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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 // See net/disk_cache/disk_cache.h for the public interface of the cache. | 5 // See net/disk_cache/disk_cache.h for the public interface of the cache. |
6 | 6 |
7 #ifndef NET_DISK_CACHE_MAPPED_FILE_H_ | 7 #ifndef NET_DISK_CACHE_MAPPED_FILE_H_ |
8 #define NET_DISK_CACHE_MAPPED_FILE_H_ | 8 #define NET_DISK_CACHE_MAPPED_FILE_H_ |
9 | 9 |
10 #include "net/base/net_export.h" | 10 #include "net/base/net_export.h" |
11 #include "net/disk_cache/disk_format.h" | 11 #include "net/disk_cache/disk_format.h" |
12 #include "net/disk_cache/file.h" | 12 #include "net/disk_cache/file.h" |
13 #include "net/disk_cache/file_block.h" | 13 #include "net/disk_cache/file_block.h" |
14 | 14 |
| 15 namespace base { |
15 class FilePath; | 16 class FilePath; |
| 17 } |
16 | 18 |
17 namespace disk_cache { | 19 namespace disk_cache { |
18 | 20 |
19 // This class implements a memory mapped file used to access block-files. The | 21 // This class implements a memory mapped file used to access block-files. The |
20 // idea is that the header and bitmap will be memory mapped all the time, and | 22 // idea is that the header and bitmap will be memory mapped all the time, and |
21 // the actual data for the blocks will be access asynchronously (most of the | 23 // the actual data for the blocks will be access asynchronously (most of the |
22 // time). | 24 // time). |
23 class NET_EXPORT_PRIVATE MappedFile : public File { | 25 class NET_EXPORT_PRIVATE MappedFile : public File { |
24 public: | 26 public: |
25 MappedFile() : File(true), init_(false) {} | 27 MappedFile() : File(true), init_(false) {} |
26 | 28 |
27 // Performs object initialization. name is the file to use, and size is the | 29 // Performs object initialization. name is the file to use, and size is the |
28 // amount of data to memory map from the file. If size is 0, the whole file | 30 // amount of data to memory map from the file. If size is 0, the whole file |
29 // will be mapped in memory. | 31 // will be mapped in memory. |
30 void* Init(const FilePath& name, size_t size); | 32 void* Init(const base::FilePath& name, size_t size); |
31 | 33 |
32 void* buffer() const { | 34 void* buffer() const { |
33 return buffer_; | 35 return buffer_; |
34 } | 36 } |
35 | 37 |
36 // Loads or stores a given block from the backing file (synchronously). | 38 // Loads or stores a given block from the backing file (synchronously). |
37 bool Load(const FileBlock* block); | 39 bool Load(const FileBlock* block); |
38 bool Store(const FileBlock* block); | 40 bool Store(const FileBlock* block); |
39 | 41 |
40 // Flush the memory-mapped section to disk (synchronously). | 42 // Flush the memory-mapped section to disk (synchronously). |
(...skipping 22 matching lines...) Expand all Loading... |
63 ~ScopedFlush() { | 65 ~ScopedFlush() { |
64 file_->Flush(); | 66 file_->Flush(); |
65 } | 67 } |
66 private: | 68 private: |
67 MappedFile* file_; | 69 MappedFile* file_; |
68 }; | 70 }; |
69 | 71 |
70 } // namespace disk_cache | 72 } // namespace disk_cache |
71 | 73 |
72 #endif // NET_DISK_CACHE_MAPPED_FILE_H_ | 74 #endif // NET_DISK_CACHE_MAPPED_FILE_H_ |
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