DpdkMempool.hpp

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#ifndef DPDKLIBS_INCLUDE_DPDKLIBS_DPDKMEMPOOL_HPP_
#define DPDKLIBS_INCLUDE_DPDKLIBS_DPDKMEMPOOL_HPP_
 
#include <rte_mempool.h>
 
#include <map>
#include <memory>
 
namespace dunedaq::dpdklibs {
 
struct MempoolDeleter
{
  // No-op for a null handle.
  void operator()(rte_mempool* pool) const noexcept;
};
 
using unique_mempool = std::unique_ptr<rte_mempool, MempoolDeleter>;
 
// Move a pool from a default-deleting unique_ptr into unique_mempool.  The
// default deleter never runs.
unique_mempool
take_mempool_ownership(std::unique_ptr<rte_mempool>&& legacy);
 
class BorrowedPoolMap
{
public:
  BorrowedPoolMap() = default;
  BorrowedPoolMap(const BorrowedPoolMap&) = delete;
  BorrowedPoolMap& operator=(const BorrowedPoolMap&) = delete;
  BorrowedPoolMap(BorrowedPoolMap&&) = delete;
  BorrowedPoolMap& operator=(BorrowedPoolMap&&) = delete;
 
  // Releases every entry.  No deleter runs on a borrowed pool.
  ~BorrowedPoolMap();
 
  void borrow(int index, rte_mempool* pool);
 
  std::map<int, std::unique_ptr<rte_mempool>>& get();
 
private:
  std::map<int, std::unique_ptr<rte_mempool>> m_map;
};
 
} // namespace dunedaq::dpdklibs
 
#endif // DPDKLIBS_INCLUDE_DPDKLIBS_DPDKMEMPOOL_HPP_