public static TIl2Cpp ConvertDelegate <TIl2Cpp>(Delegate @delegate) where TIl2Cpp : Il2CppObjectBase
{
if (@delegate == null)
{
return(null);
}
if (!typeof(Il2CppSystem.Delegate).IsAssignableFrom(typeof(TIl2Cpp)))
{
throw new ArgumentException($"{typeof(TIl2Cpp)} is not a delegate");
}
var managedInvokeMethod = @delegate.GetType().GetMethod("Invoke") !;
var parameterInfos = managedInvokeMethod.GetParameters();
foreach (var parameterInfo in parameterInfos)
{
var parameterType = parameterInfo.ParameterType;
if (parameterType.IsGenericParameter)
{
throw new ArgumentException($"Delegate has unsubstituted generic parameter ({parameterType}) which is not supported");
}
if (parameterType.BaseType == typeof(ValueType))
{
throw new ArgumentException($"Delegate has parameter of type {parameterType} (non-blittable struct) which is not supported");
}
}
var classTypePtr = Il2CppClassPointerStore <TIl2Cpp> .NativeClassPtr;
if (classTypePtr == IntPtr.Zero)
{
throw new ArgumentException($"Type {typeof(TIl2Cpp)} has uninitialized class pointer");
}
if (Il2CppClassPointerStore <Il2CppToMonoDelegateReference> .NativeClassPtr == IntPtr.Zero)
{
ClassInjector.RegisterTypeInIl2Cpp <Il2CppToMonoDelegateReference>();
}
var il2CppDelegateType = Il2CppSystem.Type.internal_from_handle(IL2CPP.il2cpp_class_get_type(classTypePtr));
var nativeDelegateInvokeMethod = il2CppDelegateType.GetMethod("Invoke");
var nativeParameters = nativeDelegateInvokeMethod.GetParameters();
if (nativeParameters.Count != parameterInfos.Length)
{
throw new ArgumentException($"Managed delegate has {parameterInfos.Length} parameters, native has {nativeParameters.Count}, these should match");
}
for (var i = 0; i < nativeParameters.Count; i++)
{
var nativeType = nativeParameters[i].ParameterType;
var managedType = parameterInfos[i].ParameterType;
if (nativeType.IsPrimitive || managedType.IsPrimitive)
{
if (nativeType.FullName != managedType.FullName)
{
throw new ArgumentException($"Parameter type mismatch at parameter {i}: {nativeType.FullName} != {managedType.FullName}");
}
continue;
}
var classPointerFromManagedType = (IntPtr)typeof(Il2CppClassPointerStore <>).MakeGenericType(managedType)
.GetField(nameof(Il2CppClassPointerStore <int> .NativeClassPtr)).GetValue(null);
var classPointerFromNativeType = IL2CPP.il2cpp_class_from_type(nativeType._impl.value);
if (classPointerFromManagedType != classPointerFromNativeType)
{
throw new ArgumentException($"Parameter type at {i} has mismatched native type pointers; types: {nativeType.FullName} != {managedType.FullName}");
}
if (nativeType.IsByRef || managedType.IsByRef)
{
throw new ArgumentException($"Parameter at {i} is passed by reference, this is not supported");
}
}
var signature = new MethodSignature(nativeDelegateInvokeMethod, true);
var managedTrampoline =
GetOrCreateNativeToManagedTrampoline(signature, nativeDelegateInvokeMethod, managedInvokeMethod);
var nativeDelegatePtr = IL2CPP.il2cpp_object_new(classTypePtr);
var converted = new Il2CppSystem.Delegate(nativeDelegatePtr);
converted.method_ptr = Marshal.GetFunctionPointerForDelegate(managedTrampoline);
converted.method_info = nativeDelegateInvokeMethod; // todo: is this truly a good hack?
