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 "Allocator.h"
29
30namespace JSC {
31
32class JITAllocator {
33public:
34 enum Kind {
35 Constant,
36 Variable
37 };
38
39 JITAllocator() { }
40
41 static JITAllocator constant(Allocator allocator)
42 {
43 JITAllocator result;
44 result.m_kind = Constant;
45 result.m_allocator = allocator;
46 return result;
47 }
48
49 static JITAllocator variable()
50 {
51 JITAllocator result;
52 result.m_kind = Variable;
53 return result;
54 }
55
56 bool operator==(const JITAllocator& other) const
57 {
58 return m_kind == other.m_kind
59 && m_allocator == other.m_allocator;
60 }
61
62 bool operator!=(const JITAllocator& other) const
63 {
64 return !(*this == other);
65 }
66
67 explicit operator bool() const
68 {
69 return *this != JITAllocator();
70 }
71
72 Kind kind() const { return m_kind; }
73 bool isConstant() const { return m_kind == Constant; }
74 bool isVariable() const { return m_kind == Variable; }
75
76 Allocator allocator() const
77 {
78 RELEASE_ASSERT(isConstant());
79 return m_allocator;
80 }
81
82private:
83 Kind m_kind { Constant };
84 Allocator m_allocator;
85};
86
87} // namespace JSC
88
89