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-- CA13001.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
-- Check that a separate protected unit declared in a non-generic child
-- unit of a private parent have the same visibility into its parent,
-- its siblings, and packages on which its parent depends as is available
-- at the point of their declaration.
--
-- TEST DESCRIPTION:
-- A scenario is created that demonstrates the potential of having all
-- members of one family to take out a transportation. The restriction
-- is depend on each member to determine who can get a car, a clunker,
-- or a bicycle. If no transportation is available, that member has to
-- walk.
--
-- Declare a package with location for each family member. Declare
-- a public parent package. Declare a private child package. Declare a
-- public grandchild of this private package. Declare a protected unit
-- as a subunit in a public grandchild package. This subunit has
-- visibility into it's parent body ancestor and its sibling.
--
-- Declare another public parent package. The body of this package has
-- visibility into its private sibling's descendants.
--
-- In the main program, "with"s the parent package. Check that the
-- protected subunit performs as expected.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
-- 16 Nov 95 SAIC Update and repair for ACVC 2.0.1
--
--!
package CA13001_0 is
type Location is (School, Work, Beach, Home);
type Family is (Father, Mother, Teen);
Destination : array (Family) of Location;
-- Other type definitions and procedure declarations in real application.
end CA13001_0;
-- No bodies required for CA13001_0.
--==================================================================--
-- Public parent.
package CA13001_1 is
type Transportation is (Bicycle, Clunker, New_Car);
type Key_Type is private;
Walking : boolean := false;
-- Other type definitions and procedure declarations in real application.
private
type Key_Type
is range Transportation'pos(Bicycle) .. Transportation'pos(New_Car);
end CA13001_1;
-- No bodies required for CA13001_1.
--==================================================================--
-- Private child.
private package CA13001_1.CA13001_2 is
type Transport is
record
In_Use : boolean := false;
end record;
Vehicles : array (Transportation) of Transport;
-- Other type definitions and procedure declarations in real application.
end CA13001_1.CA13001_2;
-- No bodies required for CA13001_1.CA13001_2.
--==================================================================--
-- Public grandchild of a private parent.
package CA13001_1.CA13001_2.CA13001_3 is
Flat_Tire : array (Transportation) of boolean := (others => false);
-- Other type definitions and procedure declarations in real application.
end CA13001_1.CA13001_2.CA13001_3;
-- No bodies required for CA13001_1.CA13001_2.CA13001_3.
--==================================================================--
-- Context clauses required for visibility needed by a separate subunit.
with CA13001_0;
use CA13001_0;
-- Public grandchild of a private parent.
package CA13001_1.CA13001_2.CA13001_4 is
type Transit is
record
Available : boolean := false;
end record;
type Keys_Array is array (Transportation) of Transit;
Fuel : array (Transportation) of boolean := (others => true);
protected Family_Transportation is
procedure Get_Vehicle (Who : in Family;
Key : out Key_Type);
procedure Return_Vehicle (Tr : in Transportation);
function TC_Verify (What : Transportation) return boolean;
private
Keys : Keys_Array;
end Family_Transportation;
end CA13001_1.CA13001_2.CA13001_4;
--==================================================================--
-- Context clause required for visibility needed by a separate subunit.
with CA13001_1.CA13001_2.CA13001_3; -- Public sibling.
package body CA13001_1.CA13001_2.CA13001_4 is
protected body Family_Transportation is separate;
end CA13001_1.CA13001_2.CA13001_4;
--==================================================================--
separate (CA13001_1.CA13001_2.CA13001_4)
protected body Family_Transportation is
procedure Get_Vehicle (Who : in Family;
Key : out Key_Type) is
begin
case Who is
when Father|Mother =>
-- Drive new car to work
-- Reference package with'ed by the subunit parent's body.
if Destination(Who) = Work then
-- Reference type declared in the private parent of the subunit
-- parent's body.
-- Reference type declared in the visible part of the
-- subunit parent's body.
if not Vehicles(New_Car).In_Use and Fuel(New_Car)
-- Reference type declared in the public sibling of the
-- subunit parent's body.
and not CA13001_1.CA13001_2.CA13001_3.Flat_Tire(New_Car) then
Vehicles(New_Car).In_Use := true;
-- Reference type declared in the private part of the
-- protected subunit.
Keys(New_Car).Available := false;
Key := Transportation'pos(New_Car);
else
-- Reference type declared in the grandparent of the subunit
-- parent's body.
