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_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
55 // A typeArrayOop is an array containing basic types (non oop elements).
56 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
57 #include <limits.h>
58
59 class typeArrayOopDesc : public arrayOopDesc {
60 protected:
61 jchar* char_base() const { return (jchar*) base(T_CHAR); }
62 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
63 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
64 jint* int_base() const { return (jint*) base(T_INT); }
65 jlong* long_base() const { return (jlong*) base(T_LONG); }
66 jshort* short_base() const { return (jshort*) base(T_SHORT); }
67 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
68 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
69
70 friend class typeArrayKlass;
71
72 public:
73 jbyte* byte_at_addr(int which) const {
74 assert(is_within_bounds(which), "index out of bounds");
75 return &byte_base()[which];
76 }
77
78 jboolean* bool_at_addr(int which) const {
79 assert(is_within_bounds(which), "index out of bounds");
80 return &bool_base()[which];
81 }
82
83 jchar* char_at_addr(int which) const {
84 assert(is_within_bounds(which), "index out of bounds");
85 return &char_base()[which];
86 }
87
88 jint* int_at_addr(int which) const {
89 assert(is_within_bounds(which), "index out of bounds");
90 return &int_base()[which];
91 }
92
93 jshort* short_at_addr(int which) const {
94 assert(is_within_bounds(which), "index out of bounds");
95 return &short_base()[which];
96 }
97
98 jushort* ushort_at_addr(int which) const { // for field descriptor arrays
99 assert(is_within_bounds(which), "index out of bounds");
100 return (jushort*) &short_base()[which];
101 }
102
103 jlong* long_at_addr(int which) const {
104 assert(is_within_bounds(which), "index out of bounds");
105 return &long_base()[which];
106 }
107
108 jfloat* float_at_addr(int which) const {
109 assert(is_within_bounds(which), "index out of bounds");
110 return &float_base()[which];
111 }
112
113 jdouble* double_at_addr(int which) const {
114 assert(is_within_bounds(which), "index out of bounds");
115 return &double_base()[which];
116 }
117
118 jbyte byte_at(int which) const { return *byte_at_addr(which); }
119 void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; }
120
121 jboolean bool_at(int which) const { return *bool_at_addr(which); }
122 void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; }
123
124 jchar char_at(int which) const { return *char_at_addr(which); }
125 void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; }
126
127 jint int_at(int which) const { return *int_at_addr(which); }
128 void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; }
129
130 jshort short_at(int which) const { return *short_at_addr(which); }
131 void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; }
132
133 jushort ushort_at(int which) const { return *ushort_at_addr(which); }
134 void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }
135
136 jlong long_at(int which) const { return *long_at_addr(which); }
137 void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; }
138
139 jfloat float_at(int which) const { return *float_at_addr(which); }
140 void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; }
141
142 jdouble double_at(int which) const { return *double_at_addr(which); }
143 void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }
144
145 jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); }
146 void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }
147
148 // Sizing
149
150 // Returns the number of words necessary to hold an array of "len"
151 // elements each of the given "byte_size".
152 private:
153 static int object_size(int lh, int length) {
154 int instance_header_size = Klass::layout_helper_header_size(lh);
155 int element_shift = Klass::layout_helper_log2_element_size(lh);
156 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
157 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
158
159 julong size_in_bytes = length;
160 size_in_bytes <<= element_shift;
161 size_in_bytes += instance_header_size;
162 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
163 assert(size_in_words <= (julong)max_jint, "no overflow");
164
165 return align_object_size((intptr_t)size_in_words);
166 }
167
168 public:
169 int object_size() {
170 typeArrayKlass* tk = typeArrayKlass::cast(klass());
171 return object_size(tk->layout_helper(), length());
172 }
173 };
174
175 #endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP