Item > 10 then
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if Item > 10 then
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Item_Array (I) := Item * 8; -- Constraint_Error will be raised
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Item_Array (I) := Item * 8; -- Constraint_Error will be raised
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elsif Item > 5 then -- and handled in entry body.
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elsif Item > 5 then -- and handled in entry body.
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raise Data_Over_5; -- Exception handled/reraised in
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raise Data_Over_5; -- Exception handled/reraised in
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else -- entry body, propagated to caller.
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else -- entry body, propagated to caller.
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Item_Array (I) := Item; -- Store data item in buffer.
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Item_Array (I) := Item; -- Store data item in buffer.
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I := (I mod Max_Buffer_Size) + 1;
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I := (I mod Max_Buffer_Size) + 1;
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Count := Count + 1;
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Count := Count + 1;
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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 Constraint_Error =>
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when Constraint_Error =>
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Handled_In_Body := True;
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Handled_In_Body := True;
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when Data_Over_5 =>
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when Data_Over_5 =>
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Propagated_To_Caller := True;
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Propagated_To_Caller := True;
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raise; -- Propagate the exception to the caller.
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raise; -- Propagate the exception to the caller.
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end Put;
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end Put;
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entry Get (Item : out Data_Item) when Count > 0 is
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entry Get (Item : out Data_Item) when Count > 0 is
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begin
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begin
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Item := Item_Array(J);
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Item := Item_Array(J);
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J := (J mod Max_Buffer_Size) + 1;
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J := (J mod Max_Buffer_Size) + 1;
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Count := Count - 1;
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Count := Count - 1;
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if Count = 0 then
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if Count = 0 then
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raise Data_Degradation; -- Exception to propagate to caller.
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raise Data_Degradation; -- Exception to propagate to caller.
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end if;
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end if;
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end Get;
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end Get;
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end Bounded_Buffer;
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end Bounded_Buffer;
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end CB20004_0;
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end CB20004_0;
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--=================================================================--
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--=================================================================--
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with CB20004_0; -- Package Buffer.
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with CB20004_0; -- Package Buffer.
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with Report;
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with Report;
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procedure CB20004 is
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procedure CB20004 is
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package Buffer renames CB20004_0;
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package Buffer renames CB20004_0;
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Data : Buffer.Data_Item := Buffer.Data_Item'First;
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Data : Buffer.Data_Item := Buffer.Data_Item'First;
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Data_Buffer : Buffer.Bounded_Buffer; -- an object of protected type.
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Data_Buffer : Buffer.Bounded_Buffer; -- an object of protected type.
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Handled_In_Caller : Boolean := False; -- same name as boolean declared
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Handled_In_Caller : Boolean := False; -- same name as boolean declared
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-- in package Buffer.
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-- in package Buffer.
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begin
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begin
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Report.Test ("CB20004", "Check that exceptions propagate correctly " &
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Report.Test ("CB20004", "Check that exceptions propagate correctly " &
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"from objects of protected types" );
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"from objects of protected types" );
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Initial_Data_Block:
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Initial_Data_Block:
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begin -- Data causes Constraint_Error.
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begin -- Data causes Constraint_Error.
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Data_Buffer.Put (CB20004_0.Data_Item(Report.Ident_Int(51)));
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Data_Buffer.Put (CB20004_0.Data_Item(Report.Ident_Int(51)));
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exception
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exception
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when Constraint_Error =>
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when Constraint_Error =>
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Buffer.Handled_In_Body := False; -- Improper exception handling
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Buffer.Handled_In_Body := False; -- Improper exception handling
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-- in entry body.
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-- in entry body.
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Report.Failed ("Exception propagated to caller " &
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Report.Failed ("Exception propagated to caller " &
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" from Initial_Data_Block");
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" from Initial_Data_Block");
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when others =>
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when others =>
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Report.Failed ("Exception raised in processing and " &
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Report.Failed ("Exception raised in processing and " &
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"propagated to caller from Initial_Data_Block");
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"propagated to caller from Initial_Data_Block");
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end Initial_Data_Block;
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end Initial_Data_Block;
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Data_Entry_Block:
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Data_Entry_Block:
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begin
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begin
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-- Valid data. No exception.
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-- Valid data. No exception.
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Data_Buffer.Put (CB20004_0.Data_Item(Report.Ident_Int(3)));
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Data_Buffer.Put (CB20004_0.Data_Item(Report.Ident_Int(3)));
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-- Data will cause exception.
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-- Data will cause exception.
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Data_Buffer.Put (7); -- Call protected object entry,
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Data_Buffer.Put (7); -- Call protected object entry,
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-- exception to be handled/
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-- exception to be handled/
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-- reraised in entry body.
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-- reraised in entry body.
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Report.Failed ("Data_Over_5 Exception not raised in processing");
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Report.Failed ("Data_Over_5 Exception not raised in processing");
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exception
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exception
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when Buffer.Data_Over_5 =>
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when Buffer.Data_Over_5 =>
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if Buffer.Propagated_To_Caller then -- Reraised in entry body?
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if Buffer.Propagated_To_Caller then -- Reraised in entry body?
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Buffer.Handled_In_Caller := True;
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Buffer.Handled_In_Caller := True;
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else
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else
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Report.Failed ("Exception not reraised in entry body");
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Report.Failed ("Exception not reraised in entry body");
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end if;
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end if;
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when others =>
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when others =>
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Report.Failed ("Exception raised in processing and propagated " &
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Report.Failed ("Exception raised in processing and propagated " &
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"to caller from Data_Entry_Block");
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"to caller from Data_Entry_Block");
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end Data_Entry_Block;
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end Data_Entry_Block;
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Data_Retrieval_Block:
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Data_Retrieval_Block:
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begin
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begin
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Data_Buffer.Get (Data); -- Retrieval of buffer data, buffer now empty.
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Data_Buffer.Get (Data); -- Retrieval of buffer data, buffer now empty.
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-- Exception will be raised in entry body, with
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-- Exception will be raised in entry body, with
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-- propagation to caller.
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-- propagation to caller.
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Report.Failed ("Data_Degradation Exception not raised in processing");
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Report.Failed ("Data_Degradation Exception not raised in processing");
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exception
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exception
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when Buffer.Data_Degradation =>
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when Buffer.Data_Degradation =>
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Handled_In_Caller := True; -- Local Boolean used here.
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Handled_In_Caller := True; -- Local Boolean used here.
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when others =>
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when others =>
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Report.Failed ("Exception raised in processing and propagated " &
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Report.Failed ("Exception raised in processing and propagated " &
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"to caller from Data_Retrieval_Block");
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"to caller from Data_Retrieval_Block");
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end Data_Retrieval_Block;
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end Data_Retrieval_Block;
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if not (Buffer.Handled_In_Body and -- Validate proper exception
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if not (Buffer.Handled_In_Body and -- Validate proper exception
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Buffer.Propagated_To_Caller and -- handling in entry bodies.
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Buffer.Propagated_To_Caller and -- handling in entry bodies.
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Buffer.Handled_In_Caller and
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Buffer.Handled_In_Caller and
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Handled_In_Caller)
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Handled_In_Caller)
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then
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then
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Report.Failed ("Improper exception handling by entry bodies");
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Report.Failed ("Improper exception handling by entry bodies");
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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 CB20004;
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end CB20004;
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