Mercurial > hg > truffle
comparison src/share/vm/oops/fieldStreams.hpp @ 4137:04b9a2566eec
Merge with hsx23/hotspot.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 21:40:27 +0100 |
parents | e6b1331a51d2 |
children | 71afdabfd05b |
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3737:9dc19b7d89a3 | 4137:04b9a2566eec |
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1 /* | |
2 * Copyright (c) 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_FIELDSTREAMS_HPP | |
26 #define SHARE_VM_OOPS_FIELDSTREAMS_HPP | |
27 | |
28 #include "oops/instanceKlass.hpp" | |
29 #include "oops/fieldInfo.hpp" | |
30 | |
31 // The is the base class for iteration over the fields array | |
32 // describing the declared fields in the class. Several subclasses | |
33 // are provided depending on the kind of iteration required. The | |
34 // JavaFieldStream is for iterating over regular Java fields and it | |
35 // generally the preferred iterator. InternalFieldStream only | |
36 // iterates over fields that have been injected by the JVM. | |
37 // AllFieldStream exposes all fields and should only be used in rare | |
38 // cases. | |
39 class FieldStreamBase : public StackObj { | |
40 protected: | |
41 typeArrayHandle _fields; | |
42 constantPoolHandle _constants; | |
43 int _index; | |
44 int _limit; | |
45 | |
46 FieldInfo* field() const { return FieldInfo::from_field_array(_fields(), _index); } | |
47 | |
48 FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants, int start, int limit) { | |
49 _fields = fields; | |
50 _constants = constants; | |
51 _index = start; | |
52 _limit = limit; | |
53 } | |
54 | |
55 FieldStreamBase(typeArrayHandle fields, constantPoolHandle constants) { | |
56 _fields = fields; | |
57 _constants = constants; | |
58 _index = 0; | |
59 _limit = fields->length() / FieldInfo::field_slots; | |
60 } | |
61 | |
62 public: | |
63 FieldStreamBase(instanceKlass* klass) { | |
64 _fields = klass->fields(); | |
65 _constants = klass->constants(); | |
66 _index = 0; | |
67 _limit = klass->java_fields_count(); | |
68 } | |
69 FieldStreamBase(instanceKlassHandle klass) { | |
70 _fields = klass->fields(); | |
71 _constants = klass->constants(); | |
72 _index = 0; | |
73 _limit = klass->java_fields_count(); | |
74 } | |
75 | |
76 // accessors | |
77 int index() const { return _index; } | |
78 | |
79 void next() { _index += 1; } | |
80 bool done() const { return _index >= _limit; } | |
81 | |
82 // Accessors for current field | |
83 AccessFlags access_flags() const { | |
84 AccessFlags flags; | |
85 flags.set_flags(field()->access_flags()); | |
86 return flags; | |
87 } | |
88 | |
89 void set_access_flags(u2 flags) const { | |
90 field()->set_access_flags(flags); | |
91 } | |
92 | |
93 void set_access_flags(AccessFlags flags) const { | |
94 set_access_flags(flags.as_short()); | |
95 } | |
96 | |
97 Symbol* name() const { | |
98 return field()->name(_constants); | |
99 } | |
100 | |
101 Symbol* signature() const { | |
102 return field()->signature(_constants); | |
103 } | |
104 | |
105 Symbol* generic_signature() const { | |
106 return field()->generic_signature(_constants); | |
107 } | |
108 | |
109 int offset() const { | |
110 return field()->offset(); | |
111 } | |
112 | |
113 void set_offset(int offset) { | |
114 field()->set_offset(offset); | |
115 } | |
116 }; | |
117 | |
118 // Iterate over only the internal fields | |
119 class JavaFieldStream : public FieldStreamBase { | |
120 public: | |
121 JavaFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {} | |
122 JavaFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), 0, k->java_fields_count()) {} | |
123 | |
124 int name_index() const { | |
125 assert(!field()->is_internal(), "regular only"); | |
126 return field()->name_index(); | |
127 } | |
128 void set_name_index(int index) { | |
129 assert(!field()->is_internal(), "regular only"); | |
130 field()->set_name_index(index); | |
131 } | |
132 int signature_index() const { | |
133 assert(!field()->is_internal(), "regular only"); | |
134 return field()->signature_index(); | |
135 } | |
136 void set_signature_index(int index) { | |
137 assert(!field()->is_internal(), "regular only"); | |
138 field()->set_signature_index(index); | |
139 } | |
140 int generic_signature_index() const { | |
141 assert(!field()->is_internal(), "regular only"); | |
142 return field()->generic_signature_index(); | |
143 } | |
144 void set_generic_signature_index(int index) { | |
145 assert(!field()->is_internal(), "regular only"); | |
146 field()->set_generic_signature_index(index); | |
147 } | |
148 int initval_index() const { | |
149 assert(!field()->is_internal(), "regular only"); | |
150 return field()->initval_index(); | |
151 } | |
152 void set_initval_index(int index) { | |
153 assert(!field()->is_internal(), "regular only"); | |
154 return field()->set_initval_index(index); | |
155 } | |
156 }; | |
157 | |
158 | |
159 // Iterate over only the internal fields | |
160 class InternalFieldStream : public FieldStreamBase { | |
161 public: | |
162 InternalFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {} | |
163 InternalFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants(), k->java_fields_count(), k->all_fields_count()) {} | |
164 }; | |
165 | |
166 | |
167 class AllFieldStream : public FieldStreamBase { | |
168 public: | |
169 AllFieldStream(typeArrayHandle fields, constantPoolHandle constants): FieldStreamBase(fields, constants) {} | |
170 AllFieldStream(instanceKlass* k): FieldStreamBase(k->fields(), k->constants()) {} | |
171 AllFieldStream(instanceKlassHandle k): FieldStreamBase(k->fields(), k->constants()) {} | |
172 }; | |
173 | |
174 #endif // SHARE_VM_OOPS_FIELDSTREAMS_HPP |