1 /* $NetBSD: timer.c,v 1.4 2014/12/10 04:37:58 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2000, 2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: timer.c,v 1.7 2007/06/19 23:47:16 tbox Exp */ 21 22 /*! \file */ 23 24 #include <config.h> 25 26 #include <isc/result.h> 27 #include <isc/time.h> 28 #include <isc/timer.h> 29 30 #include <dns/types.h> 31 #include <dns/timer.h> 32 33 #define CHECK(op) \ 34 do { result = (op); \ 35 if (result != ISC_R_SUCCESS) goto failure; \ 36 } while (/*CONSTCOND*/0) 37 38 isc_result_t 39 dns_timer_setidle(isc_timer_t *timer, unsigned int maxtime, 40 unsigned int idletime, isc_boolean_t purge) 41 { 42 isc_result_t result; 43 isc_interval_t maxinterval, idleinterval; 44 isc_time_t expires; 45 46 /* Compute the time of expiry. */ 47 isc_interval_set(&maxinterval, maxtime, 0); 48 CHECK(isc_time_nowplusinterval(&expires, &maxinterval)); 49 50 /* 51 * Compute the idle interval, and add a spare nanosecond to 52 * work around the silly limitation of the ISC timer interface 53 * that you cannot specify an idle interval of zero. 54 */ 55 isc_interval_set(&idleinterval, idletime, 1); 56 57 CHECK(isc_timer_reset(timer, isc_timertype_once, 58 &expires, &idleinterval, 59 purge)); 60 failure: 61 return (result); 62 } 63