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gdextension.cpp
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/**************************************************************************/
/* gdextension.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 "gdextension.h"
#include "gdextension.compat.inc"
#include "core/config/project_settings.h"
#include "core/object/class_db.h"
#include "core/object/method_bind.h"
#include "gdextension_library_loader.h"
#include "gdextension_manager.h"
extern void gdextension_setup_interface();
extern GDExtensionInterfaceFunctionPtr gdextension_get_proc_address(const char *p_name);
typedef GDExtensionBool (*GDExtensionLegacyInitializationFunction)(void *p_interface, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization);
String GDExtension::get_extension_list_config_file() {
return ProjectSettings::get_singleton()->get_project_data_path().path_join("extension_list.cfg");
}
class GDExtensionMethodBind : public MethodBind {
GDExtensionClassMethodCall call_func;
GDExtensionClassMethodValidatedCall validated_call_func;
GDExtensionClassMethodPtrCall ptrcall_func;
void *method_userdata;
bool vararg;
uint32_t argument_count;
PropertyInfo return_value_info;
GodotTypeInfo::Metadata return_value_metadata;
List<PropertyInfo> arguments_info;
List<GodotTypeInfo::Metadata> arguments_metadata;
#ifdef TOOLS_ENABLED
friend class GDExtension;
StringName name;
bool is_reloading = false;
bool valid = true;
#endif
protected:
virtual Variant::Type _gen_argument_type(int p_arg) const override {
if (p_arg < 0) {
return return_value_info.type;
} else {
return arguments_info.get(p_arg).type;
}
}
virtual PropertyInfo _gen_argument_type_info(int p_arg) const override {
if (p_arg < 0) {
return return_value_info;
} else {
return arguments_info.get(p_arg);
}
}
public:
#ifdef TOOLS_ENABLED
virtual bool is_valid() const override { return valid; }
#endif
#ifdef DEBUG_METHODS_ENABLED
virtual GodotTypeInfo::Metadata get_argument_meta(int p_arg) const override {
if (p_arg < 0) {
return return_value_metadata;
} else {
return arguments_metadata.get(p_arg);
}
}
#endif
virtual Variant call(Object *p_object, const Variant **p_args, int p_arg_count, Callable::CallError &r_error) const override {
#ifdef TOOLS_ENABLED
ERR_FAIL_COND_V_MSG(!valid, Variant(), vformat("Cannot call invalid GDExtension method bind '%s'. It's probably cached - you may need to restart Godot.", name));
ERR_FAIL_COND_V_MSG(p_object && p_object->is_extension_placeholder(), Variant(), vformat("Cannot call GDExtension method bind '%s' on placeholder instance.", name));
#endif
Variant ret;
GDExtensionClassInstancePtr extension_instance = is_static() ? nullptr : p_object->_get_extension_instance();
GDExtensionCallError ce{ GDEXTENSION_CALL_OK, 0, 0 };
call_func(method_userdata, extension_instance, reinterpret_cast<GDExtensionConstVariantPtr *>(p_args), p_arg_count, (GDExtensionVariantPtr)&ret, &ce);
r_error.error = Callable::CallError::Error(ce.error);
r_error.argument = ce.argument;
r_error.expected = ce.expected;
return ret;
}
virtual void validated_call(Object *p_object, const Variant **p_args, Variant *r_ret) const override {
#ifdef TOOLS_ENABLED
ERR_FAIL_COND_MSG(!valid, vformat("Cannot call invalid GDExtension method bind '%s'. It's probably cached - you may need to restart Godot.", name));
ERR_FAIL_COND_MSG(p_object && p_object->is_extension_placeholder(), vformat("Cannot call GDExtension method bind '%s' on placeholder instance.", name));
#endif
ERR_FAIL_COND_MSG(vararg, "Vararg methods don't have validated call support. This is most likely an engine bug.");
GDExtensionClassInstancePtr extension_instance = is_static() ? nullptr : p_object->_get_extension_instance();
if (validated_call_func) {
// This is added here, but it's unlikely to be provided by most extensions.
validated_call_func(method_userdata, extension_instance, reinterpret_cast<GDExtensionConstVariantPtr *>(p_args), (GDExtensionVariantPtr)r_ret);
} else {
// If not provided, go via ptrcall, which is faster than resorting to regular call.
