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1 /* $NetBSD: t_randomid.c,v 1.3 2011/07/07 09:49:59 jruoho Exp $ */
2
3 /*-
4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28
29 #include <atf-c.h>
30
31 #include <sys/types.h>
32
33 #include <assert.h>
34 #include <inttypes.h>
35 #include <randomid.h>
36 #include <stdio.h>
37 #include <string.h>
38
39 #define PERIOD          30000
40
41 uint64_t last[65536];
42
43 ATF_TC(randomid_basic);
44 ATF_TC_HEAD(randomid_basic, tc)
45 {
46
47         atf_tc_set_md_var(tc, "descr", "Check randomid(3)");
48 }
49
50 ATF_TC_BODY(randomid_basic, tc)
51 {
52         static randomid_t ctx = NULL;
53         uint64_t lowest, n, diff;
54         uint16_t id;
55
56         memset(last, 0, sizeof(last));
57         ctx = randomid_new(16, (long)3600);
58
59         lowest = UINT64_MAX;
60
61         for (n = 0; n < 1000000; n++) {
62                 id = randomid(ctx);
63
64                 if (last[id] > 0) {
65                         diff = n - last[id];
66
67                         if (diff <= lowest) {
68                                 if (lowest != UINT64_MAX)
69                                         printf("id %5d: last call at %9"PRIu64
70                                             ", current call %9"PRIu64
71                                             " (diff %5"PRIu64"), "
72                                             "lowest %"PRIu64"\n",
73                                             id, last[id], n, diff, lowest);
74
75                                 ATF_REQUIRE_MSG(diff >= PERIOD,
76                                     "diff (%"PRIu64") less than minimum "
77                                     "period (%d)", diff, PERIOD);
78
79                                 lowest = diff;
80                         }
81                 }
82
83                 last[id] = n;
84         }
85 }
86
87 ATF_TP_ADD_TCS(tp)
88 {
89
90         ATF_TP_ADD_TC(tp, randomid_basic);
91
92         return atf_no_error();
93 }