Merge remote-tracking branch 'godot/master' into cmake-exporting-config

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
             platform: android
             artifact-name: godot-cpp-android-arm64-release
             artifact-path: bin/libgodot-cpp.android.template_release.arm64.a
-            flags: ANDROID_NDK_ROOT=$ANDROID_NDK_LATEST_HOME arch=arm64
+            flags: arch=arm64
             run-tests: false
             cache-name: android-arm64
 
@@ -88,7 +88,7 @@ jobs:
 
     env:
       SCONS_CACHE: ${{ github.workspace }}/.scons-cache/
-      EM_VERSION: 3.1.45
+      EM_VERSION: 3.1.39
       EM_CACHE_FOLDER: "emsdk-cache"
 
     steps:
@@ -104,33 +104,34 @@ jobs:
         continue-on-error: true
 
       - name: Set up Python (for SCons)
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.x'
 
-      - name: Linux dependencies
+      - name: Android dependencies
-        if: ${{ matrix.platform == 'linux' }}
+        if: ${{ matrix.platform == 'android' }}
-        run: |
+        uses: nttld/setup-ndk@v1
-          sudo apt-get update -qq
+        with:
-          sudo apt-get install -qqq build-essential pkg-config
+          ndk-version: r23c
+          link-to-sdk: true
 
       - name: Web dependencies
         if: ${{ matrix.platform == 'web' }}
-        uses: mymindstorm/setup-emsdk@v12
+        uses: mymindstorm/setup-emsdk@v13
         with:
           version: ${{env.EM_VERSION}}
           actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
 
-      - name: Install scons
-        run: |
-          python -m pip install scons==4.0.0
-
       - name: Setup MinGW for Windows/MinGW build
         if: ${{ matrix.platform == 'windows' && matrix.flags == 'use_mingw=yes' }}
         uses: egor-tensin/setup-mingw@v2
         with:
           version: 12.2.0
 
+      - name: Install scons
+        run: |
+          python -m pip install scons==4.0.0
+
       - name: Generate godot-cpp sources only
         run: |
           scons platform=${{ matrix.platform }} build_library=no ${{ matrix.flags }}

CMakeLists.txt

@@ -50,11 +50,6 @@ option(GODOT_CPP_INSTALL "Enables target install for exporting godot-cpp cmake c
 # Add path to modules
 list( APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/" )
 
-# Check if we are building ourself or being included
-if(${PROJECT_NAME} STREQUAL ${CMAKE_PROJECT_NAME})
-    set(GODOT_CPP_BUILDING_SELF ON)
-endif()
-
 # Set some helper variables for readability
 set( compiler_is_clang "$<OR:$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:Clang>>" )
 set( compiler_is_gnu "$<CXX_COMPILER_ID:GNU>" )
@@ -102,10 +97,8 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 
 	add_definitions(-DNOMINMAX)
 else()  # GCC/Clang
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -g")
-
 	if(CMAKE_BUILD_TYPE MATCHES Debug)
-		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0")
+		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0 -g")
 	else()
 		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -O3")
 	endif(CMAKE_BUILD_TYPE MATCHES Debug)
@@ -137,6 +130,7 @@ endif()
 execute_process(COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.print_file_list(\"${GODOT_GDEXTENSION_API_FILE}\", \"${CMAKE_CURRENT_BINARY_DIR}\", headers=True, sources=True)"
 	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 	OUTPUT_VARIABLE GENERATED_FILES_LIST
+	OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
 add_custom_command(OUTPUT ${GENERATED_FILES_LIST}
@@ -162,12 +156,6 @@ add_library(godot::cpp ALIAS ${PROJECT_NAME})
 
 include(GodotCompilerWarnings)
 
-# Treat warnings as errors if we are building ourself
-if(GODOT_CPP_BUILDING_SELF)
-    unset( GODOT_CPP_WARNING_AS_ERROR CACHE )
-    set_warning_as_error()
-endif()
-
 target_compile_features(${PROJECT_NAME}
 	PRIVATE
 		cxx_std_17

README.md

@@ -7,8 +7,9 @@
 > from Godot's `master` branch.
 >
 > For users of stable branches, switch to the branch matching your target Godot version:
-> - [`4.0`](https://github.com/godotengine/godot-cpp/tree/4.0)
+> - [`4.2`](https://github.com/godotengine/godot-cpp/tree/4.2)
 > - [`4.1`](https://github.com/godotengine/godot-cpp/tree/4.1)
+> - [`4.0`](https://github.com/godotengine/godot-cpp/tree/4.0)
 >
 > Or check out the Git tag matching your Godot version (e.g. `godot-4.1.1-stable`).
 >

binding_generator.py

@@ -110,6 +110,8 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
 
     for native_struct in api["native_structures"]:
         struct_name = native_struct["name"]
+        if struct_name == "ObjectID":
+            continue
         snake_struct_name = camel_to_snake(struct_name)
 
         header_filename = include_gen_folder / "classes" / (snake_struct_name + ".hpp")
@@ -136,9 +138,7 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
 
 
 def print_file_list(api_filepath, output_dir, headers=False, sources=False):
-    end = ";"
+    print(*get_file_list(api_filepath, output_dir, headers, sources), sep=";", end=None)
-    for f in get_file_list(api_filepath, output_dir, headers, sources):
-        print(f, end=end)
 
 
 def scons_emit_files(target, source, env):
@@ -416,6 +416,9 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
     if class_name == "Array":
         result.append("#include <godot_cpp/variant/array_helpers.hpp>")
 
+    if class_name == "Callable":
+        result.append("#include <godot_cpp/variant/callable_custom.hpp>")
+
     for include in fully_used_classes:
         if include == "TypedArray":
             result.append("#include <godot_cpp/variant/typed_array.hpp>")
@@ -525,6 +528,9 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
         result.append(f"\t{class_name}(const wchar_t *from);")
         result.append(f"\t{class_name}(const char16_t *from);")
         result.append(f"\t{class_name}(const char32_t *from);")
+    if class_name == "Callable":
+        result.append("\tCallable(CallableCustom *p_custom);")
+        result.append("\tCallableCustom *get_custom() const;")
 
     if "constants" in builtin_api:
         axis_constants_count = 0
@@ -1083,6 +1089,8 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
             class_api["alias_for"] = "ClassDB"
         engine_classes[class_api["name"]] = class_api["is_refcounted"]
     for native_struct in api["native_structures"]:
+        if native_struct["name"] == "ObjectID":
+            continue
         engine_classes[native_struct["name"]] = False
         native_structures.append(native_struct["name"])
 
