public void AddPair(IntPtr keyPtr, IntPtr valuePtr)
{
IntPtr localKeyPropForCapture = keyProp;
IntPtr localValuePropForCapture = valueProp;
HashDelegates.GetKeyHash keyHash = delegate(IntPtr elementKey)
{
return(Native_UProperty.GetValueTypeHash(localKeyPropForCapture, elementKey));
};
HashDelegates.Equality keyEquality = delegate(IntPtr a, IntPtr b)
{
return(Native_UProperty.Identical(localKeyPropForCapture, a, b, 0));
};
HashDelegates.ConstructAndAssign keyConstructAndAssign = delegate(IntPtr newElementKey)
{
if (Native_UProperty.HasAnyPropertyFlags(localKeyPropForCapture, EPropertyFlags.ZeroConstructor))
{
FMemory.Memzero(newElementKey, Native_UProperty.GetSize(localKeyPropForCapture));
}
else
{
Native_UProperty.InitializeValue(localKeyPropForCapture, newElementKey);
}
Native_UProperty.CopySingleValue(localKeyPropForCapture, newElementKey, keyPtr);
};
HashDelegates.ConstructAndAssign valueConstructAndAssign = delegate(IntPtr newElementValue)
{
if (Native_UProperty.HasAnyPropertyFlags(localValuePropForCapture, EPropertyFlags.ZeroConstructor))
{
FMemory.Memzero(newElementValue, Native_UProperty.GetSize(localValuePropForCapture));
}
else
{
Native_UProperty.InitializeValue(localValuePropForCapture, newElementValue);
}
Native_UProperty.CopySingleValue(localValuePropForCapture, newElementValue, valuePtr);
};
HashDelegates.Assign valueAssign = delegate(IntPtr existingElementValue)
{
Native_UProperty.CopySingleValue(localValuePropForCapture, existingElementValue, valuePtr);
};
HashDelegates.Destruct keyDestruct = delegate(IntPtr elementKey)
{
if (!Native_UProperty.HasAnyPropertyFlags(localKeyPropForCapture, EPropertyFlags.IsPlainOldData | EPropertyFlags.NoDestructor))
{
Native_UProperty.DestroyValue(localKeyPropForCapture, elementKey);
}
};
HashDelegates.Destruct valueDestruct = delegate(IntPtr elementValue)
{
if (!Native_UProperty.HasAnyPropertyFlags(localValuePropForCapture, EPropertyFlags.IsPlainOldData | EPropertyFlags.NoDestructor))
{
Native_UProperty.DestroyValue(localValuePropForCapture, elementValue);
}
};
map->Add(keyPtr, valuePtr, ref mapLayout, keyHash, keyEquality, keyConstructAndAssign, valueConstructAndAssign,
valueAssign, keyDestruct, valueDestruct);
}
private FText()
{
ownsNativeAddress = true;
nativeAddress = FMemory.Malloc(FTextNative.StructSize);
FMemory.Memzero(nativeAddress, FTextNative.StructSize);
OwnsReference = true;// This assumes FText is initialized with a reference after this ctor
}
/// <summary>
/// Adds zeroed values to the end of the array (calls FMemory.Memzero on the memory range).
/// </summary>
/// <param name="count">The number of items to insert.</param>
/// <returns>the indnex of the first newly added item</returns>
public int AddZeroedValues(int count)
{
int oldNum = array->Add(elementSize, count);
IntPtr dest = GetRawPtr();
FMemory.Memzero(dest, count * elementSize);
return(oldNum);
}
public static unsafe void HackVTable(UObject obj)
{
// This will swap out the vtable entry and store the old one in our managed UClass
if (!Native_UObjectBaseUtility.IsA(obj.Address, Runtime.Classes.UClass))
{
UClass unrealClass = obj.GetClass();
if (unrealClass.VTableOriginalFunctions == null)
{
IntPtr *vtable = *(IntPtr **)obj.Address;
unrealClass.VTableOriginalFunctions = new Dictionary <int, UClass.VTableOriginalFunc>();
foreach (FunctionRedirect redirect in vtableRedirects)
{
if (!Native_UObjectBaseUtility.IsA(obj.Address, redirect.Class))
{
continue;
}
IntPtr originalFunctionAddress = vtable[redirect.VTableIndex];
if (originalFunctionAddress != redirect.NativeCallback)
{
IntPtr originalOwnerClassAddress = FindOriginalVTableOwner(
redirect.Class, unrealClass.Address, originalFunctionAddress, redirect.VTableIndex);
if (originalOwnerClassAddress != unrealClass.Address)
{
UClass originalOwnerClass = GCHelper.Find <UClass>(originalOwnerClassAddress);
if (originalOwnerClass.VTableOriginalFunctions == null)
{
HackVTable(originalOwnerClass.GetDefaultObject());
}
}
IntPtr pageAlignedPtr = FMemory.PageAlignPointer((IntPtr)(&vtable[redirect.VTableIndex]));
FMemory.PageProtect(pageAlignedPtr, (IntPtr)IntPtr.Size, true, true);
*(&vtable[redirect.VTableIndex]) = redirect.NativeCallback;
}
else
{
// The VTable has already been swapped out. Find the original function address.
