| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.soundtrigger_middleware; |
| |
| import android.annotation.NonNull; |
| import android.os.Handler; |
| import android.os.Looper; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| /** |
| * A simple timer, similar to java.util.Timer, but using the "uptime clock". |
| * |
| * Example usage: |
| * UptimeTimer timer = new UptimeTimer("TimerThread"); |
| * UptimeTimer.Task task = timer.createTask(() -> { ... }, 100); |
| * ... |
| * // optionally, some time later: |
| * task.cancel(); |
| */ |
| class UptimeTimer { |
| private Handler mHandler = null; |
| |
| interface Task { |
| void cancel(); |
| } |
| |
| UptimeTimer(String threadName) { |
| new Thread(this::threadFunc, threadName).start(); |
| synchronized (this) { |
| while (mHandler == null) { |
| try { |
| wait(); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |
| |
| Task createTask(@NonNull Runnable runnable, long uptimeMs) { |
| TaskImpl task = new TaskImpl(runnable); |
| mHandler.postDelayed(task, uptimeMs); |
| return task; |
| } |
| |
| private void threadFunc() { |
| Looper.prepare(); |
| synchronized (this) { |
| mHandler = new Handler(Looper.myLooper()); |
| notifyAll(); |
| } |
| Looper.loop(); |
| } |
| |
| private static class TaskImpl implements Task, Runnable { |
| private AtomicReference<Runnable> mRunnable = new AtomicReference<>(); |
| |
| TaskImpl(@NonNull Runnable runnable) { |
| mRunnable.set(runnable); |
| } |
| |
| @Override |
| public void cancel() { |
| mRunnable.set(null); |
| } |
| |
| @Override |
| public void run() { |
| Runnable runnable = mRunnable.get(); |
| if (runnable != null) { |
| runnable.run(); |
| } |
| } |
| } |
| } |