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view src/share/vm/classfile/altHashing.hpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author | sla |
---|---|
date | Mon, 10 Jun 2013 11:30:51 +0200 |
parents | e9140bf80b4a |
children | cd6b3f1a94ff |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_CLASSFILE_ALTHASHING_HPP #define SHARE_VM_CLASSFILE_ALTHASHING_HPP #include "prims/jni.h" #include "classfile/symbolTable.hpp" /** * Hashing utilities. * * Implementation of Murmur3 hashing. * This code was translated from src/share/classes/sun/misc/Hashing.java * code in the JDK. */ class AltHashing : AllStatic { // utility function copied from java/lang/Integer static jint Integer_rotateLeft(jint i, int distance) { return (i << distance) | (((juint)i) >> (32-distance)); } static jint murmur3_32(const int* data, int len); static jint murmur3_32(jint seed, const int* data, int len); #ifndef PRODUCT // Hashing functions used for internal testing static jint murmur3_32(const jbyte* data, int len); static jint murmur3_32(const jchar* data, int len); static void testMurmur3_32_ByteArray(); static void testEquivalentHashes(); #endif // PRODUCT public: static jint compute_seed(); static jint murmur3_32(jint seed, const jbyte* data, int len); static jint murmur3_32(jint seed, const jchar* data, int len); NOT_PRODUCT(static void test_alt_hash();) }; #endif // SHARE_VM_CLASSFILE_ALTHASHING_HPP