public void StartIoLoop(CancellationToken token)
{
IRawConvertible response = null;
IO_CTL_XFER_MESSAGE replyTo = default;
while (!token.IsCancellationRequested)
{
replyTo = SendInitRequest(out var nTransferred, out var data, response, replyTo);
response = HandleRequest(data, replyTo);
}
}
private IO_CTL_XFER_MESSAGE SendInitRequest(out uint nTransferred, out byte[] data,
IRawConvertible response = null, IO_CTL_XFER_MESSAGE replyTo = default)
{
nTransferred = 0;
data = default;
var outputBuffer = new byte[MAX_BCNT + IO_CTL_XFER_MESSAGE_LEN];
var outputBufferHandle = GCHandle.Alloc(outputBuffer, GCHandleType.Pinned);
var outputBufferPtr = outputBufferHandle.AddrOfPinnedObject();
var outputBufferLen = (uint)outputBuffer.Length;
GCHandle inputBufferHandle = default;
var inputBufferPtr = IntPtr.Zero;
uint inputBufferLen = 0;
if (response != null)
{
var reply = new IO_CTL_XFER_MESSAGE();
reply.cid = replyTo.cid;
reply.cmd = replyTo.cmd;
reply.bcnt = (short)response.Raw.Length;
var messageHeader = StructToBytes(reply);
var inputBuffer = messageHeader.Concat(response.Raw).ToArray();
inputBufferHandle = GCHandle.Alloc(inputBuffer, GCHandleType.Pinned);
inputBufferPtr = inputBufferHandle.AddrOfPinnedObject();
inputBufferLen = (uint)inputBuffer.Length;
}
var result = DeviceIoControl(
_device,
IOCTL_SOFTU2F_FILTER_INIT,
inputBufferPtr, inputBufferLen,
outputBufferPtr, outputBufferLen,
ref nTransferred, IntPtr.Zero);
if (result == 0)
{
return(default);
