1/*
2 * Copyright (C) 2012-2019 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#pragma once
27
28#include "JSObject.h"
29
30namespace JSC {
31
32struct ClassInfo;
33
34class JSDestructibleObject : public JSNonFinalObject {
35public:
36 typedef JSNonFinalObject Base;
37
38 static constexpr bool needsDestruction = true;
39
40 template<typename CellType, SubspaceAccess>
41 static CompleteSubspace* subspaceFor(VM& vm)
42 {
43 return &vm.destructibleObjectSpace;
44 }
45
46 const ClassInfo* classInfo() const { return m_classInfo; }
47
48 static ptrdiff_t classInfoOffset() { return OBJECT_OFFSETOF(JSDestructibleObject, m_classInfo); }
49
50protected:
51 JSDestructibleObject(VM& vm, Structure* structure, Butterfly* butterfly = 0)
52 : JSNonFinalObject(vm, structure, butterfly)
53 , m_classInfo(structure->classInfo())
54 {
55 ASSERT(m_classInfo);
56 }
57
58private:
59 const ClassInfo* m_classInfo;
60};
61
62} // namespace JSC
63