Merge pull request #37050 from neikeq/fix-mono-after-vulkan-merge

Fix C# bindings after recent breaking changes

14 files changed, 516 insertions, 157 deletions

diff --git a/modules/mono/mono_gd/gd_mono.h b/modules/mono/mono_gd/gd_mono.h
index 8f489e8d8d..9528c64f8d 100644
--- a/modules/mono/mono_gd/gd_mono.h
+++ b/modules/mono/mono_gd/gd_mono.h
@@ -203,7 +203,7 @@ public:
 
 	static GDMono *get_singleton() { return singleton; }
 
-	GD_NORETURN static void unhandled_exception_hook(MonoObject *p_exc, void *p_user_data);
+	[[noreturn]] static void unhandled_exception_hook(MonoObject *p_exc, void *p_user_data);
 
 	UnhandledExceptionPolicy get_unhandled_exception_policy() const { return unhandled_exception_policy; }
 
diff --git a/modules/mono/mono_gd/gd_mono_assembly.cpp b/modules/mono/mono_gd/gd_mono_assembly.cpp
index 6cf5377e2c..57b7653a00 100644
--- a/modules/mono/mono_gd/gd_mono_assembly.cpp
+++ b/modules/mono/mono_gd/gd_mono_assembly.cpp
@@ -148,7 +148,7 @@ MonoAssembly *GDMonoAssembly::_search_hook(MonoAssemblyName *aname, void *user_d
 	return res ? res->get_assembly() : NULL;
 }
 
-static _THREAD_LOCAL_(MonoImage *) image_corlib_loading = NULL;
+static thread_local MonoImage *image_corlib_loading = NULL;
 
 MonoAssembly *GDMonoAssembly::_preload_hook(MonoAssemblyName *aname, char **, void *user_data, bool refonly) {
 
diff --git a/modules/mono/mono_gd/gd_mono_cache.cpp b/modules/mono/mono_gd/gd_mono_cache.cpp
index 0ad90a510e..7a3234b69b 100644
--- a/modules/mono/mono_gd/gd_mono_cache.cpp
+++ b/modules/mono/mono_gd/gd_mono_cache.cpp
@@ -112,6 +112,7 @@ void CachedData::clear_godot_api_cache() {
 	class_AABB = NULL;
 	class_Color = NULL;
 	class_Plane = NULL;
+	class_StringName = NULL;
 	class_NodePath = NULL;
 	class_RID = NULL;
 	class_GodotObject = NULL;
@@ -120,6 +121,8 @@ void CachedData::clear_godot_api_cache() {
 	class_Control = NULL;
 	class_Spatial = NULL;
 	class_WeakRef = NULL;
+	class_Callable = NULL;
+	class_SignalInfo = NULL;
 	class_Array = NULL;
 	class_Dictionary = NULL;
 	class_MarshalUtils = NULL;
@@ -145,6 +148,7 @@ void CachedData::clear_godot_api_cache() {
 	field_GodotMethodAttribute_methodName = NULL;
 
 	field_GodotObject_ptr = NULL;
+	field_StringName_ptr = NULL;
 	field_NodePath_ptr = NULL;
 	field_Image_ptr = NULL;
 	field_RID_ptr = NULL;
@@ -153,9 +157,13 @@ void CachedData::clear_godot_api_cache() {
 	methodthunk_Array_GetPtr.nullify();
 	methodthunk_Dictionary_GetPtr.nullify();
 	methodthunk_SignalAwaiter_SignalCallback.nullify();
-	methodthunk_SignalAwaiter_FailureCallback.nullify();
 	methodthunk_GodotTaskScheduler_Activate.nullify();
 
+	methodthunk_Delegate_Equals.nullify();
+
+	methodthunk_DelegateUtils_TrySerializeDelegate.nullify();
+	methodthunk_DelegateUtils_TryDeserializeDelegate.nullify();
+
 	// Start of MarshalUtils methods
 
 	methodthunk_MarshalUtils_TypeIsGenericArray.nullify();
@@ -211,6 +219,8 @@ void update_corlib_cache() {
 	CACHE_METHOD_AND_CHECK(System_Diagnostics_StackTrace, ctor_Exception_bool, CACHED_CLASS(System_Diagnostics_StackTrace)->get_method_with_desc("System.Diagnostics.StackTrace:.ctor(System.Exception,bool)", true));
 #endif
 
+	CACHE_METHOD_THUNK_AND_CHECK(Delegate, Equals, GDMono::get_singleton()->get_corlib_assembly()->get_class("System", "Delegate")->get_method_with_desc("System.Delegate:Equals(object)", 1));
+
 	CACHE_CLASS_AND_CHECK(KeyNotFoundException, GDMono::get_singleton()->get_corlib_assembly()->get_class("System.Collections.Generic", "KeyNotFoundException"));
 
 	cached_data.corlib_cache_updated = true;
@@ -228,6 +238,7 @@ void update_godot_api_cache() {
 	CACHE_CLASS_AND_CHECK(AABB, GODOT_API_CLASS(AABB));
 	CACHE_CLASS_AND_CHECK(Color, GODOT_API_CLASS(Color));
 	CACHE_CLASS_AND_CHECK(Plane, GODOT_API_CLASS(Plane));
+	CACHE_CLASS_AND_CHECK(StringName, GODOT_API_CLASS(StringName));
 	CACHE_CLASS_AND_CHECK(NodePath, GODOT_API_CLASS(NodePath));
 	CACHE_CLASS_AND_CHECK(RID, GODOT_API_CLASS(RID));
 	CACHE_CLASS_AND_CHECK(GodotObject, GODOT_API_CLASS(Object));
@@ -236,6 +247,8 @@ void update_godot_api_cache() {
 	CACHE_CLASS_AND_CHECK(Control, GODOT_API_CLASS(Control));
 	CACHE_CLASS_AND_CHECK(Spatial, GODOT_API_CLASS(Spatial));
 	CACHE_CLASS_AND_CHECK(WeakRef, GODOT_API_CLASS(WeakRef));
+	CACHE_CLASS_AND_CHECK(Callable, GODOT_API_CLASS(Callable));
+	CACHE_CLASS_AND_CHECK(SignalInfo, GODOT_API_CLASS(SignalInfo));
 	CACHE_CLASS_AND_CHECK(Array, GODOT_API_NS_CLASS(BINDINGS_NAMESPACE_COLLECTIONS, Array));
 	CACHE_CLASS_AND_CHECK(Dictionary, GODOT_API_NS_CLASS(BINDINGS_NAMESPACE_COLLECTIONS, Dictionary));
 	CACHE_CLASS_AND_CHECK(MarshalUtils, GODOT_API_CLASS(MarshalUtils));
@@ -261,6 +274,7 @@ void update_godot_api_cache() {
 	CACHE_FIELD_AND_CHECK(GodotMethodAttribute, methodName, CACHED_CLASS(GodotMethodAttribute)->get_field("methodName"));
 
 	CACHE_FIELD_AND_CHECK(GodotObject, ptr, CACHED_CLASS(GodotObject)->get_field(BINDINGS_PTR_FIELD));
+	CACHE_FIELD_AND_CHECK(StringName, ptr, CACHED_CLASS(StringName)->get_field(BINDINGS_PTR_FIELD));
 	CACHE_FIELD_AND_CHECK(NodePath, ptr, CACHED_CLASS(NodePath)->get_field(BINDINGS_PTR_FIELD));
 	CACHE_FIELD_AND_CHECK(RID, ptr, CACHED_CLASS(RID)->get_field(BINDINGS_PTR_FIELD));
 
@@ -268,9 +282,11 @@ void update_godot_api_cache() {
 	CACHE_METHOD_THUNK_AND_CHECK(Array, GetPtr, GODOT_API_NS_CLASS(BINDINGS_NAMESPACE_COLLECTIONS, Array)->get_method("GetPtr", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(Dictionary, GetPtr, GODOT_API_NS_CLASS(BINDINGS_NAMESPACE_COLLECTIONS, Dictionary)->get_method("GetPtr", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(SignalAwaiter, SignalCallback, GODOT_API_CLASS(SignalAwaiter)->get_method("SignalCallback", 1));
-	CACHE_METHOD_THUNK_AND_CHECK(SignalAwaiter, FailureCallback, GODOT_API_CLASS(SignalAwaiter)->get_method("FailureCallback", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(GodotTaskScheduler, Activate, GODOT_API_CLASS(GodotTaskScheduler)->get_method("Activate", 0));
 
