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#if ENABLE(DFG_JIT)
29
30#include "DumpContext.h"
31#include <wtf/HashMap.h>
32#include <wtf/PrintStream.h>
33
34namespace JSC {
35
36class JSGlobalObject;
37
38namespace DFG {
39
40class DesiredGlobalProperty {
41public:
42 DesiredGlobalProperty() = default;
43
44 DesiredGlobalProperty(JSGlobalObject* globalObject, unsigned identifierNumber)
45 : m_globalObject(globalObject)
46 , m_identifierNumber(identifierNumber)
47 {
48 }
49
50 DesiredGlobalProperty(WTF::HashTableDeletedValueType)
51 : m_globalObject(nullptr)
52 , m_identifierNumber(UINT_MAX)
53 {
54 }
55
56 JSGlobalObject* globalObject() const { return m_globalObject; }
57 unsigned identifierNumber() const { return m_identifierNumber; }
58
59 bool operator==(const DesiredGlobalProperty& other) const
60 {
61 return m_globalObject == other.m_globalObject && m_identifierNumber == other.m_identifierNumber;
62 }
63
64 bool operator!=(const DesiredGlobalProperty& other) const
65 {
66 return !(*this == other);
67 }
68
69 bool isHashTableDeletedValue() const
70 {
71 return !m_globalObject && m_identifierNumber == UINT_MAX;
72 }
73
74 unsigned hash() const
75 {
76 return WTF::PtrHash<JSGlobalObject*>::hash(m_globalObject) + m_identifierNumber * 7;
77 }
78
79 void dumpInContext(PrintStream& out, DumpContext*) const
80 {
81 out.print(m_identifierNumber, " for ", RawPointer(m_globalObject));
82 }
83
84 void dump(PrintStream& out) const
85 {
86 dumpInContext(out, nullptr);
87 }
88
89private:
90 JSGlobalObject* m_globalObject { nullptr };
91 unsigned m_identifierNumber { 0 };
92};
93
94struct DesiredGlobalPropertyHash {
95 static unsigned hash(const DesiredGlobalProperty& key) { return key.hash(); }
96 static bool equal(const DesiredGlobalProperty& a, const DesiredGlobalProperty& b) { return a == b; }
97 static constexpr bool safeToCompareToEmptyOrDeleted = true;
98};
99
100} } // namespace JSC::DFG
101
102namespace WTF {
103
104template<typename T> struct DefaultHash;
105template<> struct DefaultHash<JSC::DFG::DesiredGlobalProperty> {
106 typedef JSC::DFG::DesiredGlobalPropertyHash Hash;
107};
108
109template<typename T> struct HashTraits;
110template<> struct HashTraits<JSC::DFG::DesiredGlobalProperty> : SimpleClassHashTraits<JSC::DFG::DesiredGlobalProperty> { };
111
112} // namespace WTF
113
114#endif // ENABLE(DFG_JIT)
115