/* * Copyright (C) 2013-2018 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 "ArrayBuffer.h" #include "JSCPoison.h" #include "JSObject.h" #include <wtf/Poisoned.h> namespace JSC { class JSArrayBuffer final : public JSNonFinalObject { public: using Base = JSNonFinalObject; static const unsigned StructureFlags = Base::StructureFlags; protected: JSArrayBuffer(VM&, Structure*, RefPtr<ArrayBuffer>&&); void finishCreation(VM&, JSGlobalObject*); public: // This function will register the new wrapper with the vm's TypedArrayController. JS_EXPORT_PRIVATE static JSArrayBuffer* create(VM&, Structure*, RefPtr<ArrayBuffer>&&); ArrayBuffer* impl() const { return m_impl.unpoisoned(); } static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype); JS_EXPORT_PRIVATE bool isShared() const; ArrayBufferSharingMode sharingMode() const; DECLARE_EXPORT_INFO; // This is the default DOM unwrapping. It calls toUnsharedArrayBuffer(). static ArrayBuffer* toWrapped(VM&, JSValue); protected: static size_t estimatedSize(JSCell*, VM&); private: Poisoned<JSArrayBufferPoison, ArrayBuffer*> m_impl; }; inline ArrayBuffer* toPossiblySharedArrayBuffer(VM& vm, JSValue value) { JSArrayBuffer* wrapper = jsDynamicCast<JSArrayBuffer*>(vm, value); if (!wrapper) return nullptr; return wrapper->impl(); } inline ArrayBuffer* toUnsharedArrayBuffer(VM& vm, JSValue value) { ArrayBuffer* result = toPossiblySharedArrayBuffer(vm, value); if (!result || result->isShared()) return nullptr; return result; } inline ArrayBuffer* JSArrayBuffer::toWrapped(VM& vm, JSValue value) { return toUnsharedArrayBuffer(vm, value); } } // namespace JSC