module.c revision 6731cf52901064b55e19bae60ade2ccb5f69829c 
1/*
2 * QEMU Module Infrastructure
3 *
4 * Copyright IBM, Corp. 2009
5 *
6 * Authors:
7 *  Anthony Liguori   <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2.  See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
14 */
15
16#include "qemu-common.h"
17#include "qemu/queue.h"
18#include "qemu/module.h"
19
20typedef struct ModuleEntry
21{
22    void (*init)(void);
23    QTAILQ_ENTRY(ModuleEntry) node;
24} ModuleEntry;
25
26typedef QTAILQ_HEAD(, ModuleEntry) ModuleTypeList;
27
28static ModuleTypeList init_type_list[MODULE_INIT_MAX];
29
30static void init_types(void)
31{
32    static int inited;
33    int i;
34
35    if (inited) {
36        return;
37    }
38
39    for (i = 0; i < MODULE_INIT_MAX; i++) {
40        QTAILQ_INIT(&init_type_list[i]);
41    }
42
43    inited = 1;
44}
45
46
47static ModuleTypeList *find_type(module_init_type type)
48{
49    ModuleTypeList *l;
50
51    init_types();
52
53    l = &init_type_list[type];
54
55    return l;
56}
57
58void register_module_init(void (*fn)(void), module_init_type type)
59{
60    ModuleEntry *e;
61    ModuleTypeList *l;
62
63    e = g_malloc0(sizeof(*e));
64    e->init = fn;
65
66    l = find_type(type);
67
68    QTAILQ_INSERT_TAIL(l, e, node);
69}
70
71void module_call_init(module_init_type type)
72{
73    ModuleTypeList *l;
74    ModuleEntry *e;
75
76    l = find_type(type);
77
78    QTAILQ_FOREACH(e, l, node) {
79        e->init();
80    }
81}
82