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;
}
public PortStatus IsPortAvailable(string s)
{
IntPtr hObject = Win32Com.CreateFile(s, 0xc0000000, 0, IntPtr.Zero, 3, 0x40000000, IntPtr.Zero);
if (hObject == ((IntPtr)(-1)))
{
if (Marshal.GetLastWin32Error() == 5L)
{
return(PortStatus.unavailable);
}
hObject = Win32Com.CreateFile(this.AltName(s), 0xc0000000, 0, IntPtr.Zero, 3, 0x40000000, IntPtr.Zero);
if (hObject == ((IntPtr)(-1)))
{
if (Marshal.GetLastWin32Error() == 5L)
{
return(PortStatus.unavailable);
}
return(PortStatus.absent);
}
}
Win32Com.CloseHandle(hObject);
return(PortStatus.available);
}