Mercurial > hg > truffle
view src/share/vm/oops/instanceOop.hpp @ 4898:d851f3714641
Merge
author | dholmes |
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date | Wed, 25 Jan 2012 19:26:35 -0500 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 1997, 2010, 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_OOPS_INSTANCEOOP_HPP #define SHARE_VM_OOPS_INSTANCEOOP_HPP #include "oops/oop.hpp" // An instanceOop is an instance of a Java Class // Evaluating "new HashTable()" will create an instanceOop. class instanceOopDesc : public oopDesc { public: // aligned header size. static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; } // If compressed, the offset of the fields of the instance may not be aligned. static int base_offset_in_bytes() { return UseCompressedOops ? klass_gap_offset_in_bytes() : sizeof(instanceOopDesc); } static bool contains_field_offset(int offset, int nonstatic_field_size) { int base_in_bytes = base_offset_in_bytes(); return (offset >= base_in_bytes && (offset-base_in_bytes) < nonstatic_field_size * heapOopSize); } }; #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP