Android 9.0 CarService 分析

一. CarService 启动流程：

1. 启动流程图

 2. SystemServer -> CarServiceHelperService -> CarService

 最终在 CarServiceHelperService 中通过 bindServiceAsUser 启动 CarService

frameworks/base/services/java/com/android/server/SystemServer.java
public final class SystemServer {
  private static final String CAR_SERVICE_HELPER_SERVICE_CLASS =
      "com.android.internal.car.CarServiceHelperService";
  private void run() {
    startBootstrapServices();
    startCoreServices();
    startOtherServices();
    SystemServerInitThreadPool.shutdown();
  }

  private void startOtherServices() {
    mActivityManagerService.systemReady(() -> {
      mSystemServiceManager.startBootPhase(
          SystemService.PHASE_ACTIVITY_MANAGER_READY);
      if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
        mSystemServiceManager.startService(CAR_SERVICE_HELPER_SERVICE_CLASS);
      }
    }
  }
}

frameworks/opt/car/services/src/com/android/internal/car/CarServiceHelperService.java
public class CarServiceHelperService extends SystemService {
  private static final String CAR_SERVICE_INTERFACE = "android.car.ICar";
  @Override
  public void onStart() {
    Intent intent = new Intent();
    intent.setPackage("com.android.car");
    intent.setAction(CAR_SERVICE_INTERFACE);
    getContext().bindServiceAsUser(intent, mCarServiceConnection, Context.BIND_AUTO_CREATE,
                UserHandle.SYSTEM)
    System.loadLibrary("car-framework-service-jni");
  }
}

 3. CarService -> ICarImpl -> Car 相关的 services

 通过 ICarImpl 实现

ackages/services/Car/service/src/com/android/car/CarService.java
package com.android.car;
public class CarService extends Service {
  private ICarImpl mICarImpl;
  private IVehicle mVehicle;
 
  public void onCreate() {
    // mVehicle 实际 VehicleService
    mVehicle = getVehicle();
    mICarImpl = new ICarImpl(this,
                mVehicle,
                SystemInterface.Builder.defaultSystemInterface(this).build(),
                mCanBusErrorNotifier,
                mVehicleInterfaceName);
    mICarImpl.init();
    ServiceManager.addService("car_service", mICarImpl);
    super.onCreate();
  }
  
  @Override
  public IBinder onBind(Intent intent) {
    return mICarImpl;
  }

  // 获取 VehicleService
  private static IVehicle getVehicle() {
    return android.hardware.automotive.vehicle.V2_0.IVehicle.getService();
  }
}

4. ICarImpl 启动 特定的 CarXXXServices，如 CarPowerManagementService/CarPropertyService 等

packages/services/Car/service/src/com/android/car/ICarImpl.java
public class ICarImpl extends ICar.Stub {
  private final CarPowerManagementService mCarPowerManagementService;
  private final CarPropertyService mCarPropertyService;
  private final CarServiceBase[] mAllServices;
  
  // 参数二实际为 VehicleService
  public ICarImpl(Context serviceContext, IVehicle vehicle, SystemInterface systemInterface,
            CanBusErrorNotifier errorNotifier, String vehicleInterfaceName) {

    mHal = new VehicleHal(vehicle);

    mCarPowerManagementService = new CarPowerManagementService(mContext, mHal.getPowerHal(),systemInterface);
    // mHal.getPropertyHal() -> PropertyHalService
    mCarPropertyService = new CarPropertyService(serviceContext, mHal.getPropertyHal());
    mCarAudioService = new CarAudioService(serviceContext, mCarPowerManagementService,
        mCarPropertyService);
    
    List allServices = new ArrayList<>();
    allServices.add(mCarPowerManagementService);
    allServices.add(mCarPropertyService);
    allServices.add(mCarAudioService);
    mAllServices = allServices.toArray(new CarServiceBase[allServices.size()]);
  }
  
  @Override
  public IBinder getCarService(String serviceName) {
    switch (serviceName) {
      case Car.CABIN_SERVICE:
      case Car.HVAC_SERVICE:
        return mCarPropertyService;
    }
  }
}

二. CarService 通信分析，以客户端 HvacController 为例

  1) createCar（）构建Car实例,
  2) void connect() 与CarService建立连接,
  3) getCarManager() 通过service_name获取CarService端细分服务的IBinder，通过装饰模式封装到本地对应的xxManager中.

