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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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