1-- C97120B.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 IF A SPECIFIED DELAY IS ZERO OR NEGATIVE AND AN ENTRY CALL
26-- IS WAITING AT AN OPEN ALTERNATIVE WHEN THE SELECTIVE WAIT IS
27-- EXECUTED, THE CALL IS ACCEPTED.
28
29-- WRG 7/11/86
30
31with Impdef;
32WITH REPORT; USE REPORT;
33PROCEDURE C97120B IS
34
35     ZERO, NEG : DURATION := 1.0;
36
37BEGIN
38
39     TEST ("C97120B", "CHECK THAT IF A SPECIFIED DELAY IS ZERO OR " &
40                      "NEGATIVE AND AN ENTRY CALL IS WAITING AT AN " &
41                      "OPEN ALTERNATIVE WHEN THE SELECTIVE WAIT IS " &
42                      "EXECUTED, THE CALL IS ACCEPTED");
43
44     IF EQUAL (3, 3) THEN
45          ZERO :=  0.0;
46          NEG  := -1.0;
47     END IF;
48
49     DECLARE
50
51          TASK T IS
52               ENTRY E;
53          END T;
54
55          TASK BODY T IS
56          BEGIN
57               WHILE E'COUNT = 0 LOOP
58                    DELAY 1.0 * Impdef.One_Second;
59               END LOOP;
60
61            A: BEGIN
62                    SELECT
63                         WHEN IDENT_BOOL (TRUE) =>
64                              ACCEPT E;
65                    OR
66                         DELAY ZERO * Impdef.One_Second;
67                         FAILED ("ZERO DELAY ALTERNATIVE TAKEN");
68                         ACCEPT E;
69                    END SELECT;
70               EXCEPTION
71                    WHEN OTHERS =>
72                         FAILED ("EXCEPTION RAISED (A)");
73               END A;
74
75               WHILE E'COUNT = 0 LOOP
76                    DELAY 1.0 * Impdef.One_Second;
77               END LOOP;
78
79            B: BEGIN
80                    SELECT
81                         ACCEPT E;
82                    OR
83                         DELAY NEG;
84                         FAILED ("NEGATIVE DELAY ALTERNATIVE TAKEN");
85                         ACCEPT E;
86                    END SELECT;
87               EXCEPTION
88                    WHEN OTHERS =>
89                         FAILED ("EXCEPTION RAISED (B)");
90               END B;
91
92          END T;
93
94     BEGIN
95
96          T.E;
97          T.E;
98
99     END;
100
101     RESULT;
102
103END C97120B;
104