@@ -1210,6 +1218,8 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
 
     for native_struct in api["native_structures"]:
         struct_name = native_struct["name"]
+        if struct_name == "ObjectID":
+            continue
         snake_struct_name = camel_to_snake(struct_name)
 
         header_filename = include_gen_folder / (snake_struct_name + ".hpp")
@@ -1319,7 +1329,11 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
 
     if "enums" in class_api:
         for enum_api in class_api["enums"]:
-            result.append(f'\tenum {enum_api["name"]} {{')
+            if enum_api["is_bitfield"]:
+                result.append(f'\tenum {enum_api["name"]} : uint64_t {{')
+            else:
+                result.append(f'\tenum {enum_api["name"]} {{')
+
             for value in enum_api["values"]:
                 result.append(f'\t\t{value["name"]} = {value["value"]},')
             result.append("\t};")
@@ -1676,6 +1690,8 @@ def generate_global_constants(api, output_dir):
     header.append(f"#ifndef {header_guard}")
     header.append(f"#define {header_guard}")
     header.append("")
+    header.append("#include <cstdint>")
+    header.append("")
     header.append("namespace godot {")
     header.append("")
 
@@ -1688,7 +1704,11 @@ def generate_global_constants(api, output_dir):
         if enum_def["name"].startswith("Variant."):
             continue
 
-        header.append(f'\tenum {enum_def["name"]} {{')
+        if enum_def["is_bitfield"]:
+            header.append(f'\tenum {enum_def["name"]} : uint64_t {{')
+        else:
+            header.append(f'\tenum {enum_def["name"]} {{')
+
         for value in enum_def["values"]:
             header.append(f'\t\t{value["name"]} = {value["value"]},')
         header.append("\t};")

gdextension/extension_api.json

@@ -3,9 +3,9 @@
 		"version_major": 4,
 		"version_minor": 2,
 		"version_patch": 0,
-		"version_status": "beta6",
+		"version_status": "stable",
 		"version_build": "official",
-		"version_full_name": "Godot Engine v4.2.beta6.official"
+		"version_full_name": "Godot Engine v4.2.stable.official"
 	},
 	"builtin_class_sizes": [
 		{

include/godot_cpp/core/object.hpp

@@ -33,6 +33,8 @@
 
 #include <godot_cpp/core/defs.hpp>
 
+#include <godot_cpp/core/object_id.hpp>
+
 #include <godot_cpp/core/property_info.hpp>
 
 #include <godot_cpp/variant/variant.hpp>
@@ -106,28 +108,6 @@ MethodInfo::MethodInfo(const PropertyInfo &p_ret, StringName p_name, const Args
 	arguments = { args... };
 }
 
-class ObjectID {
-	uint64_t id = 0;
-
-public:
-	_FORCE_INLINE_ bool is_ref_counted() const { return (id & (uint64_t(1) << 63)) != 0; }
-	_FORCE_INLINE_ bool is_valid() const { return id != 0; }
-	_FORCE_INLINE_ bool is_null() const { return id == 0; }
-	_FORCE_INLINE_ operator uint64_t() const { return id; }
-	_FORCE_INLINE_ operator int64_t() const { return id; }
-
-	_FORCE_INLINE_ bool operator==(const ObjectID &p_id) const { return id == p_id.id; }
-	_FORCE_INLINE_ bool operator!=(const ObjectID &p_id) const { return id != p_id.id; }
-	_FORCE_INLINE_ bool operator<(const ObjectID &p_id) const { return id < p_id.id; }
-
-	_FORCE_INLINE_ void operator=(int64_t p_int64) { id = p_int64; }
-	_FORCE_INLINE_ void operator=(uint64_t p_uint64) { id = p_uint64; }
-
-	_FORCE_INLINE_ ObjectID() {}
-	_FORCE_INLINE_ explicit ObjectID(const uint64_t p_id) { id = p_id; }
-	_FORCE_INLINE_ explicit ObjectID(const int64_t p_id) { id = p_id; }
-};
-
 class ObjectDB {
 public:
 	static Object *get_instance(uint64_t p_object_id) {

include/godot_cpp/core/object_id.hpp

@@ -0,0 +1,62 @@
+/**************************************************************************/
+/*  object_id.hpp                                                         */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_OBJECT_ID_HPP
+#define GODOT_OBJECT_ID_HPP
+
+#include <godot_cpp/core/defs.hpp>
+
+namespace godot {
+
+class ObjectID {
+	uint64_t id = 0;
+
+public:
+	_FORCE_INLINE_ bool is_ref_counted() const { return (id & (uint64_t(1) << 63)) != 0; }
+	_FORCE_INLINE_ bool is_valid() const { return id != 0; }
+	_FORCE_INLINE_ bool is_null() const { return id == 0; }
+	_FORCE_INLINE_ operator uint64_t() const { return id; }
+	_FORCE_INLINE_ operator int64_t() const { return id; }
+
+	_FORCE_INLINE_ bool operator==(const ObjectID &p_id) const { return id == p_id.id; }
+	_FORCE_INLINE_ bool operator!=(const ObjectID &p_id) const { return id != p_id.id; }
+	_FORCE_INLINE_ bool operator<(const ObjectID &p_id) const { return id < p_id.id; }
+
+	_FORCE_INLINE_ void operator=(int64_t p_int64) { id = p_int64; }
+	_FORCE_INLINE_ void operator=(uint64_t p_uint64) { id = p_uint64; }
+
+	_FORCE_INLINE_ ObjectID() {}
+	_FORCE_INLINE_ explicit ObjectID(const uint64_t p_id) { id = p_id; }
+	_FORCE_INLINE_ explicit ObjectID(const int64_t p_id) { id = p_id; }
+};
+
+} // namespace godot
+
+#endif // GODOT_OBJECT_ID_HPP

include/godot_cpp/godot.hpp

@@ -166,6 +166,7 @@ extern "C" GDExtensionInterfaceObjectCastTo gdextension_interface_object_cast_to
 extern "C" GDExtensionInterfaceObjectGetInstanceFromId gdextension_interface_object_get_instance_from_id;
 extern "C" GDExtensionInterfaceObjectGetInstanceId gdextension_interface_object_get_instance_id;
 extern "C" GDExtensionInterfaceCallableCustomCreate gdextension_interface_callable_custom_create;
+extern "C" GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata;
 extern "C" GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object;
 extern "C" GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object;
 extern "C" GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2;
@@ -193,26 +194,44 @@ enum ModuleInitializationLevel {
 	MODULE_INITIALIZATION_LEVEL_CORE = GDEXTENSION_INITIALIZATION_CORE,
 	MODULE_INITIALIZATION_LEVEL_SERVERS = GDEXTENSION_INITIALIZATION_SERVERS,
 	MODULE_INITIALIZATION_LEVEL_SCENE = GDEXTENSION_INITIALIZATION_SCENE,
-	MODULE_INITIALIZATION_LEVEL_EDITOR = GDEXTENSION_INITIALIZATION_EDITOR
+	MODULE_INITIALIZATION_LEVEL_EDITOR = GDEXTENSION_INITIALIZATION_EDITOR,
+	MODULE_INITIALIZATION_LEVEL_MAX
 };
 
 class GDExtensionBinding {
 public:
 	using Callback = void (*)(ModuleInitializationLevel p_level);
 
