1/* 2 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: timer.c,v 1.7 2007/06/19 23:47:16 tbox Exp $ */ 19 20/*! \file */ 21 22#include <config.h> 23 24#include <isc/result.h> 25#include <isc/time.h> 26#include <isc/timer.h> 27 28#include <dns/types.h> 29#include <dns/timer.h> 30 31#define CHECK(op) \ 32 do { result = (op); \ 33 if (result != ISC_R_SUCCESS) goto failure; \ 34 } while (0) 35 36isc_result_t 37dns_timer_setidle(isc_timer_t *timer, unsigned int maxtime, 38 unsigned int idletime, isc_boolean_t purge) 39{ 40 isc_result_t result; 41 isc_interval_t maxinterval, idleinterval; 42 isc_time_t expires; 43 44 /* Compute the time of expiry. */ 45 isc_interval_set(&maxinterval, maxtime, 0); 46 CHECK(isc_time_nowplusinterval(&expires, &maxinterval)); 47 48 /* 49 * Compute the idle interval, and add a spare nanosecond to 50 * work around the silly limitation of the ISC timer interface 51 * that you cannot specify an idle interval of zero. 52 */ 53 isc_interval_set(&idleinterval, idletime, 1); 54 55 CHECK(isc_timer_reset(timer, isc_timertype_once, 56 &expires, &idleinterval, 57 purge)); 58 failure: 59 return (result); 60} 61