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/*
* Copyright (C) 2016-2024 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
#if ENABLE(WEBASSEMBLY)
#include "JSObject.h"
#include "WasmMemory.h"
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>
namespace JSC {
class ArrayBuffer;
class JSArrayBuffer;
// FIXME: Merge Wasm::Memory into this now that JSWebAssemblyInstance is the only instance object.
class JSWebAssemblyMemory final : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr DestructionMode needsDestruction = NeedsDestruction;
static void destroy(JSCell*);
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.webAssemblyMemorySpace<mode>();
}
JS_EXPORT_PRIVATE static JSWebAssemblyMemory* create(VM&, Structure*);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
JS_EXPORT_PRIVATE void adopt(Ref<Wasm::Memory>&&);
Wasm::Memory& memory() { return m_memory.get(); }
JSArrayBuffer* buffer(JSGlobalObject*);
PageCount grow(VM&, JSGlobalObject*, uint32_t delta);
JS_EXPORT_PRIVATE void growSuccessCallback(VM&, PageCount oldPageCount, PageCount newPageCount);
JSObject* type(JSGlobalObject*);
MemoryMode mode() const { return m_memory->mode(); }
MemorySharingMode sharingMode() const { return m_memory->sharingMode(); }
size_t mappedCapacity() const { return m_memory->mappedCapacity(); }
void* basePointer() const { return m_memory->basePointer(); }
static constexpr ptrdiff_t offsetOfMemory() { return OBJECT_OFFSETOF(JSWebAssemblyMemory, m_memory); }
private:
JSWebAssemblyMemory(VM&, Structure*);
void finishCreation(VM&);
DECLARE_VISIT_CHILDREN;
Ref<Wasm::Memory> m_memory;
WriteBarrier<JSArrayBuffer> m_bufferWrapper;
RefPtr<ArrayBuffer> m_buffer;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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