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/*
* Copyright (C) 2020 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. ``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
* 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 <wtf/CompactPointerTuple.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
namespace WTF {
template<typename T, typename Type>
class CompactRefPtrTuple final {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(CompactRefPtrTuple);
static_assert(::allowCompactPointers<T>());
public:
CompactRefPtrTuple() = default;
~CompactRefPtrTuple()
{
WTF::DefaultRefDerefTraits<T>::derefIfNotNull(m_data.pointer());
}
T* pointer() const
{
return m_data.pointer();
}
void setPointer(T* pointer)
{
auto* old = m_data.pointer();
m_data.setPointer(WTF::DefaultRefDerefTraits<T>::refIfNotNull(pointer));
WTF::DefaultRefDerefTraits<T>::derefIfNotNull(old);
}
void setPointer(RefPtr<T>&& pointer)
{
auto willRelease = WTFMove(pointer);
auto* old = m_data.pointer();
m_data.setPointer(willRelease.leakRef());
WTF::DefaultRefDerefTraits<T>::derefIfNotNull(old);
}
void setPointer(Ref<T>&& pointer)
{
auto willRelease = WTFMove(pointer);
auto* old = m_data.pointer();
m_data.setPointer(&willRelease.leakRef());
WTF::DefaultRefDerefTraits<T>::derefIfNotNull(old);
}
Type type() const { return m_data.type(); }
void setType(Type type)
{
m_data.setType(type);
}
private:
CompactPointerTuple<T*, Type> m_data;
};
} // namespace WTF
using WTF::CompactRefPtrTuple;
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