Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/Interval.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.utilities; | |
| 26 | |
| 27 /** An interval is an immutable data structure defined by its two | |
| 28 endpoints. */ | |
| 29 | |
| 30 import java.util.Comparator; | |
| 31 | |
| 32 public class Interval { | |
| 33 private Object lowEndpoint; | |
| 34 private Object highEndpoint; | |
| 35 | |
| 36 /** It is required that the low endpoint be less than or equal to | |
| 37 the high endpoint according to the Comparator which will be | |
| 38 passed into the overlaps() routines. */ | |
| 39 public Interval(Object lowEndpoint, Object highEndpoint) { | |
| 40 this.lowEndpoint = lowEndpoint; | |
| 41 this.highEndpoint = highEndpoint; | |
| 42 } | |
| 43 | |
| 44 public Object getLowEndpoint() { | |
| 45 return lowEndpoint; | |
| 46 } | |
| 47 | |
| 48 public Object getHighEndpoint() { | |
| 49 return highEndpoint; | |
| 50 } | |
| 51 | |
| 52 /** This takes the Interval to compare against as well as a | |
| 53 Comparator which will be applied to the low and high endpoints | |
| 54 of the given intervals. */ | |
| 55 public boolean overlaps(Interval arg, Comparator endpointComparator) { | |
| 56 return overlaps(arg.getLowEndpoint(), arg.getHighEndpoint(), endpointComparator); | |
| 57 } | |
| 58 | |
| 59 /** Routine which can be used instead of the one taking an interval, | |
| 60 for the situation where the endpoints are being retrieved from | |
| 61 different data structures */ | |
| 62 public boolean overlaps(Object otherLowEndpoint, | |
| 63 Object otherHighEndpoint, | |
| 64 Comparator endpointComparator) { | |
| 65 if (endpointComparator.compare(highEndpoint, otherLowEndpoint) <= 0) { | |
| 66 return false; | |
| 67 } | |
| 68 if (endpointComparator.compare(lowEndpoint, otherHighEndpoint) >= 0) { | |
| 69 return false; | |
| 70 } | |
| 71 return true; | |
| 72 } | |
| 73 | |
| 74 public String toString() { | |
| 75 return "[ " + getLowEndpoint().toString() + ", " + getHighEndpoint().toString() + ")"; | |
| 76 } | |
| 77 } |