1 /*
2 * Copyright (c) 1997, 2009, 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 // An objArrayOop is an array containing oops.
26 // Evaluating "String arg[10]" will create an objArrayOop.
27
28 class objArrayOopDesc : public arrayOopDesc {
29 friend class objArrayKlass;
30 friend class Runtime1;
31 friend class psPromotionManager;
32 friend class CSMarkOopClosure;
33 friend class G1ParScanPartialArrayClosure;
34
35 template <class T> T* obj_at_addr(int index) const {
36 assert(is_within_bounds(index), "index out of bounds");
37 return &((T*)base())[index];
38 }
39
40 private:
41 // Give size of objArrayOop in HeapWords minus the header
42 static int array_size(int length) {
43 const int OopsPerHeapWord = HeapWordSize/heapOopSize;
44 assert(OopsPerHeapWord >= 1 && (HeapWordSize % heapOopSize == 0),
93 // Sizing
94 static int header_size() { return arrayOopDesc::header_size(T_OBJECT); }
95 int object_size() { return object_size(length()); }
96
97 static int object_size(int length) {
98 // This returns the object size in HeapWords.
99 uint asz = array_size(length);
100 uint osz = align_object_size(header_size() + asz);
101 assert(osz >= asz, "no overflow");
102 assert((int)osz > 0, "no overflow");
103 return (int)osz;
104 }
105
106 // special iterators for index ranges, returns size of object
107 #define ObjArrayOop_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
108 int oop_iterate_range(OopClosureType* blk, int start, int end);
109
110 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayOop_OOP_ITERATE_DECL)
111 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayOop_OOP_ITERATE_DECL)
112 };
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1 /*
2 * Copyright (c) 1997, 2010, 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_OBJARRAYOOP_HPP
26 #define SHARE_VM_OOPS_OBJARRAYOOP_HPP
27
28 #include "oops/arrayOop.hpp"
29
30 // An objArrayOop is an array containing oops.
31 // Evaluating "String arg[10]" will create an objArrayOop.
32
33 class objArrayOopDesc : public arrayOopDesc {
34 friend class objArrayKlass;
35 friend class Runtime1;
36 friend class psPromotionManager;
37 friend class CSMarkOopClosure;
38 friend class G1ParScanPartialArrayClosure;
39
40 template <class T> T* obj_at_addr(int index) const {
41 assert(is_within_bounds(index), "index out of bounds");
42 return &((T*)base())[index];
43 }
44
45 private:
46 // Give size of objArrayOop in HeapWords minus the header
47 static int array_size(int length) {
48 const int OopsPerHeapWord = HeapWordSize/heapOopSize;
49 assert(OopsPerHeapWord >= 1 && (HeapWordSize % heapOopSize == 0),
98 // Sizing
99 static int header_size() { return arrayOopDesc::header_size(T_OBJECT); }
100 int object_size() { return object_size(length()); }
101
102 static int object_size(int length) {
103 // This returns the object size in HeapWords.
104 uint asz = array_size(length);
105 uint osz = align_object_size(header_size() + asz);
106 assert(osz >= asz, "no overflow");
107 assert((int)osz > 0, "no overflow");
108 return (int)osz;
109 }
110
111 // special iterators for index ranges, returns size of object
112 #define ObjArrayOop_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
113 int oop_iterate_range(OopClosureType* blk, int start, int end);
114
115 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayOop_OOP_ITERATE_DECL)
116 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayOop_OOP_ITERATE_DECL)
117 };
118
119 #endif // SHARE_VM_OOPS_OBJARRAYOOP_HPP
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