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/* $NetBSD: t_randomid.c,v 1.5 2015/03/07 09:59:15 isaki Exp $ */
/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <atf-c.h>
#include <sys/types.h>
#include <assert.h>
#include <inttypes.h>
#include <randomid.h>
#include <stdio.h>
#include <string.h>
#define PERIOD 30000
uint32_t last[65536];
ATF_TC(randomid_basic);
ATF_TC_HEAD(randomid_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "Check randomid(3)");
}
ATF_TC_BODY(randomid_basic, tc)
{
static randomid_t ctx = NULL;
uint32_t lowest, n, diff;
uint16_t id;
memset(last, 0, sizeof(last));
ctx = randomid_new(16, (long)3600);
lowest = UINT32_MAX;
for (n = 0; n < 100000; n++) {
id = randomid(ctx);
if (last[id] > 0) {
diff = n - last[id];
if (diff <= lowest) {
if (lowest != UINT32_MAX)
printf("id %5d: last call at %9"PRIu32
", current call %9"PRIu32
" (diff %5"PRIu32"), "
"lowest %"PRIu32"\n",
id, last[id], n, diff, lowest);
ATF_REQUIRE_MSG(diff >= PERIOD,
"diff (%"PRIu32") less than minimum "
"period (%d)", diff, PERIOD);
lowest = diff;
}
}
last[id] = n;
}
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, randomid_basic);
return atf_no_error();
}
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