Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/observer/ObservableCompiler.java @ 2653:7c8ad40c1f88
No need for stateAfter on volatile field loads.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 15:11:33 +0200 |
parents | 16b9a8b5ad39 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 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.sun.c1x.observer; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.sun.c1x.debug.*; |
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28 |
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29 /** |
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30 * Base class for compilers that notify subscribed {@link CompilationObserver CompilationObservers} of |
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31 * {@link CompilationEvent CompilationEvents} that occur during their compilations. |
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32 * |
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33 * @author Peter Hofer |
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34 */ |
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35 public class ObservableCompiler { |
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36 |
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37 private List<CompilationObserver> observers; |
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38 |
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39 /** |
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40 * @return {@code true} if one or more observers are subscribed to receive notifications from this compiler, |
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41 * {@code false} otherwise. |
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42 */ |
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43 public boolean isObserved() { |
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44 return observers != null && !TTY.isSuppressed(); |
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45 } |
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46 |
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47 /** |
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48 * Add the specified observer to receive events from this compiler. |
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49 * |
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50 * @param observer The observer to add. |
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51 */ |
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52 public void addCompilationObserver(CompilationObserver observer) { |
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53 assert observer != null; |
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54 |
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55 if (observers == null) { |
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56 observers = new LinkedList<CompilationObserver>(); |
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57 } |
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58 observers.add(observer); |
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59 } |
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60 |
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61 public void fireCompilationStarted(CompilationEvent event) { |
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62 if (isObserved()) { |
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63 for (CompilationObserver observer : observers) { |
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64 observer.compilationStarted(event); |
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65 } |
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66 } |
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67 } |
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68 |
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69 public void fireCompilationEvent(CompilationEvent event) { |
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70 if (isObserved()) { |
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71 for (CompilationObserver observer : observers) { |
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72 observer.compilationEvent(event); |
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73 } |
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74 } |
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75 } |
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76 |
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77 public void fireCompilationFinished(CompilationEvent event) { |
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78 if (isObserved()) { |
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79 for (CompilationObserver observer : observers) { |
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80 observer.compilationFinished(event); |
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81 } |
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82 } |
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83 } |
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84 |
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85 /** |
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86 * Remove the specified observer so that it no longer receives events from this compiler. |
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87 * |
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88 * @param observer The observer to remove. |
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89 */ |
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90 public void removeCompilationObserver(CompilationObserver observer) { |
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91 if (observers != null) { |
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92 observers.remove(observer); |
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93 if (observers.size() == 0) { |
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94 observers = null; |
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95 } |
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96 } |
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97 } |
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98 |
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99 } |