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 // 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() const { return (Klass*)((address)this + klass_part_offset_in_bytes()); } 49 50 // Convenience wrapper 51 inline oop java_mirror() const; 52 53 private: 54 // These have no implementation since klassOop should never be accessed in this fashion 55 oop obj_field(int offset) const; 56 void obj_field_put(int offset, oop value); 57 void obj_field_raw_put(int offset, oop value); 58 59 jbyte byte_field(int offset) const; 60 void byte_field_put(int offset, jbyte contents); 61 62 jchar char_field(int offset) const; 63 void char_field_put(int offset, jchar contents); 64 65 jboolean bool_field(int offset) const; 66 void bool_field_put(int offset, jboolean contents); 67 68 jint int_field(int offset) const; 69 void int_field_put(int offset, jint contents); 70 71 jshort short_field(int offset) const; 72 void short_field_put(int offset, jshort contents); 73 74 jlong long_field(int offset) const; 75 void long_field_put(int offset, jlong contents); 76 77 jfloat float_field(int offset) const; 78 void float_field_put(int offset, jfloat contents); 79 80 jdouble double_field(int offset) const; 81 void double_field_put(int offset, jdouble contents); 82 83 address address_field(int offset) const; 84 void address_field_put(int offset, address contents); 85 86 oop obj_field_acquire(int offset) const; 87 void release_obj_field_put(int offset, oop value); 88 89 jbyte byte_field_acquire(int offset) const; 90 void release_byte_field_put(int offset, jbyte contents); 91 92 jchar char_field_acquire(int offset) const; 93 void release_char_field_put(int offset, jchar contents); 94 95 jboolean bool_field_acquire(int offset) const; 96 void release_bool_field_put(int offset, jboolean contents); 97 98 jint int_field_acquire(int offset) const; 99 void release_int_field_put(int offset, jint contents); 100 101 jshort short_field_acquire(int offset) const; 102 void release_short_field_put(int offset, jshort contents); 103 104 jlong long_field_acquire(int offset) const; 105 void release_long_field_put(int offset, jlong contents); 106 107 jfloat float_field_acquire(int offset) const; 108 void release_float_field_put(int offset, jfloat contents); 109 110 jdouble double_field_acquire(int offset) const; 111 void release_double_field_put(int offset, jdouble contents); 112 113 address address_field_acquire(int offset) const; 114 void release_address_field_put(int offset, address contents); 115 }; 116 117 #endif // SHARE_VM_OOPS_KLASSOOP_HPP