}
  }

  interface Backend {
    fun nanoTime(): Long

    fun coordinatorNotify(taskRunner: TaskRunner)

    fun coordinatorWait(
      taskRunner: TaskRunner,
      nanos: Long,
    )

    fun <T> decorate(queue: BlockingQueue<T>): BlockingQueue<T>

    fun execute(
      taskRunner: TaskRunner,
      runnable: Runnable,
    )
  }

  class RealBackend(

  /** A task runner that posts tasks to this fake. Tasks won't be executed until requested. */
  val taskRunner: TaskRunner =
    TaskRunner(
      object : TaskRunner.Backend {
        override fun execute(
          taskRunner: TaskRunner,
          runnable: Runnable,
        ) {
          taskRunner.assertLockHeld()

          val queuedTask = RunnableSerialTask(runnable)
          serialTaskQueue += queuedTask

import okhttp3.internal.concurrent.TaskQueue
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.assertLockHeld
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.connection.RealCall.CallReference
import okhttp3.internal.okHttpName
import okhttp3.internal.platform.Platform

class RealConnectionPool internal constructor(
  taskRunner: TaskRunner,
  /** The maximum number of idle connections across all addresses. */

 *
 * Each step may fail. If a retry is possible, a new instance is created with the next plan, which
 * will be configured differently.
 */
class ConnectPlan internal constructor(
  private val taskRunner: TaskRunner,
  private val connectionPool: RealConnectionPool,
  private val readTimeoutMillis: Int,
  private val writeTimeoutMillis: Int,
  private val socketConnectTimeoutMillis: Int,

  /** For scheduling everything asynchronous. */
  private val taskRunner = builder.taskRunner

  /** Asynchronously writes frames to the outgoing socket. */
  private val writerQueue = taskRunner.newQueue()

  /** Ensures push promise callbacks events are sent in order per stream. */
  private val pushQueue = taskRunner.newQueue()

  /** Notifies the listener of settings changes. */

  private val taskRunner = taskFaker.taskRunner

  /**
   * Note that we don't use the same [TaskFaker] for this factory. That way off-topic tasks like
   * connection pool maintenance tasks don't add noise to route planning tests.
   */
  private val routePlanner = FakeRoutePlanner(taskFaker = taskFaker)
  private val finder = FastFallbackExchangeFinder(routePlanner, taskRunner)

  @AfterEach
  fun tearDown() {

  @RegisterExtension @JvmField
  val testLogHandler = TestLogHandler(taskFaker.logger)

  private val taskRunner = taskFaker.taskRunner
  private val log = mutableListOf<String>()
  private val redQueue = taskRunner.newQueue()
  private val blueQueue = taskRunner.newQueue()
  private val greenQueue = taskRunner.newQueue()

  @AfterEach
  internal fun tearDown() {
    taskFaker.close()
  }

    if (isLoom()) {
      val backend = TaskRunner.RealBackend(loomThreadFactory())
      val taskRunner = TaskRunner(backend)

      OkHttpClient
        .Builder()
        .connectionPool(
          buildConnectionPool(
            connectionListener = connectionListener,
            taskRunner = taskRunner,
          ),
        ).dispatcher(Dispatcher(backend.executor))

 * in sequence.
 */
public class MockWebServer : Closeable {
  private val taskRunnerBackend =
    TaskRunner.RealBackend(
      threadFactory("MockWebServer TaskRunner", daemon = false),
    )
  private val taskRunner = TaskRunner(taskRunnerBackend)
  private val requestQueue = LinkedBlockingQueue<RecordedRequest>()
  private val openClientSockets =

 *
 * Connections are shared in a connection pool. Accesses to the connection's state must be guarded
 * by holding a lock on the connection.
 */
class RealConnection internal constructor(
  val taskRunner: TaskRunner,
  val connectionPool: RealConnectionPool,
  override val route: Route,
  /** The low-level TCP socket. */
  private val rawSocket: JavaNetSocket,
  /**