return 0, nil, syscall.EPLAN9
}

func (c *IPConn) readMsg(b, oob []byte) (n, oobn, flags int, addr *IPAddr, err error) {
	return 0, 0, 0, nil, syscall.EPLAN9
}

func (c *IPConn) writeTo(b []byte, addr *IPAddr) (int, error) {
	return 0, syscall.EPLAN9
}

func (c *IPConn) writeMsg(b, oob []byte, addr *IPAddr) (n, oobn int, err error) {
	return 0, 0, syscall.EPLAN9
}

func SendFile(dstFD *FD, src int, remain int64) (written int64, err error, handled bool) {
	defer func() {
		TestHookDidSendFile(dstFD, src, written, err, handled)
	}()
	if err := dstFD.writeLock(); err != nil {
		return 0, err, false
	}
	defer dstFD.writeUnlock()

	if err := dstFD.pd.prepareWrite(dstFD.isFile); err != nil {
		return 0, err, false
	}

	dst := dstFD.Sysfd
	for remain > 0 {

     *
     * @param output output stream to write build cache entry to
     * @throws IOException when an I/O error occurs when writing the cache entry to the given output stream
     */
    void writeTo(OutputStream output) throws IOException;

    /**
     * Returns the size of the build cache entry to be written.
     *
     * @return the size of the build cache entry to be written.
     * @since 4.1
     */

class AsyncRequestBody : RequestBody() {
  private val requestBodySinks: BlockingQueue<BufferedSink> = LinkedBlockingQueue()

  override fun contentType(): MediaType? = null

  override fun writeTo(sink: BufferedSink) {
    requestBodySinks.add(sink)
  }

  override fun isDuplex(): Boolean = true

  @Throws(InterruptedException::class)
  fun takeSink(): BufferedSink {

		t.Errorf("UnreadByte: got nil, want error")
	}

	if (&strings.Reader{}).UnreadRune() == nil {
		t.Errorf("UnreadRune: got nil, want error")
	}

	if n, err := (&strings.Reader{}).WriteTo(io.Discard); n != 0 || err != nil {
		t.Errorf("WriteTo: got %d, %v; want 0, nil", n, err)
	}

import java.io.IOException;

interface ResponseProducer {
    default boolean isFailure() {
        return false;
    }

    /**
     * Called to handle a request. Is *not* called under lock.
     */
    void writeTo(int requestId, HttpExchange exchange) throws IOException;

    /**
     * Returns the failure, if any.
     */
    default RuntimeException getFailure() {
        throw new IllegalStateException();
    }

        persistentCache.withFileLock(() -> {
            // Additional locking necessary because of https://github.com/gradle/gradle/issues/3537
            lock.writeLock().lock();
            try {
                storeInsideLock(key, file);
            } finally {
                lock.writeLock().unlock();
            }
        });
    }

    private void storeInsideLock(HashCode key, File sourceFile) {

		// TransmitFile does not work with pipes
		return 0, syscall.ESPIPE
	}
	if ft, _ := syscall.GetFileType(src); ft == syscall.FILE_TYPE_PIPE {
		return 0, syscall.ESPIPE
	}

	if err := fd.writeLock(); err != nil {
		return 0, err
	}
	defer fd.writeUnlock()

	o := &fd.wop
	o.handle = src

	// TODO(brainman): skip calling syscall.Seek if OS allows it

        return output;
    }

    public InputStream getInputStream() {
        return input;
    }

    public void writeTo(OutputStream target) throws IOException {
        while (prepareRead() != -1) {
            currentReadChunk.writeTo(target);
        }
    }

    public void readFrom(InputStream inputStream, int len) throws IOException {
        int bytesLeft = len;

            // we only allow 1 promotion job running at the same time to avoid website xml conflicts
            feature {
                type = "JetBrains.SharedResources"
                param("locks-param", "WebsiteReleasesXml writeLock")
            }
        }
    }