foedus::storage::hash::SortEntry Struct Reference

Used in sort_batch(). More...

Detailed Description

Used in sort_batch().

• 0-5 bytes: HashBin, the most significant.
• 6-7 bytes: compressed epoch (difference from base_epoch)
• 8-11 bytes: in-epoch-ordinal
• 12-15 bytes: BufferPosition (doesn't have to be sorted together, but for simplicity) Be careful on endian! We use uint128_t to make it easier and faster.

Definition at line 212 of file hash_partitioner_impl.cpp.

Public Member Functions
void	set (HashBin bin, uint16_t compressed_epoch, uint32_t in_epoch_ordinal, snapshot::BufferPosition position) __attribute__((always_inline))
HashBin	get_bin () const __attribute__((always_inline))
snapshot::BufferPosition	get_position () const __attribute__((always_inline))

Public Attributes
__uint128_t	data_

Member Function Documentation

HashBin foedus::storage::hash::SortEntry::get_bin ( ) const

inline

Definition at line 225 of file hash_partitioner_impl.cpp.

References data_.

                                               {
    return static_cast<HashBin>(data_ >> 80);
  }

snapshot::BufferPosition foedus::storage::hash::SortEntry::get_position ( ) const

inline

Definition at line 228 of file hash_partitioner_impl.cpp.

References data_.

Referenced by foedus::storage::hash::compact_logs().

                                                                   {
    return static_cast<snapshot::BufferPosition>(data_);
  }

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void foedus::storage::hash::SortEntry::set ( HashBin  bin, uint16_t  compressed_epoch, uint32_t  in_epoch_ordinal, snapshot::BufferPosition  position  )

inline

Definition at line 213 of file hash_partitioner_impl.cpp.

References ASSERT_ND, data_, and foedus::storage::hash::kHashMaxBinBits.

Referenced by foedus::storage::hash::prepare_sort_entries().

                                                    {
    ASSERT_ND(bin < (1ULL << kHashMaxBinBits));
    data_
      = static_cast<__uint128_t>(bin) << 80
        | static_cast<__uint128_t>(compressed_epoch) << 64
        | static_cast<__uint128_t>(in_epoch_ordinal) << 32
        | static_cast<__uint128_t>(position);
  }

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Member Data Documentation

__uint128_t foedus::storage::hash::SortEntry::data_

Definition at line 231 of file hash_partitioner_impl.cpp.

Referenced by get_bin(), get_position(), and set().

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The documentation for this struct was generated from the following file:

• /home/shino/foedus_code/foedus-core/src/foedus/storage/hash/hash_partitioner_impl.cpp