1e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos/* 2e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * Copyright (C) 2017 The Android Open Source Project 3e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * 4e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * Licensed under the Apache License, Version 2.0 (the "License"); 5e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * you may not use this file except in compliance with the License. 6e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * You may obtain a copy of the License at 7e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * 8e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * http://www.apache.org/licenses/LICENSE-2.0 9e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * 10e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * Unless required by applicable law or agreed to in writing, software 11e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * distributed under the License is distributed on an "AS IS" BASIS, 12e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * See the License for the specific language governing permissions and 14e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * limitations under the License 15e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos */ 16e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 17e1e0b483be87d23383832aa6b558364a730c690fAdrian Roospackage com.android.systemui.util.leak; 18e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 19e1e0b483be87d23383832aa6b558364a730c690fAdrian Roosimport android.os.SystemClock; 20e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 21e1e0b483be87d23383832aa6b558364a730c690fAdrian Roosimport java.lang.ref.Reference; 22e1e0b483be87d23383832aa6b558364a730c690fAdrian Roosimport java.lang.ref.ReferenceQueue; 23e1e0b483be87d23383832aa6b558364a730c690fAdrian Roosimport java.lang.ref.WeakReference; 24e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 25e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos/** 26e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos * Utilities for writing tests that manipulate weak or other references. 27e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos */ 28e1e0b483be87d23383832aa6b558364a730c690fAdrian Roospublic class ReferenceTestUtils { 29e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 30e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos /** Returns a runnable that blocks until {@code o} has been collected. */ 31e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos public static CollectionWaiter createCollectionWaiter(Object o) { 32e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos ReferenceQueue<Object> q = new ReferenceQueue<>(); 33e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos Reference<?> ref = new WeakReference<>(o, q); 34e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos o = null; // Ensure this variable can't be referenced from the lambda. 35e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 36e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos return () -> { 37e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos Runtime.getRuntime().gc(); 38e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos while (true) { 39e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos try { 40e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos if (q.remove(5_000) == ref) { 41e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos return; 42e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } else { 43e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos throw new RuntimeException("timeout while waiting for object collection"); 44e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 45e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } catch (InterruptedException e) { 46e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos Thread.currentThread().interrupt(); 47e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 48e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 49e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos }; 50e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 51e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 52e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos public static void waitForCondition(Condition p) { 53e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos long deadline = SystemClock.uptimeMillis() + 5_000; 54e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos while (!p.apply()) { 55e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos if (SystemClock.uptimeMillis() > deadline) { 56e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos throw new RuntimeException("timeout while waiting for condition"); 57e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 58e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos SystemClock.sleep(100); 59e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 60e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 61e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 62e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos public interface Condition { 63e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos boolean apply(); 64e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 65e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos 66e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos public interface CollectionWaiter { 67e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos void waitForCollection(); 68e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos } 69e1e0b483be87d23383832aa6b558364a730c690fAdrian Roos} 70