Sunny Goyal
10759887c2
HandlerThread.getLooper blocks the current thread until. the final thread is initialized. Updating RecentsModel to use an executor instead of a handler thread to avoid this. Change-Id: I3b2e82a375ea65bea1526af4a32c6a2488102541
114 lines
3.9 KiB
Java
114 lines
3.9 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.util;
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import android.os.HandlerThread;
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import android.os.Looper;
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import android.os.Process;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.ThreadFactory;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicInteger;
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/**
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* Various different executors used in Launcher
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*/
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public class Executors {
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// These values are same as that in {@link AsyncTask}.
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private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
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private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
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private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
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private static final int KEEP_ALIVE = 1;
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/**
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* An {@link ThreadPoolExecutor} to be used with async task with no limit on the queue size.
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*/
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public static final ThreadPoolExecutor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
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CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
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TimeUnit.SECONDS, new LinkedBlockingQueue<>());
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/**
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* Returns the executor for running tasks on the main thread.
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*/
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public static final LooperExecutor MAIN_EXECUTOR =
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new LooperExecutor(Looper.getMainLooper());
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/**
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* A background executor for using time sensitive actions where user is waiting for response.
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*/
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public static final LooperExecutor UI_HELPER_EXECUTOR =
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new LooperExecutor(createAndStartNewForegroundLooper("UiThreadHelper"));
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/**
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* Utility method to get a started handler thread statically
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*/
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public static Looper createAndStartNewLooper(String name) {
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return createAndStartNewLooper(name, Process.THREAD_PRIORITY_DEFAULT);
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}
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/**
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* Utility method to get a started handler thread statically with the provided priority
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*/
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public static Looper createAndStartNewLooper(String name, int priority) {
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HandlerThread thread = new HandlerThread(name, priority);
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thread.start();
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return thread.getLooper();
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}
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/**
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* Similar to {@link #createAndStartNewLooper(String)}, but starts the thread with
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* foreground priority.
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* Think before using
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*/
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public static Looper createAndStartNewForegroundLooper(String name) {
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return createAndStartNewLooper(name, Process.THREAD_PRIORITY_FOREGROUND);
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}
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/**
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* Executor used for running Launcher model related tasks (eg loading icons or updated db)
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*/
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public static final LooperExecutor MODEL_EXECUTOR =
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new LooperExecutor(createAndStartNewLooper("launcher-loader"));
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/**
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* A simple ThreadFactory to set the thread name and priority when used with executors.
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*/
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public static class SimpleThreadFactory implements ThreadFactory {
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private final int mPriority;
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private final String mNamePrefix;
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private final AtomicInteger mCount = new AtomicInteger(0);
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public SimpleThreadFactory(String namePrefix, int priority) {
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mNamePrefix = namePrefix;
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mPriority = priority;
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}
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@Override
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public Thread newThread(Runnable runnable) {
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Thread t = new Thread(() -> {
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Process.setThreadPriority(mPriority);
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runnable.run();
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}, mNamePrefix + mCount.incrementAndGet());
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return t;
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}
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}
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}
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