!socketSourceOpen
        callDone = allStreamsDone && !expectMoreExchanges
      }
    }

    if (allStreamsDone) {
      this.exchange = null
      this.connection?.incrementSuccessCount()
    }

    if (callDone) {
      return callDone(e)
    }

    return e
  }

  internal fun noMoreExchanges(e: IOException?): IOException? {
    var callDone = false

  internal fun noCoalescedConnections() {
    withLock {
      noCoalescedConnections = true
    }
  }

  internal fun incrementSuccessCount() {
    withLock {
      successCount++
    }
  }

  @Throws(IOException::class)
  fun start() {
    idleAtNs = System.nanoTime()