1/*
2 * Copyright (C) 2013 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. ``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 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#pragma once
27
28#include "GCIncomingRefCountedSet.h"
29#include "VM.h"
30
31namespace JSC {
32
33template<typename T>
34GCIncomingRefCountedSet<T>::GCIncomingRefCountedSet()
35 : m_bytes(0)
36{
37}
38
39template<typename T>
40void GCIncomingRefCountedSet<T>::lastChanceToFinalize()
41{
42 for (size_t i = m_vector.size(); i--;)
43 m_vector[i]->filterIncomingReferences([] (JSCell*) { return false; });
44}
45
46template<typename T>
47bool GCIncomingRefCountedSet<T>::addReference(JSCell* cell, T* object)
48{
49 if (!object->addIncomingReference(cell)) {
50 ASSERT(object->isDeferred());
51 ASSERT(object->numberOfIncomingReferences());
52 return false;
53 }
54 m_vector.append(object);
55 m_bytes += object->gcSizeEstimateInBytes();
56 ASSERT(object->isDeferred());
57 ASSERT(object->numberOfIncomingReferences());
58 return true;
59}
60
61template<typename T>
62void GCIncomingRefCountedSet<T>::sweep(VM& vm)
63{
64 for (size_t i = 0; i < m_vector.size(); ++i) {
65 T* object = m_vector[i];
66 size_t size = object->gcSizeEstimateInBytes();
67 ASSERT(object->isDeferred());
68 ASSERT(object->numberOfIncomingReferences());
69 if (!object->filterIncomingReferences([&] (JSCell* cell) { return vm.heap.isMarked(cell); }))
70 continue;
71 m_bytes -= size;
72 m_vector[i--] = m_vector.last();
73 m_vector.removeLast();
74 }
75}
76
77} // namespace JSC
78