Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/vm/Allocation.java @ 34:49be04cc6389 default tip java9-try
cyclic dependency ...
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Tue, 19 Dec 2017 11:21:23 +0900 |
parents | 61d41facf527 |
children |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is licensed under the * Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package gov.nasa.jpf.vm; import gov.nasa.jpf.util.OATHash; /** * helper class for search global object id (SGOID) computation. This * captures both allocation context and count. * * NOTE: this is used as a key for associative arrays, but we do * allow destructive updates via init() in order to enable key * caching for lookups that don't lead to new entries. * THE CALLER HAS TO MAKE SURE init() IS NEVER CALLED ON A STORED KEY !! */ public class Allocation { final AllocationContext context; final int count; final int hash; public Allocation (AllocationContext context, int count){ this.context = context; this.count = count; this.hash = OATHash.hash(context.hashCode(), count); } @Override public boolean equals (Object o) { if (o instanceof Allocation) { Allocation other = (Allocation)o; if (other.hash == hash) { if (other.context.equals(context)) { return true; } } } return false; } @Override public int hashCode() { return hash; } }