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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 WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ | 5 #ifndef WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ |
6 #define WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ | 6 #define WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
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21 class BlobData; | 21 class BlobData; |
22 class BlobStorageContext; | 22 class BlobStorageContext; |
23 | 23 |
24 // A scoper object for use in chrome's main browser process, ensures | 24 // A scoper object for use in chrome's main browser process, ensures |
25 // the underlying BlobData and its uuid remain in BlobStorageContext's | 25 // the underlying BlobData and its uuid remain in BlobStorageContext's |
26 // collection for the duration. This object has delete semantics and | 26 // collection for the duration. This object has delete semantics and |
27 // maybe deleted on any thread. | 27 // maybe deleted on any thread. |
28 class WEBKIT_STORAGE_BROWSER_EXPORT BlobDataHandle | 28 class WEBKIT_STORAGE_BROWSER_EXPORT BlobDataHandle |
29 : public base::SupportsUserData::Data { | 29 : public base::SupportsUserData::Data { |
30 public: | 30 public: |
31 BlobDataHandle(const BlobDataHandle& other); // May be copied on any thread. | |
32 virtual ~BlobDataHandle(); // Maybe be deleted on any thread. | 31 virtual ~BlobDataHandle(); // Maybe be deleted on any thread. |
33 BlobData* data() const; // May only be accessed on the IO thread. | 32 BlobData* data() const; // May only be accessed on the IO thread. |
34 | 33 |
35 std::string uuid() const; // May be accessed on any thread. | |
36 | |
37 private: | 34 private: |
38 class BlobDataHandleShared | |
39 : public base::RefCountedThreadSafe<BlobDataHandleShared> { | |
40 public: | |
41 BlobDataHandleShared(BlobData* blob_data, | |
42 BlobStorageContext* context, | |
43 base::SequencedTaskRunner* task_runner); | |
44 | |
45 BlobData* data() const; | |
46 const std::string& uuid() const; | |
47 | |
48 private: | |
49 friend class base::DeleteHelper<BlobDataHandleShared>; | |
50 friend class base::RefCountedThreadSafe<BlobDataHandleShared>; | |
51 friend class BlobDataHandle; | |
52 | |
53 virtual ~BlobDataHandleShared(); | |
54 | |
55 scoped_refptr<BlobData> blob_data_; | |
56 base::WeakPtr<BlobStorageContext> context_; | |
57 | |
58 DISALLOW_COPY_AND_ASSIGN(BlobDataHandleShared); | |
59 }; | |
60 | |
61 friend class BlobStorageContext; | 35 friend class BlobStorageContext; |
62 BlobDataHandle(BlobData* blob_data, BlobStorageContext* context, | 36 BlobDataHandle(BlobData* blob_data, BlobStorageContext* context, |
63 base::SequencedTaskRunner* task_runner); | 37 base::SequencedTaskRunner* task_runner); |
64 | 38 |
| 39 static void DeleteHelper( |
| 40 base::WeakPtr<BlobStorageContext> context, |
| 41 BlobData* blob_data); |
| 42 |
| 43 BlobData* blob_data_; // Intentionally a raw ptr to a non-thread-safe ref. |
| 44 base::WeakPtr<BlobStorageContext> context_; |
65 scoped_refptr<base::SequencedTaskRunner> io_task_runner_; | 45 scoped_refptr<base::SequencedTaskRunner> io_task_runner_; |
66 scoped_refptr<BlobDataHandleShared> shared_; | 46 |
| 47 DISALLOW_COPY_AND_ASSIGN(BlobDataHandle); |
67 }; | 48 }; |
68 | 49 |
69 } // namespace webkit_blob | 50 } // namespace webkit_blob |
70 | 51 |
71 #endif // WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ | 52 #endif // WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_ |
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