Mercurial > hg > truffle

annotate visualizer/HierarchicalLayout/src/com/sun/hotspot/igv/hierarchicallayout/Timing.java @ 7291:a748e4d44694

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Truffle API to specify type-specalized Node classes; annotation processor for automatic code generation of the type-specialized Node classes during the build process
author Christian Humer <christian.humer@gmail.com>
date Fri, 21 Dec 2012 10:44:31 -0800
parents 015fb895586b
children
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1 /*
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24 package com.sun.hotspot.igv.hierarchicallayout;
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25
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26 /**
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27 *
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28 * @author Thomas Wuerthinger
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29 */
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30 public class Timing {
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31
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32 private long lastValue;
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33 private long sum;
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34 private String name;
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35
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36 public Timing(String name) {
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37 this.name = name;
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38 }
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39
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40 @Override
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41 public String toString() {
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42 long val = sum;
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43 if (lastValue != 0) {
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44 // Timer running
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45 long newValue = System.nanoTime();
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46 val += (newValue - lastValue);
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47 }
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48 return "Timing for " + name + " is: " + val / 1000000 + " ms";
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49 }
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50
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51 public void print() {
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52 System.out.println(toString());
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53 }
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54
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55 public void start() {
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56 lastValue = System.nanoTime();
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57 }
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58
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59 public void stop() {
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60 if (lastValue == 0) {
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61 throw new IllegalStateException("You must call start before stop");
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62 }
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63 long newValue = System.nanoTime();
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64 sum += newValue - lastValue;
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65 lastValue = 0;
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66 }
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67 }