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Side by Side Diff: net/disk_cache/blockfile/mapped_file.h

Issue 266243004: Clang format slam. Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 7 months ago
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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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23 // time). 23 // time).
24 class NET_EXPORT_PRIVATE MappedFile : public File { 24 class NET_EXPORT_PRIVATE MappedFile : public File {
25 public: 25 public:
26 MappedFile() : File(true), init_(false) {} 26 MappedFile() : File(true), init_(false) {}
27 27
28 // Performs object initialization. name is the file to use, and size is the 28 // Performs object initialization. name is the file to use, and size is the
29 // amount of data to memory map from the file. If size is 0, the whole file 29 // amount of data to memory map from the file. If size is 0, the whole file
30 // will be mapped in memory. 30 // will be mapped in memory.
31 void* Init(const base::FilePath& name, size_t size); 31 void* Init(const base::FilePath& name, size_t size);
32 32
33 void* buffer() const { 33 void* buffer() const { return buffer_; }
34 return buffer_;
35 }
36 34
37 // Loads or stores a given block from the backing file (synchronously). 35 // Loads or stores a given block from the backing file (synchronously).
38 bool Load(const FileBlock* block); 36 bool Load(const FileBlock* block);
39 bool Store(const FileBlock* block); 37 bool Store(const FileBlock* block);
40 38
41 // Asynchronous versions of Load/Store, following the semantics of File::Read 39 // Asynchronous versions of Load/Store, following the semantics of File::Read
42 // and File::Write. 40 // and File::Write.
43 bool Load(const FileBlock* block, FileIOCallback* callback, bool* completed); 41 bool Load(const FileBlock* block, FileIOCallback* callback, bool* completed);
44 bool Store(const FileBlock* block, FileIOCallback* callback, bool* completed); 42 bool Store(const FileBlock* block, FileIOCallback* callback, bool* completed);
45 43
46 // Flush the memory-mapped section to disk (synchronously). 44 // Flush the memory-mapped section to disk (synchronously).
47 void Flush(); 45 void Flush();
48 46
49 // Heats up the file system cache and make sure the file is fully 47 // Heats up the file system cache and make sure the file is fully
50 // readable (synchronously). 48 // readable (synchronously).
51 bool Preload(); 49 bool Preload();
52 50
53 private: 51 private:
54 virtual ~MappedFile(); 52 virtual ~MappedFile();
55 53
56 bool init_; 54 bool init_;
57 #if defined(OS_WIN) 55 #if defined(OS_WIN)
58 HANDLE section_; 56 HANDLE section_;
59 #endif 57 #endif
60 void* buffer_; // Address of the memory mapped buffer. 58 void* buffer_; // Address of the memory mapped buffer.
61 size_t view_size_; // Size of the memory pointed by buffer_. 59 size_t view_size_; // Size of the memory pointed by buffer_.
62 #if defined(POSIX_AVOID_MMAP) 60 #if defined(POSIX_AVOID_MMAP)
63 void* snapshot_; // Copy of the buffer taken when it was last flushed. 61 void* snapshot_; // Copy of the buffer taken when it was last flushed.
64 #endif 62 #endif
65 63
66 DISALLOW_COPY_AND_ASSIGN(MappedFile); 64 DISALLOW_COPY_AND_ASSIGN(MappedFile);
67 }; 65 };
68 66
69 // Helper class for calling Flush() on exit from the current scope. 67 // Helper class for calling Flush() on exit from the current scope.
70 class ScopedFlush { 68 class ScopedFlush {
71 public: 69 public:
72 explicit ScopedFlush(MappedFile* file) : file_(file) {} 70 explicit ScopedFlush(MappedFile* file) : file_(file) {}
73 ~ScopedFlush() { 71 ~ScopedFlush() { file_->Flush(); }
74 file_->Flush(); 72
75 }
76 private: 73 private:
77 MappedFile* file_; 74 MappedFile* file_;
78 }; 75 };
79 76
80 } // namespace disk_cache 77 } // namespace disk_cache
81 78
82 #endif // NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_ 79 #endif // NET_DISK_CACHE_BLOCKFILE_MAPPED_FILE_H_
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