const void **argptrs = (const void **)alloca(argument_count * sizeof(void *));
for (uint32_t i = 0; i < argument_count; i++) {
argptrs[i] = VariantInternal::get_opaque_pointer(p_args[i]);
}
void *ret_opaque = nullptr;
if (r_ret) {
VariantInternal::initialize(r_ret, return_value_info.type);
ret_opaque = r_ret->get_type() == Variant::NIL ? r_ret : VariantInternal::get_opaque_pointer(r_ret);
}
ptrcall_func(method_userdata, extension_instance, reinterpret_cast<GDExtensionConstTypePtr *>(argptrs), (GDExtensionTypePtr)ret_opaque);
if (r_ret && r_ret->get_type() == Variant::OBJECT) {
VariantInternal::update_object_id(r_ret);
}
}
}
virtual void ptrcall(Object *p_object, const void **p_args, void *r_ret) const override {
#ifdef TOOLS_ENABLED
ERR_FAIL_COND_MSG(!valid, vformat("Cannot call invalid GDExtension method bind '%s'. It's probably cached - you may need to restart Godot.", name));
ERR_FAIL_COND_MSG(p_object && p_object->is_extension_placeholder(), vformat("Cannot call GDExtension method bind '%s' on placeholder instance.", name));
#endif
ERR_FAIL_COND_MSG(vararg, "Vararg methods don't have ptrcall support. This is most likely an engine bug.");
GDExtensionClassInstancePtr extension_instance = is_static() ? nullptr : p_object->_get_extension_instance();
ptrcall_func(method_userdata, extension_instance, reinterpret_cast<GDExtensionConstTypePtr *>(p_args), (GDExtensionTypePtr)r_ret);
}
virtual bool is_vararg() const override {
return vararg;
}
#ifdef TOOLS_ENABLED
bool try_update(const GDExtensionClassMethodInfo *p_method_info) {
if (is_static() != (bool)(p_method_info->method_flags & GDEXTENSION_METHOD_FLAG_STATIC)) {
return false;
}
if (vararg != (bool)(p_method_info->method_flags & GDEXTENSION_METHOD_FLAG_VARARG)) {
return false;
}
if (has_return() != (bool)p_method_info->has_return_value) {
return false;
}
if (has_return() && return_value_info.type != (Variant::Type)p_method_info->return_value_info->type) {
return false;
}
if (argument_count != p_method_info->argument_count) {
return false;
}
List<PropertyInfo>::ConstIterator itr = arguments_info.begin();
for (uint32_t i = 0; i < p_method_info->argument_count; ++itr, ++i) {
if (itr->type != (Variant::Type)p_method_info->arguments_info[i].type) {
return false;
}
}
update(p_method_info);
return true;
}
#endif
void update(const GDExtensionClassMethodInfo *p_method_info) {
#ifdef TOOLS_ENABLED
name = *reinterpret_cast<StringName *>(p_method_info->name);
#endif
method_userdata = p_method_info->method_userdata;
call_func = p_method_info->call_func;
validated_call_func = nullptr;
ptrcall_func = p_method_info->ptrcall_func;
set_name(*reinterpret_cast<StringName *>(p_method_info->name));
if (p_method_info->has_return_value) {
return_value_info = PropertyInfo(*p_method_info->return_value_info);
return_value_metadata = GodotTypeInfo::Metadata(p_method_info->return_value_metadata);
}
arguments_info.clear();
arguments_metadata.clear();
for (uint32_t i = 0; i < p_method_info->argument_count; i++) {
arguments_info.push_back(PropertyInfo(p_method_info->arguments_info[i]));
arguments_metadata.push_back(GodotTypeInfo::Metadata(p_method_info->arguments_metadata[i]));
}
set_hint_flags(p_method_info->method_flags);
argument_count = p_method_info->argument_count;
vararg = p_method_info->method_flags & GDEXTENSION_METHOD_FLAG_VARARG;
_set_returns(p_method_info->has_return_value);
_set_const(p_method_info->method_flags & GDEXTENSION_METHOD_FLAG_CONST);
_set_static(p_method_info->method_flags & GDEXTENSION_METHOD_FLAG_STATIC);
#ifdef DEBUG_METHODS_ENABLED
_generate_argument_types(p_method_info->argument_count);
#endif
set_argument_count(p_method_info->argument_count);
Vector<Variant> defargs;
defargs.resize(p_method_info->default_argument_count);
for (uint32_t i = 0; i < p_method_info->default_argument_count; i++) {
defargs.write[i] = *static_cast<Variant *>(p_method_info->default_arguments[i]);
}
set_default_arguments(defargs);
}
explicit GDExtensionMethodBind(const GDExtensionClassMethodInfo *p_method_info) {
update(p_method_info);
}
};
#ifndef DISABLE_DEPRECATED
void GDExtension::_register_extension_class(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_parent_class_name, const GDExtensionClassCreationInfo *p_extension_funcs) {
const GDExtensionClassCreationInfo4 class_info4 = {
p_extension_funcs->is_virtual, // GDExtensionBool is_virtual;
p_extension_funcs->is_abstract, // GDExtensionBool is_abstract;
true, // GDExtensionBool is_exposed;
false, // GDExtensionBool is_runtime;
nullptr, // GDExtensionConstStringPtr icon_path;
p_extension_funcs->set_func, // GDExtensionClassSet set_func;
p_extension_funcs->get_func, // GDExtensionClassGet get_func;
p_extension_funcs->get_property_list_func, // GDExtensionClassGetPropertyList get_property_list_func;
nullptr, // GDExtensionClassFreePropertyList2 free_property_list_func;
p_extension_funcs->property_can_revert_func, // GDExtensionClassPropertyCanRevert property_can_revert_func;
p_extension_funcs->property_get_revert_func, // GDExtensionClassPropertyGetRevert property_get_revert_func;
nullptr, // GDExtensionClassValidateProperty validate_property_func;
nullptr, // GDExtensionClassNotification2 notification_func;
p_extension_funcs->to_string_func, // GDExtensionClassToString to_string_func;
p_extension_funcs->reference_func, // GDExtensionClassReference reference_func;
p_extension_funcs->unreference_func, // GDExtensionClassUnreference unreference_func;
nullptr, // GDExtensionClassCreateInstance2 create_instance_func; /* this one is mandatory */
p_extension_funcs->free_instance_func, // GDExtensionClassFreeInstance free_instance_func; /* this one is mandatory */