UClass superClass = unrealClass;
while ((superClass = superClass.GetSuperClass()) != null && superClass.VTableOriginalFunctions == null)
{
}
Debug.Assert(superClass != null && superClass.VTableOriginalFunctions != null &&
superClass.VTableOriginalFunctions.ContainsKey(redirect.VTableIndex));
originalFunctionAddress = superClass.VTableOriginalFunctions[redirect.VTableIndex].FuncAddress;
}
unrealClass.VTableOriginalFunctions.Add(redirect.VTableIndex, new UClass.VTableOriginalFunc(originalFunctionAddress));
}
}
}
}
private unsafe void HandleInvokeFunctionFromNative(IntPtr obj, FFrame stack, IntPtr result,
UFunction.FuncInvokerManaged managedFunctionInvoker)
{
IntPtr function = stack.CurrentNativeFunction;
IntPtr paramsBuffer = stack.Locals;
if (managedFunctionInvoker != null)
{
// Call the managed function invoker which will marshal the params from the native params buffer and then call the
// target managed function
managedFunctionInvoker(paramsBuffer, obj);
}
// Copy out params back from the locals buffer
if (Native_UFunction.HasAnyFunctionFlags(function, EFunctionFlags.HasOutParms))
{
// This assumes that UProperty will be itterated in the exact same order as the caller created stack->OutParms
// (we could iterate stack->OutParms until nullptr but it isn't null terminated on release builds)
FOutParmRec *outParms = stack.OutParmsPtr;
foreach (IntPtr paramProp in new NativeReflection.NativeFieldIterator(Runtime.Classes.UProperty, function, false))
{
EPropertyFlags paramFlags = Native_UProperty.GetPropertyFlags(paramProp);
if ((paramFlags & EPropertyFlags.OutParm) == EPropertyFlags.OutParm &&
(paramFlags & EPropertyFlags.ConstParm) != EPropertyFlags.ConstParm)
{
Debug.Assert(outParms->Property == paramProp);
// - REMOVING the DestroyValue call. The issue with this DestroyValue call is that PropAddr
// and paramsBuffer can (will?) be refering to the same data which we should have set in
// managedFunctionInvoker. So a call to DestroyValue would be destroying the data we want!
// Though if PropAddr is for some reason still holding onto unknown memory this will leak
// memory and we will need to investigate further.
// - The "refering to the same data" is because of the params Memcpy in UObject::ProcessEvent.
// They wont have the same address but their inital data will be the same and as such
// things like FString data pointer would be pointing to the same address.
// - We may still need to call DestroyValue in the BP/VM code path above.
// Destroy the existing memory (this assumed the existing memory is valid or at least memzerod)
//Native_UProperty.DestroyValue(paramProp, outParms->PropAddr);
// A raw memcpy should be OK since the managed invoker should have set this memory appropriately.
FMemory.Memcpy(outParms->PropAddr,
paramsBuffer + Native_UProperty.GetOffset_ForUFunction(paramProp),
Native_UProperty.Get_ElementSize(paramProp));// Should be ArrayDim*ElementSize but ArrayDim should always be 1 for params
outParms = outParms->NextOutParamPtr;
}
}
}
// We assume that the caller will clean up the memory held by stack->Locals so we don't iterate over the
// DestructorLink as we do in HandleInvokeFunctionFromBP. HandleInvokeFunctionFromBP needs to as it creates
// copies of data when calling stack->Step() which don't occur here as we use the existing stack->Locals buffer.
