ceph/src/rocksdb/memtable/hash_linklist_rep.h

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
   6 // Use of this source code is governed by a BSD-style license that can be
   7 // found in the LICENSE file. See the AUTHORS file for names of contributors.
   8
   9 #pragma once
  10 #ifndef ROCKSDB_LITE
  11 #include "rocksdb/slice_transform.h"
  12 #include "rocksdb/memtablerep.h"
  13
  14 namespace rocksdb {
  15
  16 class HashLinkListRepFactory : public MemTableRepFactory {
  17  public:
  18   explicit HashLinkListRepFactory(size_t bucket_count,
  19                                   uint32_t threshold_use_skiplist,
  20                                   size_t huge_page_tlb_size,
  21                                   int bucket_entries_logging_threshold,
  22                                   bool if_log_bucket_dist_when_flash)
  23       : bucket_count_(bucket_count),
  24         threshold_use_skiplist_(threshold_use_skiplist),
  25         huge_page_tlb_size_(huge_page_tlb_size),
  26         bucket_entries_logging_threshold_(bucket_entries_logging_threshold),
  27         if_log_bucket_dist_when_flash_(if_log_bucket_dist_when_flash) {}
  28
  29   virtual ~HashLinkListRepFactory() {}
  30
  31   using MemTableRepFactory::CreateMemTableRep;
  32   virtual MemTableRep* CreateMemTableRep(
  33       const MemTableRep::KeyComparator& compare, Allocator* allocator,
  34       const SliceTransform* transform, Logger* logger) override;
  35
  36   virtual const char* Name() const override {
  37     return "HashLinkListRepFactory";
  38   }
  39
  40  private:
  41   const size_t bucket_count_;
  42   const uint32_t threshold_use_skiplist_;
  43   const size_t huge_page_tlb_size_;
  44   int bucket_entries_logging_threshold_;
  45   bool if_log_bucket_dist_when_flash_;
  46 };
  47
  48 }
  49 #endif  // ROCKSDB_LITE