1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_BUFFER_H_ 6 #define WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_BUFFER_H_ 7 8 #include <map> 9 10 #include "base/basictypes.h" 11 #include "base/files/file_path.h" 12 #include "base/memory/ref_counted.h" 13 #include "base/memory/weak_ptr.h" 14 #include "base/platform_file.h" 15 #include "url/gurl.h" 16 #include "webkit/browser/webkit_storage_browser_export.h" 17 #include "webkit/common/fileapi/file_system_types.h" 18 19 namespace fileapi { 20 21 class QuotaReservation; 22 class OpenFileHandle; 23 class OpenFileHandleContext; 24 class QuotaReservationManager; 25 26 // QuotaReservationBuffer manages QuotaReservation instances. All consumed 27 // quota and leaked quota by associated QuotaReservation will be staged in 28 // QuotaReservationBuffer, and will be committed on a modified file is closed. 29 // The instance keeps alive while any associated QuotaReservation or 30 // OpenFileHandle alive. 31 // This class is usually manipulated only via OpenFileHandle and 32 // QuotaReservation. 33 class QuotaReservationBuffer : public base::RefCounted<QuotaReservationBuffer> { 34 public: 35 QuotaReservationBuffer( 36 base::WeakPtr<QuotaReservationManager> reservation_manager, 37 const GURL& origin, 38 FileSystemType type); 39 40 scoped_refptr<QuotaReservation> CreateReservation(); 41 scoped_ptr<OpenFileHandle> GetOpenFileHandle( 42 QuotaReservation* reservation, 43 const base::FilePath& platform_path); 44 void CommitFileGrowth(int64 quota_consumption, int64 usage_delta); 45 void DetachOpenFileHandleContext(OpenFileHandleContext* context); 46 void PutReservationToBuffer(int64 size); 47 reservation_manager()48 QuotaReservationManager* reservation_manager() { 49 return reservation_manager_.get(); 50 } 51 origin()52 const GURL& origin() const { return origin_; } type()53 FileSystemType type() const { return type_; } 54 55 private: 56 friend class base::RefCounted<QuotaReservationBuffer>; 57 virtual ~QuotaReservationBuffer(); 58 59 static bool DecrementDirtyCount( 60 base::WeakPtr<QuotaReservationManager> reservation_manager, 61 const GURL& origin, 62 FileSystemType type, 63 base::PlatformFileError error); 64 65 typedef std::map<base::FilePath, OpenFileHandleContext*> 66 OpenFileHandleContextByPath; 67 68 // Not owned. The destructor of OpenFileHandler should erase itself from 69 // |open_files_|. 70 OpenFileHandleContextByPath open_files_; 71 72 base::WeakPtr<QuotaReservationManager> reservation_manager_; 73 74 GURL origin_; 75 fileapi::FileSystemType type_; 76 77 int64 reserved_quota_; 78 79 base::SequenceChecker sequence_checker_; 80 81 DISALLOW_COPY_AND_ASSIGN(QuotaReservationBuffer); 82 }; 83 84 } // namespace fileapi 85 86 #endif // WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_BUFFER_H_ 87