}
internal void Initialize()
{
EnsureNotInitialized();
if (Address == IntPtr.Zero)
{
Address = FMemory.Malloc(NativeReflection.GetStructSize(structAddress));
Native_UStruct.InitializeStruct(structAddress, Address, 1);
}
initialized = true;
}
internal void Destroy()
{
if (Address != IntPtr.Zero)
{
Native_UStruct.DestroyStruct(structAddress, Address, 1);
if (selfAllocated)
{
FMemory.Free(Address);
}
Address = IntPtr.Zero;
initialized = false;
selfAllocated = false;
}
}
private void ClearItems(int index, int count)
{
IntPtr dest = GetRawPtr(index);
if (Native_UProperty.HasAnyPropertyFlags(innerProperty, EPropertyFlags.ZeroConstructor | EPropertyFlags.NoDestructor))
{
FMemory.Memzero(dest, count * elementSize);
}
else
{
for (int i = 0; i < count; i++, dest += elementSize)
{
Native_UProperty.ClearValue(innerProperty, dest);
}
}
}
public void Dispose(bool disposing)
{
if (!disposed)
{
if (OwnsReference)
{
nativeInstance->TextData.ReleaseSharedReference(espMode);
}
if (ownsNativeAddress && nativeAddress != IntPtr.Zero)
{
FMemory.Free(nativeAddress);
nativeAddress = IntPtr.Zero;
ownsNativeAddress = false;
}
disposed = true;
}
}
/// <summary>
/// Internal function to call into the property system to construct / initialize elements.
/// </summary>
/// <param name="index"First item to construct.></param>
private void ConstructItem(int index)
{
bool zeroElement = Native_UProperty.HasAnyPropertyFlags(elementProp, EPropertyFlags.ZeroConstructor);
IntPtr dest = GetElementPtrWithoutCheck(index);
if (zeroElement)
{
// If any nested property needs zeroing, just pre-zero the whole space
FMemory.Memzero(dest, setLayout.Size);
}
if (!zeroElement)
{
Native_UProperty.InitializeValue_InContainer(elementProp, dest);
}
}
public static unsafe void Unload()
{
foreach (FunctionRedirect redirect in vtableRedirects)
{
using (FStringUnsafe dummyNameUnsafe = new FStringUnsafe(redirect.DummyName))
{
Native_VTableHacks.Set_VTableCallback(ref dummyNameUnsafe.Array, IntPtr.Zero);
}
}
// Restore the old vtable entry on hotreload. This is important as otherwise we would lose the original function address
// which is stored in the managed UClass (which gets destroyed on hotreload)
foreach (IntPtr objAddress in new NativeReflection.NativeObjectIterator(Runtime.Classes.UObject, EObjectFlags.NoFlags))
{
foreach (FunctionRedirect redirect in vtableRedirects)
{
if (!Native_UObjectBaseUtility.IsA(objAddress, redirect.Class))
{
continue;
}
IntPtr *vtable = *(IntPtr **)objAddress;
if (vtable[redirect.VTableIndex] == redirect.NativeCallback)
{
UObject obj = GCHelper.Find(objAddress);
Debug.Assert(obj != null);
UClass unrealClass = obj.GetClass();
Debug.Assert(unrealClass != null);
UClass.VTableOriginalFunc originalFunc;
if (unrealClass.VTableOriginalFunctions != null &&
unrealClass.VTableOriginalFunctions.TryGetValue(redirect.VTableIndex, out originalFunc))
{
IntPtr pageAlignedPtr = FMemory.PageAlignPointer((IntPtr)(&vtable[redirect.VTableIndex]));
FMemory.PageProtect(pageAlignedPtr, (IntPtr)IntPtr.Size, true, true);
*(&vtable[redirect.VTableIndex]) = originalFunc.FuncAddress;
}
}
}
}
}
/// <summary>
/// Adds the element to the set, returning true if the element was added, or false if the element was already present
/// </summary>
public void AddElement(IntPtr elementToAdd)
{
IntPtr localElementPropForCapture = elementProp;
HashDelegates.GetKeyHash elementHash = delegate(IntPtr elementKey)
{
return(Native_UProperty.GetValueTypeHash(localElementPropForCapture, elementKey));
};
HashDelegates.Equality elementEquality = delegate(IntPtr a, IntPtr b)
{
return(Native_UProperty.Identical(localElementPropForCapture, a, b, 0));
};
HashDelegates.Construct elementConstruct = delegate(IntPtr newElement)
{
if (Native_UProperty.HasAnyPropertyFlags(localElementPropForCapture, EPropertyFlags.ZeroConstructor))
{
FMemory.Memzero(newElement, Native_UProperty.GetSize(localElementPropForCapture));
}
else
{
Native_UProperty.InitializeValue(localElementPropForCapture, newElement);
}
Native_UProperty.CopySingleValue(localElementPropForCapture, newElement, elementToAdd);
};
HashDelegates.Destruct elementDestruct = delegate(IntPtr element)
{
if (!Native_UProperty.HasAnyPropertyFlags(localElementPropForCapture, EPropertyFlags.IsPlainOldData | EPropertyFlags.NoDestructor))
{
Native_UProperty.DestroyValue(localElementPropForCapture, element);
}
};
set->Add(
elementToAdd,
ref setLayout,
elementHash,
elementEquality,
elementConstruct,
elementDestruct);
}
/// <summary>
/// Internal function to call into the property system to construct / initialize elements.
