typeArrayOop.hpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 1997, 2012, 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_TYPEARRAYOOP_HPP 26#define SHARE_VM_OOPS_TYPEARRAYOOP_HPP 27 28#include "oops/arrayOop.hpp" 29#include "oops/typeArrayKlass.hpp" 30#ifdef TARGET_OS_ARCH_linux_x86 31# include "orderAccess_linux_x86.inline.hpp" 32#endif 33#ifdef TARGET_OS_ARCH_linux_sparc 34# include "orderAccess_linux_sparc.inline.hpp" 35#endif 36#ifdef TARGET_OS_ARCH_linux_zero 37# include "orderAccess_linux_zero.inline.hpp" 38#endif 39#ifdef TARGET_OS_ARCH_solaris_x86 40# include "orderAccess_solaris_x86.inline.hpp" 41#endif 42#ifdef TARGET_OS_ARCH_solaris_sparc 43# include "orderAccess_solaris_sparc.inline.hpp" 44#endif 45#ifdef TARGET_OS_ARCH_windows_x86 46# include "orderAccess_windows_x86.inline.hpp" 47#endif 48#ifdef TARGET_OS_ARCH_linux_arm 49# include "orderAccess_linux_arm.inline.hpp" 50#endif 51#ifdef TARGET_OS_ARCH_linux_ppc 52# include "orderAccess_linux_ppc.inline.hpp" 53#endif 54#ifdef TARGET_OS_ARCH_bsd_x86 55# include "orderAccess_bsd_x86.inline.hpp" 56#endif 57#ifdef TARGET_OS_ARCH_bsd_zero 58# include "orderAccess_bsd_zero.inline.hpp" 59#endif 60 61// A typeArrayOop is an array containing basic types (non oop elements). 62// It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs} 63#include <limits.h> 64 65class typeArrayOopDesc : public arrayOopDesc { 66 protected: 67 jchar* char_base() const { return (jchar*) base(T_CHAR); } 68 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); } 69 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); } 70 jint* int_base() const { return (jint*) base(T_INT); } 71 jlong* long_base() const { return (jlong*) base(T_LONG); } 72 jshort* short_base() const { return (jshort*) base(T_SHORT); } 73 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); } 74 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); } 75 76 friend class typeArrayKlass; 77 78 public: 79 jbyte* byte_at_addr(int which) const { 80 assert(is_within_bounds(which), "index out of bounds"); 81 return &byte_base()[which]; 82 } 83 84 jboolean* bool_at_addr(int which) const { 85 assert(is_within_bounds(which), "index out of bounds"); 86 return &bool_base()[which]; 87 } 88 89 jchar* char_at_addr(int which) const { 90 assert(is_within_bounds(which), "index out of bounds"); 91 return &char_base()[which]; 92 } 93 94 jint* int_at_addr(int which) const { 95 assert(is_within_bounds(which), "index out of bounds"); 96 return &int_base()[which]; 97 } 98 99 jshort* short_at_addr(int which) const { 100 assert(is_within_bounds(which), "index out of bounds"); 101 return &short_base()[which]; 102 } 103 104 jushort* ushort_at_addr(int which) const { // for field descriptor arrays 105 assert(is_within_bounds(which), "index out of bounds"); 106 return (jushort*) &short_base()[which]; 107 } 108 109 jlong* long_at_addr(int which) const { 110 assert(is_within_bounds(which), "index out of bounds"); 111 return &long_base()[which]; 112 } 113 114 jfloat* float_at_addr(int which) const { 115 assert(is_within_bounds(which), "index out of bounds"); 116 return &float_base()[which]; 117 } 118 119 jdouble* double_at_addr(int which) const { 120 assert(is_within_bounds(which), "index out of bounds"); 121 return &double_base()[which]; 122 } 123 124 jbyte byte_at(int which) const { return *byte_at_addr(which); } 125 void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; } 126 127 jboolean bool_at(int which) const { return *bool_at_addr(which); } 128 void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; } 129 130 jchar char_at(int which) const { return *char_at_addr(which); } 131 void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; } 132 133 jint int_at(int which) const { return *int_at_addr(which); } 134 void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; } 135 136 jshort short_at(int which) const { return *short_at_addr(which); } 137 void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; } 138 139 jushort ushort_at(int which) const { return *ushort_at_addr(which); } 140 void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; } 141 142 jlong long_at(int which) const { return *long_at_addr(which); } 143 void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; } 144 145 jfloat float_at(int which) const { return *float_at_addr(which); } 146 void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; } 147 148 jdouble double_at(int which) const { return *double_at_addr(which); } 149 void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; } 150 151 jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); } 152 void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); } 153 154 // Java thinks metadata arrays are just arrays of either long or int, since 155 // there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate 156 // casting 157#ifdef _LP64 158 Metadata* metadata_at(int which) const { 159 return (Metadata*)*long_at_addr(which); } 160 void metadata_at_put(int which, Metadata* contents) { 161 *long_at_addr(which) = (long)contents; 162 } 163#else 164 Metadata* metadata_at(int which) const { 165 return (Metadata*)*int_at_addr(which); } 166 void metadata_at_put(int which, Metadata* contents) { 167 *int_at_addr(which) = (int)contents; 168 } 169#endif // _LP64 170 171 // Sizing 172 173 // Returns the number of words necessary to hold an array of "len" 174 // elements each of the given "byte_size". 175 private: 176 static int object_size(int lh, int length) { 177 int instance_header_size = Klass::layout_helper_header_size(lh); 178 int element_shift = Klass::layout_helper_log2_element_size(lh); 179 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh)); 180 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow"); 181 182 julong size_in_bytes = length; 183 size_in_bytes <<= element_shift; 184 size_in_bytes += instance_header_size; 185 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize); 186 assert(size_in_words <= (julong)max_jint, "no overflow"); 187 188 return align_object_size((intptr_t)size_in_words); 189 } 190 191 public: 192 int object_size() { 193 typeArrayKlass* tk = typeArrayKlass::cast(klass()); 194 return object_size(tk->layout_helper(), length()); 195 } 196}; 197 198#endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP 199