| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.base.task; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * Implementation of the abstract class {@link SequencedTaskRunner}. Uses AsyncTasks until |
| * native APIs are available. |
| */ |
| public class SequencedTaskRunnerImpl extends TaskRunnerImpl implements SequencedTaskRunner { |
| private AtomicInteger mPendingTasks = new AtomicInteger(); |
| |
| /** |
| * @param traits The TaskTraits associated with this SequencedTaskRunnerImpl. |
| */ |
| SequencedTaskRunnerImpl(TaskTraits traits) { |
| super(traits, "SequencedTaskRunnerImpl"); |
| } |
| |
| @Override |
| protected void schedulePreNativeTask() { |
| if (mPendingTasks.getAndIncrement() == 0) { |
| super.schedulePreNativeTask(); |
| } |
| } |
| |
| @Override |
| protected void runPreNativeTask() { |
| super.runPreNativeTask(); |
| if (mPendingTasks.decrementAndGet() > 0) { |
| super.schedulePreNativeTask(); |
| } |
| } |
| } |