1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.os; 17 18 import android.annotation.NonNull; 19 import android.annotation.Nullable; 20 import android.annotation.SystemApi; 21 22 /** 23 * Provides a way to register and obtain the system service binder objects managed by the ART 24 * mainline module. 25 * 26 * Only the ART mainline module will be able to access an instance of this class. 27 * 28 * @hide 29 */ 30 @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES) 31 public class ArtModuleServiceManager { 32 /** @hide */ ArtModuleServiceManager()33 public ArtModuleServiceManager() {} 34 35 /** A class that exposes the method to obtain each system service. */ 36 public static final class ServiceRegisterer { 37 @NonNull private final String mServiceName; 38 39 /** @hide */ ServiceRegisterer(@onNull String serviceName)40 public ServiceRegisterer(@NonNull String serviceName) { 41 mServiceName = serviceName; 42 } 43 44 /** 45 * Returns the service from the service manager. 46 * 47 * If the service is not running, servicemanager will attempt to start it, and this function 48 * will wait for it to be ready. 49 * 50 * @return {@code null} only if there are permission problems or fatal errors. 51 */ 52 @Nullable waitForService()53 public IBinder waitForService() { 54 return ServiceManager.waitForService(mServiceName); 55 } 56 } 57 58 /** Returns {@link ServiceRegisterer} for the "artd" service. */ 59 @NonNull getArtdServiceRegisterer()60 public ServiceRegisterer getArtdServiceRegisterer() { 61 return new ServiceRegisterer("artd"); 62 } 63 } 64