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mystat.c
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mystat.c
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#include <windows.h>
#include <strsafe.h>
#ifdef _DEBUG
#define dprintf(...) dbgprintf(__VA_ARGS__)
#else
#define dprintf(...) ((void)0)
#endif
static HANDLE stat_file = INVALID_HANDLE_VALUE;
#ifdef USE_BUFIO
#define stat_bufszie 4096
static BYTE stat_buf[stat_bufszie];
static DWORD stat_bufp = 0;
#endif
static HHOOK kbd_hook = NULL;
static DWORD has_ctrl = 0;
static DWORD has_alt = 0;
static DWORD prev_m = 0;
static volatile LONG isquit = 0;
static volatile LONG kbd_cur = 0;
static LONG kbd_stat[2][256] = {0};
void dbgprintf(LPCTSTR format, ...) {
TCHAR s[256];
va_list args;
va_start(args, format);
StringCchVPrintf(s, 256, format, args);
va_end(args);
OutputDebugString(s);
}
LRESULT CALLBACK kbd_proc(int nCode, WPARAM wParam, LPARAM lParam) {
if (nCode == HC_ACTION) {
KBDLLHOOKSTRUCT *hs = (KBDLLHOOKSTRUCT *)lParam;
dprintf(TEXT("[mystat] [%lu] ==>"
"vkCode: %lu, scanCode: %lu, flags: %lu, time: %lu, dwExtraInfo: %lu"),
wParam, hs->vkCode, hs->scanCode, hs->flags, hs->time, hs->dwExtraInfo);
switch (wParam) {
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
switch (hs->vkCode) {
case VK_LCONTROL:
case VK_RCONTROL:
has_ctrl = 1;
break;
case VK_LMENU:
case VK_RMENU:
has_alt = 1;
break;
case 'M':
if (has_ctrl && has_alt) {
prev_m = 1;
}
break;
case 'Y':
if (prev_m && has_ctrl && has_alt) {
dprintf(TEXT("[mystat] post quit"));
UnhookWindowsHookEx(kbd_hook);
PostQuitMessage(0);
}
default:
prev_m = 0;
}
InterlockedIncrement(&kbd_stat[kbd_cur][hs->vkCode]);
break;
case WM_KEYUP:
case WM_SYSKEYUP:
switch (hs->vkCode) {
case VK_LCONTROL:
case VK_RCONTROL:
has_ctrl = 0;
break;
case VK_LMENU:
case VK_RMENU:
has_alt = 0;
}
break;
}
}
return CallNextHookEx(kbd_hook, nCode, wParam, lParam);
}
#ifdef USE_BUFIO
void flush_stat() {
if (stat_bufp == 0) {
return;
}
DWORD written;
BOOL ok = WriteFile(stat_file, stat_buf, stat_bufp, &written, NULL);
if (!ok) {
dprintf(TEXT("[mystat] WriteFile() failed: %lu"), GetLastError());
}
stat_bufp = 0;
}
#endif
void write_stat(void *data, size_t n) {
#ifdef USE_BUFIO
if (stat_bufp + n > stat_bufszie) {
flush_stat();
}
CopyMemory(&stat_buf[stat_bufp], data, n);
stat_bufp += n;
#else
DWORD written;
BOOL ok = WriteFile(stat_file, data, n, &written, NULL);
if (!ok) {
dprintf(TEXT("[mystat] WriteFile() failed: %lu"), GetLastError());
}
#endif
}
DWORD WINAPI stat_proc(LPVOID lpParameter) {
dprintf(TEXT("[mystat] stat_proc() start"));
struct key_stat {
DWORD code;
DWORD times;
};
struct {
FILETIME at;
DWORD count;
struct key_stat key[256];
} stat;
DWORD offset = 0;
while (!isquit) {
Sleep(1000 - offset);
DWORD before = GetTickCount();
LONG cur = kbd_cur;
kbd_cur = (cur + 1) % 2;
GetSystemTimeAsFileTime(&stat.at);
stat.count = 0;
for (int i = 0; i < 256; i++) {
if (kbd_stat[cur][i] == 0) {
continue;
}
stat.key[stat.count].code = (DWORD)i;
stat.key[stat.count].times = (DWORD)kbd_stat[cur][i];
stat.count++;
}
if (stat.count > 0) {
write_stat(&stat, sizeof(FILETIME) + sizeof(DWORD) + stat.count * sizeof(struct key_stat));
}
ZeroMemory(&kbd_stat[cur], sizeof(LONG) * 256);
offset = GetTickCount() - before;
dprintf(TEXT("[mystat] stat cost: %dms"), offset);
}
#ifdef USE_BUFIO
flush_stat();
#endif
dprintf(TEXT("[mystat] stat_proc() exit"));
return 0;
}
int main() {
SYSTEMTIME t;
GetLocalTime(&t);
TCHAR stat_name[48];
StringCchPrintf(stat_name, 48, TEXT("%d%02d%02d%02d%02d%02d-%d.stat"),
t.wYear, t.wMonth, t.wDay, t.wHour, t.wMinute, t.wSecond, GetCurrentProcessId());
stat_file = CreateFile(
stat_name,
GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
CREATE_NEW,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (stat_file == INVALID_HANDLE_VALUE) {
dprintf(TEXT("[mystat] CreateFile() failed: %lu"), GetLastError());
return 1;
}
kbd_hook = SetWindowsHookEx(WH_KEYBOARD_LL, kbd_proc, NULL, 0);
if (kbd_hook == NULL) {
dprintf(TEXT("[mystat] SetWindowsHookEx() failed: %lu"), GetLastError());
return 1;
}
dprintf(TEXT("[mystat] SetWindowsHookEx() ok"));
HANDLE stat_th = CreateThread(NULL, 0, stat_proc, NULL, 0, NULL);
if (stat_th == NULL) {
UnhookWindowsHookEx(kbd_hook);
dprintf(TEXT("[mystat] CreateThread() failed: %lu"), GetLastError());
return 1;
}
MSG msg;
while (GetMessageW(&msg, NULL, 0, 0)) {
DispatchMessageW(&msg);
}
isquit = 1;
WaitForSingleObject(stat_th, INFINITE);
CloseHandle(stat_th);
CloseHandle(stat_file);
dprintf(TEXT("[mystat] exit"));
return (int)msg.wParam;
}