1/*
2 * Copyright (C) 2013, 2014 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 INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "DFGDesiredWeakReferences.h"
28
29#if ENABLE(DFG_JIT)
30
31#include "CodeBlock.h"
32#include "DFGCommonData.h"
33#include "JSCInlines.h"
34
35namespace JSC { namespace DFG {
36
37DesiredWeakReferences::DesiredWeakReferences()
38    : m_codeBlock(nullptr)
39{
40}
41
42DesiredWeakReferences::DesiredWeakReferences(CodeBlock* codeBlock)
43    : m_codeBlock(codeBlock)
44{
45}
46
47DesiredWeakReferences::~DesiredWeakReferences()
48{
49}
50
51void DesiredWeakReferences::addLazily(JSCell* cell)
52{
53    m_references.append(cell);
54}
55
56void DesiredWeakReferences::reallyAdd(VM& vm, CommonData* common)
57{
58    for (unsigned i = 0; i < m_references.size(); i++) {
59        JSCell* target = m_references[i];
60        common->weakReferences.append(WriteBarrier<JSCell>(vm, m_codeBlock->ownerExecutable(), target));
61    }
62}
63
64void DesiredWeakReferences::visitChildren(SlotVisitor& visitor)
65{
66    for (unsigned i = m_references.size(); i--;)
67        visitor.appendUnbarrieredPointer(&m_references[i]);
68}
69
70} } // namespace JSC::DFG
71
72#endif // ENABLE(DFG_JIT)
73