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Side by Side Diff: base/files/memory_mapped_file.h

Issue 1446363003: Deleted OS_WIN and all Windows specific files from base. (Closed) Base URL: https://github.com/domokit/mojo.git@base_tests
Patch Set: Created 5 years, 1 month ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 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 BASE_FILES_MEMORY_MAPPED_FILE_H_ 5 #ifndef BASE_FILES_MEMORY_MAPPED_FILE_H_
6 #define BASE_FILES_MEMORY_MAPPED_FILE_H_ 6 #define BASE_FILES_MEMORY_MAPPED_FILE_H_
7 7
8 #include "base/base_export.h" 8 #include "base/base_export.h"
9 #include "base/basictypes.h" 9 #include "base/basictypes.h"
10 #include "base/files/file.h" 10 #include "base/files/file.h"
11 #include "build/build_config.h" 11 #include "build/build_config.h"
12 12
13 #if defined(OS_WIN)
14 #include <windows.h>
15 #endif
16
17 namespace base { 13 namespace base {
18 14
19 class FilePath; 15 class FilePath;
20 16
21 class BASE_EXPORT MemoryMappedFile { 17 class BASE_EXPORT MemoryMappedFile {
22 public: 18 public:
23 // The default constructor sets all members to invalid/null values. 19 // The default constructor sets all members to invalid/null values.
24 MemoryMappedFile(); 20 MemoryMappedFile();
25 ~MemoryMappedFile(); 21 ~MemoryMappedFile();
26 22
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52 // Later we may want to allow the user to specify access. 48 // Later we may want to allow the user to specify access.
53 bool Initialize(const FilePath& file_name); 49 bool Initialize(const FilePath& file_name);
54 50
55 // As above, but works with an already-opened file. MemoryMappedFile takes 51 // As above, but works with an already-opened file. MemoryMappedFile takes
56 // ownership of |file| and closes it when done. 52 // ownership of |file| and closes it when done.
57 bool Initialize(File file); 53 bool Initialize(File file);
58 54
59 // As above, but works with a region of an already-opened file. 55 // As above, but works with a region of an already-opened file.
60 bool Initialize(File file, const Region& region); 56 bool Initialize(File file, const Region& region);
61 57
62 #if defined(OS_WIN)
63 // Opens an existing file and maps it as an image section. Please refer to
64 // the Initialize function above for additional information.
65 bool InitializeAsImageSection(const FilePath& file_name);
66 #endif // OS_WIN
67
68 const uint8* data() const { return data_; } 58 const uint8* data() const { return data_; }
69 size_t length() const { return length_; } 59 size_t length() const { return length_; }
70 60
71 // Is file_ a valid file handle that points to an open, memory mapped file? 61 // Is file_ a valid file handle that points to an open, memory mapped file?
72 bool IsValid() const; 62 bool IsValid() const;
73 63
74 private: 64 private:
75 // Given the arbitrarily aligned memory region [start, size], returns the 65 // Given the arbitrarily aligned memory region [start, size], returns the
76 // boundaries of the region aligned to the granularity specified by the OS, 66 // boundaries of the region aligned to the granularity specified by the OS,
77 // (a page on Linux, ~32k on Windows) as follows: 67 // (a page on Linux, ~32k on Windows) as follows:
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88 // success, false on any kind of failure. This is a helper for Initialize(). 78 // success, false on any kind of failure. This is a helper for Initialize().
89 bool MapFileRegionToMemory(const Region& region); 79 bool MapFileRegionToMemory(const Region& region);
90 80
91 // Closes all open handles. 81 // Closes all open handles.
92 void CloseHandles(); 82 void CloseHandles();
93 83
94 File file_; 84 File file_;
95 uint8* data_; 85 uint8* data_;
96 size_t length_; 86 size_t length_;
97 87
98 #if defined(OS_WIN)
99 win::ScopedHandle file_mapping_;
100 bool image_; // Map as an image.
101 #endif
102
103 DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile); 88 DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile);
104 }; 89 };
105 90
106 } // namespace base 91 } // namespace base
107 92
108 #endif // BASE_FILES_MEMORY_MAPPED_FILE_H_ 93 #endif // BASE_FILES_MEMORY_MAPPED_FILE_H_
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