0. 流程图

右键查看图片

1. ICar 接口 

getCarService 通过 aidl 实现
packages/services/Car/car-lib/src/android/car/ICar.aidl
package android.car;
interface ICar {
  oneway void setCarServiceHelper(in IBinder helper) = 0;
  IBinder getCarService(in String serviceName) = 1;
  int getCarConnectionType() = 2;
}

 2. Car 接口

packages/services/Car/car-lib/src/android/car/Car.java
  private final HashMap mServiceMap = new HashMap<>();

  1) createCar()
  public static Car createCar(Context context, ServiceConnection serviceConnectionListener,
      @Nullable Handler handler) {
    return new Car(context, serviceConnectionListener, handler);
  }

  public Car(Context context, ICar service, @Nullable Handler handler) {
    mEventHandler = determineEventHandler(handler);
    mMainThreadEventHandler = determineMainThreadEventHandler(mEventHandler);
    mService = service; 
  }
  private synchronized ICar getICarOrThrow(){
    return mService;
  }
  
  2) connect()
  public void connect() throws IllegalStateException {
    mConnectionState = STATE_CONNECTING;
    startCarService();
  }
  private void startCarService() {
    Intent intent = new Intent();
    intent.setPackage(CAR_SERVICE_PACKAGE); //"com.android.car"
    intent.setAction(Car.CAR_SERVICE_INTERFACE_NAME); //"android.car.ICar"
    
    boolean bound = mContext.bindServiceAsUser(intent, mServiceConnectionListener,
                Context.BIND_AUTO_CREATE, UserHandle.CURRENT_OR_SELF);
  }
  
  3) getCarManager
  public Object getCarManager(String serviceName){
    CarManagerBase manager;
    ICar service = getICarOrThrow();
    manager = mServiceMap.get(serviceName);
    //如果 service 未启动，则通过 createCarManager 创建启动 service，并最终放入 HashMap中
    if (manager == null) {
      IBinder binder = service.getCarService(serviceName);
      manager = createCarManager(serviceName, binder);
      mServiceMap.put(serviceName, manager);
    }
    return manager;
  }

private CarManagerBase createCarManager(String serviceName, IBinder binder){
  CarManagerBase manager = null;
  switch (serviceName) {
    case AUDIO_SERVICE:
      manager = new CarAudioManager(binder, mContext, mEventHandler);
      break;
    case HVAC_SERVICE:
      manager = new CarHvacManager(binder, mContext, mEventHandler);
      break;
  }
  return manager;
}

3. client 端（以CarHvacApp 为例） 

CarHvacManager(hearting ventilation air conditioning) 通风空调
packages/apps/Car/Hvac/src/com/android/car/hvac/HvacController.java
  @Override
  public void onCreate() {
    super.onCreate();      
    mCarApiClient = Car.createCar(this, mCarConnectionCallback);
    mCarApiClient.connect();
  }
  private final CarConnectionCallback mCarConnectionCallback =
    new CarConnectionCallback() {
      @Override
      public void onConnected(Car car) {
        initHvacManager((CarHvacManager) mCarApiClient.getCarManager(android.car.Car.HVAC_SERVICE));
        mHvacManagerReady.notifyAll();
      }
  }
  private void initHvacManager(CarHvacManager carHvacManager) {
    mHvacManager = carHvacManager;
  }