+	CACHE_METHOD_THUNK_AND_CHECK(DelegateUtils, TrySerializeDelegate, GODOT_API_CLASS(DelegateUtils)->get_method("TrySerializeDelegate", 2));
+	CACHE_METHOD_THUNK_AND_CHECK(DelegateUtils, TryDeserializeDelegate, GODOT_API_CLASS(DelegateUtils)->get_method("TryDeserializeDelegate", 2));
+
 	// Start of MarshalUtils methods
 
 	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, TypeIsGenericArray, GODOT_API_CLASS(MarshalUtils)->get_method("TypeIsGenericArray", 1));
diff --git a/modules/mono/mono_gd/gd_mono_cache.h b/modules/mono/mono_gd/gd_mono_cache.h
index 0458e91240..74a8d445c6 100644
--- a/modules/mono/mono_gd/gd_mono_cache.h
+++ b/modules/mono/mono_gd/gd_mono_cache.h
@@ -82,6 +82,7 @@ struct CachedData {
 	GDMonoClass *class_AABB;
 	GDMonoClass *class_Color;
 	GDMonoClass *class_Plane;
+	GDMonoClass *class_StringName;
 	GDMonoClass *class_NodePath;
 	GDMonoClass *class_RID;
 	GDMonoClass *class_GodotObject;
@@ -90,6 +91,8 @@ struct CachedData {
 	GDMonoClass *class_Control;
 	GDMonoClass *class_Spatial;
 	GDMonoClass *class_WeakRef;
+	GDMonoClass *class_Callable;
+	GDMonoClass *class_SignalInfo;
 	GDMonoClass *class_Array;
 	GDMonoClass *class_Dictionary;
 	GDMonoClass *class_MarshalUtils;
@@ -115,6 +118,7 @@ struct CachedData {
 	GDMonoField *field_GodotMethodAttribute_methodName;
 
 	GDMonoField *field_GodotObject_ptr;
+	GDMonoField *field_StringName_ptr;
 	GDMonoField *field_NodePath_ptr;
 	GDMonoField *field_Image_ptr;
 	GDMonoField *field_RID_ptr;
@@ -123,9 +127,13 @@ struct CachedData {
 	GDMonoMethodThunkR<Array *, MonoObject *> methodthunk_Array_GetPtr;
 	GDMonoMethodThunkR<Dictionary *, MonoObject *> methodthunk_Dictionary_GetPtr;
 	GDMonoMethodThunk<MonoObject *, MonoArray *> methodthunk_SignalAwaiter_SignalCallback;
-	GDMonoMethodThunk<MonoObject *> methodthunk_SignalAwaiter_FailureCallback;
 	GDMonoMethodThunk<MonoObject *> methodthunk_GodotTaskScheduler_Activate;
 
+	GDMonoMethodThunkR<MonoBoolean, MonoObject *, MonoObject *> methodthunk_Delegate_Equals;
+
+	GDMonoMethodThunkR<MonoBoolean, MonoDelegate *, MonoObject *> methodthunk_DelegateUtils_TrySerializeDelegate;
+	GDMonoMethodThunkR<MonoBoolean, MonoObject *, MonoDelegate **> methodthunk_DelegateUtils_TryDeserializeDelegate;
+
 	// Start of MarshalUtils methods
 
 	GDMonoMethodThunkR<MonoBoolean, MonoReflectionType *> methodthunk_MarshalUtils_TypeIsGenericArray;
@@ -193,10 +201,4 @@ _FORCE_INLINE_ bool tools_godot_api_check() {
 #define CACHED_METHOD_THUNK(m_class, m_method) (GDMonoCache::cached_data.methodthunk_##m_class##_##m_method)
 #define CACHED_PROPERTY(m_class, m_property) (GDMonoCache::cached_data.property_##m_class##_##m_property)
 
-#ifdef REAL_T_IS_DOUBLE
-#define REAL_T_MONOCLASS CACHED_CLASS_RAW(double)
-#else
-#define REAL_T_MONOCLASS CACHED_CLASS_RAW(float)
-#endif
-
 #endif // GD_MONO_CACHE_H
diff --git a/modules/mono/mono_gd/gd_mono_field.cpp b/modules/mono/mono_gd/gd_mono_field.cpp
index 03b56c9949..76d781cc4d 100644
--- a/modules/mono/mono_gd/gd_mono_field.cpp
+++ b/modules/mono/mono_gd/gd_mono_field.cpp
@@ -37,6 +37,10 @@
 #include "gd_mono_marshal.h"
 #include "gd_mono_utils.h"
 
+void GDMonoField::set_value(MonoObject *p_object, MonoObject *p_value) {
+	mono_field_set_value(p_object, mono_field, p_value);
+}
+
 void GDMonoField::set_value_raw(MonoObject *p_object, void *p_ptr) {
 	mono_field_set_value(p_object, mono_field, &p_ptr);
 }
@@ -173,6 +177,18 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				break;
 			}
 
+			if (tclass == CACHED_CLASS(Callable)) {
+				GDMonoMarshal::M_Callable val = GDMonoMarshal::callable_to_managed(p_value.operator Callable());
+				mono_field_set_value(p_object, mono_field, &val);
+				break;
+			}
+
+			if (tclass == CACHED_CLASS(SignalInfo)) {
+				GDMonoMarshal::M_SignalInfo val = GDMonoMarshal::signal_info_to_managed(p_value.operator Signal());
+				mono_field_set_value(p_object, mono_field, &val);
+				break;
+			}
+
 			if (mono_class_is_enum(tclass->get_mono_ptr())) {
 				MonoType *enum_basetype = mono_class_enum_basetype(tclass->get_mono_ptr());
 				switch (mono_type_get_type(enum_basetype)) {
@@ -256,11 +272,21 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				break;
 			}
 
-			if (array_type->eklass == REAL_T_MONOCLASS) {
+			if (array_type->eklass == CACHED_CLASS_RAW(int64_t)) {
+				SET_FROM_ARRAY(PackedInt64Array);
+				break;
+			}
+
+			if (array_type->eklass == CACHED_CLASS_RAW(float)) {
 				SET_FROM_ARRAY(PackedFloat32Array);
 				break;
 			}
 
+			if (array_type->eklass == CACHED_CLASS_RAW(double)) {
+				SET_FROM_ARRAY(PackedFloat64Array);
+				break;
+			}
+
 			if (array_type->eklass == CACHED_CLASS_RAW(String)) {
 				SET_FROM_ARRAY(PackedStringArray);
 				break;
@@ -294,6 +320,12 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				break;
 			}
 
