1 /* 2 * Copyright (c) 1997, 2011, 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 // returns the Klass part containing dispatching behavior 42 Klass* klass_part() const { return (Klass*)((address)this + sizeof(klassOopDesc)); } 43 44 // Convenience wrapper 45 inline oop java_mirror() const; 46 47 private: 48 // These have no implementation since klassOop should never be accessed in this fashion 49 oop obj_field(int offset) const; 50 volatile oop obj_field_volatile(int offset) const; 51 void obj_field_put(int offset, oop value); 52 void obj_field_put_raw(int offset, oop value); 53 void obj_field_put_volatile(int offset, oop value); 54 55 jbyte byte_field(int offset) const; 56 void byte_field_put(int offset, jbyte contents); 57 58 jchar char_field(int offset) const; 59 void char_field_put(int offset, jchar contents); 60 61 jboolean bool_field(int offset) const; 62 void bool_field_put(int offset, jboolean contents); 63 64 jint int_field(int offset) const; 65 void int_field_put(int offset, jint contents); 66 67 jshort short_field(int offset) const; 68 void short_field_put(int offset, jshort contents); 69 70 jlong long_field(int offset) const; 71 void long_field_put(int offset, jlong contents); 72 73 jfloat float_field(int offset) const; 74 void float_field_put(int offset, jfloat contents); 75 76 jdouble double_field(int offset) const; 77 void double_field_put(int offset, jdouble contents); 78 79 address address_field(int offset) const; 80 void address_field_put(int offset, address contents); 81 82 oop obj_field_acquire(int offset) const; 83 void release_obj_field_put(int offset, oop value); 84 85 jbyte byte_field_acquire(int offset) const; 86 void release_byte_field_put(int offset, jbyte contents); 87 88 jchar char_field_acquire(int offset) const; 89 void release_char_field_put(int offset, jchar contents); 90 91 jboolean bool_field_acquire(int offset) const; 92 void release_bool_field_put(int offset, jboolean contents); 93 94 jint int_field_acquire(int offset) const; 95 void release_int_field_put(int offset, jint contents); 96 97 jshort short_field_acquire(int offset) const; 98 void release_short_field_put(int offset, jshort contents); 99 100 jlong long_field_acquire(int offset) const; 101 void release_long_field_put(int offset, jlong contents); 102 103 jfloat float_field_acquire(int offset) const; 104 void release_float_field_put(int offset, jfloat contents); 105 106 jdouble double_field_acquire(int offset) const; 107 void release_double_field_put(int offset, jdouble contents); 108 109 address address_field_acquire(int offset) const; 110 void release_address_field_put(int offset, address contents); 111 }; 112 113 #endif // SHARE_VM_OOPS_KLASSOOP_HPP