contrib/bind-9.5.2/lib/isc/ondestroy.c

   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: ondestroy.c,v 1.16 2007/06/19 23:47:17 tbox Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23
  24 #include <stddef.h>
  25
  26 #include <isc/event.h>
  27 #include <isc/magic.h>
  28 #include <isc/ondestroy.h>
  29 #include <isc/task.h>
  30 #include <isc/util.h>
  31
  32 #define ONDESTROY_MAGIC         ISC_MAGIC('D', 'e', 'S', 't')
  33 #define VALID_ONDESTROY(s)      ISC_MAGIC_VALID(s, ONDESTROY_MAGIC)
  34
  35 void
  36 isc_ondestroy_init(isc_ondestroy_t *ondest) {
  37         ondest->magic = ONDESTROY_MAGIC;
  38         ISC_LIST_INIT(ondest->events);
  39 }
  40
  41 isc_result_t
  42 isc_ondestroy_register(isc_ondestroy_t *ondest, isc_task_t *task,
  43                        isc_event_t **eventp)
  44 {
  45         isc_event_t *theevent;
  46         isc_task_t *thetask = NULL;
  47
  48         REQUIRE(VALID_ONDESTROY(ondest));
  49         REQUIRE(task != NULL);
  50         REQUIRE(eventp != NULL);
  51
  52         theevent = *eventp;
  53
  54         REQUIRE(theevent != NULL);
  55
  56         isc_task_attach(task, &thetask);
  57
  58         theevent->ev_sender = thetask;
  59
  60         ISC_LIST_APPEND(ondest->events, theevent, ev_link);
  61
  62         return (ISC_R_SUCCESS);
  63 }
  64
  65 void
  66 isc_ondestroy_notify(isc_ondestroy_t *ondest, void *sender) {
  67         isc_event_t *eventp;
  68         isc_task_t *task;
  69
  70         REQUIRE(VALID_ONDESTROY(ondest));
  71
  72         eventp = ISC_LIST_HEAD(ondest->events);
  73         while (eventp != NULL) {
  74                 ISC_LIST_UNLINK(ondest->events, eventp, ev_link);
  75
  76                 task = eventp->ev_sender;
  77                 eventp->ev_sender = sender;
  78
  79                 isc_task_sendanddetach(&task, &eventp);
  80
  81                 eventp = ISC_LIST_HEAD(ondest->events);
  82         }
  83 }
  84
  85