Reimplement BluetoothSocketChromeOS

device/bluetooth/bluetooth_socket_thread_win.cc

-// Copyright 2014 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 "device/bluetooth/bluetooth_socket_thread_win.h"
-
-#include "base/lazy_instance.h"
-#include "base/sequenced_task_runner.h"
-#include "base/threading/thread.h"
-
-namespace device {
-
-base::LazyInstance<scoped_refptr<BluetoothSocketThreadWin> > g_instance =
-    LAZY_INSTANCE_INITIALIZER;
-
-// static
-scoped_refptr<BluetoothSocketThreadWin> BluetoothSocketThreadWin::Get() {
-  if (!g_instance.Get().get()) {
-    g_instance.Get() = new BluetoothSocketThreadWin();
-  }
-  return g_instance.Get();
-}
-
-BluetoothSocketThreadWin::BluetoothSocketThreadWin()
-    : active_socket_count_(0) {}
-
-BluetoothSocketThreadWin::~BluetoothSocketThreadWin() {}
-
-void BluetoothSocketThreadWin::OnSocketActivate() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  active_socket_count_++;
-  EnsureStarted();
-}
-
-void BluetoothSocketThreadWin::OnSocketDeactivate() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  active_socket_count_--;
-  if (active_socket_count_ == 0 && thread_) {
-    thread_->Stop();
-    thread_.reset(NULL);
-    task_runner_ = NULL;
-  }
-}
-
-void BluetoothSocketThreadWin::EnsureStarted() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (thread_)
-    return;
-
-  base::Thread::Options thread_options;
-  thread_options.message_loop_type = base::MessageLoop::TYPE_IO;
-  thread_.reset(new base::Thread("BluetoothSocketThreadWin"));
-  thread_->StartWithOptions(thread_options);
-  task_runner_ = thread_->message_loop_proxy();
-}
-
-scoped_refptr<base::SequencedTaskRunner> BluetoothSocketThreadWin::task_runner()
-    const {
-  DCHECK(active_socket_count_ > 0);
-  DCHECK(thread_);
-  DCHECK(task_runner_);
-
-  return task_runner_;
-}
-
-}  // namespace device