1/*
2 * Copyright (C) 2013-2018 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#include "config.h"
27#include "JSArrayBuffer.h"
28
29#include "JSCInlines.h"
30#include "TypeError.h"
31#include "TypedArrayController.h"
32#include <wtf/Gigacage.h>
33
34namespace JSC {
35
36const ClassInfo JSArrayBuffer::s_info = {
37 "ArrayBuffer", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSArrayBuffer)};
38
39JSArrayBuffer::JSArrayBuffer(VM& vm, Structure* structure, RefPtr<ArrayBuffer>&& arrayBuffer)
40 : Base(vm, structure)
41 , m_impl(arrayBuffer.get())
42{
43}
44
45void JSArrayBuffer::finishCreation(VM& vm, JSGlobalObject* globalObject)
46{
47 Base::finishCreation(vm);
48 // This probably causes GCs in the various VMs to overcount the impact of the array buffer.
49 vm.heap.addReference(this, impl());
50 vm.m_typedArrayController->registerWrapper(globalObject, impl(), this);
51}
52
53JSArrayBuffer* JSArrayBuffer::create(
54 VM& vm, Structure* structure, RefPtr<ArrayBuffer>&& buffer)
55{
56 JSArrayBuffer* result =
57 new (NotNull, allocateCell<JSArrayBuffer>(vm.heap))
58 JSArrayBuffer(vm, structure, WTFMove(buffer));
59 result->finishCreation(vm, structure->globalObject());
60 return result;
61}
62
63Structure* JSArrayBuffer::createStructure(
64 VM& vm, JSGlobalObject* globalObject, JSValue prototype)
65{
66 return Structure::create(
67 vm, globalObject, prototype, TypeInfo(ArrayBufferType, StructureFlags), info(),
68 NonArray);
69}
70
71bool JSArrayBuffer::isShared() const
72{
73 return impl()->isShared();
74}
75
76ArrayBufferSharingMode JSArrayBuffer::sharingMode() const
77{
78 return impl()->sharingMode();
79}
80
81size_t JSArrayBuffer::estimatedSize(JSCell* cell, VM& vm)
82{
83 JSArrayBuffer* thisObject = jsCast<JSArrayBuffer*>(cell);
84 size_t bufferEstimatedSize = thisObject->impl()->gcSizeEstimateInBytes();
85 return Base::estimatedSize(cell, vm) + bufferEstimatedSize;
86}
87
88} // namespace JSC
89
90