-	static Callback init_callback;
+	struct InitData {
-	static Callback terminate_callback;
+		GDExtensionInitializationLevel minimum_initialization_level = GDEXTENSION_INITIALIZATION_CORE;
-	static GDExtensionInitializationLevel minimum_initialization_level;
+		Callback init_callback = nullptr;
-	static GDExtensionBool init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization);
+		Callback terminate_callback = nullptr;
+	};
+
+	class InitDataList {
+		int data_count = 0;
+		int data_capacity = 0;
+		InitData **data = nullptr;
+
+	public:
+		void add(InitData *p_cb);
+		~InitDataList();
+	};
+
+	static bool api_initialized;
+	static int level_initialized[MODULE_INITIALIZATION_LEVEL_MAX];
+	static InitDataList initdata;
+	static GDExtensionBool init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, InitData *p_init_data, GDExtensionInitialization *r_initialization);
 
 public:
-	static void initialize_level(void *userdata, GDExtensionInitializationLevel p_level);
+	static void initialize_level(void *p_userdata, GDExtensionInitializationLevel p_level);
-	static void deinitialize_level(void *userdata, GDExtensionInitializationLevel p_level);
+	static void deinitialize_level(void *p_userdata, GDExtensionInitializationLevel p_level);
 
 	class InitObject {
 		GDExtensionInterfaceGetProcAddress get_proc_address;
 		GDExtensionClassLibraryPtr library;
 		GDExtensionInitialization *initialization;
+		mutable InitData *init_data = nullptr;
 
 	public:
 		InitObject(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization);

include/godot_cpp/variant/callable_custom.hpp

@@ -0,0 +1,64 @@
+/**************************************************************************/
+/*  callable_custom.hpp                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_CALLABLE_CUSTOM_HPP
+#define GODOT_CALLABLE_CUSTOM_HPP
+
+#include <godot_cpp/core/object_id.hpp>
+#include <godot_cpp/variant/string_name.hpp>
+
+namespace godot {
+
+class Object;
+
+class CallableCustomBase {
+public:
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+	virtual ~CallableCustomBase() {}
+};
+
+class CallableCustom : public CallableCustomBase {
+public:
+	typedef bool (*CompareEqualFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+	typedef bool (*CompareLessFunc)(const CallableCustom *p_a, const CallableCustom *p_b);
+
+	virtual uint32_t hash() const = 0;
+	virtual String get_as_text() const = 0;
+	virtual CompareEqualFunc get_compare_equal_func() const = 0;
+	virtual CompareLessFunc get_compare_less_func() const = 0;
+	virtual bool is_valid() const;
+	virtual ObjectID get_object() const = 0;
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+};
+
+} // namespace godot
+
+#endif // GODOT_CALLABLE_CUSTOM_HPP

include/godot_cpp/variant/callable_method_pointer.hpp

@@ -36,16 +36,23 @@
 
 namespace godot {
 
-class CallableCustomMethodPointerBase {
+class CallableCustomMethodPointerBase : public CallableCustomBase {
+	uint32_t *comp_ptr = nullptr;
+	uint32_t comp_size;
+	uint32_t h;
+
+protected:
+	void _setup(uint32_t *p_base_ptr, uint32_t p_ptr_size);
+
 public:
-	virtual Object *get_object() const = 0;
+	_FORCE_INLINE_ const uint32_t *get_comp_ptr() const { return comp_ptr; }
-	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const = 0;
+	_FORCE_INLINE_ uint32_t get_comp_size() const { return comp_size; }
-	virtual ~CallableCustomMethodPointerBase() {}
+	_FORCE_INLINE_ uint32_t get_hash() const { return h; }
 };
 
 namespace internal {
 
-Callable create_custom_callable(CallableCustomMethodPointerBase *p_callable_method_pointer);
+Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer);
 
 } // namespace internal
 
@@ -55,21 +62,26 @@ Callable create_custom_callable(CallableCustomMethodPointerBase *p_callable_meth
 
 template <class T, class... P>
 class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
-	T *instance;
+	struct Data {
-	void (T::*method)(P...);
+		T *instance;
+		void (T::*method)(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
 
 public:
-	virtual Object *get_object() const override {
+	virtual ObjectID get_object() const override {
-		return instance;
+		return ObjectID(data.instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
-		call_with_variant_args(instance, method, p_arguments, p_argcount, r_call_error);
+		call_with_variant_args(data.instance, data.method, p_arguments, p_argcount, r_call_error);
 	}
 
 	CallableCustomMethodPointer(T *p_instance, void (T::*p_method)(P...)) {
-		instance = p_instance;
+		memset(&data, 0, sizeof(Data));
-		method = p_method;
+		data.instance = p_instance;
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
 	}
 };
 
@@ -77,7 +89,7 @@ template <class T, class... P>
 Callable create_custom_callable_function_pointer(T *p_instance, void (T::*p_method)(P...)) {
 	typedef CallableCustomMethodPointer<T, P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -86,22 +98,27 @@ Callable create_custom_callable_function_pointer(T *p_instance, void (T::*p_meth
 
 template <class T, class R, class... P>
 class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
-	T *instance;
+	struct Data {
-	R(T::*method)
+		T *instance;
-	(P...);
+		R(T::*method)
+		(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
 
 public:
-	virtual Object *get_object() const override {
+	virtual ObjectID get_object() const override {
-		return instance;
+		return ObjectID(data.instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
-		call_with_variant_args_ret(instance, method, p_arguments, p_argcount, r_return_value, r_call_error);
+		call_with_variant_args_ret(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
 	}
 
 	CallableCustomMethodPointerRet(T *p_instance, R (T::*p_method)(P...)) {
-		instance = p_instance;
+		memset(&data, 0, sizeof(Data));
-		method = p_method;
+		data.instance = p_instance;
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
 	}
 };
 
@@ -109,7 +126,7 @@ template <class T, class R, class... P>
 Callable create_custom_callable_function_pointer(T *p_instance, R (T::*p_method)(P...)) {
 	typedef CallableCustomMethodPointerRet<T, R, P...> CCMP; // Messes with memnew otherwise.
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -118,22 +135,27 @@ Callable create_custom_callable_function_pointer(T *p_instance, R (T::*p_method)
 
 template <class T, class R, class... P>
 class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
-	T *instance;
+	struct Data {
-	R(T::*method)
+		T *instance;
-	(P...) const;
+		R(T::*method)
+		(P...) const;
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
 
 public:
-	virtual Object *get_object() const override {
+	virtual ObjectID get_object() const override {
-		return instance;
+		return ObjectID(data.instance->get_instance_id());
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
-		call_with_variant_args_retc(instance, method, p_arguments, p_argcount, r_return_value, r_call_error);
+		call_with_variant_args_retc(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
 	}
 
 	CallableCustomMethodPointerRetC(const T *p_instance, R (T::*p_method)(P...) const) {
-		instance = const_cast<T *>(p_instance);
+		memset(&data, 0, sizeof(Data));
-		method = p_method;
+		data.instance = const_cast<T *>(p_instance);
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
 	}
 };
 
