mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-30 07:30:47 +00:00
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "JSCJSValue.h"
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#include <wtf/StdLibExtras.h>
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namespace JSC {
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namespace Wasm {
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class Callee;
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}
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class JSCell;
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class CalleeBits {
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public:
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CalleeBits() = default;
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CalleeBits(void* ptr) : m_ptr(ptr) { }
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CalleeBits& operator=(JSCell* cell)
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{
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m_ptr = cell;
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ASSERT(isCell());
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return *this;
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}
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#if ENABLE(WEBASSEMBLY)
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static void* boxWasm(Wasm::Callee* callee)
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{
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CalleeBits result(bitwise_cast<void*>(bitwise_cast<uintptr_t>(callee) | TagBitsWasm));
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ASSERT(result.isWasm());
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return result.rawPtr();
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}
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#endif
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bool isWasm() const
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{
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#if ENABLE(WEBASSEMBLY)
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return (bitwise_cast<uintptr_t>(m_ptr) & TagWasmMask) == TagBitsWasm;
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#else
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return false;
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#endif
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}
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bool isCell() const { return !isWasm(); }
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JSCell* asCell() const
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{
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ASSERT(!isWasm());
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return static_cast<JSCell*>(m_ptr);
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}
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#if ENABLE(WEBASSEMBLY)
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Wasm::Callee* asWasmCallee() const
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{
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ASSERT(isWasm());
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return bitwise_cast<Wasm::Callee*>(bitwise_cast<uintptr_t>(m_ptr) & ~TagBitsWasm);
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}
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#endif
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void* rawPtr() const { return m_ptr; }
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private:
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void* m_ptr { nullptr };
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};
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} // namespace JSC
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