关键通过 setBooleanProperty()、getBooleanProperty() 接口实现属性切换，功能控制。 

  public void requestRefresh(final Runnable r, final Handler h) {
    final AsyncTask task = new AsyncTask() {
      @Override
      protected Void doInBackground(Void... unused) {
        fetchTemperature(DRIVER_ZONE_ID);
        fetchTemperature(PASSENGER_ZONE_ID);

        fetchAcState();
        fetchHvacPowerState();
      }
    }
  }
  // 空调开关设置，实际通过 getCarManager("android.car.Car.hvac") 获取 manager调用对应方法
  private void fetchAcState() {
    mDataStore.setAcState(mHvacManager.getBooleanProperty(CarHvacManager.ID_ZONED_AC_ON,
               SEAT_ALL));
  }
  public void setAcState(final boolean state) {
    final AsyncTask task = new AsyncTask() {
      protected Void doInBackground(Void... unused) {
        mHvacManager.setBooleanProperty(CarHvacManager.ID_ZONED_AC_ON,
                     SEAT_ALL, state);
      }
    };
    task.execute();
  }
  
  private void fetchHvacPowerState() {
    mDataStore.setHvacPowerState(mHvacManager.getBooleanProperty(
               CarHvacManager.ID_ZONED_HVAC_POWER_ON, SEAT_ALL));
  }
  public void setHvacPowerState(final boolean state) {
    mHvacManager.setBooleanProperty(CarHvacManager.ID_ZONED_HVAC_POWER_ON, SEAT_ALL, state);
    mDataStore.setHvacPowerState(state);
  }

4. CarHvacManager 功能实现 service 端：

CarHvacManager -> CarPropertyManager -> ICarProperty 

packages/services/Car/car-lib/src/android/car/hardware/hvac/CarHvacManager.java
public final class CarHvacManager implements CarManagerBase {
private final CarPropertyManager mCarPropertyMgr;
  public CarHvacManager(IBinder service, Context context, Handler handler) {
    mCarPropertyMgr = new CarPropertyManager(service, handler, DBG, TAG);
  }
  public void setBooleanProperty(@PropertyId int propertyId, int area, boolean val){
    mCarPropertyMgr.setBooleanProperty(propertyId, area, val);
  }
}

packages/services/Car/car-lib/src/android/car/hardware/property/CarPropertyManager.java
  public CarPropertyManager(IBinder service, @Nullable Handler handler, boolean dbg, String tag) {
    mService = ICarProperty.Stub.asInterface(service);   
  }
  public void setBooleanProperty(int prop, int area, boolean val){
    setProperty(Boolean.class, prop, area, val);
  }
  private final ICarProperty mService;
  public  void setProperty(Class clazz, int propId, int area, E val){
    mService.setProperty(new CarPropertyValue<>(propId, area, val));
  }

packages/services/Car/car-lib/src/android/car/hardware/property/ICarProperty.aidl
package android.car.hardware.property;
interface ICarProperty {
  CarPropertyValue getProperty(int prop, int zone) = 3;
  void setProperty(in CarPropertyValue prop) = 4;
  void setProps(in List props) = 5;
}

 5. CarPropertyService -> PropertyHalService -> VehicleHal

CarPropertyService 是 ICarProperty  接口的实现服务

packages/services/Car/service/src/com/android/car/CarPropertyService.java
public class CarPropertyService extends ICarProperty.Stub {
  private final PropertyHalService mHal;
  public CarPropertyService(Context context, PropertyHalService hal) {
    mHal = hal;
    mContext = context;
  }
  @Override
  public void setProperty(CarPropertyValue prop) {
    int propId = prop.getPropertyId();
    ICarImpl.assertPermission(mContext, mHal.getWritePermission(propId));
    mHal.setProperty(prop);
  }
}

packages/services/Car/service/src/com/android/car/hal/PropertyHalService.java
private final VehicleHal mVehicleHal;
public PropertyHalService(VehicleHal vehicleHal) {
  mPropIds = new PropertyHalServiceIds();
  mSubscribedPropIds = new HashSet();
  // 实际指向 VehicleHal
  mVehicleHal = vehicleHal;
}
public void setProperty(CarPropertyValue prop) {
  int halPropId = managerToHalPropId(prop.getPropertyId());
  VehiclePropValue halProp = toVehiclePropValue(prop, halPropId);
  mVehicleHal.set(halProp);
}

