1-- C974007.A
2--
3--                             Grant of Unlimited Rights
4--
5--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
6--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7--     unlimited rights in the software and documentation contained herein.
8--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
9--     this public release, the Government intends to confer upon all
10--     recipients unlimited rights  equal to those held by the Government.
11--     These rights include rights to use, duplicate, release or disclose the
12--     released technical data and computer software in whole or in part, in
13--     any manner and for any purpose whatsoever, and to have or permit others
14--     to do so.
15--
16--                                    DISCLAIMER
17--
18--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
19--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
21--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
22--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
23--     PARTICULAR PURPOSE OF SAID MATERIAL.
24--*
25--
26-- OBJECTIVE:
27--      Check that the sequence of statements of the triggering alternative
28--      of an asynchronous select statement is not executed if the triggering
29--      statement is a protected entry call, and the entry is not accepted
30--      before the abortable part completes. Check that execution continues
31--      immediately following the asynchronous select.
32--
33-- TEST DESCRIPTION:
34--      Declare a main procedure containing an asynchronous select with a
35--      protected entry call as triggering statement. Declare a protected
36--      procedure which sets the protected entry's barrier true. Ensure
37--      that the entry call is never accepted by not calling the protected
38--      procedure; the barrier remains false, and the entry call from
39--      asynchronous select is queued. Since the abortable part will complete
40--      before the entry is accepted, the sequence of statements of the
41--      triggering alternative is never executed.
42--
43--
44-- CHANGE HISTORY:
45--      06 Dec 94   SAIC    ACVC 2.0
46--
47--!
48
49
50package C974007_0 is  -- Automated teller machine abstraction.
51
52
53   -- Flags for testing purposes:
54   --
55   Abortable_Part_Executed       : Boolean := False;
56   Perform_Transaction_Executed  : Boolean := False;
57   Triggering_Statement_Executed : Boolean := False;
58
59
60   type Key_Enum is (None, Cancel, Deposit, Withdraw);
61
62   type Card_Number_Type is private;
63   type Card_PIN_Type    is private;
64   type ATM_Card_Type    is private;
65
66
67   Transaction_Canceled : exception;
68
69
70   protected type ATM_Keyboard_Protected is
71      entry Cancel_Pressed;
72      procedure Read_Key;
73   private
74      Last_Key_Pressed : Key_Enum := None;
75   end ATM_Keyboard_Protected;
76
77
78   procedure Read_Card (Card : in out ATM_Card_Type);
79
80   procedure Validate_Card (Card : in ATM_Card_Type);
81
82   procedure Perform_Transaction (Card : in ATM_Card_Type);
83
84private
85
86   type Card_Number_Type is range   1 .. 9999;
87   type Card_PIN_Type    is range 100 ..  999;
88
89   type ATM_Card_Type is record
90      Number : Card_Number_Type;
91      PIN    : Card_PIN_Type;
92   end record;
93
94end C974007_0;
95
96
97     --==================================================================--
98
99
100with Report;
101package body C974007_0 is
102
103
104   protected body ATM_Keyboard_Protected is
105
106      -- Barrier is false for the live of the test
107      entry Cancel_Pressed when (Last_Key_Pressed = Cancel) is
108      begin
109      Triggering_Statement_Executed  := true;   -- Test has failed
110      -- (Note: cannot call Report.Failed in the protected entry body]
111      end Cancel_Pressed;
112
113      procedure Read_Key is                                     -- Never
114      begin                                                     -- called.
115         -- Simulate a procedure which reads user keyboard input, and
116         -- which is called by some interrupt handler.
117         Last_Key_Pressed := Cancel;
118      end Read_Key;
119
120   end ATM_Keyboard_Protected;
121
122
123   procedure Read_Card (Card : in out ATM_Card_Type) is
124   begin
125      Card.Number := 9999;
126      Card.PIN    := 111;
127   end Read_Card;
128
129
130   procedure Validate_Card (Card : in ATM_Card_Type) is
131   begin
132      Abortable_Part_Executed := True;
133   end Validate_Card;
134
135
136   procedure Perform_Transaction (Card : in ATM_Card_Type) is
137   begin
138      Perform_Transaction_Executed := True;
139   end Perform_Transaction;
140
141
142end C974007_0;
143
144
145     --==================================================================--
146with Report;
147
148with C974007_0;  -- Automated teller machine abstraction.
149use  C974007_0;
150
151procedure C974007 is
152
153   Card_Data : ATM_Card_Type;
154
155begin
156
157   Report.Test ("C974007", "ATC: trigger is protected entry call" &
158                              " and abortable part completes first");
159
160   Read_Card (Card_Data);
161
162   declare
163      Keyboard : C974007_0.ATM_Keyboard_Protected;
164   begin
165
166      --                                    --
167      -- Asynchronous select is tested here --
168      --                                    --
169
170      select
171         Keyboard.Cancel_Pressed;        -- Barrier is never set true, so
172                                         -- entry call is queued and never
173                                         -- accepted.
174
175         raise Transaction_Canceled;     -- Should not be executed.
176      then abort
177         Validate_Card (Card_Data);      -- This call completes before
178                                         -- Keyboard.Cancel_Pressed can be
179                                         -- accepted.
180      end select;
181      Perform_Transaction (Card_Data);   -- Execution proceeds here after
182                                         -- Validate_Card completes.
183   exception
184      when Transaction_Canceled =>
185         Report.Failed ("Triggering alternative sequence of statements " &
186                        "executed");
187   end;
188
189
190   if Triggering_Statement_Executed  then
191      Report.Failed ("Triggering statement was executed");
192   end if;
193
194   if not Abortable_Part_Executed then
195      Report.Failed ("Abortable part not executed");
196   end if;
197
198   if not Perform_Transaction_Executed then
199      Report.Failed ("Statements following asynchronous select not " &
200                     "executed");
201   end if;
202
203   Report.Result;
204
205end C974007;
206