+			if (CACHED_CLASS(StringName) == type_class) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator StringName());
+				mono_field_set_value(p_object, mono_field, managed);
+				break;
+			}
+
 			if (CACHED_CLASS(NodePath) == type_class) {
 				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator NodePath());
 				mono_field_set_value(p_object, mono_field, managed);
@@ -413,6 +445,10 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				case Variant::COLOR: {
 					SET_FROM_STRUCT(Color);
 				} break;
+				case Variant::STRING_NAME: {
+					MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator StringName());
+					mono_field_set_value(p_object, mono_field, managed);
+				} break;
 				case Variant::NODE_PATH: {
 					MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator NodePath());
 					mono_field_set_value(p_object, mono_field, managed);
@@ -424,8 +460,15 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				case Variant::OBJECT: {
 					MonoObject *managed = GDMonoUtils::unmanaged_get_managed(p_value.operator Object *());
 					mono_field_set_value(p_object, mono_field, managed);
-					break;
-				}
+				} break;
+				case Variant::CALLABLE: {
+					GDMonoMarshal::M_Callable val = GDMonoMarshal::callable_to_managed(p_value.operator Callable());
+					mono_field_set_value(p_object, mono_field, &val);
+				} break;
+				case Variant::SIGNAL: {
+					GDMonoMarshal::M_SignalInfo val = GDMonoMarshal::signal_info_to_managed(p_value.operator Signal());
+					mono_field_set_value(p_object, mono_field, &val);
+				} break;
 				case Variant::DICTIONARY: {
 					MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator Dictionary(), CACHED_CLASS(Dictionary));
 					mono_field_set_value(p_object, mono_field, managed);
@@ -440,9 +483,15 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				case Variant::PACKED_INT32_ARRAY: {
 					SET_FROM_ARRAY(PackedInt32Array);
 				} break;
+				case Variant::PACKED_INT64_ARRAY: {
+					SET_FROM_ARRAY(PackedInt64Array);
+				} break;
 				case Variant::PACKED_FLOAT32_ARRAY: {
 					SET_FROM_ARRAY(PackedFloat32Array);
 				} break;
+				case Variant::PACKED_FLOAT64_ARRAY: {
+					SET_FROM_ARRAY(PackedFloat64Array);
+				} break;
 				case Variant::PACKED_STRING_ARRAY: {
 					SET_FROM_ARRAY(PackedStringArray);
 				} break;
diff --git a/modules/mono/mono_gd/gd_mono_field.h b/modules/mono/mono_gd/gd_mono_field.h
index 76ee0963c4..61f2c8f071 100644
--- a/modules/mono/mono_gd/gd_mono_field.h
+++ b/modules/mono/mono_gd/gd_mono_field.h
@@ -47,21 +47,22 @@ class GDMonoField : public IMonoClassMember {
 	MonoCustomAttrInfo *attributes;
 
 public:
-	virtual GDMonoClass *get_enclosing_class() const GD_FINAL { return owner; }
+	virtual GDMonoClass *get_enclosing_class() const final { return owner; }
 
-	virtual MemberType get_member_type() const GD_FINAL { return MEMBER_TYPE_FIELD; }
+	virtual MemberType get_member_type() const final { return MEMBER_TYPE_FIELD; }
 
-	virtual StringName get_name() const GD_FINAL { return name; }
+	virtual StringName get_name() const final { return name; }
 
-	virtual bool is_static() GD_FINAL;
-	virtual Visibility get_visibility() GD_FINAL;
+	virtual bool is_static() final;
+	virtual Visibility get_visibility() final;
 
-	virtual bool has_attribute(GDMonoClass *p_attr_class) GD_FINAL;
-	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) GD_FINAL;
+	virtual bool has_attribute(GDMonoClass *p_attr_class) final;
+	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) final;
 	void fetch_attributes();
 
 	_FORCE_INLINE_ ManagedType get_type() const { return type; }
 
+	void set_value(MonoObject *p_object, MonoObject *p_value);
 	void set_value_raw(MonoObject *p_object, void *p_ptr);
 	void set_value_from_variant(MonoObject *p_object, const Variant &p_value);
 
diff --git a/modules/mono/mono_gd/gd_mono_internals.cpp b/modules/mono/mono_gd/gd_mono_internals.cpp
index b179b484f3..f343a1d646 100644
--- a/modules/mono/mono_gd/gd_mono_internals.cpp
+++ b/modules/mono/mono_gd/gd_mono_internals.cpp
@@ -33,7 +33,6 @@
 #include "../csharp_script.h"
 #include "../mono_gc_handle.h"
 #include "../utils/macros.h"
-#include "../utils/thread_local.h"
 #include "gd_mono_class.h"
 #include "gd_mono_marshal.h"
 #include "gd_mono_utils.h"
@@ -108,9 +107,11 @@ void tie_managed_to_unmanaged(MonoObject *managed, Object *unmanaged) {
 
 	CRASH_COND(script.is_null());
 
-	ScriptInstance *si = CSharpInstance::create_for_managed_type(unmanaged, script.ptr(), gchandle);
+	CSharpInstance *csharp_instance = CSharpInstance::create_for_managed_type(unmanaged, script.ptr(), gchandle);
 
-	unmanaged->set_script_and_instance(script, si);
+	unmanaged->set_script_and_instance(script, csharp_instance);
+
+	csharp_instance->connect_event_signals();
 }
 
 void unhandled_exception(MonoException *p_exc) {
diff --git a/modules/mono/mono_gd/gd_mono_marshal.cpp b/modules/mono/mono_gd/gd_mono_marshal.cpp
index 695be64d6e..f937e09eaf 100644
--- a/modules/mono/mono_gd/gd_mono_marshal.cpp
+++ b/modules/mono/mono_gd/gd_mono_marshal.cpp
@@ -30,13 +30,14 @@
 
 #include "gd_mono_marshal.h"
 
+#include "../signal_awaiter_utils.h"
 #include "gd_mono.h"
 #include "gd_mono_cache.h"
 #include "gd_mono_class.h"
 
 namespace GDMonoMarshal {
 
-Variant::Type managed_to_variant_type(const ManagedType &p_type) {
+Variant::Type managed_to_variant_type(const ManagedType &p_type, bool *r_nil_is_variant) {
 	switch (p_type.type_encoding) {
 		case MONO_TYPE_BOOLEAN:
 			return Variant::BOOL;
@@ -101,6 +102,12 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 			if (vtclass == CACHED_CLASS(Plane))
 				return Variant::PLANE;
 
+			if (vtclass == CACHED_CLASS(Callable))
+				return Variant::CALLABLE;
+
+			if (vtclass == CACHED_CLASS(SignalInfo))
+				return Variant::SIGNAL;
+
 			if (mono_class_is_enum(vtclass->get_mono_ptr()))
 				return Variant::INT;
 		} break;
@@ -118,9 +125,15 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
 				return Variant::PACKED_INT32_ARRAY;
 
-			if (array_type->eklass == REAL_T_MONOCLASS)
+			if (array_type->eklass == CACHED_CLASS_RAW(int64_t))
+				return Variant::PACKED_INT64_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(float))
 				return Variant::PACKED_FLOAT32_ARRAY;
 
+			if (array_type->eklass == CACHED_CLASS_RAW(double))
+				return Variant::PACKED_FLOAT64_ARRAY;
+
 			if (array_type->eklass == CACHED_CLASS_RAW(String))
 				return Variant::PACKED_STRING_ARRAY;
 
@@ -142,6 +155,10 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 				return Variant::OBJECT;
 			}
 
+			if (CACHED_CLASS(StringName) == type_class) {
+				return Variant::STRING_NAME;
+			}
+
 			if (CACHED_CLASS(NodePath) == type_class) {
 				return Variant::NODE_PATH;
 			}
@@ -179,6 +196,12 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 			}
 		} break;
 
+		case MONO_TYPE_OBJECT: {
+			if (r_nil_is_variant)
+				*r_nil_is_variant = true;
+			return Variant::NIL;
+		} break;
+
 		case MONO_TYPE_GENERICINST: {
 			MonoReflectionType *reftype = mono_type_get_object(mono_domain_get(), p_type.type_class->get_mono_type());
 
@@ -211,6 +234,9 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 		} break;
 	}
 
+	if (r_nil_is_variant)
+		*r_nil_is_variant = false;
+
 	// Unknown
 	return Variant::NIL;
 }
@@ -432,6 +458,16 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 				return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Plane), &from);
 			}
 
+			if (vtclass == CACHED_CLASS(Callable)) {
+				GDMonoMarshal::M_Callable from = GDMonoMarshal::callable_to_managed(p_var->operator Callable());
+				return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Callable), &from);
+			}
+
+			if (vtclass == CACHED_CLASS(SignalInfo)) {
+				GDMonoMarshal::M_SignalInfo from = GDMonoMarshal::signal_info_to_managed(p_var->operator Signal());
+				return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(SignalInfo), &from);
+			}
+
 			if (mono_class_is_enum(vtclass->get_mono_ptr())) {
 				MonoType *enum_basetype = mono_class_enum_basetype(vtclass->get_mono_ptr());
 				MonoClass *enum_baseclass = mono_class_from_mono_type(enum_basetype);
@@ -496,9 +532,15 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
 				return (MonoObject *)PackedInt32Array_to_mono_array(p_var->operator PackedInt32Array());
 
