| // 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; |
| |
| file_.Initialize(file_name, File::FLAG_OPEN | File::FLAG_READ); |
| |
| if (!file_.IsValid()) { |
| DLOG(ERROR) << "Couldn't open " << file_name.AsUTF8Unsafe(); |
| return false; |
| } |
| |
| if (!MapFileToMemory()) { |
| CloseHandles(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool MemoryMappedFile::Initialize(File file) { |
| if (IsValid()) |
| return false; |
| |
| file_ = file.Pass(); |
| |
| if (!MapFileToMemory()) { |
| CloseHandles(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool MemoryMappedFile::IsValid() const { |
| return data_ != NULL; |
| } |
| |
| } // namespace base |