protected ModemStatus GetModemStatus()
{
this.CheckOnline();
uint num;
if (!Win32Com.GetCommModemStatus(this.hPort, out num))
{
this.ThrowException("Unexpected failure");
}
return(new ModemStatus(num));
}
private void ReceiveThread()
{
byte[] lpBuffer = new byte[1];
AutoResetEvent event2 = new AutoResetEvent(false);
OVERLAPPED overlapped = default(OVERLAPPED);
IntPtr lpOverlapped = Marshal.AllocHGlobal(Marshal.SizeOf(overlapped));
overlapped.Offset = 0u;
overlapped.OffsetHigh = 0u;
overlapped.hEvent = event2.SafeWaitHandle.DangerousGetHandle();
Marshal.StructureToPtr(overlapped, lpOverlapped, true);
uint num2 = 0u;
IntPtr lpEvtMask = Marshal.AllocHGlobal(Marshal.SizeOf(num2));
try
{
while (Win32Com.SetCommMask(this.hPort, 509u))
{
Marshal.WriteInt32(lpEvtMask, 0);
if (!Win32Com.WaitCommEvent(this.hPort, lpEvtMask, lpOverlapped))
{
if ((long)Marshal.GetLastWin32Error() != 997L)
{
throw new CommPortException("IO Error [002]");
}
event2.WaitOne();
}
num2 = (uint)Marshal.ReadInt32(lpEvtMask);
if ((num2 & 128u) != 0u)
{
uint num3;
if (!Win32Com.ClearCommError(this.hPort, out num3, IntPtr.Zero))
{
throw new CommPortException("IO Error [003]");
}
StringBuilder builder = new StringBuilder("UART Error: ", 40);
if ((num3 & 8u) != 0u)
{
builder = builder.Append("Framing,");
}
if ((num3 & 1024u) != 0u)
{
builder = builder.Append("IO,");
}
if ((num3 & 2u) != 0u)
{
builder = builder.Append("Overrun,");
}
if ((num3 & 1u) != 0u)
{
builder = builder.Append("Receive Cverflow,");
}
if ((num3 & 4u) != 0u)
{
builder = builder.Append("Parity,");
}
if ((num3 & 256u) != 0u)
{
builder = builder.Append("Transmit Overflow,");
}
builder.Length--;
throw new CommPortException(builder.ToString());
}
else
{
if ((num2 & 1u) != 0u)
{
while (true)
{
uint num4 = 0u;
if (!Win32Com.ReadFile(this.hPort, lpBuffer, 1u, out num4, lpOverlapped))
{
if ((long)Marshal.GetLastWin32Error() != 997L)
{
break;
}
Win32Com.CancelIo(this.hPort);
num4 = 0u;
}
if (num4 == 1u)
{
this.OnRxChar(lpBuffer[0]);
}
if (num4 <= 0u)
{
goto IL_1F7;
}
}
throw new CommPortException("IO Error [004]");
}
IL_1F7:
if ((num2 & 4u) != 0u)
{
this.OnTxDone();
}
if ((num2 & 64u) != 0u)
{
this.OnBreak();
}
uint val = 0u;
if ((num2 & 8u) != 0u)
{
val |= 16u;
}
if ((num2 & 16u) != 0u)
{
val |= 32u;
}
if ((num2 & 32u) != 0u)
{
val |= 128u;
}
if ((num2 & 256u) != 0u)
{
val |= 64u;
}
uint num5;
if (!Win32Com.GetCommModemStatus(this.hPort, out num5))
{
throw new CommPortException("IO Error [005]");
}
this.OnStatusChange(new ModemStatus(val), new ModemStatus(num5));
}
}
throw new CommPortException("IO Error [001]");
}
catch (Exception exception)
{
if (lpEvtMask != IntPtr.Zero)
{
Marshal.FreeHGlobal(lpEvtMask);
}
if (lpOverlapped != IntPtr.Zero)
{
Marshal.FreeHGlobal(lpOverlapped);
}
if (!(exception is ThreadAbortException))
{
this.rxException = exception;
this.OnRxException(exception);
}
}
}