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annotate graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/DebugTimer.java @ 21788:c1610658bba0
fixed regression causing mx not to install jars into $(SHARED_DIR)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 08 Jun 2015 20:24:05 +0200 |
parents | b1530a6cce8c |
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More work on debug framework.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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1 /* |
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2 * Copyright (c) 2012, 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 package com.oracle.jvmci.debug; |
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24 |
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25 import java.util.concurrent.*; |
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26 |
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27 /** |
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28 * A timer for some activity of interest. A timer should be deployed using the try-with-resources |
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29 * pattern: |
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30 * |
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31 * <pre> |
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32 * try (TimerCloseable a = timer.start()) { |
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33 * // the code to time |
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34 * } |
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35 * </pre> |
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36 */ |
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37 public interface DebugTimer { |
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38 |
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39 /** |
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40 * Starts this timer if timing is {@linkplain Debug#isTimeEnabled() enabled} or this is an |
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41 * {@linkplain #isConditional() unconditional} timer. |
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42 * |
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43 * @return an object that must be closed once the activity has completed to add the elapsed time |
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44 * since this call to the total for this timer |
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45 */ |
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46 DebugCloseable start(); |
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47 |
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48 /** |
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49 * Sets a flag determining if this timer is only enabled if timing is |
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50 * {@link Debug#isTimeEnabled() enabled}. |
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51 */ |
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52 void setConditional(boolean flag); |
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53 |
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54 /** |
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55 * Determines if this timer is only enabled if timing is {@link Debug#isTimeEnabled() enabled}. |
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56 */ |
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57 boolean isConditional(); |
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58 |
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59 /** |
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60 * Gets the current value of this timer. |
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61 */ |
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62 long getCurrentValue(); |
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63 |
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64 /** |
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65 * Gets the time unit of this timer. |
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66 */ |
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67 TimeUnit getTimeUnit(); |
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68 |
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69 /** |
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70 * Gets the timer recording the amount time spent within a timed scope minus the time spent in |
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71 * any nested timed scopes. |
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72 * |
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73 * @return null if this timer does not support flat timing |
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74 */ |
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75 default DebugTimer getFlat() { |
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76 return null; |
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77 } |
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78 } |