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 LayerTreeContext_h
27#define LayerTreeContext_h
28
29#include <stdint.h>
30
31namespace IPC {
32class ArgumentDecoder;
33class ArgumentEncoder;
34}
35
36namespace WebKit {
37
38enum class LayerHostingMode {
39    InProcess,
40#if HAVE(OUT_OF_PROCESS_LAYER_HOSTING)
41    OutOfProcess
42#endif
43};
44
45class LayerTreeContext {
46public:
47    LayerTreeContext();
48    ~LayerTreeContext();
49
50    void encode(IPC::ArgumentEncoder&) const;
51    static bool decode(IPC::ArgumentDecoder&, LayerTreeContext&);
52
53    bool isEmpty() const;
54
55    uint64_t contextID;
56};
57
58bool operator==(const LayerTreeContext&, const LayerTreeContext&);
59
60inline bool operator!=(const LayerTreeContext& a, const LayerTreeContext& b)
61{
62    return !(a == b);
63}
64
65};
66
67#endif // LayerTreeContext_h
68