1/*
2 * Copyright (C) 2018 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 "ExitingInlineKind.h"
29
30namespace WTF {
31class PrintStream;
32} // namespace WTF
33
34namespace JSC {
35
36class ExitFlag {
37public:
38 ExitFlag() { }
39
40 ExitFlag(bool value, ExitingInlineKind inlineKind)
41 {
42 if (!value)
43 return;
44
45 switch (inlineKind) {
46 case ExitFromAnyInlineKind:
47 m_bits = trueNotInlined | trueInlined;
48 break;
49 case ExitFromNotInlined:
50 m_bits = trueNotInlined;
51 break;
52 case ExitFromInlined:
53 m_bits = trueInlined;
54 break;
55 }
56 }
57
58 ExitFlag operator|(const ExitFlag& other) const
59 {
60 ExitFlag result;
61 result.m_bits = m_bits | other.m_bits;
62 return result;
63 }
64
65 ExitFlag& operator|=(const ExitFlag& other)
66 {
67 *this = *this | other;
68 return *this;
69 }
70
71 ExitFlag operator&(const ExitFlag& other) const
72 {
73 ExitFlag result;
74 result.m_bits = m_bits & other.m_bits;
75 return result;
76 }
77
78 ExitFlag& operator&=(const ExitFlag& other)
79 {
80 *this = *this & other;
81 return *this;
82 }
83
84 explicit operator bool() const
85 {
86 return !!m_bits;
87 }
88
89 bool isSet(ExitingInlineKind inlineKind) const
90 {
91 return !!(*this & ExitFlag(true, inlineKind));
92 }
93
94 void dump(WTF::PrintStream&) const;
95
96private:
97 static constexpr uint8_t trueNotInlined = 1;
98 static constexpr uint8_t trueInlined = 2;
99
100 uint8_t m_bits { 0 };
101};
102
103} // namespace JSC
104
105