| /* |
| * 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.HandlerThread; |
| |
| /** |
| * 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 final Handler mHandler; |
| private final HandlerThread mHandlerThread; |
| |
| interface Task { |
| void cancel(); |
| } |
| |
| UptimeTimer(String threadName) { |
| mHandlerThread = new HandlerThread(threadName); |
| mHandlerThread.start(); |
| // Blocks until looper init |
| mHandler = new Handler(mHandlerThread.getLooper()); |
| } |
| |
| // Note, this method is not internally synchronized. |
| // This is safe since Handlers are internally synchronized. |
| Task createTask(@NonNull Runnable runnable, long uptimeMs) { |
| Object token = new Object(); |
| TaskImpl task = new TaskImpl(mHandler, token); |
| mHandler.postDelayed(runnable, token, uptimeMs); |
| return task; |
| } |
| |
| void quit() { |
| mHandlerThread.quitSafely(); |
| } |
| |
| private static class TaskImpl implements Task { |
| private final Handler mHandler; |
| private final Object mToken; |
| |
| public TaskImpl(Handler handler, Object token) { |
| mHandler = handler; |
| mToken = token; |
| } |
| |
| @Override |
| public void cancel() { |
| mHandler.removeCallbacksAndMessages(mToken); |
| } |
| }; |
| } |