@@ -141,7 +163,7 @@ template <class T, class R, class... P>
 Callable create_custom_callable_function_pointer(const T *p_instance, R (T::*p_method)(P...) const) {
 	typedef CallableCustomMethodPointerRetC<T, R, P...> CCMP; // Messes with memnew otherwise.
 	CCMP *ccmp = memnew(CCMP(p_instance, p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -150,20 +172,25 @@ Callable create_custom_callable_function_pointer(const T *p_instance, R (T::*p_m
 
 template <class... P>
 class CallableCustomStaticMethodPointer : public CallableCustomMethodPointerBase {
-	void (*method)(P...);
+	struct Data {
+		void (*method)(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
 
 public:
-	virtual Object *get_object() const override {
+	virtual ObjectID get_object() const override {
-		return nullptr;
+		return ObjectID();
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
-		call_with_variant_args_static_ret(method, p_arguments, p_argcount, r_return_value, r_call_error);
+		call_with_variant_args_static_ret(data.method, p_arguments, p_argcount, r_return_value, r_call_error);
 		r_return_value = Variant();
 	}
 
 	CallableCustomStaticMethodPointer(void (*p_method)(P...)) {
-		method = p_method;
+		memset(&data, 0, sizeof(Data));
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
 	}
 };
 
@@ -171,7 +198,7 @@ template <class... P>
 Callable create_custom_callable_static_function_pointer(void (*p_method)(P...)) {
 	typedef CallableCustomStaticMethodPointer<P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //
@@ -180,20 +207,25 @@ Callable create_custom_callable_static_function_pointer(void (*p_method)(P...))
 
 template <class R, class... P>
 class CallableCustomStaticMethodPointerRet : public CallableCustomMethodPointerBase {
-	R(*method)
+	struct Data {
-	(P...);
+		R(*method)
+		(P...);
+	} data;
+	static_assert(sizeof(Data) % 4 == 0);
 
 public:
-	virtual Object *get_object() const override {
+	virtual ObjectID get_object() const override {
-		return nullptr;
+		return ObjectID();
 	}
 
 	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const override {
-		call_with_variant_args_static_ret(method, p_arguments, p_argcount, r_return_value, r_call_error);
+		call_with_variant_args_static_ret(data.method, p_arguments, p_argcount, r_return_value, r_call_error);
 	}
 
 	CallableCustomStaticMethodPointerRet(R (*p_method)(P...)) {
-		method = p_method;
+		memset(&data, 0, sizeof(Data));
+		data.method = p_method;
+		_setup((uint32_t *)&data, sizeof(Data));
 	}
 };
 
@@ -201,7 +233,7 @@ template <class R, class... P>
 Callable create_custom_callable_static_function_pointer(R (*p_method)(P...)) {
 	typedef CallableCustomStaticMethodPointerRet<R, P...> CCMP;
 	CCMP *ccmp = memnew(CCMP(p_method));
-	return ::godot::internal::create_custom_callable(ccmp);
+	return ::godot::internal::create_callable_from_ccmp(ccmp);
 }
 
 //

include/godot_cpp/variant/variant.hpp

@@ -154,10 +154,18 @@ public:
 	Variant(int64_t v);
 	Variant(int32_t v) :
 			Variant(static_cast<int64_t>(v)) {}
-	Variant(uint32_t v) :
+	Variant(int16_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(int8_t v) :
 			Variant(static_cast<int64_t>(v)) {}
 	Variant(uint64_t v) :
 			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint32_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint16_t v) :
+			Variant(static_cast<int64_t>(v)) {}
+	Variant(uint8_t v) :
+			Variant(static_cast<int64_t>(v)) {}
 	Variant(double v);
 	Variant(float v) :
 			Variant((double)v) {}
@@ -209,8 +217,12 @@ public:
 	operator bool() const;
 	operator int64_t() const;
 	operator int32_t() const;
+	operator int16_t() const;
+	operator int8_t() const;
 	operator uint64_t() const;
 	operator uint32_t() const;
+	operator uint16_t() const;
+	operator uint8_t() const;
 	operator double() const;
 	operator float() const;
 	operator String() const;
@@ -344,6 +356,12 @@ String vformat(const String &p_text, const VarArgs... p_args) {
 
 #include <godot_cpp/variant/builtin_vararg_methods.hpp>
 
+#ifdef REAL_T_IS_DOUBLE
+using PackedRealArray = PackedFloat64Array;
+#else
+using PackedRealArray = PackedFloat32Array;
+#endif // REAL_T_IS_DOUBLE
+
 } // namespace godot
 
 #endif // GODOT_VARIANT_HPP

src/classes/wrapped.cpp

@@ -50,6 +50,12 @@ void Wrapped::_postinitialize() {
 		godot::internal::gdextension_interface_object_set_instance(_owner, reinterpret_cast<GDExtensionConstStringNamePtr>(extension_class), this);
 	}
 	godot::internal::gdextension_interface_object_set_instance_binding(_owner, godot::internal::token, this, _get_bindings_callbacks());
+	if (extension_class) {
+		Object *obj = dynamic_cast<Object *>(this);
+		if (obj) {
+			obj->notification(Object::NOTIFICATION_POSTINITIALIZE);
+		}
+	}
 }
 
 Wrapped::Wrapped(const StringName p_godot_class) {

src/godot.cpp

@@ -172,6 +172,7 @@ GDExtensionInterfaceObjectCastTo gdextension_interface_object_cast_to = nullptr;
 GDExtensionInterfaceObjectGetInstanceFromId gdextension_interface_object_get_instance_from_id = nullptr;
 GDExtensionInterfaceObjectGetInstanceId gdextension_interface_object_get_instance_id = nullptr;
 GDExtensionInterfaceCallableCustomCreate gdextension_interface_callable_custom_create = nullptr;
+GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata = nullptr;
 GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object = nullptr;
 GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object = nullptr;
 GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2 = nullptr;
@@ -195,9 +196,9 @@ GDExtensionInterfaceEditorRemovePlugin gdextension_interface_editor_remove_plugi
 
 } // namespace internal
 
-GDExtensionBinding::Callback GDExtensionBinding::init_callback = nullptr;
+bool GDExtensionBinding::api_initialized = false;
-GDExtensionBinding::Callback GDExtensionBinding::terminate_callback = nullptr;
+int GDExtensionBinding::level_initialized[MODULE_INITIALIZATION_LEVEL_MAX] = { 0 };
-GDExtensionInitializationLevel GDExtensionBinding::minimum_initialization_level = GDEXTENSION_INITIALIZATION_CORE;
+GDExtensionBinding::InitDataList GDExtensionBinding::initdata;
 
 #define ERR_PRINT_EARLY(m_msg) \
 	internal::gdextension_interface_print_error(m_msg, FUNCTION_STR, __FILE__, __LINE__, false)
@@ -224,7 +225,20 @@ typedef struct {
 	GDExtensionInterfacePrintErrorWithMessage print_error_with_message;
 } LegacyGDExtensionInterface;
 
-GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
+GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, InitData *p_init_data, GDExtensionInitialization *r_initialization) {
+	if (!p_init_data || !p_init_data->init_callback) {
+		ERR_FAIL_V_MSG(false, "Initialization callback must be defined.");
+	}
+
+	if (api_initialized) {
+		r_initialization->initialize = initialize_level;
+		r_initialization->deinitialize = deinitialize_level;
+		r_initialization->userdata = p_init_data;
+		r_initialization->minimum_initialization_level = p_init_data->minimum_initialization_level;
+
+		return true;
+	}
+
 	// Make sure we weren't passed the legacy struct.
 	uint32_t *raw_interface = (uint32_t *)(void *)p_get_proc_address;
 	if (raw_interface[0] == 4 && raw_interface[1] == 0) {
@@ -257,7 +271,12 @@ GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_ge
 	} else if (internal::godot_version.minor != GODOT_VERSION_MINOR) {
 		compatible = internal::godot_version.minor > GODOT_VERSION_MINOR;
 	} else {
+#if GODOT_VERSION_PATCH > 0
 		compatible = internal::godot_version.patch >= GODOT_VERSION_PATCH;
+#else
+		// Prevent -Wtype-limits warning due to unsigned comparison.
+		compatible = true;
+#endif
 	}
 	if (!compatible) {
 		// We need to use snprintf() here because vformat() uses Variant, and we haven't loaded
@@ -390,6 +409,7 @@ GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_ge
 	LOAD_PROC_ADDRESS(object_get_instance_from_id, GDExtensionInterfaceObjectGetInstanceFromId);
 	LOAD_PROC_ADDRESS(object_get_instance_id, GDExtensionInterfaceObjectGetInstanceId);
 	LOAD_PROC_ADDRESS(callable_custom_create, GDExtensionInterfaceCallableCustomCreate);
+	LOAD_PROC_ADDRESS(callable_custom_get_userdata, GDExtensionInterfaceCallableCustomGetUserData);
 	LOAD_PROC_ADDRESS(ref_get_object, GDExtensionInterfaceRefGetObject);
 	LOAD_PROC_ADDRESS(ref_set_object, GDExtensionInterfaceRefSetObject);
 	LOAD_PROC_ADDRESS(script_instance_create2, GDExtensionInterfaceScriptInstanceCreate2);
@@ -413,59 +433,96 @@ GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_ge
 
 	r_initialization->initialize = initialize_level;
 	r_initialization->deinitialize = deinitialize_level;
-	r_initialization->minimum_initialization_level = minimum_initialization_level;
+	r_initialization->userdata = p_init_data;
-
+	r_initialization->minimum_initialization_level = p_init_data->minimum_initialization_level;
-	ERR_FAIL_NULL_V_MSG(init_callback, false, "Initialization callback must be defined.");
 
 	Variant::init_bindings();
 	godot::internal::register_engine_classes();
 
+	api_initialized = true;
 	return true;
 }
 
 #undef LOAD_PROC_ADDRESS
 #undef ERR_PRINT_EARLY
 
-void GDExtensionBinding::initialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
+void GDExtensionBinding::initialize_level(void *p_userdata, GDExtensionInitializationLevel p_level) {
+	ERR_FAIL_COND(static_cast<ModuleInitializationLevel>(p_level) >= MODULE_INITIALIZATION_LEVEL_MAX);
 	ClassDB::current_level = p_level;
 
-	if (init_callback) {
+	InitData *init_data = static_cast<InitData *>(p_userdata);
-		init_callback(static_cast<ModuleInitializationLevel>(p_level));
+	if (init_data && init_data->init_callback) {
+		init_data->init_callback(static_cast<ModuleInitializationLevel>(p_level));
 	}
 
-	ClassDB::initialize(p_level);
+	if (level_initialized[p_level] == 0) {
+		ClassDB::initialize(p_level);
+	}
+	level_initialized[p_level]++;
 }
 
-void GDExtensionBinding::deinitialize_level(void *userdata, GDExtensionInitializationLevel p_level) {
+void GDExtensionBinding::deinitialize_level(void *p_userdata, GDExtensionInitializationLevel p_level) {
+	ERR_FAIL_COND(static_cast<ModuleInitializationLevel>(p_level) >= MODULE_INITIALIZATION_LEVEL_MAX);
 	ClassDB::current_level = p_level;
 
-	if (terminate_callback) {
+	InitData *init_data = static_cast<InitData *>(p_userdata);
-		terminate_callback(static_cast<ModuleInitializationLevel>(p_level));
+	if (init_data && init_data->terminate_callback) {
+		init_data->terminate_callback(static_cast<ModuleInitializationLevel>(p_level));
 	}
 
-	EditorPlugins::deinitialize(p_level);
+	level_initialized[p_level]--;
-	ClassDB::deinitialize(p_level);
+	if (level_initialized[p_level] == 0) {
+		EditorPlugins::deinitialize(p_level);
+		ClassDB::deinitialize(p_level);
+	}
 }
+
+void GDExtensionBinding::InitDataList::add(InitData *p_data) {
+	if (data_count == data_capacity) {
+		void *new_ptr = realloc(data, sizeof(InitData *) * (data_capacity + 32));
+		if (new_ptr) {
+			data = (InitData **)(new_ptr);
+			data_capacity += 32;
+		} else {
+			ERR_FAIL_MSG("Unable to allocate memory for extension callbacks.");
+		}
+	}
+	data[data_count++] = p_data;
+}
+
+GDExtensionBinding::InitDataList::~InitDataList() {
+	for (int i = 0; i < data_count; i++) {
+		if (data[i]) {
+			delete data[i];
+		}
+	}
+	if (data) {
+		free(data);
+	}
+}
+
 GDExtensionBinding::InitObject::InitObject(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
 	get_proc_address = p_get_proc_address;
 	library = p_library;
 	initialization = r_initialization;
+	init_data = new InitData();
+	GDExtensionBinding::initdata.add(init_data);
 }
 
 void GDExtensionBinding::InitObject::register_initializer(Callback p_init) const {
-	GDExtensionBinding::init_callback = p_init;
+	init_data->init_callback = p_init;
 }
 
 void GDExtensionBinding::InitObject::register_terminator(Callback p_terminate) const {
-	GDExtensionBinding::terminate_callback = p_terminate;
+	init_data->terminate_callback = p_terminate;
 }
 
 void GDExtensionBinding::InitObject::set_minimum_library_initialization_level(ModuleInitializationLevel p_level) const {
-	GDExtensionBinding::minimum_initialization_level = static_cast<GDExtensionInitializationLevel>(p_level);
+	init_data->minimum_initialization_level = static_cast<GDExtensionInitializationLevel>(p_level);
 }
 
 GDExtensionBool GDExtensionBinding::InitObject::init() const {
-	return GDExtensionBinding::init(get_proc_address, library, initialization);
+	return GDExtensionBinding::init(get_proc_address, library, init_data, initialization);
 }
 
