| // 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. |
| |
| #include "base/files/memory_mapped_file.h" |
| |
| #include "base/files/file_path.h" |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| MemoryMappedFile::~MemoryMappedFile() { |
| CloseHandles(); |
| } |
| |
| bool MemoryMappedFile::Initialize(const FilePath& file_name) { |
| if (IsValid()) |
| return false; |
| |
| if (!MapFileToMemory(file_name)) { |
| CloseHandles(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool MemoryMappedFile::Initialize(PlatformFile file) { |
| if (IsValid()) |
| return false; |
| |
| file_ = file; |
| |
| if (!MapFileToMemoryInternal()) { |
| CloseHandles(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool MemoryMappedFile::IsValid() const { |
| return data_ != NULL; |
| } |
| |
| bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) { |
| file_ = CreatePlatformFile(file_name, PLATFORM_FILE_OPEN | PLATFORM_FILE_READ, |
| NULL, NULL); |
| |
| if (file_ == kInvalidPlatformFileValue) { |
| DLOG(ERROR) << "Couldn't open " << file_name.AsUTF8Unsafe(); |
| return false; |
| } |
| |
| return MapFileToMemoryInternal(); |
| } |
| |
| } // namespace base |