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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_IMPL_H_ | 5 #ifndef CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_ |
6 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_ | 6 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <string> | |
9 | 10 |
10 #include "base/macros.h" | 11 #include "base/macros.h" |
11 #include "content/browser/indexed_db/leveldb/leveldb_iterator.h" | 12 #include "content/browser/indexed_db/leveldb/leveldb_iterator.h" |
12 #include "content/common/content_export.h" | 13 #include "content/common/content_export.h" |
13 #include "third_party/leveldatabase/src/include/leveldb/iterator.h" | 14 #include "third_party/leveldatabase/src/include/leveldb/iterator.h" |
14 | 15 |
16 namespace leveldb { | |
17 class Snapshot; | |
18 } | |
19 | |
15 namespace content { | 20 namespace content { |
21 class LevelDBIteratorPoolController; | |
16 | 22 |
17 class CONTENT_EXPORT LevelDBIteratorImpl : public content::LevelDBIterator { | 23 class CONTENT_EXPORT LevelDBIteratorImpl : public content::LevelDBIterator { |
18 public: | 24 public: |
19 ~LevelDBIteratorImpl() override; | 25 ~LevelDBIteratorImpl() override; |
20 bool IsValid() const override; | 26 bool IsValid() const override; |
21 leveldb::Status SeekToLast() override; | 27 leveldb::Status SeekToLast() override; |
22 leveldb::Status Seek(const base::StringPiece& target) override; | 28 leveldb::Status Seek(const base::StringPiece& target) override; |
23 leveldb::Status Next() override; | 29 leveldb::Status Next() override; |
24 leveldb::Status Prev() override; | 30 leveldb::Status Prev() override; |
25 base::StringPiece Key() const override; | 31 base::StringPiece Key() const override; |
26 base::StringPiece Value() const override; | 32 base::StringPiece Value() const override; |
33 void PurgeMemory() override; | |
pwnall
2017/03/24 09:16:03
I saw the earlier comments regarding these two nam
dmurph
2017/03/24 23:33:39
Done.
| |
34 bool IsEvicted() const override; | |
27 | 35 |
28 protected: | 36 protected: |
29 explicit LevelDBIteratorImpl(std::unique_ptr<leveldb::Iterator> iterator); | 37 explicit LevelDBIteratorImpl(std::unique_ptr<leveldb::Iterator> iterator, |
38 LevelDBIteratorPoolController* pool_controller, | |
39 const leveldb::Snapshot* snapshot); | |
30 | 40 |
31 private: | 41 private: |
42 enum class IteratorState { ACTIVE, EVICTED_AND_VALID, EVICTED_AND_INVALID }; | |
43 | |
32 void CheckStatus(); | 44 void CheckStatus(); |
33 | 45 |
46 void RecordUsage(); | |
47 void RestoreDBIteratorIfEvicted(); | |
48 | |
34 friend class IndexedDBClassFactory; | 49 friend class IndexedDBClassFactory; |
35 friend class MockBrowserTestIndexedDBClassFactory; | 50 friend class MockBrowserTestIndexedDBClassFactory; |
36 | 51 |
37 std::unique_ptr<leveldb::Iterator> iterator_; | 52 std::unique_ptr<leveldb::Iterator> iterator_; |
38 | 53 |
54 // Variables to facilitate memory purging. | |
55 LevelDBIteratorPoolController* pool_controller_; | |
56 IteratorState iterator_state_ = IteratorState::ACTIVE; | |
57 std::string key_before_eviction_; | |
58 const leveldb::Snapshot* snapshot_; | |
59 | |
39 DISALLOW_COPY_AND_ASSIGN(LevelDBIteratorImpl); | 60 DISALLOW_COPY_AND_ASSIGN(LevelDBIteratorImpl); |
40 }; | 61 }; |
41 | 62 |
42 } // namespace content | 63 } // namespace content |
43 | 64 |
44 #endif // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_ | 65 #endif // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_ |
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