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-- C940006.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 the body of a protected function can have external calls
-- to other protected functions and that the body of a protected
-- procedure can have external calls to protected procedures and to
-- protected functions.
--
-- TEST DESCRIPTION:
-- Use a subset of the simulation of the freeway on-ramp described in
-- c940005. In this case two protected objects are used but only a
-- minimum of routines are shown in each. Both objects are hard coded
-- and detail two adjacent on-ramps (Ramp_31 & Ramp_32) with routines in
-- each which use external calls to the other.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
with Report;
procedure C940006 is
begin
Report.Test ("C940006", "Check external calls of protected functions" &
" and procedures");
declare -- encapsulate the test
-- Weighted load given to each potential problem area and accumulated
type Load_Factor is range 0..8;
--
Clear_Level : constant Load_Factor := 0;
Minimum_Level : constant Load_Factor := 1;
Moderate_Level : constant Load_Factor := 3;
Serious_Level : constant Load_Factor := 4;
Critical_Level : constant Load_Factor := 6;
--================================================================
-- Only the Routines that are used in this test are shown
--
protected Ramp_31 is
function Local_Overload return Load_Factor;
procedure Set_Local_Overload(Sensor_Level : Load_Factor);
procedure Notify;
function Next_Ramp_Overload return Load_Factor;
function Freeway_Overload return Load_Factor;
procedure Downstream_Ramps;
function Get_DSR_Accumulate return Load_Factor;
private
Next_Ramp_Alert : Boolean := false; -- Next Ramp is in trouble?
-- Current state of the various Sample Points
Local_State : Load_Factor := Clear_Level;
-- Accumulated load for next three downstream ramps
DSR_Accumulate : Load_Factor := Clear_Level;
end Ramp_31;
--================================================================
-- Only the Routines that are used in this test are shown
--
protected Ramp_32 is
function Local_Overload return Load_Factor;
procedure Set_Local_Overload (Sensor_Level : Load_Factor);
private
Local_State : Load_Factor := Clear_Level;
end Ramp_32;
--================================================================
protected body Ramp_31 is
-- These Set/Clear routines are triggered by real-time sensors that
-- reflect traffic state
procedure Set_Local_Overload (Sensor_Level : Load_Factor) is
begin
-- Notify "previous" ramp to check this one for current state.
-- Subsequent changes in state will not send an alert
null; --::::: (see Ramp_32 for this code)
Local_State := Sensor_Level;
null; --::::: Start local meter if not already started
end Set_Local_Overload;
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
-- EXTERNAL FUNCTION CALL FROM FUNCTION
-- Get next ramp's current state
return Ramp_32.Local_Overload;
else
return Clear_Level;
end if;
end Next_Ramp_Overload;
-- return the summation of all the load factors
function Freeway_Overload return Load_Factor is
begin
return Local_Overload
-- + :::: others
+ Next_Ramp_Overload;
end Freeway_Overload;
-- Snapshot the states of the next three downstream ramps
procedure Downstream_Ramps is
begin
DSR_Accumulate := Ramp_32.Local_Overload; -- EXTERNAL FUNCTION
-- :::: + Ramp_33.Local_Overload -- FROM PROCEDURE
-- :::: + Ramp_34.Local_Overload
end Downstream_Ramps;
-- Get last snapshot
function Get_DSR_Accumulate return Load_Factor is
begin
return DSR_Accumulate;
end Get_DSR_Accumulate;
end Ramp_31;
--================================================================
protected body Ramp_32 is
function Local_Overload return Load_Factor is
begin
return Local_State;
end;
-- 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)
-- EXTERNAL CALL OF PROCEDURE FROM PROCEDURE
Ramp_31.Notify;
end if;
Local_State := Sensor_Level;
null; --::::: Start local meter if not already started
end;
end Ramp_32;
--================================================================
begin -- declare
-- Test driver. This is ALL test control code
-- Simulate calls to the protected functions and procedures
-- from without the protected object, these will, in turn make the
-- external calls.
-- Check initial conditions, exercising the simple calls
if not (Ramp_31.Local_Overload = Clear_Level and
Ramp_31.Next_Ramp_Overload = Clear_Level and
Ramp_31.Freeway_Overload = Clear_Level) and
Ramp_32.Local_Overload = Clear_Level then
Report.Failed ("Initial Calls provided unexpected Results");
end if;
-- Simulate real-time sensors reporting overloads at a hardware level
Ramp_31.Set_Local_Overload (1);
Ramp_32.Set_Local_Overload (3);
Ramp_31.Downstream_Ramps; -- take the current snapshot
if not (Ramp_31.Local_Overload = Minimum_Level and
Ramp_31.Get_DSR_Accumulate = Moderate_Level and
Ramp_31.Freeway_Overload = Serious_Level) then
Report.Failed ("Secondary Calls provided unexpected Results");
end if;
end; -- declare
Report.Result;
end C940006;
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