internal int setupAsync(TransferContext transferContext)
{
int ret = -1;
lock (oLockTransferContext)
{
transferContext.Reset();
switch (mEpType)
{
case EndpointTypes.Bulk:
ret = LibUsbAPI.usb_bulk_setup_async(mUsbDevice.Handle, ref transferContext.mContext, EpNum);
break;
case EndpointTypes.Interrupt:
ret = LibUsbAPI.usb_interrupt_setup_async(mUsbDevice.Handle, ref transferContext.mContext, EpNum);
break;
case EndpointTypes.Isochronous:
ret = LibUsbAPI.usb_isochronous_setup_async(mUsbDevice.Handle, ref transferContext.mContext, EpNum, mPacketSize);
break;
}
if (ret < 0 || !transferContext.mContext.IsValid)
{
UsbGlobals.Error(this, UsbGlobals.LastError, "setupAsync", ret);
}
return(ret);
}
}
private void ReadData(object obj)
{
int ret = 0;
TransferContext transferContext = (TransferContext)obj;
UsbEndpointReader reader = (UsbEndpointReader)transferContext.mEndpointBase;
reader.mDataReceivedEnabled = true;
try
{
while (ret >= 0 && !reader.mEventCancelReadThread.WaitOne(0, false))
{
lock (oLockTransferContext)
transferContext.Reset();
ret = setupAsync(transferContext);
if (ret >= 0)
{
bool bContinue = true;
while (bContinue)
{
ret = submitAsync(transferContext);
if (ret >= 0)
{
ReapRetry:
ret = reapAsyncNoCancel(transferContext);
if (ret < 0)
{
if (ret == (int)ErrorCodes.ETIMEDOUT)
{
if (!transferContext.mbAsyncCancelled && !reader.mEventCancelReadThread.WaitOne(0, false))
{
goto ReapRetry;
}
else
{
ret = (int)ErrorCodes.EINTR;
}
}
}
}
lock (oLockTransferContext)
bContinue = ((transferContext.mCurrentRemaining > 0) && (ret == transferContext.mRequested));
}
freeAsync(transferContext);
}
if (ret >= 0)
{
EventHandler <DataReceivedArgs> temp = reader.DataReceived;
if (temp != null)
{
temp(this, new DataReceivedArgs(transferContext.Buffer, transferContext.currentTransmitted));
}
}
}
}
catch (ThreadAbortException)
{
Debug.Print("ThreadAbortException:" + GetType().FullName + ".ReadData");
}
finally
{
if (transferContext.mContext.IsValid)
{
freeAsync(transferContext);
}
reader.mDataReceivedEnabled = false;
reader.TransferLock.Release();
}
}
