1-- C910001.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 tasks may have discriminants.  Specifically, check where
28--      the subtype of the discriminant is a discrete subtype and where it is
29--      an access subtype.  Check the case where the default values of the
30--      discriminants are used.
31--
32-- TEST DESCRIPTION:
33--      A task is defined with two discriminants, one a discrete subtype and
34--      another that is an access subtype.  Tasks are created with various
35--      values for discriminants and code within the task checks that these
36--      are passed in correctly.  One instance of a default is used.  The
37--      values passed to the task as the discriminants are taken from an
38--      array of test data and the values received are checked against the
39--      same array.
40--
41--
42-- CHANGE HISTORY:
43--      06 Dec 94   SAIC    ACVC 2.0
44--
45--!
46
47with Report;
48
49procedure C910001 is
50
51
52   type App_Priority is range 1..10;
53   Default_Priority : App_Priority := 5;
54
55   type Message_ID is range 1..10_000;
56
57   type TC_Number_of_Messages is range 1..5;
58
59   type TC_rec is record
60      TC_ID       : Message_ID;
61      A_Priority  : App_Priority;
62      TC_Checked  : Boolean;
63   end record;
64
65   -- This table is used to create the messages and to check them
66   TC_table : array (1..TC_Number_of_Messages'Last) of TC_Rec :=
67                              (  ( 10, 6, false ),
68                                 ( 20, 2, false ),
69                                 ( 30, 9, false ),
70                                 ( 40, 1, false ),
71                                 ( 50, Default_Priority, false ) );
72
73begin -- C910001
74
75   Report.Test ("C910001", "Check that tasks may have discriminants");
76
77
78   declare     -- encapsulate the test
79
80      type Transaction_Record is
81         record
82            ID               : Message_ID;
83            Account_Number   : integer := 0;
84            Stock_Number     : integer := 0;
85            Quantity         : integer := 0;
86            Return_Value     : integer := 0;
87         end record;
88      --
89      type acc_Transaction_Record is access Transaction_Record;
90
91
92      task type Message_Task
93                   (In_Message  : acc_Transaction_Record := null;
94                    In_Priority : App_Priority := Default_Priority) is
95         entry Start;
96      end Message_Task;
97      type acc_Message_Task is access Message_Task;
98      --
99      --
100      task body Message_Task is
101         This_Message   : acc_Transaction_Record := In_Message;
102         This_Priority  : App_Priority           := In_Priority;
103         TC_Match_Found : Boolean                := false;
104      begin
105         accept Start;
106         -- In the example envisioned this task would then queue itself
107         -- upon some Distributor task which would send it off (requeue) to
108         -- the message processing tasks according to the priority of the
109         -- message and the current load on the system.  For the test we
110         -- just verify the data passed in as discriminants and exit the task
111         --
112         -- Check for the special case of default discriminants
113         if This_Message = null then
114            -- The default In_Message has been passed, check that the
115            -- default priority was also passed
116            if This_Priority /= Default_Priority then
117               Report.Failed ("Incorrect Default Priority");
118            end if;
119            if TC_Table (TC_Number_of_Messages'Last).TC_Checked then
120               Report.Failed ("Duplicate Default messages");
121            else
122               -- Mark that default has been seen
123               TC_Table (TC_Number_of_Messages'Last).TC_Checked := True;
124            end if;
125            TC_Match_Found := true;
126         else
127            -- Check the data against the table
128            for i in TC_Number_of_Messages loop
129               if TC_Table(i).TC_ID = This_Message.ID then
130                  -- this is the right slot in the table
131                  if TC_Table(i).TC_checked then
132                     -- Already checked
133                     Report.Failed ("Duplicate Data");
134                  else
135                     TC_Table(i).TC_checked := true;
136                  end if;
137                  TC_Match_Found := true;
138                  if TC_Table(i).A_Priority /= This_Priority then
139                     Report.Failed ("ID/Priority mismatch");
140                  end if;
141                  exit;
142               end if;
143            end loop;
144         end if;
145
146         if not TC_Match_Found then
147            Report.Failed ("No ID match in table");
148         end if;
149
150         -- Allow the task to terminate
151
152      end Message_Task;
153
154
155      -- The Line Driver task accepts data from an external source and
156      -- builds them into a transaction record.  It then generates a
157      -- message task.  This message "contains" the record and is given
158      -- a priority according to the contents of the message.  The priority
159      -- and transaction records are passed to the task as discriminants.
160      --    In this test we use a dummy record.  Only the ID is of interest
161      --    so we pick that and the required priority from an array of
162      --    test data.  We artificially limit the endless driver-loop to
163      --    the number of messages required for the test and add a special
164      --    case to check the defaults.
165      --
166      task Driver_Task;
167      --
168      task body Driver_Task is
169      begin
170
171         -- Create all but one of the required tasks
172         --
173         for i in 1..TC_Number_of_Messages'Last - 1   loop
174            declare
175               -- Create a record for the next message
176               Next_Transaction : acc_Transaction_Record :=
177                                                new Transaction_Record;
178               -- Create a task for the next message
179               Next_Message_Task : acc_Message_Task :=
180                                 new Message_Task( Next_Transaction,
181                                                   TC_Table(i).A_Priority );
182
183            begin
184               -- Artificially plug the ID with the next from the table
185               --    In reality the whole record would be built here
186               Next_Transaction.ID := TC_Table(i).TC_ID;
187
188               -- Ensure the task does not start executing till the
189               -- transaction record is properly constructed
190               Next_Message_Task.Start;
191
192            end;  -- declare
193         end loop;
194
195         -- For this subtest create one task with the default discriminants
196         --
197         declare
198
199            -- Create the task
200            Next_Message_Task : acc_Message_Task := new Message_Task;
201
202         begin
203
204            Next_Message_Task.Start;
205
206         end; -- declare
207
208
209      end Driver_Task;
210
211   begin
212      null;
213   end;     -- encapsulation
214
215   -- Now verify that all the tasks executed and checked in
216   for i in TC_Number_of_Messages loop
217      if not TC_Table(i).TC_Checked then
218         Report.Failed
219                 ("Task" & integer'image(integer (i) ) & " did not verify");
220      end if;
221   end loop;
222   Report.Result;
223
224end C910001;
225