1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dexfuzz; 18 19 import dexfuzz.listeners.BaseListener; 20 21 /** 22 * For timing splits of program execution. 23 */ 24 public class Timer { 25 /** 26 * The name of the timer, the phase of the program it is intended to time. 27 */ 28 private String name; 29 30 /** 31 * A point in time remembered when start() is called. 32 */ 33 private long startPoint; 34 35 /** 36 * A cumulative count of how much time has elapsed. Updated each time 37 * stop() is called. 38 */ 39 private long elapsedTime; 40 41 /** 42 * Initialise a new timer with the provided name. 43 */ Timer(String name)44 public Timer(String name) { 45 this.name = name; 46 this.elapsedTime = 0L; 47 } 48 49 /** 50 * Start timing. 51 */ start()52 public void start() { 53 startPoint = System.currentTimeMillis(); 54 } 55 56 /** 57 * Stop timing, update how much time has elapsed. 58 */ stop()59 public void stop() { 60 long endPoint = System.currentTimeMillis(); 61 elapsedTime += (endPoint - startPoint); 62 } 63 64 /** 65 * Log the elapsed time this timer has recorded. 66 */ printTime(BaseListener listener)67 public void printTime(BaseListener listener) { 68 listener.handleTiming(name, ((float)elapsedTime) / 1000.0f); 69 } 70 } 71