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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 NET_BASE_DIRECTORY_LISTER_H_ | 5 #ifndef NET_BASE_DIRECTORY_LISTER_H_ |
| 6 #define NET_BASE_DIRECTORY_LISTER_H_ | 6 #define NET_BASE_DIRECTORY_LISTER_H_ |
| 7 | 7 |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/atomicops.h" | 10 #include "base/atomicops.h" |
| 11 #include "base/files/file_enumerator.h" | 11 #include "base/files/file_enumerator.h" |
| 12 #include "base/files/file_path.h" | 12 #include "base/files/file_path.h" |
| 13 #include "base/macros.h" | 13 #include "base/macros.h" |
| 14 #include "base/memory/ref_counted.h" | 14 #include "base/memory/ref_counted.h" |
| 15 #include "base/memory/scoped_ptr.h" | 15 #include "base/memory/scoped_ptr.h" |
| 16 #include "net/base/net_export.h" | 16 #include "net/base/net_export.h" |
| 17 | 17 |
| 18 namespace base { | 18 namespace base { |
| 19 class MessageLoopProxy; | 19 class SingleThreadTaskRunner; |
| 20 } | 20 } |
| 21 | 21 |
| 22 namespace net { | 22 namespace net { |
| 23 | 23 |
| 24 // This class provides an API for asynchronously listing the contents of a | 24 // This class provides an API for asynchronously listing the contents of a |
| 25 // directory on the filesystem. It runs a task on a background thread, and | 25 // directory on the filesystem. It runs a task on a background thread, and |
| 26 // enumerates all files in the specified directory on that thread. Destroying | 26 // enumerates all files in the specified directory on that thread. Destroying |
| 27 // the lister cancels the list operation. The DirectoryLister must only be | 27 // the lister cancels the list operation. The DirectoryLister must only be |
| 28 // used on a thread with a MessageLoop. | 28 // used on a thread with a MessageLoop. |
| 29 class NET_EXPORT DirectoryLister { | 29 class NET_EXPORT DirectoryLister { |
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| 103 | 103 |
| 104 // Called on both threads. | 104 // Called on both threads. |
| 105 bool IsCancelled() const; | 105 bool IsCancelled() const; |
| 106 | 106 |
| 107 // Called on origin thread. | 107 // Called on origin thread. |
| 108 void DoneOnOriginThread(scoped_ptr<DirectoryList> directory_list, | 108 void DoneOnOriginThread(scoped_ptr<DirectoryList> directory_list, |
| 109 int error) const; | 109 int error) const; |
| 110 | 110 |
| 111 const base::FilePath dir_; | 111 const base::FilePath dir_; |
| 112 const ListingType type_; | 112 const ListingType type_; |
| 113 const scoped_refptr<base::MessageLoopProxy> origin_loop_; | 113 const scoped_refptr<base::SingleThreadTaskRunner> origin_loop_; |
| 114 | 114 |
| 115 // Only used on the origin thread. | 115 // Only used on the origin thread. |
| 116 DirectoryLister* lister_; | 116 DirectoryLister* lister_; |
| 117 | 117 |
| 118 // Set to 1 on cancellation. Used both to abort listing files early on the | 118 // Set to 1 on cancellation. Used both to abort listing files early on the |
| 119 // worker pool thread for performance reasons and to ensure |lister_| isn't | 119 // worker pool thread for performance reasons and to ensure |lister_| isn't |
| 120 // called after cancellation on the origin thread. | 120 // called after cancellation on the origin thread. |
| 121 base::subtle::Atomic32 cancelled_; | 121 base::subtle::Atomic32 cancelled_; |
| 122 | 122 |
| 123 DISALLOW_COPY_AND_ASSIGN(Core); | 123 DISALLOW_COPY_AND_ASSIGN(Core); |
| 124 }; | 124 }; |
| 125 | 125 |
| 126 // Call into the corresponding DirectoryListerDelegate. Must not be called | 126 // Call into the corresponding DirectoryListerDelegate. Must not be called |
| 127 // after cancellation. | 127 // after cancellation. |
| 128 void OnListFile(const DirectoryListerData& data); | 128 void OnListFile(const DirectoryListerData& data); |
| 129 void OnListDone(int error); | 129 void OnListDone(int error); |
| 130 | 130 |
| 131 scoped_refptr<Core> core_; | 131 scoped_refptr<Core> core_; |
| 132 DirectoryListerDelegate* const delegate_; | 132 DirectoryListerDelegate* const delegate_; |
| 133 | 133 |
| 134 DISALLOW_COPY_AND_ASSIGN(DirectoryLister); | 134 DISALLOW_COPY_AND_ASSIGN(DirectoryLister); |
| 135 }; | 135 }; |
| 136 | 136 |
| 137 } // namespace net | 137 } // namespace net |
| 138 | 138 |
| 139 #endif // NET_BASE_DIRECTORY_LISTER_H_ | 139 #endif // NET_BASE_DIRECTORY_LISTER_H_ |
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