1/*
2 * Copyright (C) 2014-2018 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "VM.h"
29#include "WriteBarrier.h"
30
31namespace JSC {
32
33template <typename T, typename Traits>
34inline void WriteBarrierBase<T, Traits>::set(VM& vm, const JSCell* owner, T* value)
35{
36 ASSERT(value);
37 ASSERT(!Options::useConcurrentJIT() || !isCompilationThread());
38 validateCell(value);
39 setEarlyValue(vm, owner, value);
40}
41
42template <typename T, typename Traits>
43inline void WriteBarrierBase<T, Traits>::setMayBeNull(VM& vm, const JSCell* owner, T* value)
44{
45 if (value)
46 validateCell(value);
47 setEarlyValue(vm, owner, value);
48}
49
50template <typename T, typename Traits>
51inline void WriteBarrierBase<T, Traits>::setEarlyValue(VM& vm, const JSCell* owner, T* value)
52{
53 Traits::exchange(this->m_cell, value);
54 vm.heap.writeBarrier(owner, static_cast<JSCell*>(value));
55}
56
57inline void WriteBarrierBase<Unknown, DumbValueTraits<Unknown>>::set(VM& vm, const JSCell* owner, JSValue value)
58{
59 ASSERT(!Options::useConcurrentJIT() || !isCompilationThread());
60 m_value = JSValue::encode(value);
61 vm.heap.writeBarrier(owner, value);
62}
63
64} // namespace JSC
65