 } // namespace godot

src/variant/callable_custom.cpp

@@ -0,0 +1,113 @@
+/**************************************************************************/
+/*  callable_custom.cpp                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include <godot_cpp/variant/callable_custom.hpp>
+
+#include <godot_cpp/core/object.hpp>
+#include <godot_cpp/variant/callable.hpp>
+
+namespace godot {
+
+static void callable_custom_call(void *p_userdata, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	callable_custom->call((const Variant **)p_args, p_argument_count, *(Variant *)r_return, *r_error);
+}
+
+static GDExtensionBool callable_custom_is_valid(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	return callable_custom->is_valid();
+}
+
+static void callable_custom_free(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	memdelete(callable_custom);
+}
+
+static uint32_t callable_custom_hash(void *p_userdata) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	return callable_custom->hash();
+}
+
+static void callable_custom_to_string(void *p_userdata, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out) {
+	CallableCustom *callable_custom = (CallableCustom *)p_userdata;
+	*((String *)r_out) = callable_custom->get_as_text();
+	*r_is_valid = true;
+}
+
+static GDExtensionBool callable_custom_equal_func(void *p_a, void *p_b) {
+	CallableCustom *a = (CallableCustom *)p_a;
+	CallableCustom *b = (CallableCustom *)p_b;
+	CallableCustom::CompareEqualFunc func_a = a->get_compare_equal_func();
+	CallableCustom::CompareEqualFunc func_b = b->get_compare_equal_func();
+	if (func_a != func_b) {
+		return false;
+	}
+	return func_a(a, b);
+}
+
+static GDExtensionBool callable_custom_less_than_func(void *p_a, void *p_b) {
+	CallableCustom *a = (CallableCustom *)p_a;
+	CallableCustom *b = (CallableCustom *)p_b;
+	CallableCustom::CompareEqualFunc func_a = a->get_compare_less_func();
+	CallableCustom::CompareEqualFunc func_b = b->get_compare_less_func();
+	if (func_a != func_b) {
+		// Just compare the addresses.
+		return p_a < p_b;
+	}
+	return func_a(a, b);
+}
+
+bool CallableCustom::is_valid() const {
+	// The same default implementation as in Godot.
+	return ObjectDB::get_instance(get_object());
+}
+
+Callable::Callable(CallableCustom *p_callable_custom) {
+	GDExtensionCallableCustomInfo info = {};
+	info.callable_userdata = p_callable_custom;
+	info.token = internal::token;
+	info.object_id = p_callable_custom->get_object();
+	info.call_func = &callable_custom_call;
+	info.is_valid_func = &callable_custom_is_valid;
+	info.free_func = &callable_custom_free;
+	info.hash_func = &callable_custom_hash;
+	info.equal_func = &callable_custom_equal_func;
+	info.less_than_func = &callable_custom_less_than_func;
+	info.to_string_func = &callable_custom_to_string;
+
+	::godot::internal::gdextension_interface_callable_custom_create(_native_ptr(), &info);
+}
+
+CallableCustom *Callable::get_custom() const {
+	CallableCustomBase *callable_custom = (CallableCustomBase *)::godot::internal::gdextension_interface_callable_custom_get_userdata(_native_ptr(), internal::token);
+	return dynamic_cast<CallableCustom *>(callable_custom);
+}
+
+} // namespace godot

src/variant/callable_method_pointer.cpp

@@ -30,31 +30,79 @@
 
 #include <godot_cpp/variant/callable_method_pointer.hpp>
 
-//#include <godot_cpp/godot.hpp>
+#include <godot_cpp/templates/hashfuncs.hpp>
 
 namespace godot {
 
-static void call_custom_callable(void *userdata, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error) {
+static void custom_callable_mp_call(void *p_userdata, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error) {
-	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)userdata;
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
 	callable_method_pointer->call((const Variant **)p_args, p_argument_count, *(Variant *)r_return, *r_error);
 }
 
-static void free_custom_callable(void *userdata) {
+static GDExtensionBool custom_callable_mp_is_valid(void *p_userdata) {
-	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)userdata;
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	ObjectID object = callable_method_pointer->get_object();
+	return object == ObjectID() || ObjectDB::get_instance(object);
+}
+
+static void custom_callable_mp_free(void *p_userdata) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
 	memdelete(callable_method_pointer);
 }
 
+static uint32_t custom_callable_mp_hash(void *p_userdata) {
+	CallableCustomMethodPointerBase *callable_method_pointer = (CallableCustomMethodPointerBase *)p_userdata;
+	return callable_method_pointer->get_hash();
+}
+
+static GDExtensionBool custom_callable_mp_equal_func(void *p_a, void *p_b) {
+	CallableCustomMethodPointerBase *a = (CallableCustomMethodPointerBase *)p_a;
+	CallableCustomMethodPointerBase *b = (CallableCustomMethodPointerBase *)p_b;
+
+	if (a->get_comp_size() != b->get_comp_size()) {
+		return false;
+	}
+
+	return memcmp(a->get_comp_ptr(), b->get_comp_ptr(), a->get_comp_size() * 4) == 0;
+}
+
+static GDExtensionBool custom_callable_mp_less_than_func(void *p_a, void *p_b) {
+	CallableCustomMethodPointerBase *a = (CallableCustomMethodPointerBase *)p_a;
+	CallableCustomMethodPointerBase *b = (CallableCustomMethodPointerBase *)p_b;
+
+	if (a->get_comp_size() != b->get_comp_size()) {
+		return a->get_comp_size() < b->get_comp_size();
+	}
+
+	return memcmp(a->get_comp_ptr(), b->get_comp_ptr(), a->get_comp_size() * 4) < 0;
+}
+
+void CallableCustomMethodPointerBase::_setup(uint32_t *p_base_ptr, uint32_t p_ptr_size) {
+	comp_ptr = p_base_ptr;
+	comp_size = p_ptr_size / 4;
+
+	for (uint32_t i = 0; i < comp_size; i++) {
+		if (i == 0) {
+			h = hash_murmur3_one_32(comp_ptr[i]);
+		} else {
+			h = hash_murmur3_one_32(comp_ptr[i], h);
+		}
+	}
+}
+
 namespace internal {
 
-Callable create_custom_callable(CallableCustomMethodPointerBase *p_callable_method_pointer) {
+Callable create_callable_from_ccmp(CallableCustomMethodPointerBase *p_callable_method_pointer) {
-	Object *object = p_callable_method_pointer->get_object();
-
 	GDExtensionCallableCustomInfo info = {};
 	info.callable_userdata = p_callable_method_pointer;
 	info.token = internal::token;
-	info.object_id = object ? object->get_instance_id() : 0;
+	info.object_id = p_callable_method_pointer->get_object();
-	info.call_func = &call_custom_callable;
+	info.call_func = &custom_callable_mp_call;
-	info.free_func = &free_custom_callable;
+	info.is_valid_func = &custom_callable_mp_is_valid;
+	info.free_func = &custom_callable_mp_free;
+	info.hash_func = &custom_callable_mp_hash;
+	info.equal_func = &custom_callable_mp_equal_func;
+	info.less_than_func = &custom_callable_mp_less_than_func;
 
