device/usb/usb_service.cc

   1 // Copyright 2015 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 "device/usb/usb_service.h"
   6
   7 #include "base/at_exit.h"
   8 #include "base/bind.h"
   9 #include "components/device_event_log/device_event_log.h"
  10 #include "device/usb/usb_device.h"
  11 #include "device/usb/usb_service_impl.h"
  12
  13 namespace device {
  14
  15 UsbService::Observer::~Observer() {}
  16
  17 void UsbService::Observer::OnDeviceAdded(scoped_refptr<UsbDevice> device) {
  18 }
  19
  20 void UsbService::Observer::OnDeviceRemoved(scoped_refptr<UsbDevice> device) {
  21 }
  22
  23 void UsbService::Observer::OnDeviceRemovedCleanup(
  24     scoped_refptr<UsbDevice> device) {
  25 }
  26
  27 void UsbService::Observer::WillDestroyUsbService() {}
  28
  29 // static
  30 scoped_ptr<UsbService> UsbService::Create(
  31     scoped_refptr<base::SequencedTaskRunner> blocking_task_runner) {
  32   return make_scoped_ptr(new UsbServiceImpl(blocking_task_runner));
  33 }
  34
  35 UsbService::~UsbService() {
  36   FOR_EACH_OBSERVER(Observer, observer_list_, WillDestroyUsbService());
  37 }
  38
  39 UsbService::UsbService() {}
  40
  41 void UsbService::AddObserver(Observer* observer) {
  42   DCHECK(CalledOnValidThread());
  43   observer_list_.AddObserver(observer);
  44 }
  45
  46 void UsbService::RemoveObserver(Observer* observer) {
  47   DCHECK(CalledOnValidThread());
  48   observer_list_.RemoveObserver(observer);
  49 }
  50
  51 void UsbService::NotifyDeviceAdded(scoped_refptr<UsbDevice> device) {
  52   DCHECK(CalledOnValidThread());
  53
  54   FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceAdded(device));
  55 }
  56
  57 void UsbService::NotifyDeviceRemoved(scoped_refptr<UsbDevice> device) {
  58   DCHECK(CalledOnValidThread());
  59
  60   FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemoved(device));
  61   FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemovedCleanup(device));
  62 }
  63
  64 }  // namespace device