 6. VehicleHal -> HalClient -> IVehicle -> VehicleService

packages/services/Car/service/src/com/android/car/hal/VehicleHal.java
public class VehicleHal extends IVehicleCallback.Stub {
  private final ArrayList mAllServices = new ArrayList<>();

  // vehicle 实际为 VehicleService
  public VehicleHal(IVehicle vehicle) {
    mHandlerThread = new HandlerThread("VEHICLE-HAL");
    mPowerHal = new PowerHalService(this);

    //将 VehicleHal 注入 PropertyHalService 中
    mPropertyHal = new PropertyHalService(this);
    mInputHal = new InputHalService(this);
    mVmsHal = new VmsHalService(this);
    mDiagnosticHal = new DiagnosticHalService(this);
    mAllServices.addAll(Arrays.asList(mPowerHal,
                mInputHal,
                mPropertyHal,
                mDiagnosticHal,
                mVmsHal));

    mHalClient = new HalClient(vehicle, mHandlerThread.getLooper(), this /*IVehicleCallback*/);
  }
  public PropertyHalService getPropertyHal() {
    return mPropertyHal;
  }

void set(VehiclePropValue propValue){
  mHalClient.setValue(propValue);
  setEventEnqueue(propValue);
}

packages/services/Car/service/src/com/android/car/hal/HalClient.java
// 同样 vehicle 实际为 VehicleService
HalClient(IVehicle vehicle, Looper looper, IVehicleCallback callback) {
  mVehicle = vehicle;
  Handler handler = new CallbackHandler(looper, callback);
  mInternalCallback = new VehicleCallback(handler);
}

public void setValue(VehiclePropValue propValue) {
  // 所以实际 VehicleService.set() 方法
  return mVehicle.set(propValue);
}

 7. HAL 层 "[email protected]"

hardware/interfaces/automotive/vehicle/2.0/types.hal
enum VehicleArea : int32_t {
    GLOBAL      = 0x01000000,
    /** WINDOW maps to enum VehicleAreaWindow */
    WINDOW      = 0x03000000,
    /** MIRROR maps to enum VehicleAreaMirror */
    MIRROR      = 0x04000000,
    /** SEAT maps to enum VehicleAreaSeat */
    SEAT        = 0x05000000,
    /** DOOR maps to enum VehicleAreaDoor */
    DOOR        = 0x06000000,
    /** WHEEL maps to enum VehicleAreaWheel */
    WHEEL       = 0x07000000,
    MASK        = 0x0f000000,
};
enum VehiclePropertyGroup : int32_t {
  SYSTEM      = 0x10000000,
  VENDOR      = 0x20000000,
  MASK        = 0xf0000000,
}
enum VehicleProperty : int32_t {
      INFO_VIN = (
      0x0100
      | VehiclePropertyGroup:SYSTEM
      | VehiclePropertyType:STRING
      | VehicleArea:GLOBAL),
}
struct VehiclePropValue {
  int64_t timestamp;
  int32_t areaId;
  int32_t prop;
  VehiclePropertyStatus status;
  RawValue value;
}

hardware/interfaces/automotive/vehicle/2.0/IVehicle.hal
package [email protected];
interface IVehicle {
  // 获取 Vehicle property 值
  get(VehiclePropValue requestedPropValue)
          generates (StatusCode status, VehiclePropValue propValue);
  // 设置 Vehicle property 值
  set(VehiclePropValue propValue) generates (StatusCode status);
}

8. VehicleService

hardware/interfaces/automotive/vehicle/2.0/default/VehicleService.cpp
int main(int /* argc */, char* /* argv */ []) {
  auto store = std::make_unique();
  auto hal = std::make_unique(store.get()); 
  