nullptr, // GDExtensionClassRecreateInstance recreate_instance_func;
nullptr, // GDExtensionClassGetVirtual get_virtual_func;
nullptr, // GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
nullptr, // GDExtensionClassCallVirtualWithData call_virtual_func;
p_extension_funcs->class_userdata, // void *class_userdata;
};
const ClassCreationDeprecatedInfo legacy = {
p_extension_funcs->notification_func, // GDExtensionClassNotification notification_func;
p_extension_funcs->free_property_list_func, // GDExtensionClassFreePropertyList free_property_list_func;
p_extension_funcs->create_instance_func, // GDExtensionClassCreateInstance create_instance_func;
p_extension_funcs->get_rid_func, // GDExtensionClassGetRID get_rid;
p_extension_funcs->get_virtual_func, // GDExtensionClassGetVirtual get_virtual_func;
nullptr,
};
_register_extension_class_internal(p_library, p_class_name, p_parent_class_name, &class_info4, &legacy);
}
void GDExtension::_register_extension_class2(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_parent_class_name, const GDExtensionClassCreationInfo2 *p_extension_funcs) {
const GDExtensionClassCreationInfo4 class_info4 = {
p_extension_funcs->is_virtual, // GDExtensionBool is_virtual;
p_extension_funcs->is_abstract, // GDExtensionBool is_abstract;
p_extension_funcs->is_exposed, // GDExtensionBool is_exposed;
false, // GDExtensionBool is_runtime;
nullptr, // GDExtensionConstStringPtr icon_path;
p_extension_funcs->set_func, // GDExtensionClassSet set_func;
p_extension_funcs->get_func, // GDExtensionClassGet get_func;
p_extension_funcs->get_property_list_func, // GDExtensionClassGetPropertyList get_property_list_func;
nullptr, // GDExtensionClassFreePropertyList2 free_property_list_func;
p_extension_funcs->property_can_revert_func, // GDExtensionClassPropertyCanRevert property_can_revert_func;
p_extension_funcs->property_get_revert_func, // GDExtensionClassPropertyGetRevert property_get_revert_func;
p_extension_funcs->validate_property_func, // GDExtensionClassValidateProperty validate_property_func;
p_extension_funcs->notification_func, // GDExtensionClassNotification2 notification_func;
p_extension_funcs->to_string_func, // GDExtensionClassToString to_string_func;
p_extension_funcs->reference_func, // GDExtensionClassReference reference_func;
p_extension_funcs->unreference_func, // GDExtensionClassUnreference unreference_func;
nullptr, // GDExtensionClassCreateInstance2 create_instance_func; /* this one is mandatory */
p_extension_funcs->free_instance_func, // GDExtensionClassFreeInstance free_instance_func; /* this one is mandatory */
p_extension_funcs->recreate_instance_func, // GDExtensionClassRecreateInstance recreate_instance_func;
nullptr, // GDExtensionClassGetVirtual get_virtual_func;
nullptr, // GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
p_extension_funcs->call_virtual_with_data_func, // GDExtensionClassCallVirtualWithData call_virtual_func;
p_extension_funcs->class_userdata, // void *class_userdata;
};
const ClassCreationDeprecatedInfo legacy = {
nullptr, // GDExtensionClassNotification notification_func;
p_extension_funcs->free_property_list_func, // GDExtensionClassFreePropertyList free_property_list_func;
p_extension_funcs->create_instance_func, // GDExtensionClassCreateInstance create_instance_func;
p_extension_funcs->get_rid_func, // GDExtensionClassGetRID get_rid;
p_extension_funcs->get_virtual_func, // GDExtensionClassGetVirtual get_virtual_func;
p_extension_funcs->get_virtual_call_data_func, // GDExtensionClassGetVirtual get_virtual_func;
};
_register_extension_class_internal(p_library, p_class_name, p_parent_class_name, &class_info4, &legacy);
}
void GDExtension::_register_extension_class3(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_parent_class_name, const GDExtensionClassCreationInfo3 *p_extension_funcs) {
const GDExtensionClassCreationInfo4 class_info4 = {
p_extension_funcs->is_virtual, // GDExtensionBool is_virtual;
p_extension_funcs->is_abstract, // GDExtensionBool is_abstract;
p_extension_funcs->is_exposed, // GDExtensionBool is_exposed;
p_extension_funcs->is_runtime, // GDExtensionBool is_runtime;
nullptr, // GDExtensionConstStringPtr icon_path;
p_extension_funcs->set_func, // GDExtensionClassSet set_func;
p_extension_funcs->get_func, // GDExtensionClassGet get_func;
p_extension_funcs->get_property_list_func, // GDExtensionClassGetPropertyList get_property_list_func;
p_extension_funcs->free_property_list_func, // GDExtensionClassFreePropertyList free_property_list_func;
p_extension_funcs->property_can_revert_func, // GDExtensionClassPropertyCanRevert property_can_revert_func;
p_extension_funcs->property_get_revert_func, // GDExtensionClassPropertyGetRevert property_get_revert_func;
p_extension_funcs->validate_property_func, // GDExtensionClassValidateProperty validate_property_func;
p_extension_funcs->notification_func, // GDExtensionClassNotification2 notification_func;
p_extension_funcs->to_string_func, // GDExtensionClassToString to_string_func;
p_extension_funcs->reference_func, // GDExtensionClassReference reference_func;
p_extension_funcs->unreference_func, // GDExtensionClassUnreference unreference_func;
nullptr, // GDExtensionClassCreateInstance2 create_instance_func; /* this one is mandatory */
p_extension_funcs->free_instance_func, // GDExtensionClassFreeInstance free_instance_func; /* this one is mandatory */
p_extension_funcs->recreate_instance_func, // GDExtensionClassRecreateInstance recreate_instance_func;
nullptr, // GDExtensionClassGetVirtual get_virtual_func;