/// </summary>
/// <param name="index">First item to construct.</param>
private void ConstructItem(int index)
{
bool zeroKey = Native_UProperty.HasAnyPropertyFlags(keyProp, EPropertyFlags.ZeroConstructor);
bool zeroValue = Native_UProperty.HasAnyPropertyFlags(valueProp, EPropertyFlags.ZeroConstructor);
IntPtr dest = GetPairPtrWithoutCheck(index);
if (zeroKey || zeroValue)
{
// If any nested property needs zeroing, just pre-zero the whole space
FMemory.Memzero(dest, mapLayout.SetLayout.Size);
}
if (!zeroKey)
{
Native_UProperty.InitializeValue_InContainer(keyProp, dest);
}
if (!zeroValue)
{
Native_UProperty.InitializeValue_InContainer(valueProp, dest);
}
}
/// <summary>
/// Dynamically invokes the function
/// </summary>
/// <param name="obj"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public object DynamicInvoke(UObject obj, params object[] parameters)
{
if (parameters == null)
{
parameters = new object[0];
}
bool validParams = true;
Dictionary <UProperty, Delegate> fromNativeParams = new Dictionary <UProperty, Delegate>();
Dictionary <UProperty, Delegate> toNativeParams = new Dictionary <UProperty, Delegate>();
UProperty returnValueProp = null;
List <UProperty> paramProps = new List <UProperty>();
foreach (UProperty prop in GetProperties <UProperty>())
{
if (prop.HasAnyPropertyFlags(EPropertyFlags.Parm))
{
if (prop.HasAnyPropertyFlags(EPropertyFlags.ReturnParm))
{
returnValueProp = prop;
}
else
{
paramProps.Add(prop);
}
Type paramType = UProperty.GetTypeFromProperty(prop);
if (paramType == null)
{
validParams = false;
break;
}
Delegate fromNative = MarshalingDelegateResolverSlow.GetFromNative(paramType);
Delegate toNative = MarshalingDelegateResolverSlow.GetToNative(paramType);
if (fromNative == null || toNative == null)
{
validParams = false;
break;
}
fromNativeParams.Add(prop, fromNative);
toNativeParams.Add(prop, toNative);
}
}
if (parameters.Length != paramProps.Count)
{
validParams = false;
}
if (!validParams)
{
return(null);
}
// Sort the parameters by offset, this is assumingly the correct thing to do?
// - Otherwise we need to take the param names into this function. Or just not sort at all?
//paramProps.Sort((x, y) => x.GetOffset_ForUFunction().CompareTo(y.GetOffset_ForUFunction()));
object result = null;
unsafe
{
int paramsSize = ParmsSize;
byte * paramsBufferAllocation = stackalloc byte[ParmsSize];
IntPtr paramsBuffer = new IntPtr(paramsBufferAllocation);
FMemory.Memzero(paramsBuffer, paramsSize);
// Initialize default values for all parameters
foreach (UProperty prop in GetProperties <UProperty>())
{
if (prop.HasAnyPropertyFlags(EPropertyFlags.Parm))
{
Native.Native_UProperty.InitializeValue_InContainer(prop.Address, paramsBuffer);
}
}
// Copy the managed parameters to the buffer
for (int i = 0; i < parameters.Length; i++)
{
UProperty paramProp = paramProps[i];
object paramValue = parameters[i];
if (paramValue != null && (!paramProp.HasAnyPropertyFlags(EPropertyFlags.OutParm) ||
paramProp.HasAnyPropertyFlags(EPropertyFlags.ReferenceParm)))
{
toNativeParams[paramProp].DynamicInvoke(
paramsBuffer + paramProp.GetOffset_ForUFunction(), (int)0, paramProp.Address, paramValue);
}
}
// Invoke the function
NativeReflection.InvokeFunction(obj.Address, Address, paramsBuffer, paramsSize);
// Copy parameters / return value from the buffer
for (int i = 0; i < parameters.Length; i++)
{
UProperty paramProp = paramProps[i];
if (paramProp.HasAnyPropertyFlags(EPropertyFlags.OutParm))
{
parameters[i] = fromNativeParams[paramProp].DynamicInvoke(
