typeArrayOop.hpp revision 2273:1d1603768966 
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
59class 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
176