/* * Copyright (C) 2016-2019 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 #if ENABLE(WEBASSEMBLY) #include "JSObject.h" #include "WasmMemory.h" #include <wtf/Ref.h> #include <wtf/RefPtr.h> namespace JSC { class ArrayBuffer; class JSArrayBuffer; class JSWebAssemblyMemory final : public JSNonFinalObject { public: using Base = JSNonFinalObject; static constexpr bool needsDestruction = true; static void destroy(JSCell*); template<typename CellType, SubspaceAccess mode> static IsoSubspace* subspaceFor(VM& vm) { return vm.webAssemblyMemorySpace<mode>(); } JS_EXPORT_PRIVATE static JSWebAssemblyMemory* tryCreate(JSGlobalObject*, VM&, Structure*); static Structure* createStructure(VM&, JSGlobalObject*, JSValue); DECLARE_EXPORT_INFO; JS_EXPORT_PRIVATE void adopt(Ref<Wasm::Memory>&&); Wasm::Memory& memory() { return m_memory.get(); } JSArrayBuffer* buffer(JSGlobalObject*); Wasm::PageCount grow(VM&, JSGlobalObject*, uint32_t delta); JS_EXPORT_PRIVATE void growSuccessCallback(VM&, Wasm::PageCount oldPageCount, Wasm::PageCount newPageCount); private: JSWebAssemblyMemory(VM&, Structure*); void finishCreation(VM&); static void visitChildren(JSCell*, SlotVisitor&); Ref<Wasm::Memory> m_memory; WriteBarrier<JSArrayBuffer> m_bufferWrapper; RefPtr<ArrayBuffer> m_buffer; }; } // namespace JSC #endif // ENABLE(WEBASSEMBLY)