1/* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef HandleTypes_h 27#define HandleTypes_h 28 29#include "JSCJSValue.h" 30 31namespace JSC { 32 33typedef enum { } Unknown; 34typedef JSValue* HandleSlot; 35 36template<typename T> struct HandleTypes { 37 typedef T* ExternalType; 38 static ExternalType getFromSlot(HandleSlot slot) { return (slot && *slot) ? reinterpret_cast<ExternalType>(static_cast<void*>(slot->asCell())) : 0; } 39 static JSValue toJSValue(T* cell) { return reinterpret_cast<JSCell*>(cell); } 40 template<typename U> static void validateUpcast() { T* temp; temp = (U*)0; } 41}; 42 43template<> struct HandleTypes<Unknown> { 44 typedef JSValue ExternalType; 45 static ExternalType getFromSlot(HandleSlot slot) { return slot ? *slot : JSValue(); } 46 static JSValue toJSValue(const JSValue& v) { return v; } 47 template<typename U> static void validateUpcast() { } 48}; 49 50} // namespace JSC 51 52#endif // HandleTypes_h 53