nullptr, // GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
p_extension_funcs->call_virtual_with_data_func, // GDExtensionClassCallVirtualWithData call_virtual_func;
p_extension_funcs->class_userdata, // void *class_userdata;
};
const ClassCreationDeprecatedInfo legacy = {
nullptr, // GDExtensionClassNotification notification_func;
nullptr, // GDExtensionClassFreePropertyList free_property_list_func;
p_extension_funcs->create_instance_func, // GDExtensionClassCreateInstance2 create_instance_func;
p_extension_funcs->get_rid_func, // GDExtensionClassGetRID get_rid;
p_extension_funcs->get_virtual_func, // GDExtensionClassGetVirtual get_virtual_func;
p_extension_funcs->get_virtual_call_data_func, // GDExtensionClassGetVirtual get_virtual_func;
};
_register_extension_class_internal(p_library, p_class_name, p_parent_class_name, &class_info4, &legacy);
}
#endif // DISABLE_DEPRECATED
void GDExtension::_register_extension_class4(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_parent_class_name, const GDExtensionClassCreationInfo4 *p_extension_funcs) {
_register_extension_class_internal(p_library, p_class_name, p_parent_class_name, p_extension_funcs);
}
void GDExtension::_register_extension_class_internal(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_parent_class_name, const GDExtensionClassCreationInfo4 *p_extension_funcs, const ClassCreationDeprecatedInfo *p_deprecated_funcs) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
StringName parent_class_name = *reinterpret_cast<const StringName *>(p_parent_class_name);
ERR_FAIL_COND_MSG(!String(class_name).is_valid_unicode_identifier(), vformat("Attempt to register extension class '%s', which is not a valid class identifier.", class_name));
ERR_FAIL_COND_MSG(ClassDB::class_exists(class_name), vformat("Attempt to register extension class '%s', which appears to be already registered.", class_name));
Extension *parent_extension = nullptr;
if (self->extension_classes.has(parent_class_name)) {
parent_extension = &self->extension_classes[parent_class_name];
} else if (ClassDB::class_exists(parent_class_name)) {
if (ClassDB::get_api_type(parent_class_name) == ClassDB::API_EXTENSION || ClassDB::get_api_type(parent_class_name) == ClassDB::API_EDITOR_EXTENSION) {
ERR_PRINT("Unimplemented yet");
//inheriting from another extension
} else {
//inheriting from engine class
}
} else {
ERR_FAIL_MSG(vformat("Attempt to register an extension class '%s' using non-existing parent class '%s'.", String(class_name), String(parent_class_name)));
}
#ifdef TOOLS_ENABLED
Extension *extension = nullptr;
bool is_runtime = (bool)p_extension_funcs->is_runtime;
if (self->is_reloading && self->extension_classes.has(class_name)) {
extension = &self->extension_classes[class_name];
if (!parent_extension && parent_class_name != extension->gdextension.parent_class_name) {
ERR_FAIL_MSG(vformat("GDExtension class '%s' cannot change parent type from '%s' to '%s' on hot reload. Restart Godot for this change to take effect.", class_name, extension->gdextension.parent_class_name, parent_class_name));
}
if (extension->gdextension.is_runtime != is_runtime) {
ERR_PRINT(vformat("GDExtension class '%s' cannot change to/from runtime class on hot reload. Restart Godot for this change to take effect.", class_name));
is_runtime = extension->gdextension.is_runtime;
}
extension->is_reloading = false;
} else {
self->extension_classes[class_name] = Extension();
extension = &self->extension_classes[class_name];
}
#else
self->extension_classes[class_name] = Extension();
Extension *extension = &self->extension_classes[class_name];
#endif
if (parent_extension) {
extension->gdextension.parent = &parent_extension->gdextension;
parent_extension->gdextension.children.push_back(&extension->gdextension);
}
if (self->reloadable && p_extension_funcs->recreate_instance_func == nullptr) {
ERR_PRINT(vformat("Extension marked as reloadable, but attempted to register class '%s' which doesn't support reloading. Perhaps your language binding don't support it? Reloading disabled for this extension.", class_name));
self->reloadable = false;
}
extension->gdextension.library = self;
extension->gdextension.parent_class_name = parent_class_name;
extension->gdextension.class_name = class_name;
extension->gdextension.editor_class = self->level_initialized == INITIALIZATION_LEVEL_EDITOR;
extension->gdextension.is_virtual = p_extension_funcs->is_virtual;
extension->gdextension.is_abstract = p_extension_funcs->is_abstract;
extension->gdextension.is_exposed = p_extension_funcs->is_exposed;
#ifdef TOOLS_ENABLED
extension->gdextension.is_runtime = is_runtime;
#endif
extension->gdextension.set = p_extension_funcs->set_func;
extension->gdextension.get = p_extension_funcs->get_func;
extension->gdextension.get_property_list = p_extension_funcs->get_property_list_func;
extension->gdextension.free_property_list2 = p_extension_funcs->free_property_list_func;
extension->gdextension.property_can_revert = p_extension_funcs->property_can_revert_func;
extension->gdextension.property_get_revert = p_extension_funcs->property_get_revert_func;
extension->gdextension.validate_property = p_extension_funcs->validate_property_func;
#ifndef DISABLE_DEPRECATED
if (p_deprecated_funcs) {
extension->gdextension.notification = p_deprecated_funcs->notification_func;
extension->gdextension.free_property_list = p_deprecated_funcs->free_property_list_func;
extension->gdextension.create_instance = p_deprecated_funcs->create_instance_func;
extension->gdextension.get_rid = p_deprecated_funcs->get_rid_func;
