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Unified Diff: base/files/memory_mapped_file.h

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/files/memory_mapped_file.h
diff --git a/base/files/memory_mapped_file.h b/base/files/memory_mapped_file.h
deleted file mode 100644
index 9ff29b9fef11c74df2136de44d81efe0bd6034e9..0000000000000000000000000000000000000000
--- a/base/files/memory_mapped_file.h
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_FILES_MEMORY_MAPPED_FILE_H_
-#define BASE_FILES_MEMORY_MAPPED_FILE_H_
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "base/files/file.h"
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
-namespace base {
-
-class FilePath;
-
-class BASE_EXPORT MemoryMappedFile {
- public:
- // The default constructor sets all members to invalid/null values.
- MemoryMappedFile();
- ~MemoryMappedFile();
-
- // Used to hold information about a region [offset + size] of a file.
- struct BASE_EXPORT Region {
- static const Region kWholeFile;
-
- bool operator==(const Region& other) const;
- bool operator!=(const Region& other) const;
-
- // Start of the region (measured in bytes from the beginning of the file).
- int64 offset;
-
- // Length of the region in bytes.
- int64 size;
- };
-
- // Opens an existing file and maps it into memory. Access is restricted to
- // read only. If this object already points to a valid memory mapped file
- // then this method will fail and return false. If it cannot open the file,
- // the file does not exist, or the memory mapping fails, it will return false.
- // Later we may want to allow the user to specify access.
- bool Initialize(const FilePath& file_name);
-
- // As above, but works with an already-opened file. MemoryMappedFile takes
- // ownership of |file| and closes it when done.
- bool Initialize(File file);
-
- // As above, but works with a region of an already-opened file.
- bool Initialize(File file, const Region& region);
-
-#if defined(OS_WIN)
- // Opens an existing file and maps it as an image section. Please refer to
- // the Initialize function above for additional information.
- bool InitializeAsImageSection(const FilePath& file_name);
-#endif // OS_WIN
-
- const uint8* data() const { return data_; }
- size_t length() const { return length_; }
-
- // Is file_ a valid file handle that points to an open, memory mapped file?
- bool IsValid() const;
-
- private:
- // Given the arbitrarily aligned memory region [start, size], returns the
- // boundaries of the region aligned to the granularity specified by the OS,
- // (a page on Linux, ~32k on Windows) as follows:
- // - |aligned_start| is page aligned and <= |start|.
- // - |aligned_size| is a multiple of the VM granularity and >= |size|.
- // - |offset| is the displacement of |start| w.r.t |aligned_start|.
- static void CalculateVMAlignedBoundaries(int64 start,
- int64 size,
- int64* aligned_start,
- int64* aligned_size,
- int32* offset);
-
- // Map the file to memory, set data_ to that memory address. Return true on
- // success, false on any kind of failure. This is a helper for Initialize().
- bool MapFileRegionToMemory(const Region& region);
-
- // Closes all open handles.
- void CloseHandles();
-
- File file_;
- uint8* data_;
- size_t length_;
-
-#if defined(OS_WIN)
- win::ScopedHandle file_mapping_;
- bool image_; // Map as an image.
-#endif
-
- DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile);
-};
-
-} // namespace base
-
-#endif // BASE_FILES_MEMORY_MAPPED_FILE_H_
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