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/*
* Copyright (C) 2022-2025 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 "WasmTypeDefinitionInlines.h"
#include "WebAssemblyGCObjectBase.h"
#include <wtf/Ref.h>
#include <wtf/TrailingArray.h>
namespace JSC {
class JSWebAssemblyInstance;
class alignas(sizeof(uint64_t)) JSWebAssemblyStruct final : public WebAssemblyGCObjectBase, private TrailingArray<JSWebAssemblyStruct, uint8_t> {
public:
using Base = WebAssemblyGCObjectBase;
using TrailingArrayType = TrailingArray<JSWebAssemblyStruct, uint8_t>;
friend TrailingArrayType;
static_assert(StructureFlags == WebAssemblyGCObjectBase::StructureFlags, "WebAssemblyGCObjectBase must have the same StructureFlags as us");
template<typename CellType, SubspaceAccess mode>
static CompleteSubspace* subspaceFor(VM& vm)
{
return &vm.heap.cellSpace;
}
DECLARE_INFO;
static inline TypeInfoBlob typeInfoBlob();
static inline WebAssemblyGCStructure* createStructure(VM&, JSGlobalObject*, Ref<const Wasm::TypeDefinition>&&, Ref<const Wasm::RTT>&&);
static JSWebAssemblyStruct* tryCreate(VM&, WebAssemblyGCStructure*);
static JSWebAssemblyStruct* create(VM&, WebAssemblyGCStructure*);
DECLARE_VISIT_CHILDREN;
uint64_t get(uint32_t) const;
v128_t getVector(uint32_t) const;
void set(uint32_t, uint64_t);
void set(uint32_t, v128_t);
const Wasm::TypeDefinition& typeDefinition() const { return gcStructure()->typeDefinition(); }
const Wasm::StructType& structType() const { return *typeDefinition().as<Wasm::StructType>(); }
Wasm::FieldType fieldType(uint32_t fieldIndex) const { return structType().field(fieldIndex); }
uint8_t* fieldPointer(uint32_t fieldIndex) { return &at(structType().offsetOfFieldInPayload(fieldIndex)); }
const uint8_t* fieldPointer(uint32_t fieldIndex) const { return const_cast<JSWebAssemblyStruct*>(this)->fieldPointer(fieldIndex); }
using TrailingArrayType::offsetOfData;
using TrailingArrayType::offsetOfSize;
using TrailingArrayType::allocationSize;
protected:
JSWebAssemblyStruct(VM&, WebAssemblyGCStructure*);
DECLARE_DEFAULT_FINISH_CREATION;
};
TypeInfoBlob JSWebAssemblyStruct::typeInfoBlob()
{
return TypeInfoBlob(0, TypeInfo(WebAssemblyGCObjectType, StructureFlags));
}
WebAssemblyGCStructure* JSWebAssemblyStruct::createStructure(VM& vm, JSGlobalObject* globalObject, Ref<const Wasm::TypeDefinition>&& type, Ref<const Wasm::RTT>&& rtt)
{
RELEASE_ASSERT(rtt->kind() == Wasm::RTTKind::Struct);
RELEASE_ASSERT(type->is<Wasm::StructType>());
return WebAssemblyGCStructure::create(vm, globalObject, TypeInfo(WebAssemblyGCObjectType, StructureFlags), info(), WTFMove(type), WTFMove(rtt));
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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