github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/c-deps/libroach/iterator.h (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  #pragma once
    12  
    13  #include <atomic>
    14  #include <memory>
    15  #include <rocksdb/iterator.h>
    16  #include <rocksdb/write_batch.h>
    17  #include "chunked_buffer.h"
    18  
    19  struct DBIterator {
    20    DBIterator(std::atomic<int64_t>* iters, DBIterOptions iter_options);
    21    ~DBIterator();
    22    void SetLowerBound(DBKey key);
    23    void SetUpperBound(DBKey key);
    24  
    25    std::atomic<int64_t>* const iters_count;
    26    std::unique_ptr<rocksdb::Iterator> rep;
    27    std::unique_ptr<cockroach::chunkedBuffer> kvs;
    28    std::unique_ptr<rocksdb::WriteBatch> intents;
    29    std::unique_ptr<IteratorStats> stats;
    30    std::string rev_resume_key;
    31  
    32    rocksdb::ReadOptions read_opts;
    33    std::string lower_bound_str;
    34    std::string upper_bound_str;
    35    rocksdb::Slice lower_bound;
    36    rocksdb::Slice upper_bound;
    37  };