Implement BluetoothRemoteGattCharacteristicWin::StartNotifySession and related unit tests

device/bluetooth/bluetooth_task_manager_win.h

 // Copyright (c) 2012 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_TASK_MANAGER_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_TASK_MANAGER_WIN_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 81 matching lines @@
      virtual void DiscoveryStarted(bool success) {}
      virtual void DiscoveryStopped() {}
      // Called when the adapter has just been polled for the list of *all* known
      // devices. This includes devices previously paired, devices paired using
      // the underlying Operating System UI, and devices discovered recently due
      // to an active discovery session. Note that for a given device (address),
      // the associated state can change over time. For example, during a
      // discovery session, the "friendly" name may initially be "unknown" before
      // the actual name is retrieved in subsequent poll events.
      virtual void DevicesPolled(const ScopedVector<DeviceState>& devices) {}
-     virtual void OnAttemptReadGattCharacteristic() {}
-     virtual void OnAttemptWriteGattCharacteristic() {}
   };
 
   explicit BluetoothTaskManagerWin(
       scoped_refptr<base::SequencedTaskRunner> ui_task_runner);
 
   static BluetoothUUID BluetoothLowEnergyUuidToBluetoothUuid(
       const BTH_LE_UUID& bth_le_uuid);
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
@@ skipping 14 matching lines @@
   typedef base::Callback<void(HRESULT)> HResultCallback;
   typedef base::Callback<
       void(scoped_ptr<BTH_LE_GATT_CHARACTERISTIC>, uint16_t, HRESULT)>
       GetGattIncludedCharacteristicsCallback;
   typedef base::Callback<
       void(scoped_ptr<BTH_LE_GATT_DESCRIPTOR>, uint16_t, HRESULT)>
       GetGattIncludedDescriptorsCallback;
   typedef base::Callback<void(scoped_ptr<BTH_LE_GATT_CHARACTERISTIC_VALUE>,
                               HRESULT)>
       ReadGattCharacteristicValueCallback;
+  typedef base::Callback<void(scoped_ptr<std::vector<uint8_t>>)>
+      GattCharacteristicValueChangedCallback;
+  typedef base::Callback<void(PVOID, HRESULT)> GattEventRegistrationCallback;
 
   // Get all included characteristics of a given service. The service is
   // uniquely identified by its |uuid| and |attribute_handle| with service
   // device |service_path|. The result is returned asynchronously through
   // |callback|.
   void PostGetGattIncludedCharacteristics(
       const base::FilePath& service_path,
       const BluetoothUUID& uuid,
       uint16_t attribute_handle,
       const GetGattIncludedCharacteristicsCallback& callback);
@@ skipping 15 matching lines @@
 
   // Post write the value of a given |characteristic| in service with
   // |service_path| to |new_value|. The operation result is returned
   // asynchronously through |callback|.
   void PostWriteGattCharacteristicValue(
       const base::FilePath& service_path,
       const PBTH_LE_GATT_CHARACTERISTIC characteristic,
       const std::vector<uint8_t>& new_value,
       const HResultCallback& callback);
 
+  // Post register a given |characteristic|'s value change notification of a
+  // service with |service_path|. |registered_callback| is the function to be
+  // invoked if the event occured. The operation result is returned
+  // asynchronously through |callback|.

[ortuno, 2016/03/15 02:55:31]

Post a task to register to receive value changed notifications from
|characteristic| of |service_path|.

[gogerald1, 2016/03/15 18:28:23]

Done.

+  void PostRegisterGattCharacteristicValueChangedEvent(
+      const base::FilePath& service_path,
+      const PBTH_LE_GATT_CHARACTERISTIC characteristic,
+      const GattEventRegistrationCallback& callback,
+      const GattCharacteristicValueChangedCallback& registered_callback);
+
+  // Post unregister characteristic value change notification. |event_handle|

[ortuno, 2016/03/15 02:55:31]

Post a task to unregister from value change notifications.

[gogerald1, 2016/03/15 18:28:23]

Done.

+  // was returned by PostRegisterGattCharacteristicValueChangedEvent.
+  void PostUnregisterGattCharacteristicValueChangedEvent(PVOID event_handle);
+
  private:
   friend class base::RefCountedThreadSafe<BluetoothTaskManagerWin>;
   friend class BluetoothTaskManagerWinTest;
 
   static const int kPollIntervalMs;
 
   virtual ~BluetoothTaskManagerWin();
 
   // Logs Win32 errors occurring during polling on the worker thread. The method
   // may discard messages to avoid logging being too verbose.
@@ skipping 88 matching lines @@
       BTH_LE_GATT_CHARACTERISTIC characteristic,
       const GetGattIncludedDescriptorsCallback& callback);
   void ReadGattCharacteristicValue(
       base::FilePath device_path,
       BTH_LE_GATT_CHARACTERISTIC characteristic,
       const ReadGattCharacteristicValueCallback& callback);
   void WriteGattCharacteristicValue(base::FilePath service_path,
                                     BTH_LE_GATT_CHARACTERISTIC characteristic,
                                     std::vector<uint8_t> new_value,
                                     const HResultCallback& callback);
+  void RegisterGattCharacteristicValueChangedEvent(
+      base::FilePath service_path,
+      BTH_LE_GATT_CHARACTERISTIC characteristic,
+      const GattEventRegistrationCallback& callback,
+      const GattCharacteristicValueChangedCallback& registered_callback);
+  void UnregisterGattCharacteristicValueChangedEvent(PVOID event_handle);
 
   // UI task runner reference.
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
 
   scoped_refptr<base::SequencedWorkerPool> worker_pool_;
   scoped_refptr<base::SequencedTaskRunner> bluetooth_task_runner_;
 
   // List of observers interested in event notifications.
   base::ObserverList<Observer> observers_;
 
   // Weak reference of the adapter handle, let BluetoothClassicWrapper handle
   // the close of |adapter_handle_|.
   HANDLE adapter_handle_;
 
   // indicates whether the adapter is in discovery mode or not.
   bool discovering_;
 
   // Use for discarding too many log messages.
   base::TimeTicks current_logging_batch_ticks_;
   int current_logging_batch_count_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothTaskManagerWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_TASK_MANAGER_WIN_H_