public bool Available(int portIndex)
{
string portName = "COM" + portIndex.ToString() + ":";
IntPtr tmphPort = Com_WinApi.CreateFileA(portName,
(UInt32)dwDesiredAccess.GENERIC_READ, 0, IntPtr.Zero,
(UInt32)dwCreationDisposion.OPEN_EXISTING, 0x0, IntPtr.Zero);
if (tmphPort == (IntPtr)Com_WinApi.INVALID_HANDLE_VALUE)
return false;
else
Com_WinApi.CloseHandle(tmphPort);
return true;
}
/// <summary>
/// Перевідкриття СОМ-порту
/// </summary>
/// <returns>Якщо true то СОМ-порт перевідкриття СОИ-порту відбулося успішно</returns>
public bool ReOpen()
{
bool fRez = false;
if (isOpen)
{
PortClear();
fRez = Com_WinApi.CloseHandle(handle);
}
isOpen = false;
if (fRez)
isOpen = Open(portIndex);
return isOpen;
}
/// <summary>
/// Check for valid file path.
/// </summary>
/// <param name="fileName">File path for check</param>
/// <param name="timeout">Timeout for executing function</param>
/// <exception cref="Timeout">Throw when file is not exists</exception>
/// <returns>Return true when path is valid else false.</returns>
public static bool FileExists(string path, int timeout, string exceptionSuffix)
{
lastResult = null;
Com_WinApi.OutputDebugString("func start");
th = new Thread(new ParameterizedThreadStart(FileExsist));
th.IsBackground = true;
th.Start(path);
th.Join(timeout);
if (th.IsAlive)
{
th.Abort();
Com_WinApi.OutputDebugString("PathFileExists: time is out");
throw new TimeoutException("Timeout" + exceptionSuffix);
//return false;
}
if (lastResult != null)
{
return((bool)lastResult);
}
return(false);
//fdPathFileExists ff = winapi.Funcs.PathFileExists;
//IAsyncResult result = ff.BeginInvoke(fileName, new AsyncCallback(WhenPathFileExists), "");
//Thread.Sleep(timeout);
//if (lastResult == null)
//{
// winapi.Funcs.OutputDebugString("PathFileExists: time is out");
// fl_timeout = true;
// //throw new TimeoutException("Timeout");
//}
//else
// return (bool)lastResult;
//return false;
}
/// <summary>
/// Check if file or directory exist
/// </summary>
/// <param name="parameter">File name or directory path</param>
private static void FileExsist(object path)
{
Com_WinApi.OutputDebugString("FileExsist start");
if (path == null)
{
lastResult = false;
return;
}
string fileName = path.ToString();
if (string.IsNullOrEmpty(fileName))
{
lastResult = false;
return;
}
uint attributes = Com_WinApi.GetFileAttributes(fileName);
if (Com_WinApi.INVALID_FILE_ATTRIBUTE == attributes)
{
Com_WinApi.GetLastError();
//if (winapi.Consts.ERROR_FILE_NOT_FOUND == error ||
// winapi.Consts.ERROR_PATH_NOT_FOUND == error)
Com_WinApi.OutputDebugString("FileExsist end _ not valid atribute");
lastResult = false;
return;
}
//isDirectory = 0 != (winapi.Consts.FILE_ATTRIBUTE_DIRECTORY & attributes);
Com_WinApi.OutputDebugString("FileExsist end");
lastResult = true;
}
