WDU_StreamGetStatus()

DWORD DLLCALLCONV WDU_StreamGetStatus	(	_In_ WDU_STREAM_HANDLE	hStream,
		_Outptr_ BOOL *	pfIsRunning,
		_Outptr_ DWORD *	pdwLastError,
		_Outptr_ DWORD *	pdwBytesInBuffer
	)

Returns a stream's current status.

This function can be called for both blocking and non-blocking streams.

Parameters

[in]	hStream	A unique identifier for the stream, as returned by WDU_StreamOpen().
[out]	pfIsRunning	Pointer to a boolean value indicating the stream's current state: TRUE - the stream is currently running; FALSE - the stream is currently stopped.
[out]	pdwLastError	Pointer to the last error associated with the stream. Note: Calling this function also resets the stream's last error.
[out]	pdwBytesInBuffer	Pointer to the current bytes count in the stream's data buffer.

Returns

WinDriver Error Code

 
DWORD dwStatus;
DWORD dwPipeNum, dwSize, dwBytesTransferred, cmd = MENU_RW_READ_PIPE;
VOID *pBuffer = NULL;
WDU_STREAM_HANDLE stream;
DWORD dwBufferSize = 0x20000;
 
dwStatus = WDU_StreamOpen(hDevice, dwPipeNum, dwBufferSize,
                    dwSize, TRUE, 0, TRANSFER_TIMEOUT, &stream);
if (dwStatus)
{
    ERR("ReadWritePipesMenu: WDU_StreamOpen() failed. "
        "error 0x%lx (\"%s\")\n", dwStatus, Stat2Str(dwStatus));
    goto End_transfer;
}
 
dwStatus = WDU_StreamStart(stream);
if (dwStatus)
{
    ERR("ReadWritePipesMenu: WDU_StreamStart() failed. error "
        "0x%lx (\"%s\")\n", dwStatus, Stat2Str(dwStatus));
    goto End_transfer;
}
 
if (cmd == MENU_RW_READ_PIPE)
{
    dwStatus = WDU_StreamRead(stream, pBuffer, dwSize,
        &dwBytesTransferred);
}
else
{
    dwStatus = WDU_StreamWrite(stream, pBuffer, dwSize,
        &dwBytesTransferred);
}
if (dwStatus)
{
    BOOL fIsRunning;
    DWORD dwLastError;
    DWORD dwBytesInBuffer;
 
    dwStatus = WDU_StreamGetStatus(stream, &fIsRunning,
        &dwLastError, &dwBytesInBuffer);
    if (!dwStatus)
        dwStatus = dwLastError;
}
 
WDU_StreamClose(stream);