  // 以 EmulatedVehicleHal 为入参构造，新建线程以 SocketComm 封装，读取 socket 消息
  auto emulator = std::make_unique(hal.get());
  auto service = std::make_unique(hal.get());
  status_t status = service->registerAsService();
}
使用时，通过 IVehicle::getService()->xxx()使用

 9. VehicleHalManager -> EmulatedVehicleHal -> VehicleEmulator -> VehiclePropValue

hardware/interfaces/automotive/vehicle/2.0/default/common/include/vhal_v2_0/VehicleHalManager.h
class VehicleHalManager : public IVehicle {
  public:
    VehicleHalManager(VehicleHal* vehicleHal)
        : mHal(vehicleHal),
          mSubscriptionManager(std::bind(&VehicleHalManager::onAllClientsUnsubscribed,
          this, std::placeholders::_1)) {
        init();
    }
  private:
    VehicleHal* mHal;
}
hardware/interfaces/automotive/vehicle/2.0/default/common/src/VehicleHalManager.cpp
Return VehicleHalManager::set(const VehiclePropValue &value) {
  auto prop = value.prop;
  const auto* config = getPropConfigOrNull(prop);
  handlePropertySetEvent(value);
  
  // mHal 实际为 EmulatedVehicleHal
  auto status = mHal->set(value);
}

hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/EmulatedVehicleHal.cpp
EmulatedVehicleHal::EmulatedVehicleHal(VehiclePropertyStore* propStore)
  : mPropStore(propStore), /*实际为 VehiclePropertyStore */
  mHvacPowerProps(std::begin(kHvacPowerProperties), std::end(kHvacPowerProperties)),
  {}
  
StatusCode EmulatedVehicleHal::set(const VehiclePropValue& propValue) {
  auto currentPropValue = mPropStore->readValueOrNull(propValue);
  mPropStore->writeValue(propValue, shouldUpdateStatus)
  getEmulatorOrDie()->doSetValueFromClient(propValue);
}

hardware/interfaces/automotive/vehicle/2.0/default/common/src/VehiclePropertyStore.cpp
using PropertyMap = std::map;
PropertyMap mPropertyValues;
const VehiclePropValue* VehiclePropertyStore::getValueOrNullLocked(
      const VehiclePropertyStore::RecordId& recId) const  {
  auto it = mPropertyValues.find(recId);
  return it == mPropertyValues.end() ? nullptr : &it->second;
}
bool VehiclePropertyStore::writeValue(const VehiclePropValue& propValue,
    bool updateStatus) {
  RecordId recId = getRecordIdLocked(propValue);
  VehiclePropValue* valueToUpdate = const_cast(getValueOrNullLocked(recId));
  if (valueToUpdate == nullptr) {
    mPropertyValues.insert({ recId, propValue });
  } else {
    valueToUpdate->timestamp = propValue.timestamp;
    valueToUpdate->value = propValue.value;
    if (updateStatus) {
      valueToUpdate->status = propValue.status;
    }
  }
}

 10. VehicleEmulator

hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/VehicleEmulator.h
// VehicleService.cpp 中 auto emulator = std::make_unique(hal.get());
class VehicleEmulator {
public:
  VehicleEmulator(EmulatedVehicleHalIface* hal, std::unique_ptr comm = CommFactory::create())
  : mHal { hal }, mComm(comm.release()), 
  // mThread 线程，执行方法 rxThread
  mThread { &VehicleEmulator::rxThread, this}
  {
    // 所以 EmulatedVehicleHal -> registerEmulator(VehicleEmulator)
    // getEmulatorOrDie() 实际返回的也是 VehicleEmulator 对象
    mHal->registerEmulator(this);
  }
private:
  std::unique_ptr mComm;
  std::thread mThread;
}

