Move webkit/fileapi/syncable/* code to webkit/browser/fileapi (final!)

webkit/fileapi/syncable/local_file_sync_status.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_STATUS_H_
-#define WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_STATUS_H_
-
-#include <map>
-#include <set>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
-#include "webkit/browser/fileapi/file_system_url.h"
-
-namespace fileapi {
-class FileSystemURL;
-}
-
-namespace sync_file_system {
-
-// Represents local file sync status.
-// This class is supposed to run only on IO thread.
-//
-// This class manages two important synchronization flags: writing (counter)
-// and syncing (flag).  Writing counter keeps track of which URL is in
-// writing and syncing flag indicates which URL is in syncing.
-//
-// An entry can have multiple writers but sync is exclusive and cannot overwrap
-// with any writes or syncs.
-class WEBKIT_STORAGE_EXPORT LocalFileSyncStatus : public base::NonThreadSafe {
- public:
-  class WEBKIT_STORAGE_EXPORT Observer {
-   public:
-    Observer() {}
-    virtual ~Observer() {}
-    virtual void OnSyncEnabled(const fileapi::FileSystemURL& url) = 0;
-    virtual void OnWriteEnabled(const fileapi::FileSystemURL& url) = 0;
-   private:
-    DISALLOW_COPY_AND_ASSIGN(Observer);
-  };
-
-  LocalFileSyncStatus();
-  ~LocalFileSyncStatus();
-
-  // Increment writing counter for |url|.
-  // This should not be called if the |url| is not writable.
-  void StartWriting(const fileapi::FileSystemURL& url);
-
-  // Decrement writing counter for |url|.
-  void EndWriting(const fileapi::FileSystemURL& url);
-
-  // Start syncing for |url| and disable writing.
-  // This should not be called if |url| is in syncing or in writing.
-  void StartSyncing(const fileapi::FileSystemURL& url);
-
-  // Clears the syncing flag for |url| and enable writing.
-  void EndSyncing(const fileapi::FileSystemURL& url);
-
-  // Returns true if the |url| or its parent or child is in writing.
-  bool IsWriting(const fileapi::FileSystemURL& url) const;
-
-  // Returns true if the |url| is enabled for writing (i.e. not in syncing).
-  bool IsWritable(const fileapi::FileSystemURL& url) const;
-
-  // Returns true if the |url| is enabled for syncing (i.e. neither in
-  // syncing nor writing).
-  bool IsSyncable(const fileapi::FileSystemURL& url) const;
-
-  void AddObserver(Observer* observer);
-  void RemoveObserver(Observer* observer);
-
- private:
-  typedef std::map<fileapi::FileSystemURL,int64,
-                   fileapi::FileSystemURL::Comparator> URLCountMap;
-
-  bool IsChildOrParentWriting(const fileapi::FileSystemURL& url) const;
-  bool IsChildOrParentSyncing(const fileapi::FileSystemURL& url) const;
-
-  // If this count is non-zero positive there're ongoing write operations.
-  URLCountMap writing_;
-
-  // If this flag is set sync process is running on the file.
-  fileapi::FileSystemURLSet syncing_;
-
-  ObserverList<Observer> observer_list_;
-
-  DISALLOW_COPY_AND_ASSIGN(LocalFileSyncStatus);
-};
-
-}  // namespace sync_file_system
-
-#endif  // WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_STATUS_H_