1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OOPS_KLASSOOP_HPP 26 #define SHARE_VM_OOPS_KLASSOOP_HPP 27 28 #include "oops/oop.hpp" 29 30 // A klassOop is the C++ equivalent of a Java class. 31 // Part of a klassOopDesc is a Klass which handle the 32 // dispatching for the C++ method calls. 33 34 // klassOop object layout: 35 // [header ] 36 // [klass_field] 37 // [KLASS ] 38 39 class klassOopDesc : public oopDesc { 40 public: 41 // size operation 42 static int header_size() { return sizeof(klassOopDesc)/HeapWordSize; } 43 44 // support for code generation 45 static int klass_part_offset_in_bytes() { return sizeof(klassOopDesc); } 46 47 // returns the Klass part containing dispatching behavior 48 Klass* klass_part() { return (Klass*)((address)this + klass_part_offset_in_bytes()); } 49 }; 50 51 #endif // SHARE_VM_OOPS_KLASSOOP_HPP