1/*
2 * Copyright (C) 2017 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 "JSDOMGuardedObject.h"
28
29
30namespace WebCore {
31using namespace JSC;
32
33DOMGuardedObject::DOMGuardedObject(JSDOMGlobalObject& globalObject, JSCell& guarded)
34 : ActiveDOMCallback(globalObject.scriptExecutionContext())
35 , m_guarded(&guarded)
36 , m_globalObject(&globalObject)
37{
38 auto locker = lockDuringMarking(globalObject.vm().heap, globalObject.gcLock());
39 globalObject.vm().heap.writeBarrier(&globalObject, &guarded);
40 globalObject.guardedObjects(locker).add(this);
41}
42
43DOMGuardedObject::~DOMGuardedObject()
44{
45 clear();
46}
47
48void DOMGuardedObject::clear()
49{
50 ASSERT(!m_guarded || m_globalObject);
51 if (m_guarded && m_globalObject) {
52 auto locker = lockDuringMarking(m_globalObject->vm().heap, m_globalObject->gcLock());
53 m_globalObject->guardedObjects(locker).remove(this);
54 }
55 m_guarded.clear();
56 m_globalObject.clear();
57}
58
59void DOMGuardedObject::contextDestroyed()
60{
61 ActiveDOMCallback::contextDestroyed();
62 clear();
63}
64
65}
66