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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2015 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 STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ | 5 #ifndef STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ |
6 #define STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ | 6 #define STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <memory> | 10 #include <memory> |
11 #include <ostream> | 11 #include <ostream> |
12 #include <string> | 12 #include <string> |
13 | 13 |
14 #include "base/memory/ref_counted.h" | 14 #include "base/memory/ref_counted.h" |
15 #include "storage/browser/storage_browser_export.h" | 15 #include "storage/browser/storage_browser_export.h" |
16 #include "storage/common/data_element.h" | 16 #include "storage/common/data_element.h" |
17 | 17 |
18 namespace disk_cache { | 18 namespace disk_cache { |
19 class Entry; | 19 class Entry; |
20 } | 20 } |
21 | 21 |
22 namespace storage { | 22 namespace storage { |
23 class BlobDataBuilder; | 23 class BlobDataBuilder; |
| 24 class BlobMemoryController; |
24 class BlobStorageContext; | 25 class BlobStorageContext; |
25 | 26 |
26 // Ref counted blob item. This class owns the backing data of the blob item. The | 27 // Ref counted blob item. This class owns the backing data of the blob item. The |
27 // backing data is immutable, and cannot change after creation. The purpose of | 28 // backing data is immutable, and cannot change after creation. The purpose of |
28 // this class is to allow the resource to stick around in the snapshot even | 29 // this class is to allow the resource to stick around in the snapshot even |
29 // after the resource was swapped in the blob (either to disk or to memory) by | 30 // after the resource was swapped in the blob (either to disk or to memory) by |
30 // the BlobStorageContext. | 31 // the BlobStorageContext. |
31 class STORAGE_EXPORT BlobDataItem : public base::RefCounted<BlobDataItem> { | 32 class STORAGE_EXPORT BlobDataItem : public base::RefCounted<BlobDataItem> { |
32 public: | 33 public: |
33 // The DataHandle class is used to persist resources that are needed for | 34 // The DataHandle class is used to persist resources that are needed for |
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58 DataElement* data_element_ptr() { return item_.get(); } | 59 DataElement* data_element_ptr() { return item_.get(); } |
59 | 60 |
60 disk_cache::Entry* disk_cache_entry() const { return disk_cache_entry_; } | 61 disk_cache::Entry* disk_cache_entry() const { return disk_cache_entry_; } |
61 int disk_cache_stream_index() const { return disk_cache_stream_index_; } | 62 int disk_cache_stream_index() const { return disk_cache_stream_index_; } |
62 int disk_cache_side_stream_index() const { | 63 int disk_cache_side_stream_index() const { |
63 return disk_cache_side_stream_index_; | 64 return disk_cache_side_stream_index_; |
64 } | 65 } |
65 | 66 |
66 private: | 67 private: |
67 friend class BlobDataBuilder; | 68 friend class BlobDataBuilder; |
| 69 friend class BlobMemoryController; |
68 friend class BlobStorageContext; | 70 friend class BlobStorageContext; |
69 friend class base::RefCounted<BlobDataItem>; | 71 friend class base::RefCounted<BlobDataItem>; |
70 friend STORAGE_EXPORT void PrintTo(const BlobDataItem& x, ::std::ostream* os); | 72 friend STORAGE_EXPORT void PrintTo(const BlobDataItem& x, ::std::ostream* os); |
71 | 73 |
72 explicit BlobDataItem(std::unique_ptr<DataElement> item); | 74 explicit BlobDataItem(std::unique_ptr<DataElement> item); |
73 BlobDataItem(std::unique_ptr<DataElement> item, | 75 BlobDataItem(std::unique_ptr<DataElement> item, |
74 const scoped_refptr<DataHandle>& data_handle); | 76 const scoped_refptr<DataHandle>& data_handle); |
75 BlobDataItem(std::unique_ptr<DataElement> item, | 77 BlobDataItem(std::unique_ptr<DataElement> item, |
76 const scoped_refptr<DataHandle>& data_handle, | 78 const scoped_refptr<DataHandle>& data_handle, |
77 disk_cache::Entry* entry, | 79 disk_cache::Entry* entry, |
78 int disk_cache_stream_index, | 80 int disk_cache_stream_index, |
79 int disk_cache_side_stream_index); | 81 int disk_cache_side_stream_index); |
| 82 |
80 virtual ~BlobDataItem(); | 83 virtual ~BlobDataItem(); |
81 | 84 |
82 std::unique_ptr<DataElement> item_; | 85 std::unique_ptr<DataElement> item_; |
83 scoped_refptr<DataHandle> data_handle_; | 86 scoped_refptr<DataHandle> data_handle_; |
84 | 87 |
85 // This naked pointer is safe because the scope is protected by the DataHandle | 88 // This naked pointer is safe because the scope is protected by the DataHandle |
86 // instance for disk cache entries during the lifetime of this BlobDataItem. | 89 // instance for disk cache entries during the lifetime of this BlobDataItem. |
87 disk_cache::Entry* disk_cache_entry_; | 90 disk_cache::Entry* disk_cache_entry_; |
88 int disk_cache_stream_index_; // For TYPE_DISK_CACHE_ENTRY. | 91 int disk_cache_stream_index_; // For TYPE_DISK_CACHE_ENTRY. |
89 int disk_cache_side_stream_index_; // For TYPE_DISK_CACHE_ENTRY. | 92 int disk_cache_side_stream_index_; // For TYPE_DISK_CACHE_ENTRY. |
90 }; | 93 }; |
91 | 94 |
92 STORAGE_EXPORT bool operator==(const BlobDataItem& a, const BlobDataItem& b); | 95 STORAGE_EXPORT bool operator==(const BlobDataItem& a, const BlobDataItem& b); |
93 STORAGE_EXPORT bool operator!=(const BlobDataItem& a, const BlobDataItem& b); | 96 STORAGE_EXPORT bool operator!=(const BlobDataItem& a, const BlobDataItem& b); |
94 | 97 |
95 } // namespace storage | 98 } // namespace storage |
96 | 99 |
97 #endif // STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ | 100 #endif // STORAGE_BROWSER_BLOB_BLOB_DATA_ITEM_H_ |
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