class EmulatedVehicleHalIface : public VehicleHal {
public:
  void registerEmulator(VehicleEmulator* emulator) {
    mEmulator = emulator;
  }
protected:
  VehicleEmulator* getEmulatorOrDie() {
    return mEmulator;
  }
private:
  VehicleEmulator* mEmulator;
}

hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/SocketComm.cpp
static constexpr int DEBUG_SOCKET = 33452;//通信端口
int SocketComm::open() {
  mSockFd = socket(AF_INET, SOCK_STREAM, 0);
  memset(&servAddr, 0, sizeof(servAddr));
  servAddr.sin_family = AF_INET;
  servAddr.sin_addr.s_addr = INADDR_ANY;
  servAddr.sin_port = htons(DEBUG_SOCKET);
  bind(mSockFd, reinterpret_cast(&servAddr), sizeof(servAddr));
  listen(mSockFd, 1);
}
int SocketComm::connect() {
  // 接受客户端连接，后续用新的 socketFd 进行读写通信
  int cSockFd = accept(mSockFd, reinterpret_cast(&cliAddr), &cliLen);
  mCurSockFd = cSockFd;
}


hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/VehicleEmulator.cpp
std::unique_ptr CommFactory::create() {
  // 新建 socket 通信对象指针，用户tx/rx 读写消息
  return std::make_unique();
}

// 读取消息线程，在 VehicleService 启动并新建 VehicleEmulator 对象，该线程即启动
void VehicleEmulator::rxThread() {
  // 网络通信初始化，socket bind/listen
  int retVal = mComm->open();
  while (!mExit) {
    // 等待客户端新的连接请求
    retVal = mComm->connect();
    if (retVal >= 0) {
      rxMsg();//处理消息
    }
    std::this_thread::sleep_for(std::chrono::milliseconds(100));
  }
}
void VehicleEmulator::rxMsg() {
  while (!mExit) {
    std::vector msg = mComm->read();
    if (msg.size() > 0) {
      parseRxProtoBuf(msg);
    }
  }
}
void VehicleEmulator::parseRxProtoBuf(std::vector& msg) {
  emulator::EmulatorMessage rxMsg;
  emulator::EmulatorMessage respMsg;
  if (rxMsg.ParseFromArray(msg.data(), static_cast(msg.size()))) {
    switch (rxMsg.msg_type()) {
      case emulator::GET_PROPERTY_CMD:
        doGetProperty(rxMsg, respMsg);
        break;
      case emulator::SET_PROPERTY_CMD:
        doSetProperty(rxMsg, respMsg);
        break; 
    }
    txMsg(respMsg);
  }
}
void VehicleEmulator::txMsg(emulator::EmulatorMessage& txMsg) {
  int numBytes = txMsg.ByteSize();
  std::vector msg(static_cast(numBytes));
  int retVal = mComm->write(msg);
} 

void VehicleEmulator::doSetValueFromClient(const VehiclePropValue& propValue) {
  emulator::EmulatorMessage msg;
  emulator::VehiclePropValue *val = msg.add_value();
  populateProtoVehiclePropValue(val, &propValue);
  
  // 通过 socket 发送消息(状态，消息类型)
  msg.set_status(emulator::RESULT_OK);
  msg.set_msg_type(emulator::SET_PROPERTY_ASYNC);
  txMsg(msg);
}
void VehicleEmulator::populateProtoVehiclePropValue(emulator::VehiclePropValue* protoVal,
      const VehiclePropValue* val) {
  protoVal->set_prop(val->prop);
  protoVal->set_value_type(toInt(getPropType(val->prop)));
  protoVal->set_timestamp(val->timestamp);
  protoVal->set_status((emulator::VehiclePropStatus)(val->status));
  protoVal->set_area_id(val->areaId);
}

void VehicleEmulator::txMsg(emulator::EmulatorMessage& txMsg) {
  int numBytes = txMsg.ByteSize();
  std::vector msg(static_cast(numBytes));
  int retVal = mComm->write(msg);
}

