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
3// found in the LICENSE file.
4
5#include "base/files/file.h"
6#include "base/logging.h"
7#include "dbus/file_descriptor.h"
8
9namespace dbus {
10
11FileDescriptor::~FileDescriptor() {
12  if (owner_)
13    base::File auto_closer(value_);
14}
15
16int FileDescriptor::value() const {
17  CHECK(valid_);
18  return value_;
19}
20
21int FileDescriptor::TakeValue() {
22  CHECK(valid_);  // NB: check first so owner_ is unchanged if this triggers
23  owner_ = false;
24  return value_;
25}
26
27void FileDescriptor::CheckValidity() {
28  base::File file(value_);
29  base::File::Info info;
30  bool ok = file.GetInfo(&info);
31  file.TakePlatformFile();  // Prevent |value_| from being closed by |file|.
32  valid_ = (ok && !info.is_directory);
33}
34
35}  // namespace dbus
36