service: Add global scan support getters (9f59698f) · Commits · e / os / android_packages_modules_Bluetooth

system/service/adapter.cpp

+40 −13

Original line number	Diff line number	Diff line
		@@ -20,6 +20,9 @@

		#include "service/logging_helpers.h"

		using std::lock_guard;
		using std::mutex;

		namespace bluetooth {

		// static
		@@ -27,14 +30,20 @@ const char Adapter::kDefaultAddress[] = "00:00:00:00:00:00";
		// static
		const char Adapter::kDefaultName[] = "not-initialized";

		// TODO(armansito): The following constants come straight from
		// packages/apps/Bluetooth/src/c/a/b/btservice/AdapterService.java. It would be
		// nice to know if there were a way to obtain these values from the stack
		// instead of hardcoding them here.

		// The minimum number of advertising instances required for multi-advertisement
		// support.
		//
		// TODO(armansito): This number comes straight from
		// packages/apps/Bluetooth/src/c/a/b/btservice/AdapterService.java. It would be
		// nice to know if there were a way to obtain this number from the stack instead
		// of hardcoding it here.
		const char kMinAdvInstancesForMultiAdv = 5;
		const int kMinAdvInstancesForMultiAdv = 5;

		// Used when determining if offloaded scan filtering is supported.
		const int kMinOffloadedFilters = 10;

		// Used when determining if offloaded scan batching is supported.
		const int kMinOffloadedScanStorageBytes = 1024;

		void Adapter::Observer::OnAdapterStateChanged(Adapter* adapter,
		AdapterState prev_state,
		@@ -64,12 +73,12 @@ Adapter::~Adapter() {
		}

		void Adapter::AddObserver(Observer* observer) {
		std::lock_guard<std::mutex> lock(observers_lock_);
		lock_guard<mutex> lock(observers_lock_);
		observers_.AddObserver(observer);
		}

		void Adapter::RemoveObserver(Observer* observer) {
		std::lock_guard<std::mutex> lock(observers_lock_);
		lock_guard<mutex> lock(observers_lock_);
		observers_.RemoveObserver(observer);
		}

		@@ -163,15 +172,32 @@ std::string Adapter::GetAddress() const {
		return address_.Get();
		}

		bool Adapter::IsMultiAdvertisementSupported() const {
		bool Adapter::IsMultiAdvertisementSupported() {
		lock_guard<mutex> lock(local_le_features_lock_);
		return local_le_features_.max_adv_instance >= kMinAdvInstancesForMultiAdv;
		}

		bool Adapter::IsDeviceConnected(const std::string& device_address) {
		std::lock_guard<std::mutex> lock(connected_devices_lock_);
		lock_guard<mutex> lock(connected_devices_lock_);
		return connected_devices_.find(device_address) != connected_devices_.end();
		}

		int Adapter::GetTotalNumberOfTrackableAdvertisements() {
		lock_guard<mutex> lock(local_le_features_lock_);
		return local_le_features_.total_trackable_advertisers;
		}

		bool Adapter::IsOffloadedFilteringSupported() {
		lock_guard<mutex> lock(local_le_features_lock_);
		return local_le_features_.max_adv_filter_supported >= kMinOffloadedFilters;
		}

		bool Adapter::IsOffloadedScanBatchingSupported() {
		lock_guard<mutex> lock(local_le_features_lock_);
		return local_le_features_.scan_result_storage_size >=
		kMinOffloadedScanStorageBytes;
		}

		LowEnergyClientFactory* Adapter::GetLowEnergyClientFactory() const {
		return ble_client_factory_.get();
		}
		@@ -233,6 +259,7 @@ void Adapter::AdapterPropertiesCallback(bt_status_t status,
		break;
		}
		case BT_PROPERTY_LOCAL_LE_FEATURES: {
		lock_guard<mutex> lock(local_le_features_lock_);
		if (property->len != sizeof(bt_local_le_features_t)) {
		LOG(WARNING) << "Malformed value received for property: "
		<< "BT_PROPERTY_LOCAL_LE_FEATURES";
		@@ -272,14 +299,14 @@ void Adapter::AclStateChangedCallback(bt_status_t status,

		// Introduce a scope to manage \|connected_devices_lock_\| with RAII.
		{
		std::lock_guard<std::mutex> lock(connected_devices_lock_);
		lock_guard<mutex> lock(connected_devices_lock_);
		if (connected)
		connected_devices_.insert(device_address);
		else
		connected_devices_.erase(device_address);
		}

		std::lock_guard<std::mutex> lock(observers_lock_);
		lock_guard<mutex> lock(observers_lock_);
		FOR_EACH_OBSERVER(
		Observer, observers_,
		OnDeviceConnectionStateChanged(this, device_address, connected));
		@@ -310,7 +337,7 @@ void Adapter::NotifyAdapterStateChanged(AdapterState prev_state,
		if (prev_state == new_state)
		return;

		std::lock_guard<std::mutex> lock(observers_lock_);
		lock_guard<mutex> lock(observers_lock_);
		FOR_EACH_OBSERVER(Observer, observers_,
		OnAdapterStateChanged(this, prev_state, new_state));
		}

system/service/adapter.h

+12 −1

Original line number	Diff line number	Diff line
		@@ -102,13 +102,23 @@ class Adapter : public hal::BluetoothInterface::Observer {

		// Returns true if the local adapter supports the Low-Energy
		// multi-advertisement feature.
		bool IsMultiAdvertisementSupported() const;
		bool IsMultiAdvertisementSupported();

		// Returns true if the remote device with address \|device_address\| is
		// currently connected. This is not a const method as it modifies the state of
		// the associated internal mutex.
		bool IsDeviceConnected(const std::string& device_address);

		// Returns the total number of trackable advertisements as supported by the
		// underlying hardware.
		int GetTotalNumberOfTrackableAdvertisements();

		// Returns true if hardware-backed scan filtering is supported.
		bool IsOffloadedFilteringSupported();

		// Returns true if hardware-backed batch scanning is supported.
		bool IsOffloadedScanBatchingSupported();

		// Returns a pointer to the LowEnergyClientFactory. This can be used to
		// register per-application LowEnergyClient instances to perform BLE GAP
		// operations.
		@@ -152,6 +162,7 @@ class Adapter : public hal::BluetoothInterface::Observer {
		// The current set of supported LE features as obtained from the stack. The
		// values here are all initially set to 0 and updated when the corresponding
		// adapter property has been received from the stack.
		std::mutex local_le_features_lock_;
		bt_local_le_features_t local_le_features_;

		// List of observers that are interested in notifications from us.