1/*
2 * Copyright (C) 2019 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "CachePayload.h"
29#include "CachedTypes.h"
30#include "CodeSpecializationKind.h"
31#include <wtf/Variant.h>
32
33namespace JSC {
34
35class CacheUpdate {
36public:
37 struct GlobalUpdate {
38 CachePayload m_payload;
39 };
40
41 struct FunctionUpdate {
42 ptrdiff_t m_base;
43 CodeSpecializationKind m_kind;
44 CachedFunctionExecutableMetadata m_metadata;
45 CachePayload m_payload;
46 };
47
48
49 CacheUpdate(GlobalUpdate&&);
50 CacheUpdate(FunctionUpdate&&);
51
52 CacheUpdate(CacheUpdate&&);
53 CacheUpdate& operator=(CacheUpdate&&);
54
55 bool isGlobal() const;
56 const GlobalUpdate& asGlobal() const;
57 const FunctionUpdate& asFunction() const;
58
59private:
60 Variant<GlobalUpdate, FunctionUpdate> m_update;
61};
62
63} // namespace JSC
64