Make extension instances create the corresponding godot object in their constructor
This commit is contained in:
Gilles Roudière
@@ -34,6 +34,7 @@
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#include <godot_cpp/core/memory.hpp>
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#include <godot_cpp/godot.hpp>
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namespace godot {
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typedef void GodotObject;
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@@ -41,46 +42,22 @@ typedef void GodotObject;
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// Base for all engine classes, to contain the pointer to the engine instance.
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class Wrapped {
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friend class GDExtensionBinding;
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// Private constructor, this should not be created directly by users.
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Wrapped(GodotObject *p_owner) :
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_owner(p_owner) {}
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friend void postinitialize_handler(Wrapped *);
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protected:
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Wrapped() = default;
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virtual const char *_get_class() const = 0; // This is needed to retrieve the class name before the godot object has its _extension and _extension_instance members assigned.
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virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const = 0;
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void _postinitialize();
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Wrapped(const char *p_godot_class);
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Wrapped(GodotObject *p_godot_object);
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public:
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// Must be public but you should not touch this.
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GodotObject *_owner = nullptr;
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static Wrapped *_new() {
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return nullptr;
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}
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};
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namespace internal {
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template <class T, class Enable = void>
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struct Creator {
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static T *_new() { return nullptr; }
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};
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template <class T>
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struct Creator<T, typename std::enable_if<std::is_base_of_v<godot::Wrapped, T>>::type> {
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static T *_new() { return T::_new(); }
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};
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// template <class T>
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// struct Creator<T, std::false_type> {
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// };
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// template <class T>
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// struct Creator<T, std::enable_if_t<std::is_base_of_v<godot::Wrapped, T>, bool>> {
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// static T *_new() { return T::_new(); }
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// };
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}; // namespace internal
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} // namespace godot
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#ifdef DEBUG_ENABLED
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@@ -94,126 +71,126 @@ struct Creator<T, typename std::enable_if<std::is_base_of_v<godot::Wrapped, T>>:
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#define CHECK_CLASS_CONSTRUCTOR(m_constructor, m_class)
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#endif
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#define GDCLASS(m_class, m_inherits) \
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private: \
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friend class ClassDB; \
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\
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using SelfType = m_class; \
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\
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protected: \
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static void (*_get_bind_methods())() { \
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return &m_class::_bind_methods; \
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} \
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\
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template <class T> \
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static void register_virtuals() { \
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m_inherits::register_virtuals<T>(); \
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} \
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\
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public: \
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static void initialize_class() { \
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static bool initialized = false; \
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if (initialized) { \
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return; \
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} \
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m_inherits::initialize_class(); \
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if (m_class::_get_bind_methods() != m_inherits::_get_bind_methods()) { \
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_bind_methods(); \
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m_inherits::register_virtuals<m_class>(); \
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} \
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initialized = true; \
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} \
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\
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static const char *get_class_static() { \
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return #m_class; \
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} \
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\
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static const char *get_parent_class_static() { \
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return #m_inherits; \
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} \
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\
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static GDExtensionClassInstancePtr create(void *data) { \
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return reinterpret_cast<GDExtensionClassInstancePtr>(new ("") m_class); \
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} \
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\
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static void free(void *data, GDExtensionClassInstancePtr ptr) { \
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if (ptr) { \
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m_class *cls = reinterpret_cast<m_class *>(ptr); \
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cls->~m_class(); \
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::godot::Memory::free_static(cls); \
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} \
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} \
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\
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static void set_object_instance(GDExtensionClassInstancePtr p_instance, GDNativeObjectPtr p_object_instance) { \
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godot::internal::gdn_interface->object_set_instance_binding(p_object_instance, godot::internal::token, p_instance, &m_class::___binding_callbacks); \
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reinterpret_cast<m_class *>(p_instance)->_owner = reinterpret_cast<godot::GodotObject *>(p_object_instance); \
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} \
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\
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static void *___binding_create_callback(void *p_token, void *p_instance) { \
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return nullptr; \
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} \
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static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
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} \
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static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
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return true; \
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} \
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static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \
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___binding_create_callback, \
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___binding_free_callback, \
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___binding_reference_callback, \
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}; \
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\
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static m_class *_new() { \
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static GDNativeExtensionPtr ___extension = nullptr; \
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static GDNativeClassConstructor ___constructor = godot::internal::gdn_interface->classdb_get_constructor(#m_class, &___extension); \
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CHECK_CLASS_CONSTRUCTOR(___constructor, m_class); \
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GDNativeObjectPtr obj = godot::internal::gdn_interface->classdb_construct_object(___constructor, ___extension); \
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return reinterpret_cast<m_class *>(godot::internal::gdn_interface->object_get_instance_binding(obj, godot::internal::token, &m_class::___binding_callbacks)); \
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} \
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\
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private:
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#define GDCLASS(m_class, m_inherits) \
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private: \
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void operator=(const m_class &p_rval) {} \
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friend class ClassDB; \
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\
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using SelfType = m_class; \
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\
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protected: \
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virtual const char *_get_class() const override { \
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return get_class_static(); \
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} \
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\
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virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const override { \
