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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_BLOCKFILE_MAPPED_FILE_H_ | 7 #ifndef NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ |
8 #define NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ | 8 #define NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ |
9 | 9 |
10 #include "net/base/net_export.h" | 10 #include "net/base/net_export.h" |
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39 bool Store(const FileBlock* block); | 39 bool Store(const FileBlock* block); |
40 | 40 |
41 // Asynchronous versions of Load/Store, following the semantics of File::Read | 41 // Asynchronous versions of Load/Store, following the semantics of File::Read |
42 // and File::Write. | 42 // and File::Write. |
43 bool Load(const FileBlock* block, FileIOCallback* callback, bool* completed); | 43 bool Load(const FileBlock* block, FileIOCallback* callback, bool* completed); |
44 bool Store(const FileBlock* block, FileIOCallback* callback, bool* completed); | 44 bool Store(const FileBlock* block, FileIOCallback* callback, bool* completed); |
45 | 45 |
46 // Flush the memory-mapped section to disk (synchronously). | 46 // Flush the memory-mapped section to disk (synchronously). |
47 void Flush(); | 47 void Flush(); |
48 | 48 |
| 49 // Heats up the file system cache and make sure the file is fully |
| 50 // readable (synchronously). |
| 51 bool Preload(); |
| 52 |
49 private: | 53 private: |
50 virtual ~MappedFile(); | 54 virtual ~MappedFile(); |
51 | 55 |
52 bool init_; | 56 bool init_; |
53 #if defined(OS_WIN) | 57 #if defined(OS_WIN) |
54 HANDLE section_; | 58 HANDLE section_; |
55 #endif | 59 #endif |
56 void* buffer_; // Address of the memory mapped buffer. | 60 void* buffer_; // Address of the memory mapped buffer. |
57 size_t view_size_; // Size of the memory pointed by buffer_. | 61 size_t view_size_; // Size of the memory pointed by buffer_. |
58 #if defined(POSIX_AVOID_MMAP) | 62 #if defined(POSIX_AVOID_MMAP) |
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69 ~ScopedFlush() { | 73 ~ScopedFlush() { |
70 file_->Flush(); | 74 file_->Flush(); |
71 } | 75 } |
72 private: | 76 private: |
73 MappedFile* file_; | 77 MappedFile* file_; |
74 }; | 78 }; |
75 | 79 |
76 } // namespace disk_cache | 80 } // namespace disk_cache |
77 | 81 |
78 #endif // NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ | 82 #endif // NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ |
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