extension->gdextension.get_virtual = p_deprecated_funcs->get_virtual_func;
extension->gdextension.get_virtual_call_data = p_deprecated_funcs->get_virtual_call_data_func;
}
#endif // DISABLE_DEPRECATED
extension->gdextension.notification2 = p_extension_funcs->notification_func;
extension->gdextension.to_string = p_extension_funcs->to_string_func;
extension->gdextension.reference = p_extension_funcs->reference_func;
extension->gdextension.unreference = p_extension_funcs->unreference_func;
extension->gdextension.class_userdata = p_extension_funcs->class_userdata;
extension->gdextension.create_instance2 = p_extension_funcs->create_instance_func;
extension->gdextension.free_instance = p_extension_funcs->free_instance_func;
extension->gdextension.recreate_instance = p_extension_funcs->recreate_instance_func;
extension->gdextension.get_virtual2 = p_extension_funcs->get_virtual_func;
extension->gdextension.get_virtual_call_data2 = p_extension_funcs->get_virtual_call_data_func;
extension->gdextension.call_virtual_with_data = p_extension_funcs->call_virtual_with_data_func;
extension->gdextension.reloadable = self->reloadable;
#ifdef TOOLS_ENABLED
if (extension->gdextension.reloadable) {
extension->gdextension.tracking_userdata = extension;
extension->gdextension.track_instance = &GDExtension::_track_instance;
extension->gdextension.untrack_instance = &GDExtension::_untrack_instance;
} else {
extension->gdextension.tracking_userdata = nullptr;
extension->gdextension.track_instance = nullptr;
extension->gdextension.untrack_instance = nullptr;
}
#endif
ClassDB::register_extension_class(&extension->gdextension);
if (p_extension_funcs->icon_path != nullptr) {
const String icon_path = *reinterpret_cast<const String *>(p_extension_funcs->icon_path);
if (!icon_path.is_empty()) {
self->class_icon_paths[class_name] = icon_path;
}
}
}
void GDExtension::_register_extension_class_method(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, const GDExtensionClassMethodInfo *p_method_info) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
StringName method_name = *reinterpret_cast<const StringName *>(p_method_info->name);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension method '%s' for unexisting class '%s'.", String(method_name), class_name));
#ifdef TOOLS_ENABLED
Extension *extension = &self->extension_classes[class_name];
GDExtensionMethodBind *method = nullptr;
// If the extension is still marked as reloading, that means it failed to register again.
if (extension->is_reloading) {
return;
}
if (self->is_reloading && extension->methods.has(method_name)) {
method = extension->methods[method_name];
// Try to update the method bind. If it doesn't work (because it's incompatible) then
// mark as invalid and create a new one.
if (!method->is_reloading || !method->try_update(p_method_info)) {
method->valid = false;
self->invalid_methods.push_back(method);
method = nullptr;
}
}
if (method == nullptr) {
method = memnew(GDExtensionMethodBind(p_method_info));
method->set_instance_class(class_name);
extension->methods[method_name] = method;
} else {
method->is_reloading = false;
}
#else
GDExtensionMethodBind *method = memnew(GDExtensionMethodBind(p_method_info));
method->set_instance_class(class_name);
#endif
ClassDB::bind_method_custom(class_name, method);
}
void GDExtension::_register_extension_class_virtual_method(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, const GDExtensionClassVirtualMethodInfo *p_method_info) {
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
ClassDB::add_extension_class_virtual_method(class_name, p_method_info);
}
void GDExtension::_register_extension_class_integer_constant(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_enum_name, GDExtensionConstStringNamePtr p_constant_name, GDExtensionInt p_constant_value, GDExtensionBool p_is_bitfield) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
StringName enum_name = *reinterpret_cast<const StringName *>(p_enum_name);
StringName constant_name = *reinterpret_cast<const StringName *>(p_constant_name);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension constant '%s' for unexisting class '%s'.", constant_name, class_name));
#ifdef TOOLS_ENABLED
// If the extension is still marked as reloading, that means it failed to register again.
Extension *extension = &self->extension_classes[class_name];
if (extension->is_reloading) {
return;
}
#endif
ClassDB::bind_integer_constant(class_name, enum_name, constant_name, p_constant_value, p_is_bitfield);
}
void GDExtension::_register_extension_class_property(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, const GDExtensionPropertyInfo *p_info, GDExtensionConstStringNamePtr p_setter, GDExtensionConstStringNamePtr p_getter) {
_register_extension_class_property_indexed(p_library, p_class_name, p_info, p_setter, p_getter, -1);
}
void GDExtension::_register_extension_class_property_indexed(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, const GDExtensionPropertyInfo *p_info, GDExtensionConstStringNamePtr p_setter, GDExtensionConstStringNamePtr p_getter, GDExtensionInt p_index) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
StringName setter = *reinterpret_cast<const StringName *>(p_setter);
StringName getter = *reinterpret_cast<const StringName *>(p_getter);
String property_name = *reinterpret_cast<const StringName *>(p_info->name);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension class property '%s' for unexisting class '%s'.", property_name, class_name));
#ifdef TOOLS_ENABLED
// If the extension is still marked as reloading, that means it failed to register again.
