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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_BLOB_SHAREABLE_FILE_REFERENCE_H_ | 5 #ifndef WEBKIT_BLOB_SHAREABLE_FILE_REFERENCE_H_ |
6 #define WEBKIT_BLOB_SHAREABLE_FILE_REFERENCE_H_ | 6 #define WEBKIT_BLOB_SHAREABLE_FILE_REFERENCE_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/callback.h" | 10 #include "base/callback.h" |
11 #include "base/file_path.h" | 11 #include "base/file_path.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "webkit/storage/webkit_storage_export.h" | 13 #include "webkit/storage/webkit_storage_export.h" |
14 | 14 |
15 namespace base { | 15 namespace base { |
16 class TaskRunner; | 16 class TaskRunner; |
17 } | 17 } |
18 | 18 |
19 namespace webkit_blob { | 19 namespace webkit_blob { |
20 | 20 |
21 // A refcounted wrapper around a FilePath that can optionally schedule | 21 // A refcounted wrapper around a FilePath that can optionally schedule |
22 // the file to be deleted upon final release and/or to notify a consumer | 22 // the file to be deleted upon final release and/or to notify a consumer |
23 // when final release occurs. This class is single-threaded and should | 23 // when final release occurs. This class is single-threaded and should |
24 // only be invoked on the IO thread in chrome. | 24 // only be invoked on the IO thread in chrome. |
25 class WEBKIT_STORAGE_EXPORT ShareableFileReference | 25 class WEBKIT_STORAGE_EXPORT ShareableFileReference |
26 : public base::RefCounted<ShareableFileReference> { | 26 : public base::RefCounted<ShareableFileReference> { |
27 public: | 27 public: |
28 typedef base::Callback<void(const FilePath&)> FinalReleaseCallback; | 28 typedef base::Callback<void(const base::FilePath&)> FinalReleaseCallback; |
29 | 29 |
30 enum FinalReleasePolicy { | 30 enum FinalReleasePolicy { |
31 DELETE_ON_FINAL_RELEASE, | 31 DELETE_ON_FINAL_RELEASE, |
32 DONT_DELETE_ON_FINAL_RELEASE, | 32 DONT_DELETE_ON_FINAL_RELEASE, |
33 }; | 33 }; |
34 | 34 |
35 // Returns a ShareableFileReference for the given path, if no reference | 35 // Returns a ShareableFileReference for the given path, if no reference |
36 // for this path exists returns NULL. | 36 // for this path exists returns NULL. |
37 static scoped_refptr<ShareableFileReference> Get(const FilePath& path); | 37 static scoped_refptr<ShareableFileReference> Get(const base::FilePath& path); |
38 | 38 |
39 // Returns a ShareableFileReference for the given path, creating a new | 39 // Returns a ShareableFileReference for the given path, creating a new |
40 // reference if none yet exists. If there's a pre-existing reference for | 40 // reference if none yet exists. If there's a pre-existing reference for |
41 // the path, the deletable parameter of this method is ignored. | 41 // the path, the deletable parameter of this method is ignored. |
42 static scoped_refptr<ShareableFileReference> GetOrCreate( | 42 static scoped_refptr<ShareableFileReference> GetOrCreate( |
43 const FilePath& path, | 43 const base::FilePath& path, |
44 FinalReleasePolicy policy, | 44 FinalReleasePolicy policy, |
45 base::TaskRunner* file_task_runner); | 45 base::TaskRunner* file_task_runner); |
46 | 46 |
47 // The full file path. | 47 // The full file path. |
48 const FilePath& path() const { return path_; } | 48 const base::FilePath& path() const { return path_; } |
49 | 49 |
50 // Whether it's to be deleted on final release. | 50 // Whether it's to be deleted on final release. |
51 FinalReleasePolicy final_release_policy() const { | 51 FinalReleasePolicy final_release_policy() const { |
52 return final_release_policy_; | 52 return final_release_policy_; |
53 } | 53 } |
54 | 54 |
55 void AddFinalReleaseCallback(const FinalReleaseCallback& callback); | 55 void AddFinalReleaseCallback(const FinalReleaseCallback& callback); |
56 | 56 |
57 private: | 57 private: |
58 friend class base::RefCounted<ShareableFileReference>; | 58 friend class base::RefCounted<ShareableFileReference>; |
59 | 59 |
60 ShareableFileReference( | 60 ShareableFileReference( |
61 const FilePath& path, | 61 const base::FilePath& path, |
62 FinalReleasePolicy policy, | 62 FinalReleasePolicy policy, |
63 base::TaskRunner* file_task_runner); | 63 base::TaskRunner* file_task_runner); |
64 ~ShareableFileReference(); | 64 ~ShareableFileReference(); |
65 | 65 |
66 const FilePath path_; | 66 const base::FilePath path_; |
67 const FinalReleasePolicy final_release_policy_; | 67 const FinalReleasePolicy final_release_policy_; |
68 const scoped_refptr<base::TaskRunner> file_task_runner_; | 68 const scoped_refptr<base::TaskRunner> file_task_runner_; |
69 std::vector<FinalReleaseCallback> final_release_callbacks_; | 69 std::vector<FinalReleaseCallback> final_release_callbacks_; |
70 | 70 |
71 DISALLOW_COPY_AND_ASSIGN(ShareableFileReference); | 71 DISALLOW_COPY_AND_ASSIGN(ShareableFileReference); |
72 }; | 72 }; |
73 | 73 |
74 } // namespace webkit_blob | 74 } // namespace webkit_blob |
75 | 75 |
76 #endif // WEBKIT_BLOB_SHAREABLE_FILE_REFERENCE_H_ | 76 #endif // WEBKIT_BLOB_SHAREABLE_FILE_REFERENCE_H_ |
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