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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;