external/bsd/bind/dist/lib/dns/timer.c

   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 }