1 /*
2  * Copyright (C) 2023 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 
17 package com.android.server;
18 
19 import android.annotation.RequiresApi;
20 import android.os.IBinder;
21 import android.os.Build;
22 import android.os.ServiceManager;
23 
24 /** Provides a way to access {@link ServiceManager#waitForService} API. */
25 @RequiresApi(Build.VERSION_CODES.S)
26 public final class ServiceManagerWrapper {
27     static {
28         System.loadLibrary("service-connectivity");
29     }
30 
ServiceManagerWrapper()31     private ServiceManagerWrapper() {}
32 
33     /**
34      * Returns the specified service from the service manager.
35      *
36      * If the service is not running, service manager will attempt to start it, and this function
37      * will wait for it to be ready.
38      *
39      * @return {@code null} only if there are permission problems or fatal errors
40      */
waitForService(String serviceName)41     public static IBinder waitForService(String serviceName) {
42         return nativeWaitForService(serviceName);
43     }
44 
nativeWaitForService(String serviceName)45     private static native IBinder nativeWaitForService(String serviceName);
46 }
47