blob: 8e8329e1f3cca5f445bcc3ac1b2d468bd5949a89 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2026 Richard Qin */
/*
* kobject — implementation.
*
* Lives in lib/ (mirroring Linux's lib/kobject.c) because kobject is a
* generic primitive, not tied to the driver model.
*
* Reference: docs/specs/storage_stack.md §4.2
*/
#include <lume/kobject.h>
#include <lume/container_of.h>
#include <lume/klog.h>
void kobject_init(kobject* k, const kobj_type* type)
{
if (k == nullptr) {
return;
}
k->name = nullptr;
k->parent = nullptr;
k->ktype = type;
k->state_in_sysfs = false;
k->entry.init();
k->children.init();
k->lock.init("kobject");
kref_init(&k->refcount);
}
int kobject_add(kobject* k, kobject* parent, const char* name)
{
if (k == nullptr) {
return -1;
}
k->name = name;
if (parent != nullptr) {
kobject_get(parent);
k->parent = parent;
LockGuard g(parent->lock);
list_add_tail(&k->entry, &parent->children);
}
return 0;
}
void kobject_del(kobject* k)
{
if (k == nullptr || k->parent == nullptr) {
return;
}
kobject* parent = k->parent;
{
LockGuard g(parent->lock);
list_del_init(&k->entry);
}
k->parent = nullptr;
kobject_put(parent);
}
void kobject_get(kobject* k)
{
if (k != nullptr) {
kref_get(&k->refcount);
}
}
static void kobject_release(kref* r)
{
kobject* k = container_of(r, kobject, refcount);
if (k->ktype != nullptr && k->ktype->release != nullptr) {
k->ktype->release(k);
}
}
void kobject_put(kobject* k)
{
if (k == nullptr) {
return;
}
kref_put(&k->refcount, kobject_release);
}
|