 	Callable callable;
 	::godot::internal::gdextension_interface_callable_custom_create(callable._native_ptr(), &info);

src/variant/variant.cpp

@@ -268,6 +268,14 @@ Variant::operator int32_t() const {
 	return static_cast<int32_t>(operator int64_t());
 }
 
+Variant::operator int16_t() const {
+	return static_cast<int16_t>(operator int64_t());
+}
+
+Variant::operator int8_t() const {
+	return static_cast<int8_t>(operator int64_t());
+}
+
 Variant::operator uint64_t() const {
 	return static_cast<uint64_t>(operator int64_t());
 }
@@ -276,6 +284,14 @@ Variant::operator uint32_t() const {
 	return static_cast<uint32_t>(operator int64_t());
 }
 
+Variant::operator uint16_t() const {
+	return static_cast<uint16_t>(operator int64_t());
+}
+
+Variant::operator uint8_t() const {
+	return static_cast<uint8_t>(operator int64_t());
+}
+
 Variant::operator double() const {
 	double result;
 	to_type_constructor[FLOAT](&result, _native_ptr());

test/CMakeLists.txt

@@ -59,31 +59,9 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 
 else()
 
-#elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-	# using Clang
-#elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-	# using GCC and maybe MinGW?
-
 	set(GODOT_LINKER_FLAGS "-static-libgcc -static-libstdc++ -Wl,-R,'$$ORIGIN'")
 
-	# Hmm.. maybe to strikt?
 	set(GODOT_COMPILE_FLAGS "-fPIC -g -Wwrite-strings")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wchar-subscripts -Wcomment -Wdisabled-optimization")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wformat -Wformat=2 -Wformat-security -Wformat-y2k")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wimport -Winit-self -Winline -Winvalid-pch -Werror")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wmissing-braces -Wmissing-format-attribute")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wmissing-include-dirs -Wmissing-noreturn -Wpacked -Wpointer-arith")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wredundant-decls -Wreturn-type -Wsequence-point")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wswitch -Wswitch-enum -Wtrigraphs")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wuninitialized -Wunknown-pragmas -Wunreachable-code -Wunused-label")
-	set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wunused-value -Wvariadic-macros -Wvolatile-register-var -Wno-error=attributes")
-
-	# -Wshadow -Wextra -Wall -Weffc++ -Wfloat-equal -Wstack-protector -Wunused-parameter -Wsign-compare -Wunused-variable -Wcast-align
-	# -Wunused-function -Wstrict-aliasing -Wstrict-aliasing=2 -Wmissing-field-initializers
-
-	if(NOT CMAKE_SYSTEM_NAME STREQUAL "Android")
-		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wno-ignored-attributes")
-	endif()
 
 	if(CMAKE_BUILD_TYPE MATCHES Debug)
 		set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0")

test/project/main.gd

@@ -101,9 +101,20 @@ func _ready():
 
 	# mp_callable() with void method.
 	var mp_callable: Callable = example.test_callable_mp()
+	assert_equal(mp_callable.is_valid(), true)
 	mp_callable.call(example, "void", 36)
 	assert_equal(custom_signal_emitted, ["unbound_method1: Example - void", 36])
 
+	# Check that it works with is_connected().
+	assert_equal(example.renamed.is_connected(mp_callable), false)
+	example.renamed.connect(mp_callable)
+	assert_equal(example.renamed.is_connected(mp_callable), true)
+	# Make sure a new object is still treated as equivalent.
+	assert_equal(example.renamed.is_connected(example.test_callable_mp()), true)
+	assert_equal(mp_callable.hash(), example.test_callable_mp().hash())
+	example.renamed.disconnect(mp_callable)
+	assert_equal(example.renamed.is_connected(mp_callable), false)
+
 	# mp_callable() with return value.
 	var mp_callable_ret: Callable = example.test_callable_mp_ret()
 	assert_equal(mp_callable_ret.call(example, "test", 77), "unbound_method2: Example - test - 77")
@@ -117,10 +128,30 @@ func _ready():
 	mp_callable_static.call(example, "static", 83)
 	assert_equal(custom_signal_emitted, ["unbound_static_method1: Example - static", 83])
 
+	# Check that it works with is_connected().
+	assert_equal(example.renamed.is_connected(mp_callable_static), false)
+	example.renamed.connect(mp_callable_static)
+	assert_equal(example.renamed.is_connected(mp_callable_static), true)
+	# Make sure a new object is still treated as equivalent.
+	assert_equal(example.renamed.is_connected(example.test_callable_mp_static()), true)
+	assert_equal(mp_callable_static.hash(), example.test_callable_mp_static().hash())
+	example.renamed.disconnect(mp_callable_static)
+	assert_equal(example.renamed.is_connected(mp_callable_static), false)
+
 	# mp_callable_static() with return value.
 	var mp_callable_static_ret: Callable = example.test_callable_mp_static_ret()
 	assert_equal(mp_callable_static_ret.call(example, "static-ret", 84), "unbound_static_method2: Example - static-ret - 84")
 
+	# CallableCustom.
+	var custom_callable: Callable = example.test_custom_callable();
+	assert_equal(custom_callable.is_custom(), true);
+	assert_equal(custom_callable.is_valid(), true);
+	assert_equal(custom_callable.call(), "Hi")
+	assert_equal(custom_callable.hash(), 27);
+	assert_equal(custom_callable.get_object(), null);
+	assert_equal(custom_callable.get_method(), "");
+	assert_equal(str(custom_callable), "<MyCallableCustom>");
+
 	# PackedArray iterators
 	assert_equal(example.test_vector_ops(), 105)
 
@@ -205,6 +236,11 @@ func _ready():
 	get_viewport().push_input(event)
 	assert_equal(custom_signal_emitted, ["_input: H", 72])
 
+	# Check NOTIFICATION_POST_INITIALIZED, both when created from GDScript and godot-cpp.
+	var new_example_ref = ExampleRef.new()
+	assert_equal(new_example_ref.was_post_initialized(), true)
+	assert_equal(example.test_post_initialize(), true)
+
 	exit_with_status()
 
 func _on_Example_custom_signal(signal_name, value):

test/src/example.cpp

@@ -15,6 +15,46 @@
 
 using namespace godot;
 
+class MyCallableCustom : public CallableCustom {
+public:
+	virtual uint32_t hash() const {
+		return 27;
+	}
+
+	virtual String get_as_text() const {
+		return "<MyCallableCustom>";
+	}
+
+	static bool compare_equal_func(const CallableCustom *p_a, const CallableCustom *p_b) {
+		return p_a == p_b;
+	}
+
+	virtual CompareEqualFunc get_compare_equal_func() const {
+		return &MyCallableCustom::compare_equal_func;
+	}
+
+	static bool compare_less_func(const CallableCustom *p_a, const CallableCustom *p_b) {
+		return (void *)p_a < (void *)p_b;
+	}
+
+	virtual CompareLessFunc get_compare_less_func() const {
+		return &MyCallableCustom::compare_less_func;
+	}
+
+	bool is_valid() const {
+		return true;
+	}
+
+	virtual ObjectID get_object() const {
+		return ObjectID();
+	}
+
+	virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, GDExtensionCallError &r_call_error) const {
+		r_return_value = "Hi";
+		r_call_error.error = GDEXTENSION_CALL_OK;
+	}
+};
+
 void ExampleRef::set_id(int p_id) {
 	id = p_id;
 }
@@ -23,10 +63,18 @@ int ExampleRef::get_id() const {
 	return id;
 }
 
