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Side by Side Diff: content/browser/fileapi/blob_storage_host.h

Issue 810403004: [Storage] Blob Storage Refactoring pt 1 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Snapshots now created by the Handle, one more rename Created 5 years, 11 months ago
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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_FILEAPI_STORAGE_HOST_H_ 5 #ifndef CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
6 #define CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_ 6 #define CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
7 7
8 #include <map> 8 #include <map>
9 #include <set> 9 #include <set>
10 #include <string> 10 #include <string>
11 11
12 #include "base/compiler_specific.h" 12 #include "base/compiler_specific.h"
13 #include "base/memory/weak_ptr.h" 13 #include "base/memory/weak_ptr.h"
14 #include "content/common/content_export.h" 14 #include "content/common/content_export.h"
15 #include "storage/common/blob/blob_data.h" 15 #include "storage/common/data_element.h"
16 16
17 class GURL; 17 class GURL;
18 18
19 namespace storage { 19 namespace storage {
20 class BlobDataHandle; 20 class BlobDataHandle;
21 class BlobStorageHost; 21 class BlobStorageHost;
22 class BlobStorageContext; 22 class BlobStorageContext;
23 } 23 }
24 24
25 using storage::BlobStorageContext;
26 using storage::BlobData;
27
28 namespace content { 25 namespace content {
29 26
30 // This class handles the logistics of blob storage for a single child process. 27 // This class handles the logistics of blob storage for a single child process.
31 // There is one instance per child process. When the child process 28 // There is one instance per child process. When the child process
32 // terminates all blob references attibutable to that process go away upon 29 // terminates all blob references attibutable to that process go away upon
33 // destruction of the instance. The class is single threaded and should 30 // destruction of the instance. The class is single threaded and should
34 // only be used on the IO thread. 31 // only be used on the IO thread.
35 class CONTENT_EXPORT BlobStorageHost { 32 class CONTENT_EXPORT BlobStorageHost {
michaeln 2015/01/21 01:46:41 not for this cl, but this file should probably in
dmurph 2015/01/21 22:40:11 Acknowledged.
36 public: 33 public:
37 explicit BlobStorageHost(BlobStorageContext* context); 34 explicit BlobStorageHost(storage::BlobStorageContext* context);
38 ~BlobStorageHost(); 35 ~BlobStorageHost();
39 36
40 // Methods to support the IPC message protocol. 37 // Methods to support the IPC message protocol.
41 // A false return indicates a problem with the inputs 38 // A false return indicates a problem with the inputs
42 // like a non-existent or pre-existent uuid or url. 39 // like a non-existent or pre-existent uuid or url.
43 bool StartBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT; 40 bool StartBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT;
44 bool AppendBlobDataItem(const std::string& uuid, 41 bool AppendBlobDataItem(const std::string& uuid,
45 const BlobData::Item& data_item) WARN_UNUSED_RESULT; 42 const storage::DataElement& data_item)
43 WARN_UNUSED_RESULT;
46 bool CancelBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT; 44 bool CancelBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT;
47 bool FinishBuildingBlob(const std::string& uuid, 45 bool FinishBuildingBlob(const std::string& uuid,
48 const std::string& type) WARN_UNUSED_RESULT; 46 const std::string& type) WARN_UNUSED_RESULT;
49 bool IncrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT; 47 bool IncrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT;
50 bool DecrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT; 48 bool DecrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT;
51 bool RegisterPublicBlobURL(const GURL& blob_url, 49 bool RegisterPublicBlobURL(const GURL& blob_url,
52 const std::string& uuid) WARN_UNUSED_RESULT; 50 const std::string& uuid) WARN_UNUSED_RESULT;
53 bool RevokePublicBlobURL(const GURL& blob_url) WARN_UNUSED_RESULT; 51 bool RevokePublicBlobURL(const GURL& blob_url) WARN_UNUSED_RESULT;
54 52
55 private: 53 private:
56 typedef std::map<std::string, int> BlobReferenceMap; 54 typedef std::map<std::string, int> BlobReferenceMap;
57 55
58 bool IsInUseInHost(const std::string& uuid); 56 bool IsInUseInHost(const std::string& uuid);
59 bool IsBeingBuiltInHost(const std::string& uuid); 57 bool IsBeingBuiltInHost(const std::string& uuid);
60 bool IsUrlRegisteredInHost(const GURL& blob_url); 58 bool IsUrlRegisteredInHost(const GURL& blob_url);
61 59
62 // Collection of blob ids and a count of how many usages 60 // Collection of blob ids and a count of how many usages
63 // of that id are attributable to this consumer. 61 // of that id are attributable to this consumer.
64 BlobReferenceMap blobs_inuse_map_; 62 BlobReferenceMap blobs_inuse_map_;
65 63
66 // The set of public blob urls coined by this consumer. 64 // The set of public blob urls coined by this consumer.
67 std::set<GURL> public_blob_urls_; 65 std::set<GURL> public_blob_urls_;
68 66
69 base::WeakPtr<BlobStorageContext> context_; 67 base::WeakPtr<storage::BlobStorageContext> context_;
70 68
71 DISALLOW_COPY_AND_ASSIGN(BlobStorageHost); 69 DISALLOW_COPY_AND_ASSIGN(BlobStorageHost);
72 }; 70 };
73 71
74 } // namespace content 72 } // namespace content
75 73
76 #endif // CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_ 74 #endif // CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
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