paramsBuffer + paramProp.GetOffset_ForUFunction(), (int)0, paramProp.Address);
}
}
if (returnValueProp != null)
{
result = fromNativeParams[returnValueProp].DynamicInvoke(
paramsBuffer + returnValueProp.GetOffset_ForUFunction(), (int)0, returnValueProp.Address);
}
// Destroy the memory for all of the parameters
foreach (UProperty prop in GetProperties <UProperty>())
{
if (prop.HasAnyPropertyFlags(EPropertyFlags.Parm))
{
Native.Native_UProperty.DestroyValue_InContainer(prop.Address, paramsBuffer);
}
}
}
return(result);
}
private unsafe void HandleInvokeFunctionFromBP(IntPtr obj, FFrame *stack, IntPtr result,
UFunction.FuncInvokerManaged managedFunctionInvoker)
{
// NOTE: ScriptCore.cpp uses PropertiesSize instead of ParamsSize. Is it ever any different? (it says alignment
// may make them different) If it is different we should probably use PropertiesSize (including in generated code /
// IL) as ScriptCore.cpp uses a memcpy of our memory.
Debug.Assert(Native_UStruct.Get_PropertiesSize(stack->CurrentNativeFunction) ==
Native_UFunction.Get_ParmsSize(stack->CurrentNativeFunction));
IntPtr function = stack->CurrentNativeFunction;
int paramsSize = Native_UFunction.Get_ParmsSize(function);
int numParams = Native_UFunction.Get_NumParms(function);
bool hasOutParams = Native_UFunction.HasAnyFunctionFlags(function, EFunctionFlags.HasOutParms);
IntPtr *outParamsBufferPtr = stackalloc IntPtr[numParams];
byte * paramsBufferPtr = stackalloc byte[paramsSize];
IntPtr paramsBuffer = (IntPtr)paramsBufferPtr;
// We could skip this memzero as stackalloc will (always?) zero memory even though the spec states
// "The content of the newly allocated memory is undefined."
// https://github.com/dotnet/coreclr/issues/1279
FMemory.Memzero(paramsBuffer, paramsSize);
if (hasOutParams)
{
int paramIndex = 0;
foreach (IntPtr param in new NativeReflection.NativeFieldIterator(Runtime.Classes.UProperty, function, false))
{
// Not required but using for Debug.Assert() when getting the value
stack->MostRecentPropertyAddress = IntPtr.Zero;
stack->Step(stack->Object, paramsBuffer + Native_UProperty.GetOffset_ForUFunction(param));
outParamsBufferPtr[paramIndex] = stack->MostRecentPropertyAddress;
if (Native_UProperty.HasAnyPropertyFlags(param, EPropertyFlags.ReturnParm))
{
// This should be UObject::execEndFunctionParms which will just do "stack->Code--;" for allowing
// the caller to use PFINISH aftwards
outParamsBufferPtr[paramIndex] = result;
}
paramIndex++;
}
}
else
{
foreach (IntPtr param in new NativeReflection.NativeFieldIterator(Runtime.Classes.UProperty, function, false))
{
stack->Step(stack->Object, paramsBuffer + Native_UProperty.GetOffset_ForUFunction(param));
}
}
stack->PFinish();// Skip EX_EndFunctionParms
// Call the managed function invoker which will marshal the params from the native params buffer and then call the
// target managed function
managedFunctionInvoker(paramsBuffer, obj);
// Copy out params from the temp buffer
if (hasOutParams)
{
int paramIndex = 0;
foreach (IntPtr paramProp in new NativeReflection.NativeFieldIterator(Runtime.Classes.UProperty, function, false))
{
if (Native_UProperty.HasAnyPropertyFlags(paramProp, EPropertyFlags.OutParm))
{
Debug.Assert(outParamsBufferPtr[paramIndex] != IntPtr.Zero);
// - See "REMOVING the DestroyValue call" below.
// Destroy the existing memory (this assumed the existing memory is valid or at least memzerod)
//Native_UProperty.DestroyValue(paramProp, outParamsBufferPtr[paramIndex]);
// A raw memcpy should be OK since the managed invoker should have set this memory appropriately.
