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      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
     36