Method read

app/src/IO/CircularBuffer.h:272–293

 */
template<typename T, Concepts::ByteLike StorageType>
T IO::CircularBuffer<T, StorageType>::read(qsizetype size)
{
  const qsizetype current_size = this->size();
  Q_ASSERT(size <= current_size);
  if (size > current_size) [[unlikely]]
    return T{};

  T result;
  result.resize(size);

  const qsizetype head       = m_head.load(std::memory_order_relaxed);
  const qsizetype firstChunk = std::min(size, m_capacity - head);
  std::memcpy(result.data(), &m_buffer[head], firstChunk);

  if (size > firstChunk) [[unlikely]]
    std::memcpy(result.data() + firstChunk, &m_buffer[0], size - firstChunk);

  const qsizetype new_head = (head + size) & m_capacityMask;
  m_head.store(new_head, std::memory_order_release);

  return result;
}

/**
 * @brief Advances the read head by N bytes without copying. Cheaper than