Extension *extension = &self->extension_classes[class_name];
if (extension->is_reloading) {
return;
}
#endif
PropertyInfo pinfo(*p_info);
ClassDB::add_property(class_name, pinfo, setter, getter, p_index);
}
void GDExtension::_register_extension_class_property_group(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringPtr p_group_name, GDExtensionConstStringPtr p_prefix) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
String group_name = *reinterpret_cast<const String *>(p_group_name);
String prefix = *reinterpret_cast<const String *>(p_prefix);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension class property group '%s' for unexisting class '%s'.", group_name, class_name));
#ifdef TOOLS_ENABLED
// If the extension is still marked as reloading, that means it failed to register again.
Extension *extension = &self->extension_classes[class_name];
if (extension->is_reloading) {
return;
}
#endif
ClassDB::add_property_group(class_name, group_name, prefix);
}
void GDExtension::_register_extension_class_property_subgroup(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringPtr p_subgroup_name, GDExtensionConstStringPtr p_prefix) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
String subgroup_name = *reinterpret_cast<const String *>(p_subgroup_name);
String prefix = *reinterpret_cast<const String *>(p_prefix);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension class property subgroup '%s' for unexisting class '%s'.", subgroup_name, class_name));
#ifdef TOOLS_ENABLED
// If the extension is still marked as reloading, that means it failed to register again.
Extension *extension = &self->extension_classes[class_name];
if (extension->is_reloading) {
return;
}
#endif
ClassDB::add_property_subgroup(class_name, subgroup_name, prefix);
}
void GDExtension::_register_extension_class_signal(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name, GDExtensionConstStringNamePtr p_signal_name, const GDExtensionPropertyInfo *p_argument_info, GDExtensionInt p_argument_count) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
StringName signal_name = *reinterpret_cast<const StringName *>(p_signal_name);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to register extension class signal '%s' for unexisting class '%s'.", signal_name, class_name));
#ifdef TOOLS_ENABLED
// If the extension is still marked as reloading, that means it failed to register again.
Extension *extension = &self->extension_classes[class_name];
if (extension->is_reloading) {
return;
}
#endif
MethodInfo s;
s.name = signal_name;
for (int i = 0; i < p_argument_count; i++) {
PropertyInfo arg(p_argument_info[i]);
s.arguments.push_back(arg);
}
ClassDB::add_signal(class_name, s);
}
void GDExtension::_unregister_extension_class(GDExtensionClassLibraryPtr p_library, GDExtensionConstStringNamePtr p_class_name) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
StringName class_name = *reinterpret_cast<const StringName *>(p_class_name);
ERR_FAIL_COND_MSG(!self->extension_classes.has(class_name), vformat("Attempt to unregister unexisting extension class '%s'.", class_name));
Extension *ext = &self->extension_classes[class_name];
#ifdef TOOLS_ENABLED
if (ext->is_reloading) {
self->_clear_extension(ext);
}
#endif
ERR_FAIL_COND_MSG(ext->gdextension.children.size(), vformat("Attempt to unregister class '%s' while other extension classes inherit from it.", class_name));
#ifdef TOOLS_ENABLED
ClassDB::unregister_extension_class(class_name, !ext->is_reloading);
#else
ClassDB::unregister_extension_class(class_name);
#endif
if (ext->gdextension.parent != nullptr) {
ext->gdextension.parent->children.erase(&ext->gdextension);
}
#ifdef TOOLS_ENABLED
if (!ext->is_reloading) {
self->extension_classes.erase(class_name);
}
GDExtensionEditorHelp::remove_class(class_name);
#else
self->extension_classes.erase(class_name);
#endif
}
void GDExtension::_get_library_path(GDExtensionClassLibraryPtr p_library, GDExtensionUninitializedStringPtr r_path) {
GDExtension *self = reinterpret_cast<GDExtension *>(p_library);
Ref<GDExtensionLibraryLoader> library_loader = self->loader;
String library_path;
if (library_loader.is_valid()) {
library_path = library_loader->library_path;
}
memnew_placement(r_path, String(library_path));
}
HashMap<StringName, GDExtensionInterfaceFunctionPtr> GDExtension::gdextension_interface_functions;
void GDExtension::register_interface_function(const StringName &p_function_name, GDExtensionInterfaceFunctionPtr p_function_pointer) {
ERR_FAIL_COND_MSG(gdextension_interface_functions.has(p_function_name), vformat("Attempt to register interface function '%s', which appears to be already registered.", p_function_name));
gdextension_interface_functions.insert(p_function_name, p_function_pointer);
}
GDExtensionInterfaceFunctionPtr GDExtension::get_interface_function(const StringName &p_function_name) {
GDExtensionInterfaceFunctionPtr *function = gdextension_interface_functions.getptr(p_function_name);
ERR_FAIL_NULL_V_MSG(function, nullptr, vformat("Attempt to get non-existent interface function: '%s'.", String(p_function_name)));
return *function;
}
Error GDExtension::open_library(const String &p_path, const Ref<GDExtensionLoader> &p_loader) {
ERR_FAIL_COND_V_MSG(p_loader.is_null(), FAILED, "Can't open GDExtension without a loader.");
loader = p_loader;
Error err = loader->open_library(p_path);
ERR_FAIL_COND_V_MSG(err == ERR_FILE_NOT_FOUND, err, vformat("GDExtension dynamic library not found: '%s'.", p_path));
ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Can't open GDExtension dynamic library: '%s'.", p_path));
err = loader->initialize(&gdextension_get_proc_address, this, &initialization);
if (err != OK) {
// Errors already logged in initialize().