+void ExampleRef::_notification(int p_what) {
+	if (p_what == NOTIFICATION_POSTINITIALIZE) {
+		post_initialized = true;
+	}
+}
+
 void ExampleRef::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_id", "id"), &ExampleRef::set_id);
 	ClassDB::bind_method(D_METHOD("get_id"), &ExampleRef::get_id);
 
+	ClassDB::bind_method(D_METHOD("was_post_initialized"), &ExampleRef::was_post_initialized);
+
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "id"), "set_id", "get_id");
 }
 
@@ -168,6 +216,7 @@ void Example::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("test_callable_mp_retc"), &Example::test_callable_mp_retc);
 	ClassDB::bind_method(D_METHOD("test_callable_mp_static"), &Example::test_callable_mp_static);
 	ClassDB::bind_method(D_METHOD("test_callable_mp_static_ret"), &Example::test_callable_mp_static_ret);
+	ClassDB::bind_method(D_METHOD("test_custom_callable"), &Example::test_custom_callable);
 
 	ClassDB::bind_method(D_METHOD("test_bitfield", "flags"), &Example::test_bitfield);
 
@@ -179,6 +228,7 @@ void Example::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("def_args", "a", "b"), &Example::def_args, DEFVAL(100), DEFVAL(200));
 	ClassDB::bind_method(D_METHOD("callable_bind"), &Example::callable_bind);
+	ClassDB::bind_method(D_METHOD("test_post_initialize"), &Example::test_post_initialize);
 
 	ClassDB::bind_static_method("Example", D_METHOD("test_static", "a", "b"), &Example::test_static);
 	ClassDB::bind_static_method("Example", D_METHOD("test_static2"), &Example::test_static2);
@@ -378,6 +428,10 @@ Callable Example::test_callable_mp_static_ret() const {
 	return callable_mp_static(&Example::unbound_static_method2);
 }
 
+Callable Example::test_custom_callable() const {
+	return Callable(memnew(MyCallableCustom));
+}
+
 void Example::unbound_method1(Object *p_object, String p_string, int p_int) {
 	String test = "unbound_method1: ";
 	test += p_object->get_class();
@@ -552,6 +606,12 @@ Vector4 Example::get_v4() const {
 	return Vector4(1.2, 3.4, 5.6, 7.8);
 }
 
+bool Example::test_post_initialize() const {
+	Ref<ExampleRef> new_example_ref;
+	new_example_ref.instantiate();
+	return new_example_ref->was_post_initialized();
+}
+
 // Virtual function override.
 bool Example::_has_point(const Vector2 &point) const {
 	Label *label = get_node<Label>("Label");

test/src/example.h

@@ -35,16 +35,21 @@ private:
 	static int last_id;
 
 	int id;
+	bool post_initialized = false;
 
 protected:
 	static void _bind_methods();
 
+	void _notification(int p_what);
+
 public:
 	ExampleRef();
 	~ExampleRef();
 
 	void set_id(int p_id);
 	int get_id() const;
+
+	bool was_post_initialized() const { return post_initialized; }
 };
 
 class ExampleMin : public Control {
@@ -143,6 +148,7 @@ public:
 	Callable test_callable_mp_retc() const;
 	Callable test_callable_mp_static() const;
 	Callable test_callable_mp_static_ret() const;
+	Callable test_custom_callable() const;
 
 	void unbound_method1(Object *p_object, String p_string, int p_int);
 	String unbound_method2(Object *p_object, String p_string, int p_int);
@@ -166,6 +172,8 @@ public:
 	Vector2 get_custom_position() const;
 	Vector4 get_v4() const;
 
+	bool test_post_initialize() const;
+
 	// Static method.
 	static int test_static(int p_a, int p_b);
 	static void test_static2();

tools/android.py

@@ -8,7 +8,7 @@ def options(opts):
     opts.Add(
         "android_api_level",
         "Target Android API level",
-        "18" if "32" in ARGUMENTS.get("arch", "arm64") else "21",
+        "21",
     )
     opts.Add(
         "ANDROID_HOME",
@@ -47,11 +47,9 @@ def generate(env):
         my_spawn.configure(env)
 
     # Validate API level
-    api_level = int(env["android_api_level"])
+    if int(env["android_api_level"]) < 21:
-    if "64" in env["arch"] and api_level < 21:
+        print("WARNING: minimum supported Android target api is 21. Forcing target api 21.")
-        print("WARN: 64-bit Android architectures require an API level of at least 21; setting android_api_level=21")
         env["android_api_level"] = "21"
-        api_level = 21
 
     # Setup toolchain
     toolchain = get_android_ndk_root(env) + "/toolchains/llvm/prebuilt/"

tools/godotcpp.py

@@ -189,6 +189,15 @@ def options(opts, env):
         )
     )
 
+    opts.Add(
+        EnumVariable(
+            key="symbols_visibility",
+            help="Symbols visibility on GNU platforms. Use 'auto' to apply the default value.",
+            default=env.get("symbols_visibility", "hidden"),
+            allowed_values=["auto", "visible", "hidden"],
+        )
+    )
+
     # Add platform options
     for pl in platforms:
         tool = Tool(pl, toolpath=["tools"])
@@ -269,6 +278,14 @@ def generate(env):
     elif env.get("is_msvc", False):
         env.Append(CXXFLAGS=["/EHsc"])
 
+    if not env.get("is_msvc", False):
+        if env["symbols_visibility"] == "visible":
+            env.Append(CCFLAGS=["-fvisibility=default"])
+            env.Append(LINKFLAGS=["-fvisibility=default"])
+        elif env["symbols_visibility"] == "hidden":
+            env.Append(CCFLAGS=["-fvisibility=hidden"])
+            env.Append(LINKFLAGS=["-fvisibility=hidden"])
+
     # Require C++17
     if env.get("is_msvc", False):
         env.Append(CXXFLAGS=["/std:c++17"])

tools/ios.py

@@ -21,7 +21,7 @@ def has_ios_osxcross():
 
 def options(opts):
     opts.Add(BoolVariable("ios_simulator", "Target iOS Simulator", False))
-    opts.Add("ios_min_version", "Target minimum iphoneos/iphonesimulator version", "10.0")
+    opts.Add("ios_min_version", "Target minimum iphoneos/iphonesimulator version", "12.0")
     opts.Add(
         "IOS_TOOLCHAIN_PATH",
         "Path to iOS toolchain",