36a5f8ed7f
- Replace raw slice comparison with a call to user comparator.
Added test for custom comparators.
- Fix end of namespace comments.
- Fixed bug in picking inputs for a level-0 compaction.
When finding overlapping files, the covered range may expand
as files are added to the input set. We now correctly expand
the range when this happens instead of continuing to use the
old range. For example, suppose L0 contains files with the
following ranges:
F1: a .. d
F2: c .. g
F3: f .. j
and the initial compaction target is F3. We used to search
for range f..j which yielded {F2,F3}. However we now expand
the range as soon as another file is added. In this case,
when F2 is added, we expand the range to c..j and restart the
search. That picks up file F1 as well.
This change fixes a bug related to deleted keys showing up
incorrectly after a compaction as described in Issue 44.
(Sync with upstream @25072954)
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
//
|
|
// Thread-safe (provides internal synchronization)
|
|
|
|
#ifndef STORAGE_LEVELDB_DB_TABLE_CACHE_H_
|
|
#define STORAGE_LEVELDB_DB_TABLE_CACHE_H_
|
|
|
|
#include <string>
|
|
#include <stdint.h>
|
|
#include "db/dbformat.h"
|
|
#include "leveldb/cache.h"
|
|
#include "leveldb/table.h"
|
|
#include "port/port.h"
|
|
|
|
namespace leveldb {
|
|
|
|
class Env;
|
|
|
|
class TableCache {
|
|
public:
|
|
TableCache(const std::string& dbname, const Options* options, int entries);
|
|
~TableCache();
|
|
|
|
// Return an iterator for the specified file number (the corresponding
|
|
// file length must be exactly "file_size" bytes). If "tableptr" is
|
|
// non-NULL, also sets "*tableptr" to point to the Table object
|
|
// underlying the returned iterator, or NULL if no Table object underlies
|
|
// the returned iterator. The returned "*tableptr" object is owned by
|
|
// the cache and should not be deleted, and is valid for as long as the
|
|
// returned iterator is live.
|
|
Iterator* NewIterator(const ReadOptions& options,
|
|
uint64_t file_number,
|
|
uint64_t file_size,
|
|
Table** tableptr = NULL);
|
|
|
|
// Evict any entry for the specified file number
|
|
void Evict(uint64_t file_number);
|
|
|
|
private:
|
|
Env* const env_;
|
|
const std::string dbname_;
|
|
const Options* options_;
|
|
Cache* cache_;
|
|
};
|
|
|
|
} // namespace leveldb
|
|
|
|
#endif // STORAGE_LEVELDB_DB_TABLE_CACHE_H_
|