static int windows_wminput_poll(ManyMouseEvent *ev)
{
MSG Msg; /* run the queue for WM_INPUT messages, etc ... */
int found = 0;
/* ...favor existing events in the queue... */
pEnterCriticalSection(&mutex);
if (input_events_read != input_events_write) /* no events if equal. */
{
CopyMemory(ev, &input_events[input_events_read], sizeof (*ev));
input_events_read = ((input_events_read + 1) % MAX_EVENTS);
found = 1;
} /* if */
pLeaveCriticalSection(&mutex);
if (!found)
{
/* pump Windows for new hardware events... */
while (pPeekMessageA(&Msg, raw_hwnd, 0, 0, PM_REMOVE))
{
pTranslateMessage(&Msg);
pDispatchMessageA(&Msg);
} /* while */
/* In case something new came in, give it to the app... */
pEnterCriticalSection(&mutex);
if (input_events_read != input_events_write) /* no events if equal. */
{
CopyMemory(ev, &input_events[input_events_read], sizeof (*ev));
input_events_read = ((input_events_read + 1) % MAX_EVENTS);
found = 1;
} /* if */
pLeaveCriticalSection(&mutex);
} /* if */
/*
* Check for disconnects if queue is totally empty and Windows didn't
* report anything new at this time. This ensures that we don't send a
* disconnect event through ManyMouse and then later give a valid
* event to the app for a device that is now missing.
*/
if (!found)
found = check_for_disconnects(ev);
return found;
} /* windows_wminput_poll */
static void cleanup_window(void)
{
if (raw_hwnd)
{
MSG Msg;
pDestroyWindow(raw_hwnd);
while (pPeekMessageA(&Msg, raw_hwnd, 0, 0, PM_REMOVE))
{
pTranslateMessage(&Msg);
pDispatchMessageA(&Msg);
} /* while */
raw_hwnd = 0;
} /* if */
if (class_atom)
{
pUnregisterClassA(class_name, pGetModuleHandleA(NULL));
class_atom = 0;
} /* if */
} /* cleanup_window */
/*
* Monotonic and real time functions
*/
static unsigned __stdcall windows_clock_gettime_threaded(void *param)
{
struct timer_request *request;
LARGE_INTEGER hires_counter;
MSG msg;
// The following call will create this thread's message queue
// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644946.aspx
pPeekMessageA(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
// Signal windows_init_clock() that we're ready to service requests
if (!SetEvent((HANDLE)param))
usbi_dbg("SetEvent failed for timer init event: %s", windows_error_str(0));
param = NULL;
// Main loop - wait for requests
while (1) {
if (pGetMessageA(&msg, NULL, WM_TIMER_REQUEST, WM_TIMER_EXIT) == -1) {
usbi_err(NULL, "GetMessage failed for timer thread: %s", windows_error_str(0));
return 1;
}
switch (msg.message) {
case WM_TIMER_REQUEST:
// Requests to this thread are for hires always
// Microsoft says that this function always succeeds on XP and later
// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644904.aspx
request = (struct timer_request *)msg.lParam;
QueryPerformanceCounter(&hires_counter);
request->tp->tv_sec = (long)(hires_counter.QuadPart / hires_frequency);
request->tp->tv_nsec = (long)(((hires_counter.QuadPart % hires_frequency) / 1000) * hires_ticks_to_ps);
if (!SetEvent(request->event))
usbi_err(NULL, "SetEvent failed for timer request: %s", windows_error_str(0));
break;
case WM_TIMER_EXIT:
usbi_dbg("timer thread quitting");
return 0;
}
}
}