-			if (array_type->eklass == REAL_T_MONOCLASS)
+			if (array_type->eklass == CACHED_CLASS_RAW(int64_t))
+				return (MonoObject *)PackedInt64Array_to_mono_array(p_var->operator PackedInt64Array());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(float))
 				return (MonoObject *)PackedFloat32Array_to_mono_array(p_var->operator PackedFloat32Array());
 
+			if (array_type->eklass == CACHED_CLASS_RAW(double))
+				return (MonoObject *)PackedFloat64Array_to_mono_array(p_var->operator PackedFloat64Array());
+
 			if (array_type->eklass == CACHED_CLASS_RAW(String))
 				return (MonoObject *)PackedStringArray_to_mono_array(p_var->operator PackedStringArray());
 
@@ -522,6 +564,10 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 				return GDMonoUtils::unmanaged_get_managed(p_var->operator Object *());
 			}
 
+			if (CACHED_CLASS(StringName) == type_class) {
+				return GDMonoUtils::create_managed_from(p_var->operator StringName());
+			}
+
 			if (CACHED_CLASS(NodePath) == type_class) {
 				return GDMonoUtils::create_managed_from(p_var->operator NodePath());
 			}
@@ -628,12 +674,22 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 					GDMonoMarshal::M_Color from = MARSHALLED_OUT(Color, p_var->operator ::Color());
 					return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Color), &from);
 				}
+				case Variant::STRING_NAME:
+					return GDMonoUtils::create_managed_from(p_var->operator StringName());
 				case Variant::NODE_PATH:
 					return GDMonoUtils::create_managed_from(p_var->operator NodePath());
 				case Variant::_RID:
 					return GDMonoUtils::create_managed_from(p_var->operator RID());
 				case Variant::OBJECT:
 					return GDMonoUtils::unmanaged_get_managed(p_var->operator Object *());
+				case Variant::CALLABLE: {
+					GDMonoMarshal::M_Callable from = GDMonoMarshal::callable_to_managed(p_var->operator Callable());
+					return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Callable), &from);
+				}
+				case Variant::SIGNAL: {
+					GDMonoMarshal::M_SignalInfo from = GDMonoMarshal::signal_info_to_managed(p_var->operator Signal());
+					return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(SignalInfo), &from);
+				}
 				case Variant::DICTIONARY:
 					return GDMonoUtils::create_managed_from(p_var->operator Dictionary(), CACHED_CLASS(Dictionary));
 				case Variant::ARRAY:
@@ -642,8 +698,12 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 					return (MonoObject *)PackedByteArray_to_mono_array(p_var->operator PackedByteArray());
 				case Variant::PACKED_INT32_ARRAY:
 					return (MonoObject *)PackedInt32Array_to_mono_array(p_var->operator PackedInt32Array());
+				case Variant::PACKED_INT64_ARRAY:
+					return (MonoObject *)PackedInt64Array_to_mono_array(p_var->operator PackedInt64Array());
 				case Variant::PACKED_FLOAT32_ARRAY:
 					return (MonoObject *)PackedFloat32Array_to_mono_array(p_var->operator PackedFloat32Array());
+				case Variant::PACKED_FLOAT64_ARRAY:
+					return (MonoObject *)PackedFloat64Array_to_mono_array(p_var->operator PackedFloat64Array());
 				case Variant::PACKED_STRING_ARRAY:
 					return (MonoObject *)PackedStringArray_to_mono_array(p_var->operator PackedStringArray());
 				case Variant::PACKED_VECTOR2_ARRAY:
@@ -744,34 +804,40 @@ Variant mono_object_to_variant_impl(MonoObject *p_obj, const ManagedType &p_type
 			GDMonoClass *vtclass = p_type.type_class;
 
 			if (vtclass == CACHED_CLASS(Vector2))
-				return MARSHALLED_IN(Vector2, (GDMonoMarshal::M_Vector2 *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Vector2, unbox_addr<GDMonoMarshal::M_Vector2>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Rect2))
-				return MARSHALLED_IN(Rect2, (GDMonoMarshal::M_Rect2 *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Rect2, unbox_addr<GDMonoMarshal::M_Rect2>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Transform2D))
-				return MARSHALLED_IN(Transform2D, (GDMonoMarshal::M_Transform2D *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Transform2D, unbox_addr<GDMonoMarshal::M_Transform2D>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Vector3))
-				return MARSHALLED_IN(Vector3, (GDMonoMarshal::M_Vector3 *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Vector3, unbox_addr<GDMonoMarshal::M_Vector3>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Basis))
-				return MARSHALLED_IN(Basis, (GDMonoMarshal::M_Basis *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Basis, unbox_addr<GDMonoMarshal::M_Basis>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Quat))
-				return MARSHALLED_IN(Quat, (GDMonoMarshal::M_Quat *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Quat, unbox_addr<GDMonoMarshal::M_Quat>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Transform))
-				return MARSHALLED_IN(Transform, (GDMonoMarshal::M_Transform *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Transform, unbox_addr<GDMonoMarshal::M_Transform>(p_obj));
 
 			if (vtclass == CACHED_CLASS(AABB))
-				return MARSHALLED_IN(AABB, (GDMonoMarshal::M_AABB *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(AABB, unbox_addr<GDMonoMarshal::M_AABB>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Color))
-				return MARSHALLED_IN(Color, (GDMonoMarshal::M_Color *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Color, unbox_addr<GDMonoMarshal::M_Color>(p_obj));
 
 			if (vtclass == CACHED_CLASS(Plane))
-				return MARSHALLED_IN(Plane, (GDMonoMarshal::M_Plane *)mono_object_unbox(p_obj));
+				return MARSHALLED_IN(Plane, unbox_addr<GDMonoMarshal::M_Plane>(p_obj));
+
+			if (vtclass == CACHED_CLASS(Callable))
+				return managed_to_callable(unbox<GDMonoMarshal::M_Callable>(p_obj));
+
+			if (vtclass == CACHED_CLASS(SignalInfo))
+				return managed_to_signal_info(unbox<GDMonoMarshal::M_SignalInfo>(p_obj));
 
 			if (mono_class_is_enum(vtclass->get_mono_ptr()))
 				return unbox<int32_t>(p_obj);
@@ -790,9 +856,15 @@ Variant mono_object_to_variant_impl(MonoObject *p_obj, const ManagedType &p_type
 			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
 				return mono_array_to_PackedInt32Array((MonoArray *)p_obj);
 
-			if (array_type->eklass == REAL_T_MONOCLASS)
+			if (array_type->eklass == CACHED_CLASS_RAW(int64_t))
+				return mono_array_to_PackedInt64Array((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(float))
 				return mono_array_to_PackedFloat32Array((MonoArray *)p_obj);
 
+			if (array_type->eklass == CACHED_CLASS_RAW(double))
+				return mono_array_to_PackedFloat64Array((MonoArray *)p_obj);
+
 			if (array_type->eklass == CACHED_CLASS_RAW(String))
 				return mono_array_to_PackedStringArray((MonoArray *)p_obj);
 
@@ -825,6 +897,11 @@ Variant mono_object_to_variant_impl(MonoObject *p_obj, const ManagedType &p_type
 				return Variant();
 			}
 
+			if (CACHED_CLASS(StringName) == type_class) {
+				StringName *ptr = unbox<StringName *>(CACHED_FIELD(StringName, ptr)->get_value(p_obj));
+				return ptr ? Variant(*ptr) : Variant();
+			}
+
 			if (CACHED_CLASS(NodePath) == type_class) {
 				NodePath *ptr = unbox<NodePath *>(CACHED_FIELD(NodePath, ptr)->get_value(p_obj));
 				return ptr ? Variant(*ptr) : Variant();
@@ -960,9 +1037,10 @@ String mono_object_to_variant_string(MonoObject *p_obj, MonoException **r_exc) {
 }
 
