timer.c revision 135446
1/* 2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and 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 1.2.206.1 2004/03/06 08:13:46 marka Exp $ */ 19 20#include <config.h> 21 22#include <isc/result.h> 23#include <isc/time.h> 24#include <isc/timer.h> 25 26#include <dns/types.h> 27#include <dns/timer.h> 28 29#define CHECK(op) \ 30 do { result = (op); \ 31 if (result != ISC_R_SUCCESS) goto failure; \ 32 } while (0) 33 34isc_result_t 35dns_timer_setidle(isc_timer_t *timer, unsigned int maxtime, 36 unsigned int idletime, isc_boolean_t purge) 37{ 38 isc_result_t result; 39 isc_interval_t maxinterval, idleinterval; 40 isc_time_t expires; 41 42 /* Compute the time of expiry. */ 43 isc_interval_set(&maxinterval, maxtime, 0); 44 CHECK(isc_time_nowplusinterval(&expires, &maxinterval)); 45 46 /* 47 * Compute the idle interval, and add a spare nanosecond to 48 * work around the silly limitation of the ISC timer interface 49 * that you cannot specify an idle interval of zero. 50 */ 51 isc_interval_set(&idleinterval, idletime, 1); 52 53 CHECK(isc_timer_reset(timer, isc_timertype_once, 54 &expires, &idleinterval, 55 purge)); 56 failure: 57 return (result); 58} 59