}
	nsLk.ref++
	n.lockMap[resource] = nsLk
	n.lockMapMutex.Unlock()

	// Locking here will block (until timeout).
	if readLock {
		locked = nsLk.GetRLock(ctx, opsID, lockSource, timeout)
	} else {
		locked = nsLk.GetLock(ctx, opsID, lockSource, timeout)
	}

	if !locked { // We failed to get the lock
		// Decrement ref count since we failed to get the lock
		n.lockMapMutex.Lock()
		n.lockMap[resource].ref--

    val attempt1 = attempt0.nextConnectionSpec(connectionSpecs, socket)
    assertThat(attempt1).isNotNull()
    assertThat(attempt1!!.isTlsFallback).isTrue()
    socket.close()

    // COMPATIBLE_TLS is used here.
    socket = createSocketWithEnabledProtocols(*enabledSocketTlsVersions)
    connectionSpecs[attempt1.connectionSpecIndex].apply(socket, attempt1.isTlsFallback)

	lc, _ := globalLifecycleSys.Get(o.Bucket)
	vc, _ := globalBucketVersioningSys.Get(o.Bucket)

	// Check if bucket is object locked.
	rcfg, _ := globalBucketObjectLockSys.Get(o.Bucket)
	replCfg, _, _ := globalBucketMetadataSys.GetReplicationConfig(ctx, o.Bucket)
	tgts, _ := globalBucketTargetSys.ListBucketTargets(ctx, o.Bucket)
	o.Lifecycle = lc
	o.Versioning = vc

We can't rely on application threads to read data from the socket. Application threads are transient: sometimes they're reading and writing and sometimes they're off doing application-layer things. But the socket is permanent, and it needs constant attention: we dispatch all incoming frames so the connection is good-to-go when the application layer needs it.

So we have a dedicated thread for every socket that just reads frames and dispatches them.

      .build()

  class SocketClosingEventListener : EventListener() {
    var shouldClose: Boolean = false
    var lastSocket: Socket? = null

    override fun connectionAcquired(
      call: Call,
      connection: Connection,
    ) {
      lastSocket = connection.socket()
    }

    override fun requestHeadersStart(call: Call) {
      if (shouldClose) {
        lastSocket!!.close()
      }
    }
  }

  override fun configureTlsExtensions(
    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<Protocol>,
  ) {
    // No TLS extensions if the socket class is custom.
    if (matchesSocket(sslSocket)) {
      try {
        // Enable session tickets.
        setUseSessionTickets.invoke(sslSocket, true)

        // Assume platform support on 24+

    applyConnectionSpec(connectionSpec, socket, false)
    assertArrayEquals(arrayOf("TLS_A", "TLS_C"), socket.enabledCipherSuites)
  }

  @Test
  fun applyIntersectionRetainsSslPrefixes() {
    val socket = FakeSslSocket()
    socket.enabledProtocols = arrayOf("TLSv1")
    socket.supportedCipherSuites =
      arrayOf("TLS_A", "TLS_B", "TLS_C", "TLS_D", "TLS_E")
    socket.enabledCipherSuites = arrayOf("TLS_A", "TLS_B", "TLS_C")

  var writeBytesMaximum: Long = peerSettings.initialWindowSize.toLong()
    private set

  internal val socket: BufferedSocket = builder.socket
  val writer = Http2Writer(socket.sink, client)

  // Visible for testing
  val readerRunnable = ReaderRunnable(Http2Reader(socket.source, client))

  // Guarded by this.
  private val currentPushRequests = mutableSetOf<Int>()

  init {

  html_url: https://github.com/nsidnev/fastapi-realworld-example-app
  stars: 2925
  owner_login: nsidnev
  owner_html_url: https://github.com/nsidnev
- name: uvicorn-gunicorn-fastapi-docker
  html_url: https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker
  stars: 2796
  owner_login: tiangolo
  owner_html_url: https://github.com/tiangolo
- name: best-of-web-python
  html_url: https://github.com/ml-tooling/best-of-web-python

  private fun readAndWriteFrames() {
    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()