VVMNativeStructInline.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#if WITH_VERSE_VM || defined(__INTELLISENSE__)
 
#include "VerseVM/VVMClass.h"
#include "VerseVM/VVMEmergentType.h"
#include "VerseVM/VVMNativeStruct.h"
#include "VerseVM/VVMObject.h"
 
namespace Verse
{
 
template <class CppStructType>
inline CppStructType& VNativeStruct::GetStruct()
{
    checkSlow(GetUScriptStruct(*GetEmergentType()) == StaticStruct<CppStructType>());
 
    return *BitCast<CppStructType*>(GetStruct());
}
 
inline void* VNativeStruct::GetStruct()
{
    return VObject::GetData(*GetEmergentType()->CppClassInfo);
}
 
inline UScriptStruct* VNativeStruct::GetUScriptStruct(VEmergentType& EmergentType)
{
    return EmergentType.Type->StaticCast<VClass>().GetUETypeChecked<UScriptStruct>();
}
 
template <class CppStructType>
inline VNativeStruct& VNativeStruct::New(FAllocationContext Context, VEmergentType& InEmergentType, CppStructType&& InStruct)
{
    UScriptStruct* ScriptStruct = GetUScriptStruct(InEmergentType);
    bool bHasDestructor = (ScriptStruct->StructFlags & STRUCT_NoDestructor) == 0;
    return *new (AllocateCell(Context, ScriptStruct->GetStructureSize(), bHasDestructor)) VNativeStruct(Context, InEmergentType, Forward<CppStructType>(InStruct));
}
 
inline VNativeStruct& VNativeStruct::NewUninitialized(FAllocationContext Context, VEmergentType& InEmergentType)
{
    UScriptStruct* ScriptStruct = GetUScriptStruct(InEmergentType);
    bool bHasDestructor = (ScriptStruct->StructFlags & STRUCT_NoDestructor) == 0;
    return *new (AllocateCell(Context, ScriptStruct->GetStructureSize(), bHasDestructor)) VNativeStruct(Context, InEmergentType);
}
 
inline std::byte* VNativeStruct::AllocateCell(FAllocationContext Context, size_t Size, bool bHasDestructor)
{
    const size_t ByteSize = DataOffset(StaticCppClassInfo) + Size;
    return bHasDestructor ? Context.Allocate(FHeap::DestructorSpace, ByteSize) : Context.AllocateFastCell(ByteSize);
}
 
template <class CppStructType>
inline VNativeStruct::VNativeStruct(FAllocationContext Context, VEmergentType& InEmergentType, CppStructType&& InStruct)
    : VObject(Context, InEmergentType)
{
    using StructType = typename TDecay<CppStructType>::Type;
    checkSlow(sizeof(StructType) == GetUScriptStruct(InEmergentType)->GetStructureSize());
 
    SetIsStruct();
    void* Data = GetData(*InEmergentType.CppClassInfo);
 
    // TODO: AutoRTFM::Close and propagate any errors.
    new (Data) StructType(Forward<CppStructType>(InStruct));
}
 
inline VNativeStruct::VNativeStruct(FAllocationContext Context, VEmergentType& InEmergentType)
    : VObject(Context, InEmergentType)
{
    SetIsStruct();
 
    UScriptStruct* ScriptStruct = GetUScriptStruct(InEmergentType);
 
    // TODO: AutoRTFM::Close and propagate any errors.
    ScriptStruct->InitializeStruct(GetData(*InEmergentType.CppClassInfo));
}
 
inline VNativeStruct::VNativeStruct(FAllocationContext Context)
    : VObject(Context, GlobalTrivialEmergentType.Get(Context))
{
    SetIsStruct();
}
 
inline VNativeStruct::~VNativeStruct()
{
    VEmergentType* EmergentType = GetEmergentType();
    UScriptStruct* ScriptStruct = GetUScriptStruct(*EmergentType);
 
    // TODO: AutoRTFM::Close and propagate any errors.
    ScriptStruct->DestroyStruct(VObject::GetData(*EmergentType->CppClassInfo));
}
 
} // namespace Verse
#endif // WITH_VERSE_VM