  void VehicleEmulator::doGetProperty(VehicleEmulator::EmulatorMessage& rxMsg,
      VehicleEmulator::EmulatorMessage& respMsg)
  {
    emulator::VehiclePropGet getProp = rxMsg.prop(0);
    int32_t propId = getProp.prop();
    respMsg.set_msg_type(emulator::GET_PROPERTY_RESP);
    {
      VehiclePropValue request = { .prop = propId, .areaId = areaId };
      auto val = mHal->get(request, &halStatus);
      if (val != nullptr) {
        emulator::VehiclePropValue* protoVal = respMsg.add_value();
        populateProtoVehiclePropValue(protoVal, val.get());
      }
    }
    respMsg.set_status(status);
  }

11. 通过 proto 协议实现序列化及反序列化

hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.proto
syntax = "proto2";
package emulator; //会变成 namespace emulator {}
enum MsgType {}
message VehicleAreaConfig {}
message VehiclePropValue {}
message EmulatorMessage{}

编译生成代码：
out/soong/.intermediates/hardware/interfaces/automotive/vehicle/2.0/default/impl/
vhal_v2_0/proto/[email protected]/android_arm64_armv8-a_vendor_static/gen/proto/
hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.pb.h
namespace emulator {
class VehiclePropValue : public ::google::protobuf::MessageLite {
  ::google::protobuf::int32 prop_;
  ::google::protobuf::int32 value_type_;
  ::google::protobuf::int64 timestamp_;
  void set_prop(::google::protobuf::int32 value);
  void set_value_type(::google::protobuf::int32 value);
}

class EmulatorMessage : public ::google::protobuf::MessageLite {
 public:
  EmulatorMessage();
  const ::emulator::VehiclePropValue& value(int index) const;
  ::emulator::VehiclePropValue* add_value();
private:
  int msg_type_;
  int status_;
  ::google::protobuf::RepeatedPtrField< ::emulator::VehiclePropGet > prop_;
  ::google::protobuf::RepeatedPtrField< ::emulator::VehiclePropConfig > config_;
  ::google::protobuf::RepeatedPtrField< ::emulator::VehiclePropValue > value_;
}

class VehiclePropGet : public ::google::protobuf::MessageLite {
public:
  VehiclePropGet();
  ::google::protobuf::int32 prop() const;
  void set_prop(::google::protobuf::int32 value);
}
}

out/soong/intermediates/hardware/interfaces/automotive/vehicle/2.0/default/impl/
vhal_v2_0/proto/[email protected]/android_arm64_armv8-a_vendor_static/gen/proto/
hardware/interfaces/automotive/vehicle/2.0/default/impl/vhal_v2_0/proto/VehicleHalProto.pb.cc
  ::google::protobuf::int32 VehiclePropValue::prop() const {
    // @@protoc_insertion_point(field_get:emulator.VehiclePropValue.prop)
    return prop_;
  }
  void VehiclePropValue::set_prop(::google::protobuf::int32 value) {
    set_has_prop();
    prop_ = value;
    // @@protoc_insertion_point(field_set:emulator.VehiclePropValue.prop)
  }
  ::emulator::VehiclePropValue* EmulatorMessage::add_value() {
    // @@protoc_insertion_point(field_add:emulator.EmulatorMessage.value)
    return value_.Add();
  }

  ::google::protobuf::int32 VehiclePropGet::prop() const {
    // @@protoc_insertion_point(field_get:emulator.VehiclePropGet.prop)
    return prop_;
  }
  void VehiclePropGet::set_prop(::google::protobuf::int32 value) {
    set_has_prop();
    prop_ = value;
    // @@protoc_insertion_point(field_set:emulator.VehiclePropGet.prop)
  }
  
  const ::google::protobuf::RepeatedPtrField< ::emulator::VehiclePropGet >&
  EmulatorMessage::prop() const {
    // @@protoc_insertion_point(field_list:emulator.EmulatorMessage.prop)
    return prop_;
  }