loader->close_library();
return err;
}
level_initialized = -1;
return OK;
}
void GDExtension::close_library() {
ERR_FAIL_COND(!is_library_open());
loader->close_library();
class_icon_paths.clear();
#ifdef TOOLS_ENABLED
instance_bindings.clear();
#endif
}
bool GDExtension::is_library_open() const {
return loader.is_valid() && loader->is_library_open();
}
GDExtension::InitializationLevel GDExtension::get_minimum_library_initialization_level() const {
ERR_FAIL_COND_V(!is_library_open(), INITIALIZATION_LEVEL_CORE);
return InitializationLevel(initialization.minimum_initialization_level);
}
void GDExtension::initialize_library(InitializationLevel p_level) {
ERR_FAIL_COND(!is_library_open());
ERR_FAIL_COND_MSG(p_level <= int32_t(level_initialized), vformat("Level '%d' must be higher than the current level '%d'", p_level, level_initialized));
level_initialized = int32_t(p_level);
ERR_FAIL_NULL(initialization.initialize);
initialization.initialize(initialization.userdata, GDExtensionInitializationLevel(p_level));
}
void GDExtension::deinitialize_library(InitializationLevel p_level) {
ERR_FAIL_COND(!is_library_open());
ERR_FAIL_COND(p_level > int32_t(level_initialized));
level_initialized = int32_t(p_level) - 1;
ERR_FAIL_NULL(initialization.deinitialize);
initialization.deinitialize(initialization.userdata, GDExtensionInitializationLevel(p_level));
}
void GDExtension::_bind_methods() {
ClassDB::bind_method(D_METHOD("is_library_open"), &GDExtension::is_library_open);
ClassDB::bind_method(D_METHOD("get_minimum_library_initialization_level"), &GDExtension::get_minimum_library_initialization_level);
BIND_ENUM_CONSTANT(INITIALIZATION_LEVEL_CORE);
BIND_ENUM_CONSTANT(INITIALIZATION_LEVEL_SERVERS);
BIND_ENUM_CONSTANT(INITIALIZATION_LEVEL_SCENE);
BIND_ENUM_CONSTANT(INITIALIZATION_LEVEL_EDITOR);
}
GDExtension::GDExtension() {
}
GDExtension::~GDExtension() {
if (is_library_open()) {
close_library();
}
#ifdef TOOLS_ENABLED
// If we have any invalid method binds still laying around, we can finally free them!
for (GDExtensionMethodBind *E : invalid_methods) {
memdelete(E);
}
#endif
}
void GDExtension::initialize_gdextensions() {
gdextension_setup_interface();
#ifndef DISABLE_DEPRECATED
register_interface_function("classdb_register_extension_class", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class);
register_interface_function("classdb_register_extension_class2", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class2);
register_interface_function("classdb_register_extension_class3", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class3);
#endif // DISABLE_DEPRECATED
register_interface_function("classdb_register_extension_class4", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class4);
register_interface_function("classdb_register_extension_class_method", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_method);
register_interface_function("classdb_register_extension_class_virtual_method", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_virtual_method);
register_interface_function("classdb_register_extension_class_integer_constant", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_integer_constant);
register_interface_function("classdb_register_extension_class_property", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_property);
register_interface_function("classdb_register_extension_class_property_indexed", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_property_indexed);
register_interface_function("classdb_register_extension_class_property_group", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_property_group);
register_interface_function("classdb_register_extension_class_property_subgroup", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_property_subgroup);
register_interface_function("classdb_register_extension_class_signal", (GDExtensionInterfaceFunctionPtr)&GDExtension::_register_extension_class_signal);
register_interface_function("classdb_unregister_extension_class", (GDExtensionInterfaceFunctionPtr)&GDExtension::_unregister_extension_class);
register_interface_function("get_library_path", (GDExtensionInterfaceFunctionPtr)&GDExtension::_get_library_path);
}
void GDExtension::finalize_gdextensions() {
gdextension_interface_functions.clear();
}
Error GDExtensionResourceLoader::load_gdextension_resource(const String &p_path, Ref<GDExtension> &p_extension) {
ERR_FAIL_COND_V_MSG(p_extension.is_valid() && p_extension->is_library_open(), ERR_ALREADY_IN_USE, "Cannot load GDExtension resource into already opened library.");
GDExtensionManager *extension_manager = GDExtensionManager::get_singleton();
GDExtensionManager::LoadStatus status = extension_manager->load_extension(p_path);
if (status != GDExtensionManager::LOAD_STATUS_OK && status != GDExtensionManager::LOAD_STATUS_ALREADY_LOADED) {
// Errors already logged in load_extension().
return FAILED;
}
p_extension = extension_manager->get_extension(p_path);
return OK;
}
Ref<Resource> GDExtensionResourceLoader::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
// We can't have two GDExtension resource object representing the same library, because
// loading (or unloading) a GDExtension affects global data. So, we need reuse the same
// object if one has already been loaded (even if caching is disabled at the resource
// loader level).
