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/*
* Copyright (C) 2013-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ArrayBuffer.h"
#include "JSObject.h"
namespace JSC {
class JSArrayBuffer final : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr unsigned StructureFlags = Base::StructureFlags;
template<typename CellType, SubspaceAccess mode>
static IsoSubspace* subspaceFor(VM& vm)
{
return vm.arrayBufferSpace<mode>();
}
// This function will register the new wrapper with the vm's TypedArrayController.
JS_EXPORT_PRIVATE static JSArrayBuffer* create(VM&, Structure*, RefPtr<ArrayBuffer>&&);
ArrayBuffer* impl() const { return m_impl; }
static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
JS_EXPORT_PRIVATE bool isShared() const;
ArrayBufferSharingMode sharingMode() const;
DECLARE_EXPORT_INFO;
// This is the default DOM unwrapping. It calls toUnsharedArrayBuffer().
static ArrayBuffer* toWrapped(VM&, JSValue);
static ArrayBuffer* toWrappedAllowShared(VM&, JSValue);
private:
JSArrayBuffer(VM&, Structure*, RefPtr<ArrayBuffer>&&);
void finishCreation(VM&, JSGlobalObject*);
static size_t estimatedSize(JSCell*, VM&);
ArrayBuffer* m_impl;
};
inline ArrayBuffer* toPossiblySharedArrayBuffer(VM& vm, JSValue value)
{
JSArrayBuffer* wrapper = jsDynamicCast<JSArrayBuffer*>(vm, value);
if (!wrapper)
return nullptr;
return wrapper->impl();
}
inline ArrayBuffer* toUnsharedArrayBuffer(VM& vm, JSValue value)
{
ArrayBuffer* result = toPossiblySharedArrayBuffer(vm, value);
if (!result || result->isShared())
return nullptr;
return result;
}
inline ArrayBuffer* JSArrayBuffer::toWrapped(VM& vm, JSValue value)
{
return toUnsharedArrayBuffer(vm, value);
}
inline ArrayBuffer* JSArrayBuffer::toWrappedAllowShared(VM& vm, JSValue value)
{
return toPossiblySharedArrayBuffer(vm, value);
}
} // namespace JSC