bluetooth: Add characteristicvaluechanged event

content/browser/bluetooth/bluetooth_dispatcher_host.h

 // Copyright 2014 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 CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/containers/scoped_ptr_map.h"
 #include "base/id_map.h"
@@ skipping 64 matching lines @@
                              bool powered) override;
   void DeviceAdded(device::BluetoothAdapter* adapter,
                    device::BluetoothDevice* device) override;
   void DeviceRemoved(device::BluetoothAdapter* adapter,
                      device::BluetoothDevice* device) override;
   void GattCharacteristicValueChanged(
       device::BluetoothAdapter* adapter,
       device::BluetoothGattCharacteristic* characteristic,
       const std::vector<uint8>& value) override;
 
+  // Sends an IPC to the thread informing that a the characteristic's
+  // value changed.
+  void NotifyActiveCharacteristic(int thread_id,
+                                  const std::string& characteristic_instance_id,
+                                  const std::vector<uint8>& value);
+
   // IPC Handlers, see definitions in bluetooth_messages.h.
   void OnRequestDevice(
       int thread_id,
       int request_id,
       int frame_routing_id,
       const std::vector<content::BluetoothScanFilter>& filters,
       const std::vector<device::BluetoothUUID>& optional_services);
   void OnConnectGATT(int thread_id, int request_id,
                      const std::string& device_instance_id);
   void OnGetPrimaryService(int thread_id,
@@ skipping 10 matching lines @@
   void OnWriteValue(int thread_id,
                     int request_id,
                     const std::string& characteristic_instance_id,
                     const std::vector<uint8_t>& value);
   void OnStartNotifications(int thread_id,
                             int request_id,
                             const std::string& characteristic_instance_id);
   void OnStopNotifications(int thread_id,
                            int request_id,
                            const std::string& characteristic_instance_id);
+  void OnRegisterCharacteristicObject(
+      int thread_id,
+      const std::string& characteristic_instance_id);
+  void OnUnregisterCharacteristicObject(
+      int thread_id,
+      const std::string& characteristic_instance_id);
 
   // Callbacks for BluetoothAdapter::StartDiscoverySession.
   void OnDiscoverySessionStarted(
       int chooser_id,
       scoped_ptr<device::BluetoothDiscoverySession> discovery_session);
   void OnDiscoverySessionStartedError(int chooser_id);
 
   // BluetoothChooser::EventHandler:
   void OnBluetoothChooserEvent(int chooser_id,
                                BluetoothChooser::Event event,
@@ skipping 77 matching lines @@
   // Map of characteristic_instance_id to service_instance_id.
   std::map<std::string, std::string> characteristic_to_service_;
 
   // Map that matches characteristic_instance_id to notify session.
   // TODO(ortuno): Also key by thread_id once support for web workers,
   // is added: http://crbug.com/537372
   base::ScopedPtrMap<std::string,
                      scoped_ptr<device::BluetoothGattNotifySession>>
       characteristic_id_to_notify_session_;
 
+  // Map of characteristic_instance_id to a set of thread ids.
+  // A thread_id in the set represents a BluetoothDispatcher that
+  // needs to be notified of changes to the characteristic.
+  std::map<std::string, std::set<int>> active_characteristic_threads_;

[palmer, 2015/10/19 19:23:33]

Is int the exact right type for a thread ID?

[ortuno, 2015/10/19 20:09:18]

This is a Worker's thread ID which is an int.

https://code.google.com/p/chromium/codesearch#chromium/src/content/public/chi...

+
   // Defines how long to scan for and how long to discover services for.
   int current_delay_time_;
 
   // A BluetoothAdapter instance representing an adapter of the system.
   scoped_refptr<device::BluetoothAdapter> adapter_;
 
   // Automatically stops Bluetooth discovery a set amount of time after it was
   // started. We have a single timer for all of Web Bluetooth because it's
   // simpler than tracking timeouts for each RequestDeviceSession individually,
   // and because there's no harm in extending the length of a few discovery
   // sessions when other sessions are active.
   base::Timer discovery_session_timer_;
 
   // Retain BluetoothGattConnection objects to keep connections open.
   // TODO(scheib): Destroy as connections are closed. http://crbug.com/539643
   ScopedVector<device::BluetoothGattConnection> connections_;
 
   // |weak_ptr_on_ui_thread_| provides weak pointers, e.g. for callbacks, and
   // because it exists and has been bound to the UI thread enforces that all
   // copies verify they are also used on the UI thread.
   base::WeakPtr<BluetoothDispatcherHost> weak_ptr_on_ui_thread_;
   base::WeakPtrFactory<BluetoothDispatcherHost> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_