content: /*
   * Copyright (C) 2011 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 android.filterfw.core;
  
  import android.os.SystemClock;
  import android.util.Log;
  import java.util.HashMap;
  
  /**
   * @hide
   */
  class StopWatch {
  
      private int STOP_WATCH_LOGGING_PERIOD = 200;
      private String TAG = "MFF";
  
      private String mName;
      private long mStartTime;
      private long mTotalTime;
      private int mNumCalls;
  
      public StopWatch(String name) {
          mName = name;
          mStartTime = -1;
          mTotalTime = 0;
          mNumCalls = 0;
      }
  
      public void start() {
          if (mStartTime != -1) {
               throw new RuntimeException(
                   "Calling start with StopWatch already running");
          }
          mStartTime = SystemClock.elapsedRealtime();
      }
  
      public void stop() {
          if (mStartTime == -1) {
               throw new RuntimeException(
                   "Calling stop with StopWatch already stopped");
          }
          long stopTime = SystemClock.elapsedRealtime();
          mTotalTime += stopTime - mStartTime;
          ++mNumCalls;
          mStartTime = -1;
          if (mNumCalls % STOP_WATCH_LOGGING_PERIOD == 0) {
              Log.i(TAG, "AVG ms/call " + mName + ": " +
                    String.format("%.1f", mTotalTime * 1.0f / mNumCalls));
              mTotalTime = 0;
              mNumCalls = 0;
          }
      }
  
  }
  
  public class StopWatchMap {
  
      public boolean LOG_MFF_RUNNING_TIMES = false;
  
      private HashMap<String, StopWatch> mStopWatches = null;
  
      public StopWatchMap() {
          mStopWatches = new HashMap<String, StopWatch>();
      }
  
      public void start(String stopWatchName) {
          if (!LOG_MFF_RUNNING_TIMES) {
              return;
          }
          if (!mStopWatches.containsKey(stopWatchName)) {
              mStopWatches.put(stopWatchName, new StopWatch(stopWatchName));
          }
          mStopWatches.get(stopWatchName).start();
      }
  
      public void stop(String stopWatchName) {
          if (!LOG_MFF_RUNNING_TIMES) {
              return;
          }
          if (!mStopWatches.containsKey(stopWatchName)) {
              throw new RuntimeException(
                  "Calling stop with unknown stopWatchName: " + stopWatchName);
          }
          mStopWatches.get(stopWatchName).stop();
      }
  
  }
  