1/*
2 * Copyright (C) 2013-2019 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 "ArrayBuffer.h"
29#include "JSObject.h"
30
31namespace JSC {
32
33class JSArrayBuffer final : public JSNonFinalObject {
34public:
35 using Base = JSNonFinalObject;
36 static constexpr unsigned StructureFlags = Base::StructureFlags;
37
38protected:
39 JSArrayBuffer(VM&, Structure*, RefPtr<ArrayBuffer>&&);
40 void finishCreation(VM&, JSGlobalObject*);
41
42public:
43 // This function will register the new wrapper with the vm's TypedArrayController.
44 JS_EXPORT_PRIVATE static JSArrayBuffer* create(VM&, Structure*, RefPtr<ArrayBuffer>&&);
45
46 ArrayBuffer* impl() const { return m_impl; }
47
48 static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
49
50 JS_EXPORT_PRIVATE bool isShared() const;
51 ArrayBufferSharingMode sharingMode() const;
52
53 DECLARE_EXPORT_INFO;
54
55 // This is the default DOM unwrapping. It calls toUnsharedArrayBuffer().
56 static ArrayBuffer* toWrapped(VM&, JSValue);
57
58protected:
59 static size_t estimatedSize(JSCell*, VM&);
60
61private:
62 ArrayBuffer* m_impl;
63};
64
65inline ArrayBuffer* toPossiblySharedArrayBuffer(VM& vm, JSValue value)
66{
67 JSArrayBuffer* wrapper = jsDynamicCast<JSArrayBuffer*>(vm, value);
68 if (!wrapper)
69 return nullptr;
70 return wrapper->impl();
71}
72
73inline ArrayBuffer* toUnsharedArrayBuffer(VM& vm, JSValue value)
74{
75 ArrayBuffer* result = toPossiblySharedArrayBuffer(vm, value);
76 if (!result || result->isShared())
77 return nullptr;
78 return result;
79}
80
81inline ArrayBuffer* JSArrayBuffer::toWrapped(VM& vm, JSValue value)
82{
83 return toUnsharedArrayBuffer(vm, value);
84}
85
86} // namespace JSC
87