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-- C940012.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 protected object can have discriminants
--
-- TEST DESCRIPTION:
-- Use a subset of the simulation of the freeway on-ramp described in
-- c940005. In this case an array of access types is built with pointers
-- to successive ramps. Each ramp has its Ramp_Number specified by
-- discriminant and this corresponds to the index in the array. The test
-- checks that the ramp numbers are assigned as expected then uses calls
-- to procedures within the objects (ramps) to verify external calls to
-- ensure the structures are valid. The external references within the
-- protected objects are made via the index into the array. Routines
-- which refer to the "previous" ramp and the "next" ramp are exercised.
-- (Note: The first and last ramps are assumed to be dummies and no
-- first/last condition code is included)
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
with Report;
procedure C940012 is
type Ramp_Index is range 1..4;
type Ramp;
type a_Ramp is access Ramp;
Ramp_Array : array (Ramp_Index) of a_Ramp;
-- Weighted load given to each potential problem area and accumulated
type Load_Factor is range 0..8;
Clear_Level : constant Load_Factor := 0;
Moderate_Level : constant Load_Factor := 3;
--================================================================
-- Only the Routines that are used in this test are shown
--
protected type Ramp (Ramp_In : Ramp_Index) is
function Ramp_Number return Ramp_Index;
function Local_Overload return Load_Factor;
function Next_Ramp_Overload return Load_Factor;
procedure Set_Local_Overload(Sensor_Level : Load_Factor);
procedure Notify;
private
Next_Ramp_Alert : Boolean := false; -- Next Ramp is in trouble?
-- Current state of the various Sample Points
Local_State : Load_Factor := Clear_Level;
end Ramp;
--================================================================
protected body Ramp is
function Ramp_Number return Ramp_Index is
begin
return Ramp_In;
end Ramp_Number;
-- These Set/Clear routines are triggered by real-time sensors that
-- reflect traffic state
procedure Set_Local_Overload(Sensor_Level : Load_Factor) is
begin
if Local_State = Clear_Level then
-- Notify "previous" ramp to check this one for current state.
-- Subsequent changes in state will not send an alert
-- When the situation clears another routine performs the
-- all_clear notification. (not shown)
Ramp_Array(Ramp_In - 1).Notify; -- index to previous ramp
end if;
Local_State := Sensor_Level;
null; --::::: Start local meter if not already started
end;
function Local_Overload return Load_Factor is
begin
return Local_State;
end Local_Overload;
-- This is notification from the next ramp that it is in
-- overload. With this provision we only need to sample the next
-- ramp during adverse conditions.
procedure Notify is
begin
Next_Ramp_Alert := true;
end Notify;
function Next_Ramp_Overload return Load_Factor is
begin
if Next_Ramp_Alert then
-- Get next ramp's current state
return Ramp_Array(Ramp_In + 1).Local_Overload;
else
return Clear_Level;
end if;
end Next_Ramp_Overload;
end Ramp;
--================================================================
begin
Report.Test ("C940012", "Check that a protected object " &
"can have discriminants");
-- Build the ramps and populate the ramp array
for i in Ramp_Index loop
Ramp_Array(i) := new Ramp (i);
end loop;
-- Test driver. This is ALL test control code
-- Check the assignment of the index
for i in Ramp_Index loop
if Ramp_Array(i).Ramp_Number /= i then
Report.Failed ("Ramp_Number assignment incorrect");
end if;
end loop;
-- Simulate calls to the protected functions and procedures
-- external calls. (do not call the "dummy" end ramps)
-- Simple Call
if Ramp_Array(2).Next_Ramp_Overload /= Clear_level then
Report.Failed ("Primary call incorrect");
end if;
-- Call which results in an external procedure call via the array
-- index from within the protected object
Ramp_Array(3).Set_Local_Overload (Moderate_Level);
-- Call which results in an external function call via the array
-- index from within the protected object
if Ramp_Array(2).Next_Ramp_Overload /= Moderate_level then
Report.Failed ("Secondary call incorrect");
end if;
Report.Result;
end C940012;
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