| /* |
| * Copyright (C) 2017 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 "AuxiliaryBarrier.h" |
| #include <wtf/CagedPtr.h> |
| |
| namespace JSC { |
| |
| class JSCell; |
| class VM; |
| |
| // This is a convenient combo of AuxiliaryBarrier and CagedPtr. |
| |
| template<Gigacage::Kind passedKind, typename T> |
| class CagedBarrierPtr { |
| public: |
| static constexpr Gigacage::Kind kind = passedKind; |
| typedef T Type; |
| |
| CagedBarrierPtr() { } |
| |
| template<typename U> |
| CagedBarrierPtr(VM& vm, JSCell* cell, U&& value) |
| { |
| m_barrier.set(vm, cell, std::forward<U>(value)); |
| } |
| |
| void clear() { m_barrier.clear(); } |
| |
| template<typename U> |
| void set(VM& vm, JSCell* cell, U&& value) |
| { |
| m_barrier.set(vm, cell, std::forward<U>(value)); |
| } |
| |
| T* get() const { return m_barrier.get().get(); } |
| T* getMayBeNull() const { return m_barrier.get().getMayBeNull(); } |
| |
| bool operator==(const CagedBarrierPtr& other) const |
| { |
| return getMayBeNull() == other.getMayBeNull(); |
| } |
| |
| bool operator!=(const CagedBarrierPtr& other) const |
| { |
| return !(*this == other); |
| } |
| |
| explicit operator bool() const |
| { |
| return *this != CagedBarrierPtr(); |
| } |
| |
| template<typename U> |
| void setWithoutBarrier(U&& value) { m_barrier.setWithoutBarrier(std::forward<U>(value)); } |
| |
| T& operator*() const { return *get(); } |
| T* operator->() const { return get(); } |
| |
| template<typename IndexType> |
| T& operator[](IndexType index) const { return get()[index]; } |
| |
| private: |
| AuxiliaryBarrier<CagedPtr<kind, T>> m_barrier; |
| }; |
| |
| template<Gigacage::Kind passedKind> |
| class CagedBarrierPtr<passedKind, void> { |
| public: |
| static constexpr Gigacage::Kind kind = passedKind; |
| typedef void Type; |
| |
| CagedBarrierPtr() { } |
| |
| template<typename U> |
| CagedBarrierPtr(VM& vm, JSCell* cell, U&& value) |
| { |
| m_barrier.set(vm, cell, std::forward<U>(value)); |
| } |
| |
| void clear() { m_barrier.clear(); } |
| |
| template<typename U> |
| void set(VM& vm, JSCell* cell, U&& value) |
| { |
| m_barrier.set(vm, cell, std::forward<U>(value)); |
| } |
| |
| void* get() const { return m_barrier.get().get(); } |
| void* getMayBeNull() const { return m_barrier.get().getMayBeNull(); } |
| |
| bool operator==(const CagedBarrierPtr& other) const |
| { |
| return getMayBeNull() == other.getMayBeNull(); |
| } |
| |
| bool operator!=(const CagedBarrierPtr& other) const |
| { |
| return !(*this == other); |
| } |
| |
| explicit operator bool() const |
| { |
| return *this != CagedBarrierPtr(); |
| } |
| |
| template<typename U> |
| void setWithoutBarrier(U&& value) { m_barrier.setWithoutBarrier(std::forward<U>(value)); } |
| |
| private: |
| AuxiliaryBarrier<CagedPtr<kind, void>> m_barrier; |
| }; |
| |
| } // namespace JSC |