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comparison src/share/vm/oops/objArrayOop.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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 public:
30 // Accessing
31 oop obj_at(int index) const { return *obj_at_addr(index); }
32 void obj_at_put(int index, oop value) { oop_store(obj_at_addr(index), value); }
33 oop* base() const { return (oop*) arrayOopDesc::base(T_OBJECT); }
34
35 // Sizing
36 static int header_size() { return arrayOopDesc::header_size(T_OBJECT); }
37 static int object_size(int length) { return align_object_size(header_size() + length); }
38 int object_size() { return object_size(length()); }
39
40 // Returns the address of the index'th element
41 oop* obj_at_addr(int index) const {
42 assert(is_within_bounds(index), "index out of bounds");
43 return &base()[index];
44 }
45 };