private void InternalClose()
{
Win32Com.CancelIo(this.hPort);
if (this.rxThread != null)
{
this.rxThread.Abort();
this.rxThread.Join(100);
this.rxThread = null;
}
Win32Com.CloseHandle(this.hPort);
if (this.ptrUWO != IntPtr.Zero)
{
Marshal.FreeHGlobal(this.ptrUWO);
}
this.stateRTS = 2;
this.stateDTR = 2;
this.stateBRK = 2;
this.online = false;
}
private void ReceiveThread()
{
uint num;
uint num1 = 0;
uint num2 = 0;
byte[] numArray = new byte[1];
bool flag = true;
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
Win32Com.OVERLAPPED handle = new Win32Com.OVERLAPPED();
uint num3 = 0;
IntPtr intPtr = Marshal.AllocHGlobal(Marshal.SizeOf(handle));
IntPtr intPtr1 = Marshal.AllocHGlobal(Marshal.SizeOf(num3));
handle.Offset = 0;
handle.OffsetHigh = 0;
handle.hEvent = autoResetEvent.Handle;
Marshal.StructureToPtr(handle, intPtr, true);
try
{
while (Win32Com.SetCommMask(this.hPort, 0x1fd))
{
Marshal.WriteInt32(intPtr1, 0);
if (flag)
{
this.startEvent.Set();
flag = false;
}
if (!Win32Com.WaitCommEvent(this.hPort, intPtr1, intPtr))
{
if ((long)Marshal.GetLastWin32Error() != (long)0x3e5)
{
throw new CommPortException("IO Error [002]");
}
else
{
autoResetEvent.WaitOne();
}
}
num3 = (uint)Marshal.ReadInt32(intPtr1);
if ((num3 & 128) != 0)
{
if (!Win32Com.ClearCommError(this.hPort, out num1, IntPtr.Zero))
{
throw new CommPortException("IO Error [003]");
}
else
{
int num4 = 0;
StringBuilder stringBuilder = new StringBuilder("UART Error: ", 40);
if ((num1 & 8) != 0)
{
stringBuilder = stringBuilder.Append("Framing,");
num4++;
}
if ((num1 & 0x400) != 0)
{
stringBuilder = stringBuilder.Append("IO,");
num4++;
}
if ((num1 & 2) != 0)
{
stringBuilder = stringBuilder.Append("Overrun,");
num4++;
}
if ((num1 & 1) != 0)
{
stringBuilder = stringBuilder.Append("Receive Cverflow,");
num4++;
}
if ((num1 & 4) != 0)
{
stringBuilder = stringBuilder.Append("Parity,");
num4++;
}
if ((num1 & 0x100) != 0)
{
stringBuilder = stringBuilder.Append("Transmit Overflow,");
num4++;
}
if (num4 <= 0)
{
if (num1 != 16)
{
throw new CommPortException("IO Error [003]");
}
else
{
num3 = num3 | 64;
}
}
else
{
stringBuilder.Length = stringBuilder.Length - 1;
throw new CommPortException(stringBuilder.ToString());
}
}
}
if ((num3 & 1) != 0)
{
do
{
num = 0;
if (Win32Com.ReadFile(this.hPort, numArray, 1, out num, intPtr))
{
if (num != 1)
{
continue;
}
this.OnRxChar(numArray[0]);
}
else
{
Marshal.GetLastWin32Error();
throw new CommPortException("IO Error [004]");
}
}while (num > 0);
}
if ((num3 & 4) != 0)
{
lock (this.empty)
{
this.empty[0] = true;
}
this.OnTxDone();
}
if ((num3 & 64) != 0)
{
this.OnBreak();
}
uint num5 = 0;
if ((num3 & 8) != 0)
{
num5 = num5 | 16;
}
if ((num3 & 16) != 0)
{
num5 = num5 | 32;
}
if ((num3 & 32) != 0)
{
num5 = num5 | 128;
}
if ((num3 & 0x100) != 0)
{
num5 = num5 | 64;
}
if (num5 == 0)
{
continue;
}
if (Win32Com.GetCommModemStatus(this.hPort, out num2))
{
this.OnStatusChange(new CommBase.ModemStatus(num5), new CommBase.ModemStatus(num2));
}
else
{
throw new CommPortException("IO Error [005]");
}
}
throw new CommPortException("IO Error [001]");
}
catch (Exception exception1)
{
Exception exception = exception1;
Win32Com.CancelIo(this.hPort);
if (intPtr1 != IntPtr.Zero)
{
Marshal.FreeHGlobal(intPtr1);
}
if (intPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(intPtr);
}
if (exception as ThreadAbortException == null)
{
this.rxException = exception;
this.OnRxException(exception);
}
}
}