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