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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ | 5 #ifndef CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ |
6 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ | 6 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ |
7 | 7 |
8 #include "base/strings/string_piece.h" | 8 #include "base/strings/string_piece.h" |
9 #include "content/common/content_export.h" | 9 #include "content/common/content_export.h" |
10 #include "third_party/leveldatabase/src/include/leveldb/status.h" | 10 #include "third_party/leveldatabase/src/include/leveldb/status.h" |
11 | 11 |
12 namespace content { | 12 namespace content { |
13 | 13 |
14 class CONTENT_EXPORT LevelDBIterator { | 14 class CONTENT_EXPORT LevelDBIterator { |
15 public: | 15 public: |
16 virtual ~LevelDBIterator() {} | 16 virtual ~LevelDBIterator() {} |
17 virtual bool IsValid() const = 0; | 17 virtual bool IsValid() const = 0; |
18 virtual leveldb::Status SeekToLast() = 0; | 18 virtual leveldb::Status SeekToLast() = 0; |
19 virtual leveldb::Status Seek(const base::StringPiece& target) = 0; | 19 virtual leveldb::Status Seek(const base::StringPiece& target) = 0; |
20 virtual leveldb::Status Next() = 0; | 20 virtual leveldb::Status Next() = 0; |
21 virtual leveldb::Status Prev() = 0; | 21 virtual leveldb::Status Prev() = 0; |
22 virtual base::StringPiece Key() const = 0; | 22 virtual base::StringPiece Key() const = 0; |
23 virtual base::StringPiece Value() const = 0; | 23 virtual base::StringPiece Value() const = 0; |
| 24 virtual void PurgeMemory() {}; |
| 25 virtual bool IsEvicted() const; |
24 }; | 26 }; |
25 | 27 |
26 } // namespace content | 28 } // namespace content |
27 | 29 |
28 #endif // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ | 30 #endif // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_ |
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