duke@435: /*
duke@435:  * Copyright 1997-2002 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // A klassOop is the C++ equivalent of a Java class.
duke@435: // Part of a klassOopDesc is a Klass which handle the
duke@435: // dispatching for the C++ method calls.
duke@435: 
duke@435: //  klassOop object layout:
duke@435: //    [header     ]
duke@435: //    [klass_field]
duke@435: //    [KLASS      ]
duke@435: 
duke@435: class klassOopDesc : public oopDesc {
duke@435:  public:
duke@435:   // size operation
duke@435:   static int header_size()                       { return sizeof(klassOopDesc)/HeapWordSize; }
duke@435: 
duke@435:   // support for code generation
duke@435:   static int klass_part_offset_in_bytes()        { return sizeof(klassOopDesc); }
duke@435: 
duke@435:   // returns the Klass part containing dispatching behavior
duke@435:   Klass* klass_part()                            { return (Klass*)((address)this + klass_part_offset_in_bytes()); }
duke@435: };