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/*
* Copyright (C) 2017-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ActiveDOMCallback.h"
#include "JSDOMGlobalObject.h"
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/JSCell.h>
#include <JavaScriptCore/SlotVisitorInlines.h>
#include <JavaScriptCore/StrongInlines.h>
namespace WebCore {
class WEBCORE_EXPORT DOMGuardedObject : public RefCounted<DOMGuardedObject>, public ActiveDOMCallback {
public:
~DOMGuardedObject();
bool isSuspended() const { return !m_guarded || !canInvokeCallback(); } // The wrapper world has gone away or active DOM objects have been suspended.
template<typename Visitor> void visitAggregate(Visitor& visitor) { visitor.append(m_guarded); }
JSC::JSValue guardedObject() const { return m_guarded.get(); }
JSDOMGlobalObject* globalObject() const { return m_globalObject.get(); }
void clear();
protected:
DOMGuardedObject(JSDOMGlobalObject&, JSC::JSCell&);
void contextDestroyed();
bool isEmpty() const { return !m_guarded; }
JSC::Weak<JSC::JSCell> m_guarded;
JSC::Weak<JSDOMGlobalObject> m_globalObject;
private:
void removeFromGlobalObject();
};
template<typename T> class DOMGuarded : public DOMGuardedObject {
protected:
DOMGuarded(JSDOMGlobalObject& globalObject, T& guarded)
: DOMGuardedObject(globalObject, guarded)
{
}
T* guarded() const { return JSC::jsDynamicCast<T*>(guardedObject()); }
};
} // namespace WebCore
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