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
83
|
#pragma once
#include <system_error>
#define NOMINMAX
#include <Windows.h>
#include "rawaccel-settings.h"
#include "rawaccel-error.hpp"
#define RA_READ CTL_CODE(0x8888, 0x888, METHOD_OUT_DIRECT, FILE_ANY_ACCESS)
#define RA_WRITE CTL_CODE(0x8888, 0x889, METHOD_BUFFERED, FILE_ANY_ACCESS)
#pragma warning(push)
#pragma warning(disable:4245) // int -> DWORD conversion while passing CTL_CODE
namespace rawaccel {
settings read() {
HANDLE ra_handle = INVALID_HANDLE_VALUE;
ra_handle = CreateFileW(L"\\\\.\\rawaccel", 0, 0, 0, OPEN_EXISTING, 0, 0);
if (ra_handle == INVALID_HANDLE_VALUE) {
throw install_error();
}
settings args;
DWORD dummy;
BOOL success = DeviceIoControl(
ra_handle,
RA_READ,
NULL, // input buffer
0, // input buffer size
&args, // output buffer
sizeof(settings), // output buffer size
&dummy, // bytes returned
NULL // overlapped structure
);
CloseHandle(ra_handle);
if (!success) {
throw std::system_error(GetLastError(), std::system_category(), "DeviceIoControl failed");
}
return args;
}
void write(const settings& args) {
HANDLE ra_handle = INVALID_HANDLE_VALUE;
ra_handle = CreateFileW(L"\\\\.\\rawaccel", 0, 0, 0, OPEN_EXISTING, 0, 0);
if (ra_handle == INVALID_HANDLE_VALUE) {
throw install_error();
}
DWORD dummy;
BOOL success = DeviceIoControl(
ra_handle,
RA_WRITE,
const_cast<settings*>(&args), // input buffer
sizeof(settings), // input buffer size
NULL, // output buffer
0, // output buffer size
&dummy, // bytes returned
NULL // overlapped structure
);
CloseHandle(ra_handle);
if (!success) {
throw std::system_error(GetLastError(), std::system_category(), "DeviceIoControl failed");
}
}
}
#pragma warning(pop)
|