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return &___binding_callbacks; \
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} \
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\
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static void (*_get_bind_methods())() { \
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return &m_class::_bind_methods; \
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} \
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\
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template <class T> \
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static void register_virtuals() { \
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m_inherits::register_virtuals<T>(); \
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} \
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\
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public: \
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static void initialize_class() { \
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static bool initialized = false; \
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if (initialized) { \
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return; \
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} \
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m_inherits::initialize_class(); \
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if (m_class::_get_bind_methods() != m_inherits::_get_bind_methods()) { \
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_bind_methods(); \
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m_inherits::register_virtuals<m_class>(); \
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} \
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initialized = true; \
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} \
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\
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static const char *get_class_static() { \
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return #m_class; \
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} \
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\
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static const char *get_parent_class_static() { \
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return #m_inherits; \
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} \
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\
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static GDNativeObjectPtr create(void *data) { \
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m_class *new_object = memnew(m_class); \
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return new_object->_owner; \
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} \
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\
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static void free(void *data, GDExtensionClassInstancePtr ptr) { \
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if (ptr) { \
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m_class *cls = reinterpret_cast<m_class *>(ptr); \
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cls->~m_class(); \
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::godot::Memory::free_static(cls); \
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} \
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} \
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\
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static void *___binding_create_callback(void *p_token, void *p_instance) { \
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return nullptr; \
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} \
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static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
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} \
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static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
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return true; \
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} \
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static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \
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___binding_create_callback, \
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___binding_free_callback, \
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___binding_reference_callback, \
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};
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// Don't use this for your classes, use GDCLASS() instead.
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#define GDNATIVE_CLASS(m_class, m_inherits) \
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protected: \
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static void (*_get_bind_methods())() { \
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return nullptr; \
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} \
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\
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public: \
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static void initialize_class() {} \
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\
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static const char *get_class_static() { \
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return #m_class; \
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} \
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\
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static const char *get_parent_class_static() { \
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return #m_inherits; \
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} \
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\
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static void *___binding_create_callback(void *p_token, void *p_instance) { \
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m_class *obj = new ("") m_class; \
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obj->_owner = (godot::GodotObject *)p_instance; \
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return obj; \
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} \
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static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
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Memory::free_static(reinterpret_cast<m_class *>(p_binding)); \
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} \
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static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
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return true; \
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} \
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static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \
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___binding_create_callback, \
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___binding_free_callback, \
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___binding_reference_callback, \
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}; \
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static m_class *_new() { \
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static GDNativeClassConstructor ___constructor = godot::internal::gdn_interface->classdb_get_constructor(#m_class, nullptr); \
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CHECK_CLASS_CONSTRUCTOR(___constructor, m_class); \
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GDNativeObjectPtr obj = ___constructor(); \
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return reinterpret_cast<m_class *>(godot::internal::gdn_interface->object_get_instance_binding(obj, godot::internal::token, &m_class::___binding_callbacks)); \
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} \
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\
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private:
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#define GDNATIVE_CLASS(m_class, m_inherits) \
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private: \
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void operator=(const m_class &p_rval) {} \
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\
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protected: \
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virtual const char *_get_class() const override { \
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return get_class_static(); \
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} \
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\
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virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const override { \
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return &___binding_callbacks; \
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} \
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\
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m_class(const char *p_godot_class) : m_inherits(p_godot_class) {} \
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m_class(GodotObject *p_godot_object) : m_inherits(p_godot_object) {} \
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\
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static void (*_get_bind_methods())() { \
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return nullptr; \
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} \
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\
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public: \
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static void initialize_class() {} \
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\
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static const char *get_class_static() { \
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return #m_class; \
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} \
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\
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static const char *get_parent_class_static() { \
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return #m_inherits; \
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} \
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\
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static void *___binding_create_callback(void *p_token, void *p_instance) { \
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return memnew(m_class((GodotObject *)p_instance)); \
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} \
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static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \
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Memory::free_static(reinterpret_cast<m_class *>(p_binding)); \
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} \
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static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \
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return true; \
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} \
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static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \
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___binding_create_callback, \
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___binding_free_callback, \
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___binding_reference_callback, \
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}; \
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m_class() : m_class(#m_class) {}
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#endif // ! GODOT_CPP_WRAPPED_HPP
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