var methodInfoSize = Marshal.SizeOf <Il2CppMethodInfo>();
var methodInfoPointer = Marshal.AllocHGlobal(methodInfoSize);
var methodInfo = (Il2CppMethodInfo *)methodInfoPointer;
*methodInfo = default; // zero out everything
converted.method = methodInfoPointer;
methodInfo->methodPointer = converted.method_ptr;
methodInfo->invoker_method = IntPtr.Zero;
methodInfo->parameters_count = (byte)parameterInfos.Length;
methodInfo->slot = ushort.MaxValue;
methodInfo->extra_flags = MethodInfoExtraFlags.is_marshalled_from_native;
converted.m_target = new Il2CppToMonoDelegateReference(@delegate, methodInfoPointer);
return(converted.Cast <TIl2Cpp>());
}
public static TIl2Cpp ConvertDelegate <TIl2Cpp>(Delegate @delegate) where TIl2Cpp : Il2CppObjectBase
{
if (@delegate == null)
{
return(null);
}
if (!typeof(Il2CppSystem.Delegate).IsAssignableFrom(typeof(TIl2Cpp)))
{
throw new ArgumentException($"{typeof(TIl2Cpp)} is not a delegate");
}
var managedInvokeMethod = @delegate.GetType().GetMethod("Invoke") !;
var parameterInfos = managedInvokeMethod.GetParameters();
foreach (var parameterInfo in parameterInfos)
{
var parameterType = parameterInfo.ParameterType;
if (parameterType.IsGenericParameter)
{
throw new ArgumentException($"Delegate has unsubstituted generic parameter ({parameterType}) which is not supported");
}
if (parameterType.BaseType == typeof(ValueType))
{
throw new ArgumentException($"Delegate has parameter of type {parameterType} (non-blittable struct) which is not supported");
}
}
var classTypePtr = Il2CppClassPointerStore <TIl2Cpp> .NativeClassPtr;
if (classTypePtr == IntPtr.Zero)
{
throw new ArgumentException($"Type {typeof(TIl2Cpp)} has uninitialized class pointer");
}
if (Il2CppClassPointerStore <Il2CppToMonoDelegateReference> .NativeClassPtr == IntPtr.Zero)
{
ClassInjector.RegisterTypeInIl2Cpp <Il2CppToMonoDelegateReference>();
}
var il2CppDelegateType = Il2CppSystem.Type.internal_from_handle(IL2CPP.il2cpp_class_get_type(classTypePtr));
var nativeDelegateInvokeMethod = il2CppDelegateType.GetMethod("Invoke");
var nativeParameters = nativeDelegateInvokeMethod.GetParameters();
if (nativeParameters.Count != parameterInfos.Length)
{
throw new ArgumentException($"Managed delegate has {parameterInfos.Length} parameters, native has {nativeParameters.Count}, these should match");
}
for (var i = 0; i < nativeParameters.Count; i++)
{
var nativeType = nativeParameters[i].ParameterType;
var managedType = parameterInfos[i].ParameterType;
if (nativeType.IsPrimitive || managedType.IsPrimitive)
{
if (nativeType.FullName != managedType.FullName)
{
throw new ArgumentException($"Parameter type mismatch at parameter {i}: {nativeType.FullName} != {managedType.FullName}");
}
continue;
}
var classPointerFromManagedType = (IntPtr)typeof(Il2CppClassPointerStore <>).MakeGenericType(managedType)
.GetField(nameof(Il2CppClassPointerStore <int> .NativeClassPtr)).GetValue(null);
var classPointerFromNativeType = IL2CPP.il2cpp_class_from_type(nativeType._impl.value);
if (classPointerFromManagedType != classPointerFromNativeType)
{
throw new ArgumentException($"Parameter type at {i} has mismatched native type pointers; types: {nativeType.FullName} != {managedType.FullName}");
}
if (nativeType.IsByRef || managedType.IsByRef)
{
throw new ArgumentException($"Parameter at {i} is passed by reference, this is not supported");
}
}
var signature = new MethodSignature(nativeDelegateInvokeMethod, true);
var managedTrampoline =
GetOrCreateNativeToManagedTrampoline(signature, nativeDelegateInvokeMethod, managedInvokeMethod);
var methodInfo = UnityVersionHandler.NewMethod();
methodInfo.MethodPointer = Marshal.GetFunctionPointerForDelegate(managedTrampoline);
methodInfo.ParametersCount = (byte)parameterInfos.Length;
methodInfo.Slot = ushort.MaxValue;
methodInfo.IsMarshalledFromNative = true;
var delegateReference = new Il2CppToMonoDelegateReference(@delegate, methodInfo.Pointer);
Il2CppSystem.Delegate converted;
if (UnityVersionHandler.MustUseDelegateConstructor)
{
converted = ((TIl2Cpp)Activator.CreateInstance(typeof(TIl2Cpp), delegateReference.Cast <Object>(), methodInfo.Pointer)).Cast <Il2CppSystem.Delegate>();
}
else
{
var nativeDelegatePtr = IL2CPP.il2cpp_object_new(classTypePtr);
converted = new Il2CppSystem.Delegate(nativeDelegatePtr);
}
converted.method_ptr = methodInfo.MethodPointer;
converted.method_info = nativeDelegateInvokeMethod; // todo: is this truly a good hack?
converted.method = methodInfo.Pointer;
converted.m_target = delegateReference;
if (UnityVersionHandler.MustUseDelegateConstructor)
{ // U2021.2.0+ hack in case the constructor did the wrong thing anyway
converted.invoke_impl = converted.method_ptr;
converted.method_code = converted.m_target.Pointer;
}
return(converted.Cast <TIl2Cpp>());
}