38ee8bfcf7
This makes sure custom constructors are always called on extension classes. However, note that constructors should not take any parameters, since Godot doesn't support that. Parameters are ignore in memnew macro. Use memnew(MyClass()) instead of memnew(MyClass) since it now needs a value instead of a class name. This macro calls MyClass::_new() (define in GDCLASS macro) which ultimately calls Godot to create the object, ensuring that both the Godot and the extension instances are created. Non Godot classes (that don't derive godot::Object) are constructed as usual an can have parameters. memdelete is also changed for the same reason, as it needs to destroy the Godot object as well, and that automatically frees the bound extension instance.
540 lines
19 KiB
C++
540 lines
19 KiB
C++
/*************************************************************************/
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/* method_bind.hpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef GODOT_CPP_METHOD_BIND_HPP
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#define GODOT_CPP_METHOD_BIND_HPP
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#include <godot_cpp/core/binder_common.hpp>
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#include <godot_cpp/core/type_info.hpp>
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#include <godot_cpp/core/memory.hpp>
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#include <godot/gdnative_interface.h>
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#include <godot_cpp/classes/global_constants.hpp>
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#include <string>
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#include <vector>
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#include <iostream>
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namespace godot {
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class MethodBind {
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const char *name = nullptr;
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const char *instance_class = nullptr;
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int argument_count = 0;
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uint32_t hint_flags = METHOD_FLAGS_DEFAULT;
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bool _is_const = false;
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bool _has_return = false;
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std::vector<std::string> argument_names;
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GDNativeVariantType *argument_types = nullptr;
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std::vector<Variant> default_arguments;
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protected:
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virtual GDNativeVariantType gen_argument_type(int p_arg) const = 0;
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const = 0;
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void generate_argument_types(int p_count);
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void set_const(bool p_const);
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void set_return(bool p_return);
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void set_argument_count(int p_count);
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public:
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const char *get_name() const;
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void set_name(const char *p_name);
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_FORCE_INLINE_ int get_default_argument_count() const { return default_arguments.size(); }
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_FORCE_INLINE_ const std::vector<Variant> &get_default_arguments() const { return default_arguments; }
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_FORCE_INLINE_ Variant has_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return false;
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} else {
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return true;
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}
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}
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_FORCE_INLINE_ Variant get_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return Variant();
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} else {
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return default_arguments[idx];
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}
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}
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_FORCE_INLINE_ const char *get_instance_class() const { return instance_class; }
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_FORCE_INLINE_ void set_instance_class(const char *p_class) { instance_class = p_class; }
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_FORCE_INLINE_ int get_argument_count() const { return argument_count; };
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_FORCE_INLINE_ bool is_const() const { return _is_const; }
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_FORCE_INLINE_ bool has_return() const { return _has_return; }
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_FORCE_INLINE_ uint32_t get_hint_flags() const { return hint_flags; }
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_FORCE_INLINE_ void set_hint_flags(uint32_t p_hint_flags) { hint_flags = p_hint_flags; }
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void set_argument_names(const std::vector<std::string> &p_names);
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std::vector<std::string> get_argument_names() const;
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void set_default_arguments(const std::vector<Variant> &p_default_arguments) { default_arguments = p_default_arguments; }
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_FORCE_INLINE_ GDNativeVariantType get_argument_type(int p_argument) const {
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ERR_FAIL_COND_V(p_argument < -1 || p_argument > argument_count, GDNATIVE_VARIANT_TYPE_NIL);
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return argument_types[p_argument + 1];
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}
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GDNativePropertyInfo get_argument_info(int p_argument) const;
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const = 0;
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const = 0;
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return) const = 0;
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// Extension info.
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static GDNativeVariantType bind_get_argument_type(void *p_method_userdata, int32_t p_argument);
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static void bind_get_argument_info(void *p_method_userdata, int32_t p_argument, GDNativePropertyInfo *r_info);
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static GDNativeExtensionClassMethodArgumentMetadata bind_get_argument_metadata(void *p_method_userdata, int32_t p_argument);
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static void bind_call(void *p_method_userdata, GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeVariantPtr r_return, GDNativeCallError *r_error);
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static void bind_ptrcall(void *p_method_userdata, GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return);
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virtual ~MethodBind();
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};
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template <class T>
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class MethodBindVarArg : public MethodBind {
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public:
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typedef Variant (T::*NativeCall)(const Variant **, GDNativeInt, GDNativeCallError &);
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protected:
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NativeCall call_method = nullptr;
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MethodInfo arguments;
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public:
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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if (p_arg < 0) {
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return arguments.return_val;
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} else if (p_arg < arguments.arguments.size()) {
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return arguments.arguments[p_arg];
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} else {
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return PropertyInfo(Variant::NIL, "vararg", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
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}
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}
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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return static_cast<GDNativeVariantType>(gen_argument_type_info(p_arg).type);
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}
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int) const {
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return GDNATIVE_EXTENSION_METHOD_ARGUMENT_METADATA_NONE;
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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T *instance = static_cast<T *>(p_instance);
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return (instance->*call_method)((const Variant **)p_args, p_argument_count, r_error);
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}
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void set_method_info(const MethodInfo &p_info, bool p_return_nil_is_variant) {
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set_argument_count(p_info.arguments.size());
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if (p_info.arguments.size()) {
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std::vector<std::string> names;
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names.reserve(p_info.arguments.size());
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for (int i = 0; i < p_info.arguments.size(); i++) {
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names.push_back(p_info.arguments[i].name);
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}
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set_argument_names(names);
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}
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arguments = p_info;
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if (p_return_nil_is_variant) {
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arguments.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
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}
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generate_argument_types(p_info.arguments.size());
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return) const {
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ERR_FAIL(); // Can't call.
