// (st_size, as made by say ftruncate(2)), would require a metadata flush.
//
// The aim of fdatasync() is to reduce disk activity for applications that
// do not require all metadata to be synchronized with the disk.
func Fdatasync(f *os.File) error {
	return syscall.Fdatasync(int(f.Fd()))
}

// FadviseDontNeed invalidates page-cache
func FadviseDontNeed(f *os.File) error {

    }

    @Test
    public void test_crawlerList_synchronization() {
        // Test that the crawler list is synchronized
        List<org.codelibs.fess.crawler.Crawler> crawlerList = webFsIndexHelper.crawlerList;
        assertTrue(crawlerList.getClass().getName().contains("Synchronized"));
    }

    @Test
    public void test_defaultValues() {

    check(socket == null)
    val socket = serverSocket!!.accept()!!
    this.socket = socket

    // Bail out now if this instance was closed while waiting for the socket to accept.
    synchronized(this) {
      if (executor.isShutdown) {
        socket.close()
        return
      }
    }
    val outputStream = socket.getOutputStream()
    val inputStream = socket.getInputStream()

      return false;
    }
  }

  private static final class RecordingRunnable implements Runnable {
    final CountDownLatch wasRun = new CountDownLatch(1);

    // synchronized so that checkState works as expected.
    @Override
    public synchronized void run() {
      checkState(wasRun.getCount() > 0);
      wasRun.countDown();
    }
  }

    @Override
    public DefaultSettingsBuildingRequest setSystemProperties(Properties systemProperties) {
        if (systemProperties != null) {
            this.systemProperties = new Properties();
            synchronized (systemProperties) { // avoid concurrent modification if someone else sets/removes an unrelated
                // system property
                this.systemProperties.putAll(systemProperties);
            }

     *
     * @return The compiled Pattern for sensitive key matching
     */
    private static Pattern getSensitivePattern() {
        if (sensitivePattern == null) {
            synchronized (SystemUtil.class) {
                if (sensitivePattern == null) {
                    final String patternStr = System.getProperty(FessConfig.APP_LOG_SENSITIVE_PROPERTY_PATTERN, DEFAULT_SENSITIVE_PATTERN);

        handle.sendrecv(rpc);
        if (rpc.retval != 0) {
            throw new SmbException(rpc.retval, false);
        }
        this.opened = true;
    }

    @Override
    public synchronized void close() throws IOException {
        if (this.opened) {
            this.opened = false;
            final MsrpcSamrCloseHandle rpc = new MsrpcSamrCloseHandle(this);
            this.handle.sendrecv(rpc);

    protected CrawlerClientFactory crawlerClientFactory;

    /**
     * List of URLs to be deleted, cached for batch processing.
     * All access is synchronized via indexUpdateCallback lock.
     */
    protected List<String> deleteUrlList = new ArrayList<>();

    /** Maximum size of the delete URL cache before batch deletion is triggered. */

    public void setLabelTypeIds(final String[] labelTypeIds) {
        this.labelTypeIds = labelTypeIds;
    }

    public List<LabelType> getLabelTypeList() {
        if (labelTypeList == null) {
            synchronized (this) {
                if (labelTypeList == null) {
                    final FessConfig fessConfig = ComponentUtil.getFessConfig();

    address: Address,
    call: RealCall,
    routes: List<Route>?,
    requireMultiplexed: Boolean,
  ): RealConnection? {
    for (connection in connections) {
      // In the first synchronized block, acquire the connection if it can satisfy this call.
      val acquired =
        connection.withLock {
          when {
            requireMultiplexed && !connection.isMultiplexed -> {
              false