 MonoArray *Array_to_mono_array(const Array &p_array) {
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), p_array.size());
+	int length = p_array.size();
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
+	for (int i = 0; i < length; i++) {
 		MonoObject *boxed = variant_to_mono_object(p_array[i]);
 		mono_array_setref(ret, i, boxed);
 	}
@@ -985,16 +1063,14 @@ Array mono_array_to_Array(MonoArray *p_array) {
 	return ret;
 }
 
-// TODO: Use memcpy where possible
-
 MonoArray *PackedInt32Array_to_mono_array(const PackedInt32Array &p_array) {
-	const int *r = p_array.ptr();
+	const int32_t *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(int32_t), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(int32_t), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		mono_array_set(ret, int32_t, i, r[i]);
-	}
+	int32_t *dst = (int32_t *)mono_array_addr(ret, int32_t, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
@@ -1005,23 +1081,48 @@ PackedInt32Array mono_array_to_PackedInt32Array(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	int *w = ret.ptrw();
+	int32_t *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = mono_array_get(p_array, int32_t, i);
-	}
+	const int32_t *src = (const int32_t *)mono_array_addr(p_array, int32_t, 0);
+	memcpy(dst, src, length);
+
+	return ret;
+}
+
+MonoArray *PackedInt64Array_to_mono_array(const PackedInt64Array &p_array) {
+	const int64_t *src = p_array.ptr();
+	int length = p_array.size();
+
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(int64_t), length);
+
+	int64_t *dst = (int64_t *)mono_array_addr(ret, int64_t, 0);
+	memcpy(dst, src, length);
+
+	return ret;
+}
+
+PackedInt64Array mono_array_to_PackedInt64Array(MonoArray *p_array) {
+	PackedInt64Array ret;
+	if (!p_array)
+		return ret;
+	int length = mono_array_length(p_array);
+	ret.resize(length);
+	int64_t *dst = ret.ptrw();
+
+	const int64_t *src = (const int64_t *)mono_array_addr(p_array, int64_t, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
 
 MonoArray *PackedByteArray_to_mono_array(const PackedByteArray &p_array) {
-	const uint8_t *r = p_array.ptr();
+	const uint8_t *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(uint8_t), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(uint8_t), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		mono_array_set(ret, uint8_t, i, r[i]);
-	}
+	uint8_t *dst = (uint8_t *)mono_array_addr(ret, uint8_t, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
@@ -1032,23 +1133,22 @@ PackedByteArray mono_array_to_PackedByteArray(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	uint8_t *w = ret.ptrw();
+	uint8_t *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = mono_array_get(p_array, uint8_t, i);
-	}
+	const uint8_t *src = (const uint8_t *)mono_array_addr(p_array, uint8_t, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
 
 MonoArray *PackedFloat32Array_to_mono_array(const PackedFloat32Array &p_array) {
-	const real_t *r = p_array.ptr();
+	const float *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), REAL_T_MONOCLASS, p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(float), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		mono_array_set(ret, real_t, i, r[i]);
-	}
+	float *dst = (float *)mono_array_addr(ret, float, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
@@ -1059,21 +1159,47 @@ PackedFloat32Array mono_array_to_PackedFloat32Array(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	real_t *w = ret.ptrw();
+	float *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = mono_array_get(p_array, real_t, i);
-	}
+	const float *src = (const float *)mono_array_addr(p_array, float, 0);
+	memcpy(dst, src, length);
+
+	return ret;
+}
+
+MonoArray *PackedFloat64Array_to_mono_array(const PackedFloat64Array &p_array) {
+	const double *src = p_array.ptr();
+	int length = p_array.size();
+
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(double), length);
+
+	double *dst = (double *)mono_array_addr(ret, double, 0);
+	memcpy(dst, src, length);
+
+	return ret;
+}
+
+PackedFloat64Array mono_array_to_PackedFloat64Array(MonoArray *p_array) {
+	PackedFloat64Array ret;
+	if (!p_array)
+		return ret;
+	int length = mono_array_length(p_array);
+	ret.resize(length);
+	double *dst = ret.ptrw();
+
+	const double *src = (const double *)mono_array_addr(p_array, double, 0);
+	memcpy(dst, src, length);
 
 	return ret;
 }
 
 MonoArray *PackedStringArray_to_mono_array(const PackedStringArray &p_array) {
 	const String *r = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(String), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(String), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
+	for (int i = 0; i < length; i++) {
 		MonoString *boxed = mono_string_from_godot(r[i]);
 		mono_array_setref(ret, i, boxed);
 	}
@@ -1098,13 +1224,19 @@ PackedStringArray mono_array_to_PackedStringArray(MonoArray *p_array) {
 }
 
 MonoArray *PackedColorArray_to_mono_array(const PackedColorArray &p_array) {
-	const Color *r = p_array.ptr();
+	const Color *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Color), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Color), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		M_Color *raw = (M_Color *)mono_array_addr_with_size(ret, sizeof(M_Color), i);
-		*raw = MARSHALLED_OUT(Color, r[i]);
+	if constexpr (InteropLayout::MATCHES_Color) {
+		Color *dst = (Color *)mono_array_addr(ret, Color, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			M_Color *raw = (M_Color *)mono_array_addr_with_size(ret, sizeof(M_Color), i);
+			*raw = MARSHALLED_OUT(Color, src[i]);
+		}
 	}
 
 	return ret;
@@ -1116,23 +1248,34 @@ PackedColorArray mono_array_to_PackedColorArray(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	Color *w = ret.ptrw();
+	Color *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = MARSHALLED_IN(Color, (M_Color *)mono_array_addr_with_size(p_array, sizeof(M_Color), i));
+	if constexpr (InteropLayout::MATCHES_Color) {
+		const Color *src = (const Color *)mono_array_addr(p_array, Color, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			dst[i] = MARSHALLED_IN(Color, (M_Color *)mono_array_addr_with_size(p_array, sizeof(M_Color), i));
+		}
 	}
 
 	return ret;
 }
 
 MonoArray *PackedVector2Array_to_mono_array(const PackedVector2Array &p_array) {
-	const Vector2 *r = p_array.ptr();
+	const Vector2 *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector2), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector2), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		M_Vector2 *raw = (M_Vector2 *)mono_array_addr_with_size(ret, sizeof(M_Vector2), i);
-		*raw = MARSHALLED_OUT(Vector2, r[i]);
+	if constexpr (InteropLayout::MATCHES_Vector2) {
+		Vector2 *dst = (Vector2 *)mono_array_addr(ret, Vector2, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			M_Vector2 *raw = (M_Vector2 *)mono_array_addr_with_size(ret, sizeof(M_Vector2), i);
+			*raw = MARSHALLED_OUT(Vector2, src[i]);
+		}
 	}
 
 	return ret;
@@ -1144,23 +1287,34 @@ PackedVector2Array mono_array_to_PackedVector2Array(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	Vector2 *w = ret.ptrw();
+	Vector2 *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = MARSHALLED_IN(Vector2, (M_Vector2 *)mono_array_addr_with_size(p_array, sizeof(M_Vector2), i));
+	if constexpr (InteropLayout::MATCHES_Vector2) {
+		const Vector2 *src = (const Vector2 *)mono_array_addr(p_array, Vector2, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			dst[i] = MARSHALLED_IN(Vector2, (M_Vector2 *)mono_array_addr_with_size(p_array, sizeof(M_Vector2), i));
+		}
 	}
 
 	return ret;
 }
 
 MonoArray *PackedVector3Array_to_mono_array(const PackedVector3Array &p_array) {
-	const Vector3 *r = p_array.ptr();
+	const Vector3 *src = p_array.ptr();
+	int length = p_array.size();
 
-	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector3), p_array.size());
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector3), length);
 
-	for (int i = 0; i < p_array.size(); i++) {
-		M_Vector3 *raw = (M_Vector3 *)mono_array_addr_with_size(ret, sizeof(M_Vector3), i);
-		*raw = MARSHALLED_OUT(Vector3, r[i]);
+	if constexpr (InteropLayout::MATCHES_Vector3) {
+		Vector3 *dst = (Vector3 *)mono_array_addr(ret, Vector3, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			M_Vector3 *raw = (M_Vector3 *)mono_array_addr_with_size(ret, sizeof(M_Vector3), i);
+			*raw = MARSHALLED_OUT(Vector3, src[i]);
+		}
 	}
 
 	return ret;
@@ -1172,13 +1326,85 @@ PackedVector3Array mono_array_to_PackedVector3Array(MonoArray *p_array) {
 		return ret;
 	int length = mono_array_length(p_array);
 	ret.resize(length);
-	Vector3 *w = ret.ptrw();
+	Vector3 *dst = ret.ptrw();
 
