chrome/browser/media_galleries/linux/mtp_device_task_helper_map_service.h

   1 // Copyright 2013 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 CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_MAP_SERVICE_H_
   6 #define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_MAP_SERVICE_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/lazy_instance.h"
  12
  13 class MTPDeviceTaskHelper;
  14
  15 // MTPDeviceTaskHelperMapService manages MTPDeviceTaskHelper objects.
  16 // MTPDeviceTaskHelperMapService lives on the UI thread.
  17 class MTPDeviceTaskHelperMapService {
  18  public:
  19   static MTPDeviceTaskHelperMapService* GetInstance();
  20
  21   // Creates and returns the MTPDeviceTaskHelper object for the storage device
  22   // specified by the |storage_name|.
  23   MTPDeviceTaskHelper* CreateDeviceTaskHelper(const std::string& storage_name);
  24
  25   // Destroys the MTPDeviceTaskHelper object created by
  26   // CreateDeviceTaskHelper().
  27   // |storage_name| specifies the name of the storage device.
  28   void DestroyDeviceTaskHelper(const std::string& storage_name);
  29
  30   // Gets the MTPDeviceTaskHelper object associated with the device storage.
  31   // |storage_name| specifies the name of the storage device.
  32   // Return NULL if the |storage_name| is no longer valid (e.g. because the
  33   // corresponding storage device is detached, etc).
  34   MTPDeviceTaskHelper* GetDeviceTaskHelper(const std::string& storage_name);
  35
  36  private:
  37   friend struct base::DefaultLazyInstanceTraits<MTPDeviceTaskHelperMapService>;
  38
  39   // Key: Storage name.
  40   // Value: MTPDeviceTaskHelper object.
  41   typedef std::map<std::string, MTPDeviceTaskHelper*> TaskHelperMap;
  42
  43   // Get access to this class using GetInstance() method.
  44   MTPDeviceTaskHelperMapService();
  45   ~MTPDeviceTaskHelperMapService();
  46
  47   // Mapping of |storage_name| and MTPDeviceTaskHelper*.
  48   // TaskHelperMap owns MTPDeviceTaskHelper objects.
  49   TaskHelperMap task_helper_map_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(MTPDeviceTaskHelperMapService);
  52 };
  53
  54 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_MAP_SERVICE_H_