1/*
2 * Copyright (C) 2014 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 "TypeLocation.h"
29#include <wtf/FastMalloc.h>
30#include <wtf/HashMethod.h>
31#include <wtf/StdUnorderedMap.h>
32
33namespace JSC {
34
35class VM;
36
37class TypeLocationCache {
38public:
39 struct LocationKey {
40 LocationKey() {}
41 bool operator==(const LocationKey& other) const
42 {
43 return m_globalVariableID == other.m_globalVariableID
44 && m_sourceID == other.m_sourceID
45 && m_start == other.m_start
46 && m_end == other.m_end;
47 }
48
49 unsigned hash() const
50 {
51 return m_globalVariableID + m_sourceID + m_start + m_end;
52 }
53
54 GlobalVariableID m_globalVariableID;
55 intptr_t m_sourceID;
56 unsigned m_start;
57 unsigned m_end;
58 };
59
60 std::pair<TypeLocation*, bool> getTypeLocation(GlobalVariableID, intptr_t, unsigned start, unsigned end, RefPtr<TypeSet>&&, VM*);
61private:
62 using LocationMap = StdUnorderedMap<LocationKey, TypeLocation*, HashMethod<LocationKey>>;
63 LocationMap m_locationMap;
64};
65
66} // namespace JSC
67