Exemplo n.º 1
0
        public Win32FileJournalWriter(StorageEnvironmentOptions options, VoronPathSetting filename, long journalSize,
                                      Win32NativeFileAccess access   = Win32NativeFileAccess.GenericWrite,
                                      Win32NativeFileShare shareMode = Win32NativeFileShare.Read)
        {
            try
            {
                _options  = options;
                _filename = filename;
                _handle   = Win32NativeFileMethods.CreateFile(filename.FullPath,
                                                              access, shareMode, IntPtr.Zero,
                                                              Win32NativeFileCreationDisposition.OpenAlways,
                                                              options.WinOpenFlags, IntPtr.Zero);

                if (_handle.IsInvalid)
                {
                    throw new IOException("When opening file " + filename, new Win32Exception(Marshal.GetLastWin32Error()));
                }

                var length = new FileInfo(filename.FullPath).Length;
                if (length < journalSize)
                {
                    try
                    {
                        Win32NativeFileMethods.SetFileLength(_handle, journalSize);
                    }
                    catch (Exception)
                    {
                        try
                        {
                            _handle?.Dispose();
                            _handle = null;
                            File.Delete(_filename.FullPath);
                        }
                        catch (Exception)
                        {
                            // there's nothing we can do about it
                        }

                        throw;
                    }

                    length = journalSize;
                }

                NumberOfAllocated4Kb = (int)(length / (4 * Constants.Size.Kilobyte));

                _nativeOverlapped = (NativeOverlapped *)NativeMemory.AllocateMemory(sizeof(NativeOverlapped));

                _nativeOverlapped->InternalLow  = IntPtr.Zero;
                _nativeOverlapped->InternalHigh = IntPtr.Zero;
            }
            catch
            {
                Dispose();
                throw;
            }
        }
        public static extern SafeFileHandle CreateFile(string lpFileName,
		                                               Win32NativeFileAccess dwDesiredAccess, Win32NativeFileShare dwShareMode,
		                                               IntPtr lpSecurityAttributes,
		                                               Win32NativeFileCreationDisposition dwCreationDisposition,
		                                               Win32NativeFileAttributes dwFlagsAndAttributes, IntPtr hTemplateFile);
Exemplo n.º 3
0
 public static extern SafeFileHandle CreateFile(string lpFileName,
                                                Win32NativeFileAccess dwDesiredAccess, Win32NativeFileShare dwShareMode,
                                                IntPtr lpSecurityAttributes,
                                                Win32NativeFileCreationDisposition dwCreationDisposition,
                                                Win32NativeFileAttributes dwFlagsAndAttributes, IntPtr hTemplateFile);