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/*
* Copyright (C) 2010 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.
*/
#ifndef JSDebugWrapperSet_h
#define JSDebugWrapperSet_h
#include "JSDOMWrapper.h"
#include <wtf/HashSet.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
// For debugging, keep a set of wrappers currently cached, and check that
// all are uncached before they are destroyed. This helps us catch bugs like:
// - wrappers being deleted without being removed from the cache
// - wrappers being cached twice
class JSDebugWrapperSet : public Noncopyable {
friend class WTF::ThreadSpecific<JSDebugWrapperSet>;
public:
static JSDebugWrapperSet& shared();
void add(DOMObject* object) { m_wrapperSet.add(object); }
void remove(DOMObject* object) { m_wrapperSet.remove(object); }
bool contains(DOMObject* object) const { return m_wrapperSet.contains(object); }
static void willCacheWrapper(DOMObject*);
static void didUncacheWrapper(DOMObject*);
private:
JSDebugWrapperSet();
HashSet<DOMObject*> m_wrapperSet;
};
#ifdef NDEBUG
inline void JSDebugWrapperSet::willCacheWrapper(DOMObject*)
{
}
inline void JSDebugWrapperSet::didUncacheWrapper(DOMObject*)
{
}
#else
inline void JSDebugWrapperSet::willCacheWrapper(DOMObject* wrapper)
{
ASSERT(!JSDebugWrapperSet::shared().contains(wrapper));
JSDebugWrapperSet::shared().add(wrapper);
}
inline void JSDebugWrapperSet::didUncacheWrapper(DOMObject* wrapper)
{
if (!wrapper)
return;
ASSERT(JSDebugWrapperSet::shared().contains(wrapper));
JSDebugWrapperSet::shared().remove(wrapper);
}
#endif
} // namespace WebCore
#endif // JSDebugWrapperSet_h
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