device/hid/hid_service.h

   1 // Copyright 2014 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_HID_HID_SERVICE_H_
   6 #define DEVICE_HID_HID_SERVICE_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/memory/ref_counted.h"
  13 #include "base/single_thread_task_runner.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "device/hid/hid_device_info.h"
  16
  17 namespace device {
  18
  19 class HidConnection;
  20
  21 class HidService {
  22  public:
  23   static HidService* GetInstance(
  24       scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
  25
  26   // Enumerates and returns a list of device identifiers.
  27   virtual void GetDevices(std::vector<HidDeviceInfo>* devices);
  28
  29   // Fills in a DeviceInfo struct with info for the given device_id.
  30   // Returns |true| if successful or |false| if |device_id| is invalid.
  31   bool GetDeviceInfo(const HidDeviceId& device_id, HidDeviceInfo* info) const;
  32
  33   virtual scoped_refptr<HidConnection> Connect(
  34       const HidDeviceId& device_id) = 0;
  35
  36  protected:
  37   friend class HidConnectionTest;
  38
  39   typedef std::map<HidDeviceId, HidDeviceInfo> DeviceMap;
  40
  41   HidService();
  42   virtual ~HidService();
  43
  44   void AddDevice(const HidDeviceInfo& info);
  45   void RemoveDevice(const HidDeviceId& device_id);
  46   const DeviceMap& GetDevicesNoEnumerate() const;
  47
  48   base::ThreadChecker thread_checker_;
  49
  50  private:
  51   class Destroyer;
  52
  53   DeviceMap devices_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(HidService);
  56 };
  57
  58 }  // namespace device
  59
  60 #endif  // DEVICE_HID_HID_SERVICE_H_