| // Copyright 2016 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_ADAPTER_FACTORY_WRAPPER_H_ |
| #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_WRAPPER_H_ |
| |
| #include <unordered_set> |
| |
| #include "base/lazy_instance.h" |
| #include "base/macros.h" |
| #include "base/threading/thread_checker.h" |
| #include "device/bluetooth/bluetooth_adapter.h" |
| #include "device/bluetooth/bluetooth_export.h" |
| |
| namespace device { |
| |
| // Wrapper around BluetoothAdapterFactory that allows us to change |
| // the underlying BluetoothAdapter object and have the observers |
| // observe the new instance of the object. |
| // TODO(ortuno): Once there is no need to swap the adapter to change its |
| // behavior observers should add/remove themselves to/from the adapter. |
| // http://crbug.com/603291 |
| class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterFactoryWrapper { |
| public: |
| using AcquireAdapterCallback = base::OnceCallback<void(BluetoothAdapter*)>; |
| |
| ~BluetoothAdapterFactoryWrapper(); |
| |
| static BluetoothAdapterFactoryWrapper& Get(); |
| |
| // Returns true if the platform supports Bluetooth Low Energy or if |
| // SetBluetoothAdapterForTesting has been called. |
| bool IsLowEnergySupported(); |
| |
| // Adds |observer| to the set of adapter observers. If another observer has |
| // acquired the adapter in the past it adds |observer| as an observer to that |
| // adapter, otherwise it gets a new adapter and adds |observer| to it. Runs |
| // |callback| with the adapter |observer| has been added to. |
| void AcquireAdapter(BluetoothAdapter::Observer* observer, |
| AcquireAdapterCallback callback); |
| // Removes |observer| from the list of adapter observers if |observer| |
| // has acquired the adapter in the past. If there are no more observers |
| // it deletes the reference to the adapter. |
| void ReleaseAdapter(BluetoothAdapter::Observer* observer); |
| |
| // Returns an adapter if |observer| has acquired an adapter in the past and |
| // this instance holds a reference to an adapter. Otherwise returns nullptr. |
| BluetoothAdapter* GetAdapter(BluetoothAdapter::Observer* observer); |
| |
| // Sets a new BluetoothAdapter to be returned by GetAdapter. When setting |
| // a new adapter all observers from the old adapter are removed and added |
| // to |mock_adapter|. |
| void SetBluetoothAdapterForTesting( |
| scoped_refptr<BluetoothAdapter> mock_adapter); |
| |
| private: |
| // friend LazyInstance to permit access to private constructor. |
| friend base::LazyInstanceTraitsBase<BluetoothAdapterFactoryWrapper>; |
| |
| BluetoothAdapterFactoryWrapper(); |
| |
| void OnGetAdapter(AcquireAdapterCallback continuation, |
| scoped_refptr<BluetoothAdapter> adapter); |
| |
| bool HasAdapter(BluetoothAdapter::Observer* observer); |
| void AddAdapterObserver(BluetoothAdapter::Observer* observer); |
| void RemoveAdapterObserver(BluetoothAdapter::Observer* observer); |
| |
| // Sets |adapter_| to a BluetoothAdapter instance and register observers, |
| // releasing references to previous |adapter_|. |
| void set_adapter(scoped_refptr<BluetoothAdapter> adapter); |
| |
| // A BluetoothAdapter instance representing an adapter of the system. |
| scoped_refptr<BluetoothAdapter> adapter_; |
| |
| // We keep a list of all observers so that when the adapter gets swapped, |
| // we can remove all observers from the old adapter and add them to the |
| // new adapter. |
| std::unordered_set<BluetoothAdapter::Observer*> adapter_observers_; |
| |
| // Should only be called on the UI thread. |
| base::ThreadChecker thread_checker_; |
| |
| // Weak pointer factory for generating 'this' pointers that might live longer |
| // than we do. |
| // Note: This should remain the last member so it'll be destroyed and |
| // invalidate its weak pointers before any other members are destroyed. |
| base::WeakPtrFactory<BluetoothAdapterFactoryWrapper> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterFactoryWrapper); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_WRAPPER_H_ |