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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_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ | 5 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ |
6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ | 6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <set> | 9 #include <set> |
10 #include <utility> | 10 #include <utility> |
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36 int64 blob_key); | 36 int64 blob_key); |
37 // This closure holds a raw pointer to the IndexedDBActiveBlobRegistry, | 37 // This closure holds a raw pointer to the IndexedDBActiveBlobRegistry, |
38 // and may not be called after it is deleted. | 38 // and may not be called after it is deleted. |
39 base::Closure GetAddBlobRefCallback(int64 database_id, int64 blob_key); | 39 base::Closure GetAddBlobRefCallback(int64 database_id, int64 blob_key); |
40 // Call this to force the registry to drop its use counts, permitting the | 40 // Call this to force the registry to drop its use counts, permitting the |
41 // factory to drop any blob-related refcount for the backing store. | 41 // factory to drop any blob-related refcount for the backing store. |
42 // This will also turn any outstanding callbacks into no-ops. | 42 // This will also turn any outstanding callbacks into no-ops. |
43 void ForceShutdown(); | 43 void ForceShutdown(); |
44 | 44 |
45 private: | 45 private: |
| 46 // Maps blob_key -> IsDeleted; if the record's absent, it's not in active use |
| 47 // and we don't care if it's deleted. |
| 48 typedef std::map<int64, bool> SingleDBMap; |
| 49 // Maps DB ID -> SingleDBMap |
| 50 typedef std::map<int64, SingleDBMap> AllDBsMap; |
| 51 typedef std::set<int64> DeletedDBSet; |
| 52 |
46 void AddBlobRef(int64 database_id, int64 blob_key); | 53 void AddBlobRef(int64 database_id, int64 blob_key); |
47 void ReleaseBlobRef(int64 database_id, int64 blob_key); | 54 void ReleaseBlobRef(int64 database_id, int64 blob_key); |
48 static void ReleaseBlobRefThreadSafe( | 55 static void ReleaseBlobRefThreadSafe( |
49 scoped_refptr<base::TaskRunner> task_runner, | 56 scoped_refptr<base::TaskRunner> task_runner, |
50 base::WeakPtr<IndexedDBActiveBlobRegistry> weak_ptr, | 57 base::WeakPtr<IndexedDBActiveBlobRegistry> weak_ptr, |
51 int64 database_id, | 58 int64 database_id, |
52 int64 blob_key, | 59 int64 blob_key, |
53 const base::FilePath& unused); | 60 const base::FilePath& unused); |
54 | 61 |
55 // Maps blob_key -> IsDeleted; if the record's absent, it's not in active use | |
56 // and we don't care if it's deleted. | |
57 typedef std::map<int64, bool> SingleDBMap; | |
58 // Maps DB ID -> SingleDBMap | |
59 typedef std::map<int64, SingleDBMap> AllDBsMap; | |
60 typedef std::set<int64> DeletedDBSet; | |
61 | |
62 AllDBsMap use_tracker_; | 62 AllDBsMap use_tracker_; |
63 DeletedDBSet deleted_dbs_; | 63 DeletedDBSet deleted_dbs_; |
64 // As long as we've got blobs registered in use_tracker_, | 64 // As long as we've got blobs registered in use_tracker_, |
65 // backing_store_->factory() will keep backing_store_ alive for us. And | 65 // backing_store_->factory() will keep backing_store_ alive for us. And |
66 // backing_store_ owns us, so we'll stay alive as long as we're needed. | 66 // backing_store_ owns us, so we'll stay alive as long as we're needed. |
67 IndexedDBBackingStore* backing_store_; | 67 IndexedDBBackingStore* backing_store_; |
68 base::WeakPtrFactory<IndexedDBActiveBlobRegistry> weak_factory_; | 68 base::WeakPtrFactory<IndexedDBActiveBlobRegistry> weak_factory_; |
69 | 69 |
70 DISALLOW_COPY_AND_ASSIGN(IndexedDBActiveBlobRegistry); | 70 DISALLOW_COPY_AND_ASSIGN(IndexedDBActiveBlobRegistry); |
71 }; | 71 }; |
72 | 72 |
73 } // namespace content | 73 } // namespace content |
74 | 74 |
75 #endif // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ | 75 #endif // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_ACTIVE_BLOB_REGISTRY_H_ |
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