Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_ |
| 6 | #define WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_ |
| 7 | |
| 8 | #include "base/files/file_path.h" |
| 9 | #include "base/supports_user_data.h" |
| 10 | #include "base/threading/thread_checker.h" |
| 11 | #include "webkit/browser/fileapi/task_runner_bound_observer_list.h" |
Torne (Richard Coles) | 7d4cd47 | 2013-06-19 11:58:07 +0100 | [diff] [blame] | 12 | #include "webkit/browser/webkit_storage_browser_export.h" |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 13 | #include "webkit/common/quota/quota_types.h" |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 14 | |
| 15 | namespace base { |
| 16 | class SequencedTaskRunner; |
| 17 | } |
| 18 | |
| 19 | namespace fileapi { |
| 20 | |
| 21 | class FileSystemContext; |
| 22 | |
| 23 | // A context class which is carried around by FileSystemOperation and |
| 24 | // its delegated tasks. It is valid to reuse one context instance across |
| 25 | // multiple operations as far as those operations are supposed to share |
| 26 | // the same context (e.g. use the same task runner, share the quota etc). |
| 27 | // Note that the remaining quota bytes (allowed_bytes_growth) may be |
| 28 | // updated during the execution of write operations. |
Torne (Richard Coles) | 7d4cd47 | 2013-06-19 11:58:07 +0100 | [diff] [blame] | 29 | class WEBKIT_STORAGE_BROWSER_EXPORT_PRIVATE FileSystemOperationContext |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 30 | : public base::SupportsUserData { |
| 31 | public: |
| 32 | explicit FileSystemOperationContext(FileSystemContext* context); |
| 33 | |
| 34 | // Specifies |task_runner| which the operation is performed on. |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 35 | // The backend of |task_runner| must outlive the IO thread. |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 36 | FileSystemOperationContext(FileSystemContext* context, |
| 37 | base::SequencedTaskRunner* task_runner); |
| 38 | |
| 39 | virtual ~FileSystemOperationContext(); |
| 40 | |
| 41 | FileSystemContext* file_system_context() const { |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 42 | return file_system_context_.get(); |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | // Updates the current remaining quota. |
| 46 | // This can be called to update the remaining quota during the operation. |
| 47 | void set_allowed_bytes_growth(const int64& allowed_bytes_growth) { |
| 48 | allowed_bytes_growth_ = allowed_bytes_growth; |
| 49 | } |
| 50 | |
| 51 | // Returns the current remaining quota. |
| 52 | int64 allowed_bytes_growth() const { return allowed_bytes_growth_; } |
| 53 | quota::QuotaLimitType quota_limit_type() const { return quota_limit_type_; } |
| 54 | base::SequencedTaskRunner* task_runner() const { return task_runner_.get(); } |
| 55 | const base::FilePath& root_path() const { return root_path_; } |
| 56 | |
| 57 | ChangeObserverList* change_observers() { return &change_observers_; } |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 58 | UpdateObserverList* update_observers() { return &update_observers_; } |
| 59 | |
| 60 | // Following setters should be called only on the same thread as the |
| 61 | // FileSystemOperationContext is created (i.e. are not supposed be updated |
| 62 | // after the context's passed onto other task runners). |
| 63 | void set_change_observers(const ChangeObserverList& list) { |
| 64 | DCHECK(setter_thread_checker_.CalledOnValidThread()); |
| 65 | change_observers_ = list; |
| 66 | } |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 67 | void set_update_observers(const UpdateObserverList& list) { |
| 68 | DCHECK(setter_thread_checker_.CalledOnValidThread()); |
| 69 | update_observers_ = list; |
| 70 | } |
| 71 | void set_quota_limit_type(quota::QuotaLimitType limit_type) { |
| 72 | DCHECK(setter_thread_checker_.CalledOnValidThread()); |
| 73 | quota_limit_type_ = limit_type; |
| 74 | } |
| 75 | void set_root_path(const base::FilePath& root_path) { |
| 76 | DCHECK(setter_thread_checker_.CalledOnValidThread()); |
| 77 | root_path_ = root_path; |
| 78 | } |
| 79 | |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 80 | private: |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 81 | scoped_refptr<FileSystemContext> file_system_context_; |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 82 | scoped_refptr<base::SequencedTaskRunner> task_runner_; |
| 83 | |
| 84 | // The current remaining quota, used by ObfuscatedFileUtil. |
| 85 | int64 allowed_bytes_growth_; |
| 86 | |
| 87 | // The current quota limit type, used by ObfuscatedFileUtil. |
| 88 | quota::QuotaLimitType quota_limit_type_; |
| 89 | |
| 90 | // Observers attached to this context. |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 91 | ChangeObserverList change_observers_; |
| 92 | UpdateObserverList update_observers_; |
| 93 | |
| 94 | // Root path for the operation, used by LocalFileUtil. |
| 95 | base::FilePath root_path_; |
| 96 | |
| 97 | // Used to check its setters are not called on arbitrary thread. |
| 98 | base::ThreadChecker setter_thread_checker_; |
| 99 | |
| 100 | DISALLOW_COPY_AND_ASSIGN(FileSystemOperationContext); |
| 101 | }; |
| 102 | |
| 103 | } // namespace fileapi |
| 104 | |
| 105 | #endif // WEBKIT_BROWSER_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_ |