module.c revision 031d655004e505a15e92580a16a181d1d247c4d5 
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 */
13
14#include "qemu-common.h"
15#include "qemu/queue.h"
16#include "qemu/module.h"
17
18typedef struct ModuleEntry
19{
20    module_init_type type;
21    void (*init)(void);
22    QTAILQ_ENTRY(ModuleEntry) node;
23} ModuleEntry;
24
25typedef QTAILQ_HEAD(, ModuleEntry) ModuleTypeList;
26
27static ModuleTypeList init_type_list[MODULE_INIT_MAX];
28
29static void init_types(void)
30{
31    static int inited;
32    int i;
33
34    if (inited) {
35        return;
36    }
37
38    for (i = 0; i < MODULE_INIT_MAX; i++) {
39        QTAILQ_INIT(&init_type_list[i]);
40    }
41
42    inited = 1;
43}
44
45
46static ModuleTypeList *find_type(module_init_type type)
47{
48    ModuleTypeList *l;
49
50    init_types();
51
52    l = &init_type_list[type];
53
54    return l;
55}
56
57void register_module_init(void (*fn)(void), module_init_type type)
58{
59    ModuleEntry *e;
60    ModuleTypeList *l;
61
62    e = qemu_mallocz(sizeof(*e));
63    e->init = fn;
64
65    l = find_type(type);
66
67    QTAILQ_INSERT_TAIL(l, e, node);
68}
69
70void module_call_init(module_init_type type)
71{
72    ModuleTypeList *l;
73    ModuleEntry *e;
74
75    l = find_type(type);
76
77    QTAILQ_FOREACH(e, l, node) {
78        e->init();
79    }
80}
81