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 "AllocationFailureMode.h"
29#include <climits>
30
31namespace JSC {
32
33class GCDeferralContext;
34class LocalAllocator;
35
36// This abstracts how we refer to LocalAllocator so that we could eventually support thread-local
37// caches.
38
39class Allocator {
40public:
41 Allocator() { }
42
43 explicit Allocator(LocalAllocator* localAllocator)
44 : m_localAllocator(localAllocator)
45 {
46 }
47
48 void* allocate(GCDeferralContext*, AllocationFailureMode) const;
49
50 unsigned cellSize() const;
51
52 LocalAllocator* localAllocator() const { return m_localAllocator; }
53
54 bool operator==(const Allocator& other) const { return m_localAllocator == other.localAllocator(); }
55 bool operator!=(const Allocator& other) const { return !(*this == other); }
56 explicit operator bool() const { return *this != Allocator(); }
57
58private:
59 LocalAllocator* m_localAllocator { nullptr };
60};
61
62} // namespace JSC
63
64