Method push_front

src/msg/async/dpdk/circular_buffer.h:270–275

template <typename T, typename Alloc>
inline void circular_buffer<T, Alloc>::push_front(const T& data) {
  maybe_expand();
  auto p = &_impl.storage[mask(_impl.begin - 1)];
  _impl.construct(p, data);
  --_impl.begin;
}

template <typename T, typename Alloc>
inline void circular_buffer<T, Alloc>::push_front(T&& data) {