content: /*
   * Copyright (C) 2017 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.launcher3.util;
  
  import static android.util.Log.VERBOSE;
  import static android.util.Log.isLoggable;
  
  import android.os.SystemClock;
  import android.os.Trace;
  import android.util.ArrayMap;
  import android.util.Log;
  import android.util.MutableLong;
  
  import com.android.launcher3.config.FeatureFlags;
  
  /**
   * A wrapper around {@link Trace} with some utility information.
   *
   * To enable any tracing log, execute the following command:
   * $ adb shell setprop log.tag.LAUNCHER_TRACE VERBOSE
   * $ adb shell setprop log.tag.TAGNAME VERBOSE
   */
  public class TraceHelper {
  
      private static final boolean ENABLED = isLoggable("LAUNCHER_TRACE", VERBOSE);
  
      private static final boolean SYSTEM_TRACE = ENABLED;
      private static final ArrayMap<String, MutableLong> sUpTimes = ENABLED ? new ArrayMap<>() : null;
  
      public static void beginSection(String sectionName) {
          if (ENABLED) {
              synchronized (sUpTimes) {
                  MutableLong time = sUpTimes.get(sectionName);
                  if (time == null) {
                      time = new MutableLong(isLoggable(sectionName, VERBOSE) ? 0 : -1);
                      sUpTimes.put(sectionName, time);
                  }
                  if (time.value >= 0) {
                      if (SYSTEM_TRACE) {
                          Trace.beginSection(sectionName);
                      }
                      time.value = SystemClock.uptimeMillis();
                  }
              }
          }
      }
  
      public static void partitionSection(String sectionName, String partition) {
          if (ENABLED) {
              synchronized (sUpTimes) {
                  MutableLong time = sUpTimes.get(sectionName);
                  if (time != null && time.value >= 0) {
  
                      if (SYSTEM_TRACE) {
                          Trace.endSection();
                          Trace.beginSection(sectionName);
                      }
  
                      long now = SystemClock.uptimeMillis();
                      Log.d(sectionName, partition + " : " + (now - time.value));
                      time.value = now;
                  }
              }
          }
      }
  
      public static void endSection(String sectionName) {
          if (ENABLED) {
              endSection(sectionName, "End");
          }
      }
  
      public static void endSection(String sectionName, String msg) {
          if (ENABLED) {
              synchronized (sUpTimes) {
                  MutableLong time = sUpTimes.get(sectionName);
                  if (time != null && time.value >= 0) {
                      if (SYSTEM_TRACE) {
                          Trace.endSection();
                      }
                      Log.d(sectionName, msg + " : " + (SystemClock.uptimeMillis() - time.value));
                  }
              }
          }
      }
  }
  