device/devices_app/devices_app.h

   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 #ifndef DEVICE_DEVICES_DEVICES_APP_H_
   6 #define DEVICE_DEVICES_DEVICES_APP_H_
   7
   8 #include "base/cancelable_callback.h"
   9 #include "base/macros.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "mojo/application/public/cpp/application_delegate.h"
  13 #include "mojo/application/public/cpp/interface_factory.h"
  14
  15 namespace base {
  16 class SequencedTaskRunner;
  17 }
  18
  19 namespace mojo {
  20 class ApplicationImpl;
  21 }
  22
  23 namespace device {
  24
  25 namespace usb {
  26 class DeviceManager;
  27 }
  28
  29 class DevicesApp : public mojo::ApplicationDelegate,
  30                    public mojo::InterfaceFactory<usb::DeviceManager> {
  31  public:
  32   explicit DevicesApp(
  33       scoped_refptr<base::SequencedTaskRunner> service_task_runner);
  34   ~DevicesApp() override;
  35
  36  private:
  37   class USBServiceInitializer;
  38
  39   // mojo::ApplicationDelegate:
  40   void Initialize(mojo::ApplicationImpl* app) override;
  41   bool ConfigureIncomingConnection(
  42       mojo::ApplicationConnection* connection) override;
  43   void Quit() override;
  44
  45   // mojo::InterfaceFactory<usb::DeviceManager>:
  46   void Create(mojo::ApplicationConnection* connection,
  47               mojo::InterfaceRequest<usb::DeviceManager> request) override;
  48
  49   // Mojo error handler to track device manager count.
  50   void OnConnectionError();
  51
  52   // Sets the app for destruction after a period of idle time. If any top-level
  53   // services (e.g. usb::DeviceManager) are bound before the timeout elapses,
  54   // it's canceled.
  55   void StartIdleTimer();
  56
  57   mojo::ApplicationImpl* app_impl_;
  58   scoped_ptr<USBServiceInitializer> service_initializer_;
  59   scoped_refptr<base::SequencedTaskRunner> service_task_runner_;
  60   size_t active_device_manager_count_;
  61
  62   // Callback used to shut down the app after a period of inactivity.
  63   base::CancelableClosure idle_timeout_callback_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(DevicesApp);
  66 };
  67
  68 }  // naespace device
  69
  70 #endif  // DEVICE_DEVICES_DEVICES_APP_H_