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author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- C974010.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 abortable part of an asynchronous select statement
28 -- is not started if the triggering statement is a task entry call to
29 -- a task that has already terminated.
30 --
31 -- Check that Tasking_Error is properly propagated to the asynchronous
32 -- select statement and thus the sequence of statements of the triggering
33 -- alternative is not executed after the abortable part is left.
34 --
35 -- Check that Tasking_Error is re-raised immediately following the
36 -- asynchronous select.
37 --
38 -- TEST DESCRIPTION:
39 --
40 -- Use a small subset of the base Automated Teller Machine simulation
41 -- which is shown in greater detail in other tests of this series.
42 -- Declare a main procedure containing an asynchronous select with a task
43 -- entry call as triggering statement. Ensure that the task is
44 -- terminated before the entry call. Use stripped down versions of
45 -- the called procedures to check the correct path in the test.
46 --
47 --
48 -- CHANGE HISTORY:
49 -- 06 Dec 94 SAIC ACVC 2.0
50 --
51 --!
52
53 package C974010_0 is -- Automated teller machine abstraction.
54
55
56 Transaction_Canceled : exception;
57
58 type Key_Enum is (None, Cancel, Deposit, Withdraw);
59
60 type Card_Number_Type is private;
61 type Card_PIN_Type is private;
62 type ATM_Card_Type is private;
63
64 task type ATM_Keyboard_Task is
65 entry Cancel_Pressed;
66 end ATM_Keyboard_Task;
67
68
69 procedure Validate_Card (Card : in ATM_Card_Type);
70
71 procedure Perform_Transaction (Card : in ATM_Card_Type);
72
73
74 private
75
76 type Card_Number_Type is range 1 .. 9999;
77 type Card_PIN_Type is range 100 .. 999;
78
79 type ATM_Card_Type is record
80 Number : Card_Number_Type;
81 PIN : Card_PIN_Type;
82 end record;
83
84 end C974010_0;
85
86
87 --==================================================================--
88
89
90 with Report;
91 package body C974010_0 is
92
93
94
95 -- One of these gets created as "Keyboard" for each transaction
96 --
97 task body ATM_Keyboard_Task is
98 TC_Suicide : exception;
99 Key_Pressed : Key_Enum := None;
100 begin
101 raise TC_Suicide; -- Simulate early, unexpected termination
102
103 accept Cancel_Pressed do -- queued entry call.
104 null; --:::: user code for cancel
105
106 end Cancel_Pressed;
107
108 exception
109 when TC_Suicide =>
110 null; -- This is the expected test behavior
111 when others =>
112 Report.Failed ("Unexpected Exception in ATM_Keyboard_Task");
113 end ATM_Keyboard_Task;
114
115 procedure Validate_Card (Card : in ATM_Card_Type) is
116 begin
117 Report.Failed ("Abortable part was executed");
118 end Validate_Card;
119
120
121 procedure Perform_Transaction (Card : in ATM_Card_Type) is
122 begin
123 Report.Failed ("Exception not re-raised immediately following " &
124 "asynchronous select");
125 end Perform_Transaction;
126
127
128 end C974010_0;
129
130
131 --==================================================================--
132
133
134 with Report;
135 with ImpDef;
136
137 with C974010_0; -- Automated teller machine abstraction.
138 use C974010_0;
139
140 procedure C974010 is
141
142 Card_Data : ATM_Card_Type;
143 TC_Tasking_Error_Handled : Boolean := false;
144
145 begin -- Main program.
146
147 Report.Test ("C974010", "Asynchronous Select: Trigger is a call to a " &
148 "task entry of a task that is already completed");
149
150
151 declare
152 -- Create the task for this transaction
153 Keyboard : C974010_0.ATM_Keyboard_Task;
154 begin
155
156 -- Ensure the task is already completed before calling
157 --
158 while not Keyboard'terminated loop
159 delay ImpDef.Minimum_Task_Switch;
160 end loop;
161
162 -- --
163 -- Asynchronous select is tested here --
164 -- --
165
166 select
167
168 Keyboard.Cancel_Pressed;
169
170 raise Transaction_Canceled; -- Should not be executed.
171
172 then abort
173
174 -- Since the triggering call is not queued the abortable part
175 -- should not be executed.
176 --
177 Validate_Card (Card_Data);
178
179 end select;
180 --
181 -- The propagated exception is re-raised here.
182
183 Perform_Transaction(Card_Data); -- Should not be reached.
184
185 exception
186 when Transaction_Canceled =>
187 Report.Failed ("Triggering alternative sequence of statements " &
188 "executed");
189 when Tasking_Error =>
190 -- This is the expected test path
191 TC_Tasking_Error_Handled := true;
192 when others =>
193 Report.Failed ("Wrong exception raised: ");
194 end;
195
196
197 if not TC_Tasking_Error_Handled then
198 Report.Failed ("Tasking_Error not properly propagated");
199 end if;
200
201 Report.Result;
202
203 exception
204 when Tasking_Error =>
205 Report.Failed ("Tasking_Error propagated to wrong handler");
206 Report.Result;
207
208
209 end C974010;