1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
-- 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;
|