-	for (int i = 0; i < length; i++) {
-		w[i] = MARSHALLED_IN(Vector3, (M_Vector3 *)mono_array_addr_with_size(p_array, sizeof(M_Vector3), i));
+	if constexpr (InteropLayout::MATCHES_Vector3) {
+		const Vector3 *src = (const Vector3 *)mono_array_addr(p_array, Vector3, 0);
+		memcpy(dst, src, length);
+	} else {
+		for (int i = 0; i < length; i++) {
+			dst[i] = MARSHALLED_IN(Vector3, (M_Vector3 *)mono_array_addr_with_size(p_array, sizeof(M_Vector3), i));
+		}
 	}
 
 	return ret;
 }
 
+Callable managed_to_callable(const M_Callable &p_managed_callable) {
+	if (p_managed_callable.delegate) {
+		// TODO: Use pooling for ManagedCallable instances.
+		CallableCustom *managed_callable = memnew(ManagedCallable(p_managed_callable.delegate));
+		return Callable(managed_callable);
+	} else {
+		Object *target = p_managed_callable.target ?
+								 unbox<Object *>(CACHED_FIELD(GodotObject, ptr)->get_value(p_managed_callable.target)) :
+								 NULL;
+		StringName *method_ptr = unbox<StringName *>(CACHED_FIELD(StringName, ptr)->get_value(p_managed_callable.method_string_name));
+		StringName method = method_ptr ? *method_ptr : StringName();
+		return Callable(target, method);
+	}
+}
+
+M_Callable callable_to_managed(const Callable &p_callable) {
+	if (p_callable.is_custom()) {
+		CallableCustom *custom = p_callable.get_custom();
+		CallableCustom::CompareEqualFunc compare_equal_func = custom->get_compare_equal_func();
+
+		if (compare_equal_func == ManagedCallable::compare_equal_func_ptr) {
+			ManagedCallable *managed_callable = static_cast<ManagedCallable *>(custom);
+			return {
+				NULL, NULL,
+				managed_callable->get_delegate()
+			};
+		} else if (compare_equal_func == SignalAwaiterCallable::compare_equal_func_ptr) {
+			SignalAwaiterCallable *signal_awaiter_callable = static_cast<SignalAwaiterCallable *>(custom);
+			return {
+				GDMonoUtils::unmanaged_get_managed(ObjectDB::get_instance(signal_awaiter_callable->get_object())),
+				GDMonoUtils::create_managed_from(signal_awaiter_callable->get_signal()),
+				NULL
+			};
+		} else if (compare_equal_func == EventSignalCallable::compare_equal_func_ptr) {
+			EventSignalCallable *event_signal_callable = static_cast<EventSignalCallable *>(custom);
+			return {
+				GDMonoUtils::unmanaged_get_managed(ObjectDB::get_instance(event_signal_callable->get_object())),
+				GDMonoUtils::create_managed_from(event_signal_callable->get_signal()),
+				NULL
+			};
+		}
+
+		// Some other CallableCustom. We only support ManagedCallable.
+		return { NULL, NULL, NULL };
+	} else {
+		MonoObject *target_managed = GDMonoUtils::unmanaged_get_managed(p_callable.get_object());
+		MonoObject *method_string_name_managed = GDMonoUtils::create_managed_from(p_callable.get_method());
+		return { target_managed, method_string_name_managed, NULL };
+	}
+}
+
+Signal managed_to_signal_info(const M_SignalInfo &p_managed_signal) {
+	Object *owner = p_managed_signal.owner ?
+							unbox<Object *>(CACHED_FIELD(GodotObject, ptr)->get_value(p_managed_signal.owner)) :
+							NULL;
+	StringName *name_ptr = unbox<StringName *>(CACHED_FIELD(StringName, ptr)->get_value(p_managed_signal.name_string_name));
+	StringName name = name_ptr ? *name_ptr : StringName();
+	return Signal(owner, name);
+}
+
+M_SignalInfo signal_info_to_managed(const Signal &p_signal) {
+	Object *owner = p_signal.get_object();
+	MonoObject *owner_managed = GDMonoUtils::unmanaged_get_managed(owner);
+	MonoObject *name_string_name_managed = GDMonoUtils::create_managed_from(p_signal.get_name());
+	return { owner_managed, name_string_name_managed };
+}
+
 } // namespace GDMonoMarshal
diff --git a/modules/mono/mono_gd/gd_mono_marshal.h b/modules/mono/mono_gd/gd_mono_marshal.h
index 5db59522ce..54ce588baa 100644
--- a/modules/mono/mono_gd/gd_mono_marshal.h
+++ b/modules/mono/mono_gd/gd_mono_marshal.h
@@ -33,6 +33,7 @@
 
 #include "core/variant.h"
 
+#include "../managed_callable.h"
 #include "gd_mono.h"
 #include "gd_mono_utils.h"
 
@@ -62,7 +63,7 @@ T *unbox_addr(MonoObject *p_obj) {
 #define BOX_PTR(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(IntPtr), x)
 #define BOX_ENUM(m_enum_class, x) mono_value_box(mono_domain_get(), m_enum_class, &x)
 
-Variant::Type managed_to_variant_type(const ManagedType &p_type);
+Variant::Type managed_to_variant_type(const ManagedType &p_type, bool *r_nil_is_variant = NULL);
 
 bool try_get_array_element_type(const ManagedType &p_array_type, ManagedType &r_elem_type);
 bool try_get_dictionary_key_value_types(const ManagedType &p_dictionary_type, ManagedType &r_key_type, ManagedType &r_value_type);
@@ -132,6 +133,11 @@ Array mono_array_to_Array(MonoArray *p_array);
 MonoArray *PackedInt32Array_to_mono_array(const PackedInt32Array &p_array);
 PackedInt32Array mono_array_to_PackedInt32Array(MonoArray *p_array);
 
+// PackedInt64Array
+
+MonoArray *PackedInt64Array_to_mono_array(const PackedInt64Array &p_array);
+PackedInt64Array mono_array_to_PackedInt64Array(MonoArray *p_array);
+
 // PackedByteArray
 
 MonoArray *PackedByteArray_to_mono_array(const PackedByteArray &p_array);
@@ -142,6 +148,11 @@ PackedByteArray mono_array_to_PackedByteArray(MonoArray *p_array);
 MonoArray *PackedFloat32Array_to_mono_array(const PackedFloat32Array &p_array);
 PackedFloat32Array mono_array_to_PackedFloat32Array(MonoArray *p_array);
 
+// PackedFloat64Array
+
+MonoArray *PackedFloat64Array_to_mono_array(const PackedFloat64Array &p_array);
+PackedFloat64Array mono_array_to_PackedFloat64Array(MonoArray *p_array);
+
 // PackedStringArray
 
 MonoArray *PackedStringArray_to_mono_array(const PackedStringArray &p_array);
@@ -162,6 +173,29 @@ PackedVector2Array mono_array_to_PackedVector2Array(MonoArray *p_array);
 MonoArray *PackedVector3Array_to_mono_array(const PackedVector3Array &p_array);
 PackedVector3Array mono_array_to_PackedVector3Array(MonoArray *p_array);
 
