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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_H_ | 5 #include "storage/browser/fileapi/quota/open_file_handle_context.h" |
6 #define WEBKIT_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_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 "url/gurl.h" | |
15 #include "webkit/browser/storage_browser_export.h" | |
16 #include "webkit/common/fileapi/file_system_types.h" | |
17 | |
18 namespace storage { | |
19 | |
20 class QuotaReservationBuffer; | |
21 | |
22 // This class represents a underlying file of a managed FileSystem file. | |
23 // The instance keeps alive while at least one consumer keeps an open file | |
24 // handle. | |
25 // This class is usually manipulated only via OpenFileHandle. | |
26 class OpenFileHandleContext : public base::RefCounted<OpenFileHandleContext> { | |
27 public: | |
28 OpenFileHandleContext(const base::FilePath& platform_path, | |
29 QuotaReservationBuffer* reservation_buffer); | |
30 | |
31 // Updates the max written offset and returns the amount of growth. | |
32 int64 UpdateMaxWrittenOffset(int64 offset); | |
33 | |
34 void AddAppendModeWriteAmount(int64 amount); | |
35 | |
36 const base::FilePath& platform_path() const { | |
37 return platform_path_; | |
38 } | |
39 | |
40 int64 GetEstimatedFileSize() const; | |
41 int64 GetMaxWrittenOffset() const; | |
42 | |
43 private: | |
44 friend class base::RefCounted<OpenFileHandleContext>; | |
45 virtual ~OpenFileHandleContext(); | |
46 | |
47 int64 initial_file_size_; | |
48 int64 maximum_written_offset_; | |
49 int64 append_mode_write_amount_; | |
50 base::FilePath platform_path_; | |
51 | |
52 scoped_refptr<QuotaReservationBuffer> reservation_buffer_; | |
53 | |
54 base::SequenceChecker sequence_checker_; | |
55 | |
56 DISALLOW_COPY_AND_ASSIGN(OpenFileHandleContext); | |
57 }; | |
58 | |
59 } // namespace storage | |
60 | |
61 #endif // WEBKIT_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_H_ | |
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