GDExtensionManager *manager = GDExtensionManager::get_singleton();
if (manager->is_extension_loaded(p_path)) {
return manager->get_extension(p_path);
}
Ref<GDExtension> lib;
Error err = load_gdextension_resource(p_path, lib);
if (err != OK && r_error) {
// Errors already logged in load_gdextension_resource().
*r_error = err;
}
return lib;
}
void GDExtensionResourceLoader::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("gdextension");
}
bool GDExtensionResourceLoader::handles_type(const String &p_type) const {
return p_type == "GDExtension";
}
String GDExtensionResourceLoader::get_resource_type(const String &p_path) const {
String el = p_path.get_extension().to_lower();
if (el == "gdextension") {
return "GDExtension";
}
return "";
}
#ifdef TOOLS_ENABLED
bool GDExtension::has_library_changed() const {
return loader->has_library_changed();
}
void GDExtension::prepare_reload() {
is_reloading = true;
for (KeyValue<StringName, Extension> &E : extension_classes) {
E.value.is_reloading = true;
for (KeyValue<StringName, GDExtensionMethodBind *> &M : E.value.methods) {
M.value->is_reloading = true;
}
for (const ObjectID &obj_id : E.value.instances) {
Object *obj = ObjectDB::get_instance(obj_id);
if (!obj) {
continue;
}
// Store instance state so it can be restored after reload.
List<Pair<String, Variant>> state;
List<PropertyInfo> prop_list;
obj->get_property_list(&prop_list);
for (const PropertyInfo &P : prop_list) {
if (!(P.usage & PROPERTY_USAGE_STORAGE)) {
continue;
}
Variant value = obj->get(P.name);
Variant default_value = ClassDB::class_get_default_property_value(obj->get_class_name(), P.name);
if (default_value.get_type() != Variant::NIL && bool(Variant::evaluate(Variant::OP_EQUAL, value, default_value))) {
continue;
}
if (P.type == Variant::OBJECT && value.is_zero() && !(P.usage & PROPERTY_USAGE_STORE_IF_NULL)) {
continue;
}
state.push_back(Pair<String, Variant>(P.name, value));
}
E.value.instance_state[obj_id] = {
state, // List<Pair<String, Variant>> properties;
obj->is_extension_placeholder(), // bool is_placeholder;
};
}
}
}
void GDExtension::_clear_extension(Extension *p_extension) {
// Clear out hierarchy information because it may change.
p_extension->gdextension.parent = nullptr;
p_extension->gdextension.children.clear();
// Clear all objects of any GDExtension data. It will become its native parent class
// until the reload can reset the object with the new GDExtension data.
for (const ObjectID &obj_id : p_extension->instances) {
Object *obj = ObjectDB::get_instance(obj_id);
if (!obj) {
continue;
}
obj->clear_internal_extension();
}
}
void GDExtension::track_instance_binding(Object *p_object) {
instance_bindings.push_back(p_object->get_instance_id());
}
void GDExtension::untrack_instance_binding(Object *p_object) {
instance_bindings.erase(p_object->get_instance_id());
}
void GDExtension::clear_instance_bindings() {
for (ObjectID obj_id : instance_bindings) {
Object *obj = ObjectDB::get_instance(obj_id);
if (!obj) {
continue;
}
obj->free_instance_binding(this);
}
instance_bindings.clear();
}
void GDExtension::finish_reload() {
is_reloading = false;
// Clean up any classes or methods that didn't get re-added.
Vector<StringName> classes_to_remove;
for (KeyValue<StringName, Extension> &E : extension_classes) {
if (E.value.is_reloading) {
E.value.is_reloading = false;
classes_to_remove.push_back(E.key);
}
Vector<StringName> methods_to_remove;
for (KeyValue<StringName, GDExtensionMethodBind *> &M : E.value.methods) {
if (M.value->is_reloading) {
M.value->valid = false;
invalid_methods.push_back(M.value);
M.value->is_reloading = false;
methods_to_remove.push_back(M.key);
}
}
for (const StringName &method_name : methods_to_remove) {
E.value.methods.erase(method_name);
}
}
for (const StringName &class_name : classes_to_remove) {
extension_classes.erase(class_name);
}
// Reset any the extension on instances made from the classes that remain.
for (KeyValue<StringName, Extension> &E : extension_classes) {
// Loop over 'instance_state' rather than 'instance' because new instances
// may have been created when re-initializing the extension.
for (const KeyValue<ObjectID, Extension::InstanceState> &S : E.value.instance_state) {
Object *obj = ObjectDB::get_instance(S.key);
if (!obj) {
continue;
}
if (S.value.is_placeholder) {
obj->reset_internal_extension(ClassDB::get_placeholder_extension(E.value.gdextension.class_name));
} else {
obj->reset_internal_extension(&E.value.gdextension);
}
}
}
// Now that all the classes are back, restore the state.
for (KeyValue<StringName, Extension> &E : extension_classes) {
for (const KeyValue<ObjectID, Extension::InstanceState> &S : E.value.instance_state) {
Object *obj = ObjectDB::get_instance(S.key);
if (!obj) {
continue;
}