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/*
* Copyright (C) 2014-2021 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 "VM.h"
#include "WriteBarrier.h"
namespace JSC {
template <typename T, typename Traits>
inline void WriteBarrierBase<T, Traits>::set(VM& vm, const JSCell* owner, T* value)
{
ASSERT(value);
ASSERT(!Options::useConcurrentJIT() || !isCompilationThread());
validateCell(value);
setEarlyValue(vm, owner, value);
}
template <typename T, typename Traits>
inline void WriteBarrierBase<T, Traits>::setMayBeNull(VM& vm, const JSCell* owner, T* value)
{
if (value)
validateCell(value);
setEarlyValue(vm, owner, value);
}
template <typename T, typename Traits>
inline void WriteBarrierBase<T, Traits>::setEarlyValue(VM& vm, const JSCell* owner, T* value)
{
Traits::exchange(this->m_cell, value);
vm.writeBarrier(owner, static_cast<JSCell*>(value));
}
inline void WriteBarrierBase<Unknown, RawValueTraits<Unknown>>::set(VM& vm, const JSCell* owner, JSValue value)
{
ASSERT(!Options::useConcurrentJIT() || !isCompilationThread());
m_value = JSValue::encode(value);
vm.writeBarrier(owner, value);
}
inline void WriteBarrierStructureID::set(VM& vm, const JSCell* owner, Structure* value)
{
ASSERT(value);
ASSERT(!Options::useConcurrentJIT() || !isCompilationThread());
validateCell(reinterpret_cast<JSCell*>(value));
setEarlyValue(vm, owner, value);
}
inline void WriteBarrierStructureID::setMayBeNull(VM& vm, const JSCell* owner, Structure* value)
{
if (value)
validateCell(reinterpret_cast<JSCell*>(value));
setEarlyValue(vm, owner, value);
}
inline void WriteBarrierStructureID::setEarlyValue(VM& vm, const JSCell* owner, Structure* value)
{
if (!value) {
m_structureID = { };
return;
}
m_structureID = StructureID::encode(value);
vm.writeBarrier(owner, reinterpret_cast<JSCell*>(value));
}
} // namespace JSC