1 /* 2 * Copyright (C) 2025 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 android.os 18 19 import com.android.launcher3.util.Executors.MAIN_EXECUTOR 20 import com.android.launcher3.util.WeakCleanupSet 21 import com.android.launcher3.util.WeakCleanupSet.OnOwnerDestroyedCallback 22 23 /** Utility methods related to Binder */ 24 object BinderUtils { 25 26 /** Creates a binder wrapper which is tied to the [lifecycle] */ 27 @JvmStatic wrapLifecyclenull28 fun <T : Binder> T.wrapLifecycle(cleanupSet: WeakCleanupSet): Binder = 29 LifecycleBinderWrapper(this, cleanupSet) 30 31 private class LifecycleBinderWrapper<T : Binder>( 32 private var realBinder: T?, 33 cleanupSet: WeakCleanupSet, 34 ) : Binder(realBinder?.interfaceDescriptor), OnOwnerDestroyedCallback { 35 36 init { 37 MAIN_EXECUTOR.execute { cleanupSet.addOnOwnerDestroyedCallback(this) } 38 } 39 40 override fun queryLocalInterface(descriptor: String): IInterface? = 41 realBinder?.queryLocalInterface(descriptor) 42 43 override fun onTransact(code: Int, data: Parcel, reply: Parcel?, flags: Int): Boolean = 44 realBinder?.transact(code, data, reply, flags) 45 ?: throw RemoteException("Original binder cleaned up") 46 47 override fun onOwnerDestroyed() { 48 realBinder = null 49 } 50 } 51 } 52