1 /*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "StructureChain.h"
28
29 #include "JSObject.h"
30 #include "Structure.h"
31 #include <wtf/RefPtr.h>
32
33 namespace JSC {
34
35 ClassInfo StructureChain::s_info = { "StructureChain", 0, 0, 0 };
36
StructureChain(JSGlobalData & globalData,Structure * structure,Structure * head)37 StructureChain::StructureChain(JSGlobalData& globalData, Structure* structure, Structure* head)
38 : JSCell(globalData, structure)
39 {
40 size_t size = 0;
41 for (Structure* current = head; current; current = current->storedPrototype().isNull() ? 0 : asObject(current->storedPrototype())->structure())
42 ++size;
43
44 m_vector = adoptArrayPtr(new WriteBarrier<Structure>[size + 1]);
45
46 size_t i = 0;
47 for (Structure* current = head; current; current = current->storedPrototype().isNull() ? 0 : asObject(current->storedPrototype())->structure())
48 m_vector[i++].set(globalData, this, current);
49 m_vector[i].clear();
50 }
51
~StructureChain()52 StructureChain::~StructureChain()
53 {
54 }
55
markChildren(MarkStack & markStack)56 void StructureChain::markChildren(MarkStack& markStack)
57 {
58 size_t i = 0;
59 while (m_vector[i])
60 markStack.append(&m_vector[i++]);
61 }
62
63 } // namespace JSC
64