+#pragma pack(push, 1)
+
+struct M_Callable {
+	MonoObject *target;
+	MonoObject *method_string_name;
+	MonoDelegate *delegate;
+};
+
+struct M_SignalInfo {
+	MonoObject *owner;
+	MonoObject *name_string_name;
+};
+
+#pragma pack(pop)
+
+// Callable
+Callable managed_to_callable(const M_Callable &p_managed_callable);
+M_Callable callable_to_managed(const Callable &p_callable);
+
+// SignalInfo
+Signal managed_to_signal_info(const M_SignalInfo &p_managed_signal);
+M_SignalInfo signal_info_to_managed(const Signal &p_signal);
+
 // Structures
 
 namespace InteropLayout {
@@ -222,8 +256,8 @@ enum {
 // In the future we may force this if we want to ref return these structs
 #ifdef GD_MONO_FORCE_INTEROP_STRUCT_COPY
 /* clang-format off */
-GD_STATIC_ASSERT(MATCHES_Vector2 && MATCHES_Rect2 && MATCHES_Transform2D && MATCHES_Vector3 &&
-				MATCHES_Basis && MATCHES_Quat && MATCHES_Transform && MATCHES_AABB && MATCHES_Color &&MATCHES_Plane);
+static_assert(MATCHES_Vector2 && MATCHES_Rect2 && MATCHES_Transform2D && MATCHES_Vector3 &&
+				MATCHES_Basis && MATCHES_Quat && MATCHES_Transform && MATCHES_AABB && MATCHES_Color && MATCHES_Plane);
 /* clang-format on */
 #endif
 
diff --git a/modules/mono/mono_gd/gd_mono_method.cpp b/modules/mono/mono_gd/gd_mono_method.cpp
index 971c5ac737..e6a1ec2697 100644
--- a/modules/mono/mono_gd/gd_mono_method.cpp
+++ b/modules/mono/mono_gd/gd_mono_method.cpp
@@ -101,50 +101,41 @@ IMonoClassMember::Visibility GDMonoMethod::get_visibility() {
 	}
 }
 
-MonoObject *GDMonoMethod::invoke(MonoObject *p_object, const Variant **p_params, MonoException **r_exc) {
-	if (get_return_type().type_encoding != MONO_TYPE_VOID || get_parameters_count() > 0) {
-		MonoArray *params = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), get_parameters_count());
+MonoObject *GDMonoMethod::invoke(MonoObject *p_object, const Variant **p_params, MonoException **r_exc) const {
+	MonoException *exc = NULL;
+	MonoObject *ret;
+
+	if (params_count > 0) {
+		MonoArray *params = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), params_count);
 
 		for (int i = 0; i < params_count; i++) {
 			MonoObject *boxed_param = GDMonoMarshal::variant_to_mono_object(p_params[i], param_types[i]);
 			mono_array_setref(params, i, boxed_param);
 		}
 
-		MonoException *exc = NULL;
-		MonoObject *ret = GDMonoUtils::runtime_invoke_array(mono_method, p_object, params, &exc);
-
-		if (exc) {
-			ret = NULL;
-			if (r_exc) {
-				*r_exc = exc;
-			} else {
-				GDMonoUtils::set_pending_exception(exc);
-			}
-		}
-
-		return ret;
+		ret = GDMonoUtils::runtime_invoke_array(mono_method, p_object, params, &exc);
 	} else {
-		MonoException *exc = NULL;
-		GDMonoUtils::runtime_invoke(mono_method, p_object, NULL, &exc);
-
-		if (exc) {
-			if (r_exc) {
-				*r_exc = exc;
-			} else {
-				GDMonoUtils::set_pending_exception(exc);
-			}
-		}
+		ret = GDMonoUtils::runtime_invoke(mono_method, p_object, NULL, &exc);
+	}
 
-		return NULL;
+	if (exc) {
+		ret = NULL;
+		if (r_exc) {
+			*r_exc = exc;
+		} else {
+			GDMonoUtils::set_pending_exception(exc);
+		}
 	}
+
+	return ret;
 }
 
-MonoObject *GDMonoMethod::invoke(MonoObject *p_object, MonoException **r_exc) {
+MonoObject *GDMonoMethod::invoke(MonoObject *p_object, MonoException **r_exc) const {
 	ERR_FAIL_COND_V(get_parameters_count() > 0, NULL);
 	return invoke_raw(p_object, NULL, r_exc);
 }
 
-MonoObject *GDMonoMethod::invoke_raw(MonoObject *p_object, void **p_params, MonoException **r_exc) {
+MonoObject *GDMonoMethod::invoke_raw(MonoObject *p_object, void **p_params, MonoException **r_exc) const {
 	MonoException *exc = NULL;
 	MonoObject *ret = GDMonoUtils::runtime_invoke(mono_method, p_object, p_params, &exc);
 
@@ -247,7 +238,7 @@ void GDMonoMethod::get_parameter_names(Vector<StringName> &names) const {
 }
 
 void GDMonoMethod::get_parameter_types(Vector<ManagedType> &types) const {
-	for (int i = 0; i < param_types.size(); ++i) {
+	for (int i = 0; i < params_count; ++i) {
 		types.push_back(param_types[i]);
 	}
 }
@@ -256,13 +247,22 @@ const MethodInfo &GDMonoMethod::get_method_info() {
 
 	if (!method_info_fetched) {
 		method_info.name = name;
-		method_info.return_val = PropertyInfo(GDMonoMarshal::managed_to_variant_type(return_type), "");
+
+		bool nil_is_variant = false;
+		method_info.return_val = PropertyInfo(GDMonoMarshal::managed_to_variant_type(return_type, &nil_is_variant), "");
+		if (method_info.return_val.type == Variant::NIL && nil_is_variant)
+			method_info.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
 
 		Vector<StringName> names;
 		get_parameter_names(names);
 
 		for (int i = 0; i < params_count; ++i) {
-			method_info.arguments.push_back(PropertyInfo(GDMonoMarshal::managed_to_variant_type(param_types[i]), names[i]));
+			nil_is_variant = false;
+			PropertyInfo arg_info = PropertyInfo(GDMonoMarshal::managed_to_variant_type(param_types[i], &nil_is_variant), names[i]);
+			if (arg_info.type == Variant::NIL && nil_is_variant)
+				arg_info.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
+
+			method_info.arguments.push_back(arg_info);
 		}
 
 		// TODO: default arguments
diff --git a/modules/mono/mono_gd/gd_mono_method.h b/modules/mono/mono_gd/gd_mono_method.h
index b47e42dec2..d4379f41fe 100644
--- a/modules/mono/mono_gd/gd_mono_method.h
+++ b/modules/mono/mono_gd/gd_mono_method.h
@@ -57,28 +57,28 @@ class GDMonoMethod : public IMonoClassMember {
 	MonoMethod *mono_method;
 
 public:
-	virtual GDMonoClass *get_enclosing_class() const GD_FINAL;
+	virtual GDMonoClass *get_enclosing_class() const final;
 
-	virtual MemberType get_member_type() const GD_FINAL { return MEMBER_TYPE_METHOD; }
+	virtual MemberType get_member_type() const final { return MEMBER_TYPE_METHOD; }
 
-	virtual StringName get_name() const GD_FINAL { return name; }
+	virtual StringName get_name() const final { return name; }
 
-	virtual bool is_static() GD_FINAL;
+	virtual bool is_static() final;
 
-	virtual Visibility get_visibility() GD_FINAL;
+	virtual Visibility get_visibility() final;
 
-	virtual bool has_attribute(GDMonoClass *p_attr_class) GD_FINAL;
-	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) GD_FINAL;
+	virtual bool has_attribute(GDMonoClass *p_attr_class) final;
+	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) final;
 	void fetch_attributes();
 
-	_FORCE_INLINE_ MonoMethod *get_mono_ptr() { return mono_method; }
+	_FORCE_INLINE_ MonoMethod *get_mono_ptr() const { return mono_method; }
 
-	_FORCE_INLINE_ int get_parameters_count() { return params_count; }
-	_FORCE_INLINE_ ManagedType get_return_type() { return return_type; }
+	_FORCE_INLINE_ int get_parameters_count() const { return params_count; }
+	_FORCE_INLINE_ ManagedType get_return_type() const { return return_type; }
 
-	MonoObject *invoke(MonoObject *p_object, const Variant **p_params, MonoException **r_exc = NULL);
-	MonoObject *invoke(MonoObject *p_object, MonoException **r_exc = NULL);
-	MonoObject *invoke_raw(MonoObject *p_object, void **p_params, MonoException **r_exc = NULL);
+	MonoObject *invoke(MonoObject *p_object, const Variant **p_params, MonoException **r_exc = NULL) const;
+	MonoObject *invoke(MonoObject *p_object, MonoException **r_exc = NULL) const;
+	MonoObject *invoke_raw(MonoObject *p_object, void **p_params, MonoException **r_exc = NULL) const;
 
