| // |
| // Copyright 2015 Google, Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at: |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #pragma once |
| |
| #include <atomic> |
| #include <functional> |
| #include <map> |
| #include <mutex> |
| |
| #include <bluetooth/uuid.h> |
| |
| #include "service/bluetooth_instance.h" |
| #include "service/common/bluetooth/advertise_data.h" |
| #include "service/common/bluetooth/advertise_settings.h" |
| #include "service/common/bluetooth/low_energy_constants.h" |
| #include "service/common/bluetooth/scan_filter.h" |
| #include "service/common/bluetooth/scan_result.h" |
| #include "service/common/bluetooth/scan_settings.h" |
| #include "service/hal/bluetooth_gatt_interface.h" |
| |
| namespace bluetooth { |
| |
| class Adapter; |
| |
| // A LowEnergyAdvertiser represents an application's handle to perform various |
| // Bluetooth Low Energy GAP operations. Instances cannot be created directly and |
| // should be obtained through the factory. |
| class LowEnergyAdvertiser : public BluetoothInstance { |
| public: |
| LowEnergyAdvertiser(const LowEnergyAdvertiser&) = delete; |
| LowEnergyAdvertiser& operator=(const LowEnergyAdvertiser&) = delete; |
| |
| // The destructor automatically unregisters this client instance from the |
| // stack. |
| ~LowEnergyAdvertiser() override; |
| |
| // Callback type used to return the result of asynchronous operations below. |
| using StatusCallback = std::function<void(BLEStatus)>; |
| |
| // Starts advertising based on the given advertising and scan response |
| // data and the provided |settings|. Reports the result of the operation in |
| // |callback|. Return true on success, false otherwise. Please see logs for |
| // details in case of error. |
| bool StartAdvertising(const AdvertiseSettings& settings, |
| const AdvertiseData& advertise_data, |
| const AdvertiseData& scan_response, |
| const StatusCallback& callback); |
| |
| // Stops advertising if it was already started. Reports the result of the |
| // operation in |callback|. |
| bool StopAdvertising(const StatusCallback& callback); |
| |
| // Returns true if advertising has been started. |
| bool IsAdvertisingStarted() const; |
| |
| // Returns the state of pending advertising operations. |
| bool IsStartingAdvertising() const; |
| bool IsStoppingAdvertising() const; |
| |
| // Returns the current advertising settings. |
| const AdvertiseSettings& advertise_settings() const { |
| return advertise_settings_; |
| } |
| |
| // BluetoothClientInstace overrides: |
| const Uuid& GetAppIdentifier() const override; |
| int GetInstanceId() const override; |
| |
| private: |
| friend class LowEnergyAdvertiserFactory; |
| |
| // Constructor shouldn't be called directly as instances are meant to be |
| // obtained from the factory. |
| LowEnergyAdvertiser(const Uuid& uuid, int advertiser_id); |
| |
| // BluetoothGattInterface::AdvertiserObserver overrides: |
| void SetDataCallback(uint8_t advertiser_id, uint8_t status); |
| void SetParamsCallback(uint8_t advertiser_id, uint8_t status); |
| void EnableCallback(bool enable, uint8_t advertiser_id, uint8_t status); |
| |
| // Calls and clears the pending callbacks. |
| void InvokeAndClearStartCallback(BLEStatus status); |
| void InvokeAndClearStopCallback(BLEStatus status); |
| |
| // See getters above for documentation. |
| Uuid app_identifier_; |
| int advertiser_id_; |
| |
| // Protects advertising-related members below. |
| std::mutex adv_fields_lock_; |
| |
| // Latest advertising settings. |
| AdvertiseSettings advertise_settings_; |
| |
| std::atomic_bool adv_started_; |
| std::unique_ptr<StatusCallback> adv_start_callback_; |
| std::unique_ptr<StatusCallback> adv_stop_callback_; |
| }; |
| |
| // LowEnergyAdvertiserFactory is used to register and obtain a per-application |
| // LowEnergyAdvertiser instance. Users should call RegisterInstance to obtain |
| // their |
| // own unique LowEnergyAdvertiser instance that has been registered with the |
| // Bluetooth stack. |
| class LowEnergyAdvertiserFactory : public BluetoothInstanceFactory { |
| public: |
| // Don't construct/destruct directly except in tests. Instead, obtain a handle |
| // from an Adapter instance. |
| explicit LowEnergyAdvertiserFactory(); |
| LowEnergyAdvertiserFactory(const LowEnergyAdvertiserFactory&) = delete; |
| LowEnergyAdvertiserFactory& operator=(const LowEnergyAdvertiserFactory&) = |
| delete; |
| |
| ~LowEnergyAdvertiserFactory() override; |
| |
| // BluetoothInstanceFactory override: |
| bool RegisterInstance(const Uuid& app_uuid, |
| const RegisterCallback& callback) override; |
| |
| private: |
| friend class LowEnergyAdvertiser; |
| |
| // BluetoothGattInterface::AdvertiserObserver overrides: |
| void RegisterAdvertiserCallback(const RegisterCallback& callback, |
| const Uuid& app_uuid, uint8_t advertiser_id, |
| uint8_t status); |
| |
| // Map of pending calls to register. |
| std::mutex pending_calls_lock_; |
| std::unordered_set<Uuid> pending_calls_; |
| }; |
| |
| } // namespace bluetooth |