Walking := true;
end if;
-- Drive clunker to other destinations.
else
if not Vehicles(Clunker).In_Use and Fuel(Clunker) and not
CA13001_1.CA13001_2.CA13001_3.Flat_Tire(Clunker) then
Vehicles(Clunker).In_Use := true;
Keys(Clunker).Available := false;
Key := Transportation'pos(Clunker);
else
Walking := true;
Key := Transportation'pos(Bicycle);
end if;
end if;
-- Similar for Teen.
when Teen =>
if not Vehicles(Clunker).In_Use and Fuel(Clunker) and not
CA13001_1.CA13001_2.CA13001_3.Flat_Tire(Clunker) then
Vehicles(Clunker).In_Use := true;
Keys(Clunker).Available := false;
Key := Transportation'pos(Clunker);
else
Walking := true;
Key := Transportation'pos(Bicycle);
end if;
end case;
end Get_Vehicle;
----------------------------------------------------------------
-- Any family member can bring back the transportation with the key.
procedure Return_Vehicle (Tr : in Transportation) is
begin
Vehicles(Tr).In_Use := false;
Keys(Tr).Available := true;
end Return_Vehicle;
----------------------------------------------------------------
function TC_Verify (What : Transportation) return boolean is
begin
return Keys(What).Available;
end TC_Verify;
end Family_Transportation;
--==================================================================--
with CA13001_0;
use CA13001_0;
-- Public child.
package CA13001_1.CA13001_5 is
-- In a real application, tasks could be used to demonstrate
-- a family transportation scenario, i.e., each member of
-- a family can take a vehicle out concurrently, then return
-- them at the same time. For the purposes of the test, family
-- transportation happens sequentially.
procedure Provide_Transportation (Who : in Family;
Get_Key : out Key_Type;
Get_Veh : out boolean);
procedure Return_Transportation (What : in Transportation;
Rt_Veh : out boolean);
end CA13001_1.CA13001_5;
--==================================================================--
with CA13001_1.CA13001_2.CA13001_4; -- Public grandchild of a private parent,
-- implicitly with CA13001_1.CA13001_2.
package body CA13001_1.CA13001_5 is
package Transportation_Pkg renames CA13001_1.CA13001_2.CA13001_4;
use Transportation_Pkg;
-- These two validation subprograms provide the capability to check the
-- components defined in the private packages from within the client
-- program.
procedure Provide_Transportation (Who : in Family;
Get_Key : out Key_Type;
Get_Veh : out boolean) is
begin
-- Goto work, school, or to the beach.
Family_Transportation.Get_Vehicle (Who, Get_Key);
if not Family_Transportation.TC_Verify
(Transportation'Val(Get_Key)) then
Get_Veh := true;
else
Get_Veh := false;
end if;
end Provide_Transportation;
----------------------------------------------------------------
procedure Return_Transportation (What : in Transportation;
Rt_Veh : out boolean) is
begin
Family_Transportation.Return_Vehicle (What);
if Family_Transportation.TC_Verify(What) and
not CA13001_1.CA13001_2.Vehicles(What).In_Use then
Rt_Veh := true;
else
Rt_Veh := false;
end if;
end Return_Transportation;
end CA13001_1.CA13001_5;
--==================================================================--
with CA13001_0;
with CA13001_1.CA13001_5; -- Implicitly with parent, CA13001_1.
with Report;
procedure CA13001 is
Mommy : CA13001_0.Family := CA13001_0.Mother;
Daddy : CA13001_0.Family := CA13001_0.Father;
BG : CA13001_0.Family := CA13001_0.Teen;
BG_Clunker : CA13001_1.Transportation := CA13001_1.Clunker;
Get_Key : CA13001_1.Key_Type;
Get_Transit : boolean := false;
Return_Transit : boolean := false;
begin
Report.Test ("CA13001", "Check that a protected subunit declared in " &
"a child unit of a private parent have the same visibility " &
"into its parent, its parent's siblings, and packages on " &
"which its parent depends");
-- Get transportation for mother to go to work.
CA13001_0.Destination(CA13001_0.Mother) := CA13001_0.Work;
CA13001_1.CA13001_5.Provide_Transportation (Mommy, Get_Key, Get_Transit);
if not Get_Transit then
Report.Failed ("Failed to get mother transportation");
end if;
-- Get transportation for teen to go to school.
CA13001_0.Destination(CA13001_0.Teen) := CA13001_0.School;
Get_Transit := false;
CA13001_1.CA13001_5.Provide_Transportation (BG, Get_Key, Get_Transit);
if not Get_Transit then
Report.Failed ("Failed to get teen transportation");
end if;
-- Get transportation for father to go to the beach.
CA13001_0.Destination(CA13001_0.Father) := CA13001_0.Beach;
Get_Transit := false;
CA13001_1.CA13001_5.Provide_Transportation (Daddy, Get_Key, Get_Transit);
if Get_Transit and not CA13001_1.Walking then
Report.Failed ("Failed to make daddy to walk to the beach");
end if;
-- Return the clunker.
CA13001_1.CA13001_5.Return_Transportation (BG_Clunker, Return_Transit);
if not Return_Transit then
Report.Failed ("Failed to get back the clunker");
end if;
Report.Result;
end CA13001;
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