1/*	$NetBSD: timer.c,v 1.1 2024/02/18 20:57:34 christos Exp $	*/
2
3/*
4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
5 *
6 * SPDX-License-Identifier: MPL-2.0
7 *
8 * This Source Code Form is subject to the terms of the Mozilla Public
9 * License, v. 2.0. If a copy of the MPL was not distributed with this
10 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
11 *
12 * See the COPYRIGHT file distributed with this work for additional
13 * information regarding copyright ownership.
14 */
15
16/*! \file */
17
18#include <stdbool.h>
19
20#include <isc/result.h>
21#include <isc/time.h>
22#include <isc/timer.h>
23
24#include <dns/timer.h>
25#include <dns/types.h>
26
27#define CHECK(op)                            \
28	do {                                 \
29		result = (op);               \
30		if (result != ISC_R_SUCCESS) \
31			goto failure;        \
32	} while (0)
33
34isc_result_t
35dns_timer_setidle(isc_timer_t *timer, unsigned int maxtime,
36		  unsigned int idletime, bool purge) {
37	isc_result_t result;
38	isc_interval_t maxinterval, idleinterval;
39	isc_time_t expires;
40
41	/* Compute the time of expiry. */
42	isc_interval_set(&maxinterval, maxtime, 0);
43	CHECK(isc_time_nowplusinterval(&expires, &maxinterval));
44
45	/*
46	 * Compute the idle interval, and add a spare nanosecond to
47	 * work around the silly limitation of the ISC timer interface
48	 * that you cannot specify an idle interval of zero.
49	 */
50	isc_interval_set(&idleinterval, idletime, 1);
51
52	CHECK(isc_timer_reset(timer, isc_timertype_once, &expires,
53			      &idleinterval, purge));
54failure:
55	return (result);
56}
57