 	String get_full_name(bool p_signature = false) const;
 	String get_full_name_no_class() const;
diff --git a/modules/mono/mono_gd/gd_mono_property.h b/modules/mono/mono_gd/gd_mono_property.h
index 692037f76a..2aec64f565 100644
--- a/modules/mono/mono_gd/gd_mono_property.h
+++ b/modules/mono/mono_gd/gd_mono_property.h
@@ -47,17 +47,17 @@ class GDMonoProperty : public IMonoClassMember {
 	MonoCustomAttrInfo *attributes;
 
 public:
-	virtual GDMonoClass *get_enclosing_class() const GD_FINAL { return owner; }
+	virtual GDMonoClass *get_enclosing_class() const final { return owner; }
 
-	virtual MemberType get_member_type() const GD_FINAL { return MEMBER_TYPE_PROPERTY; }
+	virtual MemberType get_member_type() const final { return MEMBER_TYPE_PROPERTY; }
 
-	virtual StringName get_name() const GD_FINAL { return name; }
+	virtual StringName get_name() const final { return name; }
 
-	virtual bool is_static() GD_FINAL;
-	virtual Visibility get_visibility() GD_FINAL;
+	virtual bool is_static() final;
+	virtual Visibility get_visibility() final;
 
-	virtual bool has_attribute(GDMonoClass *p_attr_class) GD_FINAL;
-	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) GD_FINAL;
+	virtual bool has_attribute(GDMonoClass *p_attr_class) final;
+	virtual MonoObject *get_attribute(GDMonoClass *p_attr_class) final;
 	void fetch_attributes();
 
 	bool has_getter();
diff --git a/modules/mono/mono_gd/gd_mono_utils.cpp b/modules/mono/mono_gd/gd_mono_utils.cpp
index bc290f3a7f..fa04183ea3 100644
--- a/modules/mono/mono_gd/gd_mono_utils.cpp
+++ b/modules/mono/mono_gd/gd_mono_utils.cpp
@@ -162,6 +162,13 @@ void runtime_object_init(MonoObject *p_this_obj, GDMonoClass *p_class, MonoExcep
 	ctor->invoke_raw(p_this_obj, NULL, r_exc);
 }
 
+bool mono_delegate_equal(MonoDelegate *p_a, MonoDelegate *p_b) {
+	MonoException *exc = NULL;
+	MonoBoolean res = CACHED_METHOD_THUNK(Delegate, Equals).invoke((MonoObject *)p_a, (MonoObject *)p_b, &exc);
+	UNHANDLED_EXCEPTION(exc);
+	return (bool)res;
+}
+
 GDMonoClass *get_object_class(MonoObject *p_object) {
 	return GDMono::get_singleton()->get_class(mono_object_get_class(p_object));
 }
@@ -220,6 +227,18 @@ MonoObject *create_managed_for_godot_object(GDMonoClass *p_class, const StringNa
 	return mono_object;
 }
 
+MonoObject *create_managed_from(const StringName &p_from) {
+	MonoObject *mono_object = mono_object_new(mono_domain_get(), CACHED_CLASS_RAW(StringName));
+	ERR_FAIL_NULL_V(mono_object, NULL);
+
+	// Construct
+	GDMonoUtils::runtime_object_init(mono_object, CACHED_CLASS(StringName));
+
+	CACHED_FIELD(StringName, ptr)->set_value_raw(mono_object, memnew(StringName(p_from)));
+
+	return mono_object;
+}
+
 MonoObject *create_managed_from(const NodePath &p_from) {
 	MonoObject *mono_object = mono_object_new(mono_domain_get(), CACHED_CLASS_RAW(NodePath));
 	ERR_FAIL_NULL_V(mono_object, NULL);
@@ -362,7 +381,11 @@ void debug_send_unhandled_exception_error(MonoException *p_exc) {
 		return;
 	}
 
-	_TLS_RECURSION_GUARD_;
+	static thread_local bool _recursion_flag_ = false;
+	if (_recursion_flag_)
+		return;
+	_recursion_flag_ = true;
+	SCOPE_EXIT { _recursion_flag_ = false; };
 
 	ScriptLanguage::StackInfo separator;
 	separator.file = String();
@@ -439,8 +462,7 @@ void set_pending_exception(MonoException *p_exc) {
 #endif
 }
 
-_THREAD_LOCAL_(int)
-current_invoke_count = 0;
+thread_local int current_invoke_count = 0;
 
 MonoObject *runtime_invoke(MonoMethod *p_method, void *p_obj, void **p_params, MonoException **r_exc) {
 	GD_MONO_BEGIN_RUNTIME_INVOKE;
@@ -644,6 +666,10 @@ ScopeThreadAttach::~ScopeThreadAttach() {
 	}
 }
 
-// namespace Marshal
+StringName get_native_godot_class_name(GDMonoClass *p_class) {
+	MonoObject *native_name_obj = p_class->get_field(BINDINGS_NATIVE_NAME_FIELD)->get_value(NULL);
+	StringName *ptr = GDMonoMarshal::unbox<StringName *>(CACHED_FIELD(StringName, ptr)->get_value(native_name_obj));
+	return ptr ? *ptr : StringName();
+}
 
 } // namespace GDMonoUtils
diff --git a/modules/mono/mono_gd/gd_mono_utils.h b/modules/mono/mono_gd/gd_mono_utils.h
index db9f99bfdc..7b7afc44e0 100644
--- a/modules/mono/mono_gd/gd_mono_utils.h
+++ b/modules/mono/mono_gd/gd_mono_utils.h
@@ -35,7 +35,6 @@
 
 #include "../mono_gc_handle.h"
 #include "../utils/macros.h"
-#include "../utils/thread_local.h"
 #include "gd_mono_header.h"
 
 #include "core/object.h"
@@ -95,12 +94,15 @@ _FORCE_INLINE_ bool is_main_thread() {
 
 void runtime_object_init(MonoObject *p_this_obj, GDMonoClass *p_class, MonoException **r_exc = NULL);
 
+bool mono_delegate_equal(MonoDelegate *p_a, MonoDelegate *p_b);
+
 GDMonoClass *get_object_class(MonoObject *p_object);
 GDMonoClass *type_get_proxy_class(const StringName &p_type);
 GDMonoClass *get_class_native_base(GDMonoClass *p_class);
 
 MonoObject *create_managed_for_godot_object(GDMonoClass *p_class, const StringName &p_native, Object *p_object);
 
+MonoObject *create_managed_from(const StringName &p_from);
 MonoObject *create_managed_from(const NodePath &p_from);
 MonoObject *create_managed_from(const RID &p_from);
 MonoObject *create_managed_from(const Array &p_from, GDMonoClass *p_class);
@@ -123,7 +125,7 @@ void print_unhandled_exception(MonoException *p_exc);
  */
 void set_pending_exception(MonoException *p_exc);
 
-extern _THREAD_LOCAL_(int) current_invoke_count;
+extern thread_local int current_invoke_count;
 
 _FORCE_INLINE_ int get_runtime_invoke_count() {
 	return current_invoke_count;
@@ -152,9 +154,11 @@ private:
 	MonoThread *mono_thread;
 };
 
+StringName get_native_godot_class_name(GDMonoClass *p_class);
+
 } // namespace GDMonoUtils
 
-#define NATIVE_GDMONOCLASS_NAME(m_class) (GDMonoMarshal::mono_string_to_godot((MonoString *)m_class->get_field(BINDINGS_NATIVE_NAME_FIELD)->get_value(NULL)))
+#define NATIVE_GDMONOCLASS_NAME(m_class) (GDMonoUtils::get_native_godot_class_name(m_class))
 
 #define GD_MONO_BEGIN_RUNTIME_INVOKE                                              \
 	int &_runtime_invoke_count_ref = GDMonoUtils::get_runtime_invoke_count_ref(); \