/* * Copyright (C) 2013 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. */ #ifndef SimpleTypedArrayController_h #define SimpleTypedArrayController_h #include "Handle.h" #include "TypedArrayController.h" #include "WeakHandleOwner.h" namespace JSC { // The default controller used for managing the relationship between // array buffers and their wrappers in JavaScriptCore. This isn't what // WebCore uses, but it is what JSC uses when running standalone. This // is pretty simple: // // - If the JSArrayBuffer is live, then the ArrayBuffer stays alive. // // - If there is a JSArrayBufferView that is holding an ArrayBuffer // then any existing wrapper for that ArrayBuffer will be kept // alive. // // - If you ask an ArrayBuffer for a JSArrayBuffer after one had // already been created and it didn't die, then you get the same // one. class SimpleTypedArrayController : public TypedArrayController { public: SimpleTypedArrayController(); virtual ~SimpleTypedArrayController(); JSArrayBuffer* toJS(ExecState*, JSGlobalObject*, ArrayBuffer*) override; void registerWrapper(JSGlobalObject*, ArrayBuffer*, JSArrayBuffer*) override; private: class JSArrayBufferOwner : public WeakHandleOwner { public: bool isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, SlotVisitor&) override; void finalize(JSC::Handle<JSC::Unknown>, void* context) override; }; JSArrayBufferOwner m_owner; }; } // namespace JSC #endif // SimpleTypedArrayController_h