func (pr *progressReader) Close() error {
	pr.closedMu.Lock()
	defer pr.closedMu.Unlock()
	if pr.closed {
		return nil
	}
	pr.closed = true
	if pr.closer != nil {
		pr.closer.Close()
	}
	return pr.rc.Close()
}

func (pr *progressReader) Stats() (bytesScanned, bytesProcessed int64) {
	if pr == nil {
		return 0, 0
	}
	return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
}

    checkNotNull(bytes);

    Closer closer = Closer.create();
    try {
      OutputStream out = closer.register(openStream());
      out.write(bytes);
      out.flush(); // https://code.google.com/p/guava-libraries/issues/detail?id=1330
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

    checkNotNull(bytes);

    Closer closer = Closer.create();
    try {
      OutputStream out = closer.register(openStream());
      out.write(bytes);
      out.flush(); // https://code.google.com/p/guava-libraries/issues/detail?id=1330
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

 *
 * <pre>{@code
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())

	return len(buf), nil
}

func (rc *signalingNopWriteCloser) Close() error {
	close(rc.closed)
	return rc.ReadCloser.Close()
}

// Test whether server properly closes connection when processing slow
// requests
func TestSlowRequest(t *testing.T) {
	pr, pw := io.Pipe()

	writerDone := make(chan struct{})
	go func() {
		for _, buf := range [][]byte{
			streamBeginTypeStdin,

 *
 * <pre>{@code
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())

   *
   * @param inputStream the input stream to be closed, or {@code null} in which case this method
   *     does nothing
   * @since 17.0
   */
  public static void closeQuietly(@CheckForNull InputStream inputStream) {
    try {
      close(inputStream, true);
    } catch (IOException impossible) {
      throw new AssertionError(impossible);
    }
  }

  /**

    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

// readUnlock removes a reference from the file and unlocks it for reading.
// It also closes the file if it marked as closed and there is no remaining
// reference.
func (file *file) readUnlock() {
	if file.fdmu.ReadUnlock() {
		file.destroy()
	}
}

// writeLock adds a reference to the file and locks it for writing.
// It returns an error if the file is already closed.
func (file *file) writeLock() error {
	if !file.fdmu.WriteLock() {

    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**