void sessionHandleWrite(SessionSharedPtr ptr, const boost::system::error_code& error)
{
  if (error)
  {
    ptr->disconnect();
  }
  else
  {
    ptr->mIsWritting = false;
    assert(!ptr->mIsWritting);

    ptr->writeNext();
  }
}

void Session::writeNext()
{
  if (mIsWritting || !mPacketsToBeSend.pop(mSendingPacket))
  {
    return;
  }

  assert(!mIsWritting);
  mIsWritting = true;

  assert(mIsWritting);
  asio::async_write(mSocket, asio::buffer(mSendingPacket.data(), mSendingPacket.size()),
                    boost::bind(sessionHandleWrite, shared_from_this(), asio::placeholders::error));
}