1 | /* |
2 | * Reset handlers. |
3 | * |
4 | * Copyright (c) 2003-2008 Fabrice Bellard |
5 | * Copyright (c) 2016 Red Hat, Inc. |
6 | * |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
8 | * of this software and associated documentation files (the "Software"), to deal |
9 | * in the Software without restriction, including without limitation the rights |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
11 | * copies of the Software, and to permit persons to whom the Software is |
12 | * furnished to do so, subject to the following conditions: |
13 | * |
14 | * The above copyright notice and this permission notice shall be included in |
15 | * all copies or substantial portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
23 | * THE SOFTWARE. |
24 | */ |
25 | |
26 | #include "qemu/osdep.h" |
27 | #include "qemu/queue.h" |
28 | #include "sysemu/reset.h" |
29 | |
30 | /* reset/shutdown handler */ |
31 | |
32 | typedef struct QEMUResetEntry { |
33 | QTAILQ_ENTRY(QEMUResetEntry) entry; |
34 | QEMUResetHandler *func; |
35 | void *opaque; |
36 | } QEMUResetEntry; |
37 | |
38 | static QTAILQ_HEAD(, QEMUResetEntry) reset_handlers = |
39 | QTAILQ_HEAD_INITIALIZER(reset_handlers); |
40 | |
41 | void qemu_register_reset(QEMUResetHandler *func, void *opaque) |
42 | { |
43 | QEMUResetEntry *re = g_malloc0(sizeof(QEMUResetEntry)); |
44 | |
45 | re->func = func; |
46 | re->opaque = opaque; |
47 | QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); |
48 | } |
49 | |
50 | void qemu_unregister_reset(QEMUResetHandler *func, void *opaque) |
51 | { |
52 | QEMUResetEntry *re; |
53 | |
54 | QTAILQ_FOREACH(re, &reset_handlers, entry) { |
55 | if (re->func == func && re->opaque == opaque) { |
56 | QTAILQ_REMOVE(&reset_handlers, re, entry); |
57 | g_free(re); |
58 | return; |
59 | } |
60 | } |
61 | } |
62 | |
63 | void qemu_devices_reset(void) |
64 | { |
65 | QEMUResetEntry *re, *nre; |
66 | |
67 | /* reset all devices */ |
68 | QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) { |
69 | re->func(re->opaque); |
70 | } |
71 | } |
72 | |
73 | |