while (bytesLeft > 0) {
      if (bytesWrittenSinceLastDelay == bytesPerPeriod) {
        flush()
        socket.sleepWhileOpen(periodDelayNanos)
        bytesWrittenSinceLastDelay = 0
      }

      val toWrite = minOf(bytesLeft, bytesPerPeriod - bytesWrittenSinceLastDelay)
      bytesWrittenSinceLastDelay += toWrite
      bytesLeft -= toWrite
      delegate.write(source, toWrite)
    }
  }

    requestHeaders: List<Header>,
  ) {
    withLock {
      if (closed) throw IOException("closed")
      hpackWriter.writeHeaders(requestHeaders)

      val byteCount = hpackBuffer.size
      val length = minOf(maxFrameSize - 4L, byteCount).toInt()
      frameHeader(
        streamId = streamId,
        length = length + 4,
        type = TYPE_PUSH_PROMISE,

      var i = 0
      val length = logMessage.length
      while (i < length) {
        var newline = logMessage.indexOf('\n', i)
        newline = if (newline != -1) newline else length
        do {
          val end = minOf(newline, i + MAX_LOG_LENGTH)
          Log.println(logLevel, tag, logMessage.substring(i, end))
          i = end
        } while (i < newline)
        i++
      }
    }
  }

      val toIndex = minOf(source.buffer.size, maxByteCount) + 1L
      val boundaryIndex =
        source.indexOf(
          bytes = crlfDashDashBoundary,
          fromIndex = 0L,
          toIndex = toIndex,
        )
      return when {
        boundaryIndex != -1L -> boundaryIndex // We found the boundary.
        source.buffer.size >= toIndex -> minOf(toIndex, maxByteCount) // No boundary before toIndex.

          val bytesToRead = minOf(byteCount, upstreamPos - sourcePos)
          buffer.copyTo(sink, sourcePos - bufferPos, bytesToRead)
          sourcePos += bytesToRead
          return bytesToRead
        }

      // Read from the file.
      if (source == SOURCE_FILE) {
        val bytesToRead = minOf(byteCount, upstreamPos - sourcePos)

      byteCount: Long,
    ): Long {
      require(byteCount >= 0L) { "byteCount < 0: $byteCount" }
      check(!closed) { "closed" }
      if (bytesRemaining == 0L) return -1

      val read = super.read(sink, minOf(bytesRemaining, byteCount))
      if (read == -1L) {
        carrier.noNewExchanges() // The server didn't supply the promised content length.
        val e = ProtocolException("unexpected end of stream")

        val effectiveHeaderTableSize = minOf(headerTableSizeSetting, SETTINGS_HEADER_TABLE_SIZE_LIMIT)

        if (maxDynamicTableByteCount == effectiveHeaderTableSize) return // No change.

        if (effectiveHeaderTableSize < maxDynamicTableByteCount) {
          smallestHeaderTableSizeSetting =
            minOf(smallestHeaderTableSizeSetting, effectiveHeaderTableSize)
        }

    maxChunkSize: Int,
  ) = apply {
    removeHeader("Content-Length")
    headersBuilder.add(CHUNKED_BODY_HEADER)

    val bytesOut = Buffer()
    while (!body.exhausted()) {
      val chunkSize = minOf(body.size, maxChunkSize.toLong())
      bytesOut.writeHexadecimalUnsignedLong(chunkSize)
      bytesOut.writeUtf8("\r\n")
      bytesOut.write(body, chunkSize)
      bytesOut.writeUtf8("\r\n")
    }

        val candidateDelay = maxOf(0L, candidate.nextExecuteNanoTime - now)

        when {
          // Compute the delay of the soonest-executable task.
          candidateDelay > 0L -> {
            minDelayNanos = minOf(candidateDelay, minDelayNanos)
            continue@eachQueue
          }

          // If we already have more than one task, that's enough work for now. Stop searching.
          readyTask != null -> {

            } else if (readBuffer.size > 0L) {
              // Prepare to read bytes. Start by moving them to the caller's buffer.
              readBytesDelivered = readBuffer.read(sink, minOf(byteCount, readBuffer.size))
              readBytes.update(total = readBytesDelivered)

              val unacknowledgedBytesRead = readBytes.unacknowledged
              if (errorExceptionToDeliver == null &&