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
|
#include <Kernel/Devices/Device.h>
#include <Kernel/FileSystem/InodeMetadata.h>
#include <LibC/errno_numbers.h>
static HashMap<u32, Device*>* s_all_devices;
HashMap<u32, Device*>& Device::all_devices()
{
if (s_all_devices == nullptr)
s_all_devices = new HashMap<u32, Device*>;
return *s_all_devices;
}
void Device::for_each(Function<void(Device&)> callback)
{
for (auto& entry : all_devices())
callback(*entry.value);
}
Device* Device::get_device(unsigned major, unsigned minor)
{
auto it = all_devices().find(encoded_device(major, minor));
if (it == all_devices().end())
return nullptr;
return it->value;
}
Device::Device(unsigned major, unsigned minor)
: m_major(major)
, m_minor(minor)
{
u32 device_id = encoded_device(major, minor);
auto it = all_devices().find(device_id);
if (it != all_devices().end()) {
dbg() << "Already registered " << major << "," << minor << ": " << it->value->class_name();
}
ASSERT(!all_devices().contains(device_id));
all_devices().set(device_id, this);
}
Device::~Device()
{
all_devices().remove(encoded_device(m_major, m_minor));
}
String Device::absolute_path() const
{
return String::format("device:%u,%u (%s)", m_major, m_minor, class_name());
}
String Device::absolute_path(const FileDescription&) const
{
return absolute_path();
}
|
