private static string GetErrorMessage(Error errorCode)
{
if (MonoUsbApi.ErrorCodeFromLibUsbError((int)errorCode, out string errorMessage) == Main.ErrorCode.Success)
{
return(errorMessage);
}
else
{
return($"An unknown error with code {(int)errorCode} has occurred.");
}
}
/// <summary>
/// Wait for the transfer to complete, timeout, or get cancelled.
/// </summary>
/// <param name="transferredCount">The number of bytes transferred on <see cref="ErrorCode.Success"/>.</param>
/// <param name="cancel">Not used for libusb-1.0. Transfers are always cancelled on timeout or error.</param>
/// <returns><see cref="ErrorCode.Success"/> if the transfer completes successfully, otherwise one of the other <see cref="ErrorCode"/> codes.</returns>
public override ErrorCode Wait(out int transferredCount, bool cancel)
{
transferredCount = 0;
int ret = 0;
MonoUsbError monoError;
ErrorCode ec;
int iWait = WaitHandle.WaitAny(new WaitHandle[] { mTransferCompleteEvent, mTransferCancelEvent },
Timeout.Infinite,
UsbConstants.EXIT_CONTEXT);
switch (iWait)
{
case 0: // TransferCompleteEvent
if (mTransfer.Status == MonoUsbTansferStatus.TransferCompleted)
{
transferredCount = mTransfer.ActualLength;
return(ErrorCode.Success);
}
string s;
monoError = MonoUsbApi.MonoLibUsbErrorFromTransferStatus(mTransfer.Status);
ec = MonoUsbApi.ErrorCodeFromLibUsbError((int)monoError, out s);
UsbError.Error(ErrorCode.MonoApiError, (int)monoError, "Wait:" + s, EndpointBase);
return(ec);
case 1: // TransferCancelEvent
ret = (int)mTransfer.Cancel();
bool bTransferComplete = mTransferCompleteEvent.WaitOne(100, UsbConstants.EXIT_CONTEXT);
mTransferCompleteEvent.Set();
if (ret != 0 || !bTransferComplete)
{
ec = ret == 0 ? ErrorCode.CancelIoFailed : ErrorCode.MonoApiError;
UsbError.Error(ec, ret, String.Format("Wait:Unable to cancel transfer or the transfer did not return after it was cancelled. Cancelled:{0} TransferCompleted:{1}", (MonoUsbError)ret, bTransferComplete), EndpointBase);
return(ec);
}
return(ErrorCode.IoCancelled);
default: // Critical failure timeout
mTransfer.Cancel();
ec = ((EndpointBase.mEpNum & (byte)UsbCtrlFlags.Direction_In) > 0) ? ErrorCode.ReadFailed : ErrorCode.WriteFailed;
mTransferCompleteEvent.Set();
UsbError.Error(ec, ret, String.Format("Wait:Critical timeout failure! The transfer callback function was not called within the allotted time."), EndpointBase);
return(ec);
}
}