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/bind.h"
   6 #include "base/files/file.h"
   7 #include "base/location.h"
   8 #include "base/logging.h"
   9 #include "base/threading/worker_pool.h"
  10 #include "dbus/file_descriptor.h"
  11
  12 namespace dbus {
  13
  14 void CHROME_DBUS_EXPORT FileDescriptor::Deleter::operator()(
  15     FileDescriptor* fd) {
  16   base::WorkerPool::PostTask(
  17       FROM_HERE, base::Bind(&base::DeletePointer<FileDescriptor>, fd), false);
  18 }
  19
  20 FileDescriptor::~FileDescriptor() {
  21   if (owner_)
  22     base::File auto_closer(value_);
  23 }
  24
  25 int FileDescriptor::value() const {
  26   CHECK(valid_);
  27   return value_;
  28 }
  29
  30 int FileDescriptor::TakeValue() {
  31   CHECK(valid_);  // NB: check first so owner_ is unchanged if this triggers
  32   owner_ = false;
  33   return value_;
  34 }
  35
  36 void FileDescriptor::CheckValidity() {
  37   base::File file(value_);
  38   base::File::Info info;
  39   bool ok = file.GetInfo(&info);
  40   file.TakePlatformFile();  // Prevent |value_| from being closed by |file|.
  41   valid_ = (ok && !info.is_directory);
  42 }
  43
  44 }  // namespace dbus