DpdkTxBackend.hpp

Go to the documentation of this file.

#ifndef DPDKLIBS_INCLUDE_DPDKLIBS_SENDER_DPDKTXBACKEND_HPP_
#define DPDKLIBS_INCLUDE_DPDKLIBS_SENDER_DPDKTXBACKEND_HPP_
 
#include <rte_mempool.h>
 
#include <cstddef>
#include <cstdint>
 
namespace dunedaq::dpdklibs::sender {
 
struct DpdkTxBackend
{
  rte_mempool* pool = nullptr;
  std::uint16_t port = 0;  // NOLINT(build/unsigned)
  std::uint16_t queue = 0; // NOLINT(build/unsigned)
 
  // Returns nullptr if the pool is exhausted.
  void* alloc();
 
  // Appends bytes to the mbuf and sets l2_len, l3_len and l4_len.  Returns the
  // start of the appended region, or nullptr if the tailroom is smaller than
  // bytes.
  std::uint8_t* prepare(void* buf, std::size_t bytes); // NOLINT(build/unsigned)
 
  // Enqueues one mbuf.  Returns false if the TX ring did not accept it, in
  // which case the caller still owns buf.
  bool transmit(void* buf);
 
  void free(void* buf);
};
 
} // namespace dunedaq::dpdklibs::sender
 
#endif // DPDKLIBS_INCLUDE_DPDKLIBS_SENDER_DPDKTXBACKEND_HPP_