ceph/src/rocksdb/memtable/stl_wrappers.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 #pragma once
   6
   7 #include <map>
   8 #include <string>
   9
  10 #include "rocksdb/comparator.h"
  11 #include "rocksdb/memtablerep.h"
  12 #include "rocksdb/slice.h"
  13 #include "util/coding.h"
  14
  15 namespace rocksdb {
  16 namespace stl_wrappers {
  17
  18 class Base {
  19  protected:
  20   const MemTableRep::KeyComparator& compare_;
  21   explicit Base(const MemTableRep::KeyComparator& compare)
  22       : compare_(compare) {}
  23 };
  24
  25 struct Compare : private Base {
  26   explicit Compare(const MemTableRep::KeyComparator& compare) : Base(compare) {}
  27   inline bool operator()(const char* a, const char* b) const {
  28     return compare_(a, b) < 0;
  29   }
  30 };
  31
  32 }
  33 }