FMemory.Memcpy(outParamsBufferPtr[paramIndex],
paramsBuffer + Native_UProperty.GetOffset_ForUFunction(paramProp),
Native_UProperty.Get_ElementSize(paramProp));// Should be ArrayDim*ElementSize but ArrayDim should always be 1 for params
}
paramIndex++;
}
}
// Parameters are copied when calling stack->Step(). We are responsible for destroying non-blittable types
// which were copied (FString, TArray, etc). For C++ this works out well due to the copy constructors etc.
//
// Example where an FString is constructed from stack->Step():
// UObject::execStringConst(...) { *(FString*)RESULT_PARAM = (ANSICHAR*)Stack.Code; }
//
// For C# it might be better if we reimplemented all of the IMPLEMENT_VM_FUNCTION functions to reduce the amount
// of copying as we currently need ANOTHER copy to get it from the temp buffer into a C# type (which is done
// inside the managedFunctionInvoker function)
foreach (IntPtr paramProp in new NativeReflection.NativeFieldIterator(Runtime.Classes.UProperty, function,
EFieldIteratorType.Destructor, false))
{
// When is this ever false? It seems to be checked in UObject::ProcessEvent()
// "Destroy local variables except function parameters." - used for BP locals?
Debug.Assert(Native_UProperty.IsInContainer(paramProp, paramsSize));
// Out params are copied to the memory maintained by the caller so only destroy "by value" parameters.
if (!Native_UProperty.HasAnyPropertyFlags(paramProp, EPropertyFlags.OutParm))
{
Native_UProperty.DestroyValue_InContainer(paramProp, paramsBuffer);
}
}
}
/// <summary>
/// Checks if the given UScriptStruct address is POD and has a zero constructor (initializes to zero).
///
/// NOTE: A struct could be PlainOldData but unsafe to zero initialize due to having a non-zero constructor / EForceInit constructor.
/// </summary>
internal static bool IsPODZeroInit(IntPtr unrealStruct)
{
if (unrealStruct != IntPtr.Zero && Native_UObjectBaseUtility.IsA(unrealStruct, Classes.UScriptStruct))
{
EStructFlags structFlags = Native_UScriptStruct.Get_StructFlags(unrealStruct);
IntPtr cppStructOps = Native_UScriptStruct.GetCppStructOps(unrealStruct);
if (cppStructOps != IntPtr.Zero)
{
bool isPlainOldData = Native_ICppStructOps.IsPlainOldData(cppStructOps);
bool hasZeroConstructor = Native_ICppStructOps.HasZeroConstructor(cppStructOps);
bool hasNoopConstructor = Native_ICppStructOps.HasNoopConstructor(cppStructOps);
if (!hasZeroConstructor && structFlags.HasFlag(EStructFlags.ZeroConstructor))
{
// This struct flag could have been set in the zero constructor check in UScriptStruct::PrepareCppStructOps
hasZeroConstructor = true;
}
if (isPlainOldData && hasZeroConstructor && !hasNoopConstructor)
{
return(true);
}
if (isPlainOldData && !hasZeroConstructor)
{
if (hasNoopConstructor)
{
// The struct has a no-op constructor and takes EForceInit to init
return(false);
}
// This is a copy of a check made in UScriptStruct::PrepareCppStructOps to check if the struct constructs to zero
// if (CppStructOps->IsPlainOldData() && !CppStructOps->HasZeroConstructor()) { ... }
int size = Native_ICppStructOps.GetSize(cppStructOps);
IntPtr buffer = FMemory.Malloc(size);
FMemory.Memzero(buffer, size);
Native_ICppStructOps.Construct(cppStructOps, buffer);
Native_ICppStructOps.Construct(cppStructOps, buffer);// slightly more like to catch "internal counters" if we do this twice
bool isZeroConstruct = true;
unsafe
{
byte *bufferPtr = (byte *)buffer;
for (int i = 0; i < size; i++)
{
if (bufferPtr[i] != 0)
{
isZeroConstruct = false;
break;
}
}
}
FMemory.Free(buffer);
if (isZeroConstruct)
{
// "Native struct %s has DISCOVERED zero construction. Size = %d"
System.Diagnostics.Debugger.Break();
return(true);
}
}
return(false);
}
else
{
// Only treat it as blittable if it is POD and has a zero constructor
return(structFlags.HasFlag(EStructFlags.IsPlainOldData | EStructFlags.ZeroConstructor));
}
}
return(false);
}
private void ZeroMemory()
{
FMemory.Memzero(ref this);
}
internal void ZeroMemory()
{
FMemory.Memzero(ref this);
}
