It seems to go away if I restart my computer, but it seems absurd that I
should have to restart my computer.
It also very quickly reappears.
My application doesn't have any memory leaks (I've checked using wrap
malloc and wrap free).
I've registered two RAWINPUTDEVICE elements, both have..
* dwFlags == RIDEV_DEVNOTIFY | RIDEV_INPUTSINK
* hwndTarget != NULL
* usUsagePage == HID_USAGE_PAGE_GENERIC
One has usUsage == HID_USAGE_GENERIC_MOUSE
The other has usUsage == HID_USAGE_GENERIC_KEYBOARD
Here is the GetRawInputData code in the WNDPROC for WM_INPUT..
struct
{
PRAWINPUT a;
} prawinput = { .a = NULL };
do
{
struct
{
HRAWINPUT a;
} hrawinput = { .a = (HRAWINPUT)lParam };
UINT a;
if(GetRawInputData(hrawinput.a, RID_HEADER, NULL, &a,
sizeof(RAWINPUTHEADER)) != 0)
{
//... //< print GetLastError using FormatMessage
break;
}
prawinput.a = malloc(a);
UINT a = GetRawInputData((HRAWINPUT)lParam, RID_HEADER, prawinput.a,
&a, sizeof(RAWINPUTHEADER));
printf("%u bytes copied into prawinput.a\n", a);
printf("sizeof(<RAWINPUT>.header) %i\n", sizeof(prawinput.a->header));
printf("sizeof(<RAWINPUT>.data) %i\n", sizeof(prawinput.a->data));
printf("sizeof(<RAWINPUT>.mouse %i sizeof(<RAWINPUT>.keyboard) %i
sizeof(<RAWINPUT>.hid) %i\n", sizeof(prawinput.a->data.mouse),
sizeof(prawinput.a->data.keyboard), sizeof(prawinput.a->data.hid));
if(a == (UINT)-1)
{
//... //< print GetLastError using FormatMessage
break;
}
printf("<RAWINPUT>->header.hDevice %p\n",
prawinput.a->header.hDevice);
//...
} while(0);
if(prawinput.a != NULL)
{
free(prawinput.a);
}
Is this a bug in mingw, I am not doing anything different from
https://www.codeproject.com/articles/185522/using-the-raw-input-api-to-process-joystick-input
in using GetRawInputData, besides using malloc instead of HeapAlloc,
which the documentation doesn't mention as a criteria, and the message
after the second GetRawInputData prints "24 bytes copied into
prawinput.a" if using RID_HEADER and "48 bytes copied into prawinput.a"
if using RID_INPUT. In both cases the last message printed is
"<RAWINPUT>->header.hDevice 0000000000000000".
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