18d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn/* 28d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * Copyright (C) 2013 The Android Open Source Project 38d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * 48d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * Licensed under the Apache License, Version 2.0 (the "License"); 58d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * you may not use this file except in compliance with the License. 68d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * You may obtain a copy of the License at 78d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * 88d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * http://www.apache.org/licenses/LICENSE-2.0 98d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * 108d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * Unless required by applicable law or agreed to in writing, software 118d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * distributed under the License is distributed on an "AS IS" BASIS, 128d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * See the License for the specific language governing permissions and 148d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * limitations under the License. 158d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn */ 168d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 178d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackbornpackage com.android.server; 188d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 198d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackbornimport android.os.Handler; 209957151661b8ae65da45a1fb72df5b66176302cbMakoto Onukiimport android.os.Looper; 214074ad01e898605c64a80a8cb14c10bdbedf1bdbTim Murrayimport android.os.Process; 2274cd3de6f4889d54a3da930de5e7ad00b97f03e9Jeff Sharkeyimport android.os.Trace; 238d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 248d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn/** 258d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * Shared singleton thread for showing UI. This is a foreground thread, and in 268d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * additional should not have operations that can take more than a few ms scheduled 278d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn * on it to avoid UI jank. 288d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn */ 294ccb823a9f62e57f9d221f83a97e82967e79a9e5Jeff Brownpublic final class UiThread extends ServiceThread { 309957151661b8ae65da45a1fb72df5b66176302cbMakoto Onuki private static final long SLOW_DISPATCH_THRESHOLD_MS = 100; 31712886fd979f58b0de7cefc3bce885ad7f4493b6Makoto Onuki private static final long SLOW_DELIVERY_THRESHOLD_MS = 200; 328d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn private static UiThread sInstance; 338d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn private static Handler sHandler; 348d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 358d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn private UiThread() { 364074ad01e898605c64a80a8cb14c10bdbedf1bdbTim Murray super("android.ui", Process.THREAD_PRIORITY_FOREGROUND, false /*allowIo*/); 37be7878db546e160906d34ca1cd7d518df166f80bMakoto Onuki } 38be7878db546e160906d34ca1cd7d518df166f80bMakoto Onuki 39be7878db546e160906d34ca1cd7d518df166f80bMakoto Onuki @Override 40be7878db546e160906d34ca1cd7d518df166f80bMakoto Onuki public void run() { 414074ad01e898605c64a80a8cb14c10bdbedf1bdbTim Murray // Make sure UiThread is in the fg stune boost group 424074ad01e898605c64a80a8cb14c10bdbedf1bdbTim Murray Process.setThreadGroup(Process.myTid(), Process.THREAD_GROUP_TOP_APP); 43be7878db546e160906d34ca1cd7d518df166f80bMakoto Onuki super.run(); 448d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 458d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 468d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn private static void ensureThreadLocked() { 478d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn if (sInstance == null) { 488d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn sInstance = new UiThread(); 498d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn sInstance.start(); 509957151661b8ae65da45a1fb72df5b66176302cbMakoto Onuki final Looper looper = sInstance.getLooper(); 51daf72b1bd190eb9df405347419c19a98b58bb89cMichael Wright looper.setTraceTag(Trace.TRACE_TAG_SYSTEM_SERVER); 52712886fd979f58b0de7cefc3bce885ad7f4493b6Makoto Onuki looper.setSlowLogThresholdMs( 53712886fd979f58b0de7cefc3bce885ad7f4493b6Makoto Onuki SLOW_DISPATCH_THRESHOLD_MS, SLOW_DELIVERY_THRESHOLD_MS); 548d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn sHandler = new Handler(sInstance.getLooper()); 558d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 568d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 578d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 588d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn public static UiThread get() { 598d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn synchronized (UiThread.class) { 608d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn ensureThreadLocked(); 618d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn return sInstance; 628d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 638d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 648d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn 658d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn public static Handler getHandler() { 668d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn synchronized (UiThread.class) { 678d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn ensureThreadLocked(); 688d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn return sHandler; 698d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 708d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn } 718d044e8bc287c1a567d82aedbe30085b011544c3Dianne Hackborn} 72