GetFileOptions()

unsafe FileOptions Microsoft.Win32.SafeHandles.SafeFileHandle.GetFileOptions ( )

inlinepackage

Definition at line 533 of file SafeFileHandle.cs.

    {
        FileOptions fileOptions = _fileOptions;
        if (fileOptions != (FileOptions)(-1))
        {
            return fileOptions;
        }
        Interop.NtDll.IO_STATUS_BLOCK IoStatusBlock;
        System.Runtime.CompilerServices.Unsafe.SkipInit(out Interop.NtDll.CreateOptions createOptions);
        int num = Interop.NtDll.NtQueryInformationFile(this, out IoStatusBlock, &createOptions, 4u, 16u);
        if (num != 0L)
        {
            int errorCode = (int)Interop.NtDll.RtlNtStatusToDosError(num);
            throw Win32Marshal.GetExceptionForWin32Error(errorCode);
        }
        FileOptions fileOptions2 = FileOptions.None;
        if ((createOptions & (Interop.NtDll.CreateOptions)48u) == 0)
        {
            fileOptions2 |= FileOptions.Asynchronous;
        }
        if ((createOptions & Interop.NtDll.CreateOptions.FILE_WRITE_THROUGH) != 0)
        {
            fileOptions2 |= FileOptions.WriteThrough;
        }
        if ((createOptions & Interop.NtDll.CreateOptions.FILE_RANDOM_ACCESS) != 0)
        {
            fileOptions2 |= FileOptions.RandomAccess;
        }
        if ((createOptions & Interop.NtDll.CreateOptions.FILE_SEQUENTIAL_ONLY) != 0)
        {
            fileOptions2 |= FileOptions.SequentialScan;
        }
        if ((createOptions & Interop.NtDll.CreateOptions.FILE_DELETE_ON_CLOSE) != 0)
        {
            fileOptions2 |= FileOptions.DeleteOnClose;
        }
        if ((createOptions & Interop.NtDll.CreateOptions.FILE_NO_INTERMEDIATE_BUFFERING) != 0)
        {
            fileOptions2 |= (FileOptions)536870912;
        }
        return _fileOptions = fileOptions2;
    }

References Microsoft.Win32.SafeHandles.SafeFileHandle._fileOptions, System.IO.Win32Marshal.GetExceptionForWin32Error(), System.L, and Interop.NtDll.NtQueryInformationFile().