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
35void
36isc_ondestroy_init(isc_ondestroy_t *ondest) {
37	ondest->magic = ONDESTROY_MAGIC;
38	ISC_LIST_INIT(ondest->events);
39}
40
41isc_result_t
42isc_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
65void
66isc_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
86