dbus/file_descriptor.cc

   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
   9 namespace dbus {
  10
  11 FileDescriptor::~FileDescriptor() {
  12   if (owner_)
  13     base::File auto_closer(value_);
  14 }
  15
  16 int FileDescriptor::value() const {
  17   CHECK(valid_);
  18   return value_;
  19 }
  20
  21 int FileDescriptor::TakeValue() {
  22   CHECK(valid_);  // NB: check first so owner_ is unchanged if this triggers
  23   owner_ = false;
  24   return value_;
  25 }
  26
  27 void 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