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
isc_ondestroy_init(isc_ondestroy_t * ondest)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
isc_ondestroy_register(isc_ondestroy_t * ondest,isc_task_t * task,isc_event_t ** eventp)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
isc_ondestroy_notify(isc_ondestroy_t * ondest,void * sender)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
86