1-- C97112A.ADA
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-- CHECK THAT A DELAY STATEMENT IS ALLOWED IN THE SEQUENCE OF STATEMENTS
26-- OF A SELECT ALTERNATIVE OF A SELECTIVE WAIT CONTAINING A TERMINATE
27-- ALTERNATIVE OR AN ELSE PART.
28
29-- WRG 7/9/86
30
31with Impdef;
32WITH REPORT;   USE REPORT;
33WITH CALENDAR; USE CALENDAR;
34PROCEDURE C97112A IS
35
36     ACCEPT_ALTERNATIVE_TAKEN : BOOLEAN := FALSE;
37
38BEGIN
39
40     TEST ("C97112A", "CHECK THAT A DELAY STATEMENT IS ALLOWED IN " &
41                      "THE SEQUENCE OF STATEMENTS OF A SELECT " &
42                      "ALTERNATIVE OF A SELECTIVE WAIT CONTAINING A " &
43                      "TERMINATE ALTERNATIVE OR AN ELSE PART");
44
45     --------------------------------------------------
46
47  A: DECLARE
48
49          TASK T IS
50               ENTRY E;
51          END T;
52
53          TASK BODY T IS
54               BEFORE, AFTER : TIME;
55          BEGIN
56               SELECT
57                    ACCEPT E;
58                    ACCEPT_ALTERNATIVE_TAKEN := TRUE;
59                    BEFORE := CLOCK;
60                    DELAY 10.0 * Impdef.One_Second;
61                    AFTER  := CLOCK;
62                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN
63                         FAILED ("INSUFFICIENT DELAY (A)");
64                    END IF;
65               OR
66                    TERMINATE;
67               END SELECT;
68          END T;
69
70     BEGIN
71
72          T.E;
73
74     END A;
75
76     IF NOT ACCEPT_ALTERNATIVE_TAKEN THEN
77          FAILED ("ACCEPT ALTERNATIVE NOT TAKEN");
78     END IF;
79
80     --------------------------------------------------
81
82  B: DECLARE
83
84          TASK T IS
85               ENTRY E;
86          END T;
87
88          TASK BODY T IS
89               BEFORE, AFTER : TIME;
90          BEGIN
91               --ENSURE THAT E HAS BEEN CALLED BEFORE PROCEEDING:
92               WHILE E'COUNT = 0 LOOP
93                    DELAY 1.0 * Impdef.One_Second;
94               END LOOP;
95
96               SELECT
97                    ACCEPT E;
98                    BEFORE := CLOCK;
99                    DELAY 10.0 * Impdef.One_Second;
100                    AFTER  := CLOCK;
101                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN
102                         FAILED ("INSUFFICIENT DELAY (B-1)");
103                    END IF;
104               ELSE
105                    FAILED ("ELSE PART EXECUTED (B-1)");
106               END SELECT;
107
108               SELECT
109                    ACCEPT E;
110                    FAILED ("ACCEPT STATEMENT EXECUTED (B-2)");
111               ELSE
112                    BEFORE := CLOCK;
113                    DELAY 10.0 * Impdef.One_Second;
114                    AFTER  := CLOCK;
115                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN
116                         FAILED ("INSUFFICIENT DELAY (B-2)");
117                    END IF;
118               END SELECT;
119          EXCEPTION
120               WHEN OTHERS =>
121                    FAILED ("EXCEPTION RAISED");
122          END T;
123
124     BEGIN
125
126          T.E;
127
128     END B;
129
130     --------------------------------------------------
131
132     RESULT;
133
134END C97112A;
135