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}
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void set_method(NativeCall p_method) { call_method = p_method; }
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virtual bool is_const() const { return false; }
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virtual bool is_vararg() const { return true; }
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MethodBindVarArg() {
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set_return(true);
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}
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};
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template <class T>
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MethodBind *create_vararg_method_bind(Variant (T::*p_method)(const Variant **, GDNativeInt, GDNativeCallError &), const MethodInfo &p_info, bool p_return_nil_is_variant) {
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MethodBindVarArg<T> *a = memnew(MethodBindVarArg<T>());
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a->set_method(p_method);
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a->set_method_info(p_info, p_return_nil_is_variant);
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a->set_instance_class(T::get_class_static());
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return a;
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}
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#ifndef TYPED_METHOD_BIND
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class ___UnexistingClass;
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#define MB_T ___UnexistingClass
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#else
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#define MB_T T
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#endif
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// No return, not const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindT : public MethodBind {
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void (MB_T::*method)(P...);
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GDNATIVE_VARIANT_TYPE_NIL;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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GDNativePropertyInfo pi;
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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call_get_argument_type_info<P...>(p_arg, pi);
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} else {
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pi = PropertyInfo();
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}
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return pi;
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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return call_get_argument_metadata<P...>(p_argument);
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#else
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call_with_variant_args_dv(reinterpret_cast<MB_T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, P...>(static_cast<T *>(p_instance), method, p_args, nullptr);
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#else
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call_with_ptr_args<MB_T, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, nullptr);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindT(void (MB_T::*p_method)(P...)) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
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#endif // DEBUG_METHODS_ENABLED
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...)) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindT<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindT<P...>)(reinterpret_cast<void (MB_T::*)(P...)>(p_method)));
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#endif // TYPED_METHOD_BIND
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// No return, const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindTC : public MethodBind {
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void (MB_T::*method)(P...) const;
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GDNATIVE_VARIANT_TYPE_NIL;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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GDNativePropertyInfo pi;
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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call_get_argument_type_info<P...>(p_arg, pi);
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} else {
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pi = PropertyInfo();
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}
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return pi;
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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return call_get_argument_metadata<P...>(p_argument);
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_argsc_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#else
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call_with_variant_argsc_dv(reinterpret_cast<MB_T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, P...>(static_cast<T *>(p_instance), method, p_args, nullptr);
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#else
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call_with_ptr_args<MB_T, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, nullptr);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindTC(void (MB_T::*p_method)(P...) const) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
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#endif // DEBUG_METHODS_ENABLED
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...) const) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindTC<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindTC<P...>)(reinterpret_cast<void (MB_T::*)(P...) const>(p_method)));
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#endif // TYPED_METHOD_BIND
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// Return, not const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class R, class... P>
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#else
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template <class R, class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindTR : public MethodBind {
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R(MB_T::*method)
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(P...);
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GetTypeInfo<R>::VARIANT_TYPE;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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GDNativePropertyInfo pi;
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call_get_argument_type_info<P...>(p_arg, pi);
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return pi;
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} else {
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return GetTypeInfo<R>::get_class_info();
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}
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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if (p_argument >= 0) {
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return call_get_argument_metadata<P...>(p_argument);
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} else {
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return GetTypeInfo<R>::METADATA;
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}
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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Variant ret;
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_ret_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, ret, r_error, get_default_arguments());
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#else
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call_with_variant_args_ret_dv((MB_T *)p_instance, method, p_args, p_argument_count, ret, r_error, get_default_arguments());
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#endif
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return ret;
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, R, P...>(static_cast<T *>(p_instance), method, p_args, r_ret);
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#else
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call_with_ptr_args<MB_T, R, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, r_ret);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindTR(R (MB_T::*p_method)(P...)) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
|
|
#endif // DEBUG_METHODS_ENABLED
|
|
set_argument_count(sizeof...(P));
|
|
set_return(true);
|
|
}
|
|
};
|
|
|
|
template <class T, class R, class... P>
|
|
MethodBind *create_method_bind(R (T::*p_method)(P...)) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
MethodBind *a = memnew((MethodBindTR<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTR<R, P...>)(reinterpret_cast<R (MB_T::*)(P...)>(p_method)));
|
|
#endif // TYPED_METHOD_BIND
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
// Return, const.
|
|
|
|
#ifdef TYPED_METHOD_BIND
|
|
template <class T, class R, class... P>
|
|
#else
|
|
template <class R, class... P>
|
|
#endif // TYPED_METHOD_BIND
|
|
class MethodBindTRC : public MethodBind {
|
|
R(MB_T::*method)
|
|
(P...) const;
|
|
|
|
protected:
|
|
// GCC raises warnings in the case P = {} as the comparison is always false...
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wlogical-op"
|
|
#endif
|
|
virtual GDNativeVariantType gen_argument_type(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
return call_get_argument_type<P...>(p_arg);
|
|
} else {
|
|
return GetTypeInfo<R>::VARIANT_TYPE;
|
|
}
|
|
}
|
|
|
|
virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
GDNativePropertyInfo pi;
|
|
call_get_argument_type_info<P...>(p_arg, pi);
|
|
return pi;
|
|
} else {
|
|
return GetTypeInfo<R>::get_class_info();
|
|
}
|
|
}
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
public:
|
|
virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
|
|
if (p_argument >= 0) {
|
|
return call_get_argument_metadata<P...>(p_argument);
|
|
} else {
|
|
return GetTypeInfo<R>::METADATA;
|
|
}
|
|
}
|
|
|
|
virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
|
|
Variant ret;
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_variant_args_retc_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, ret, r_error, get_default_arguments());
|
|
#else
|
|
call_with_variant_args_retc_dv((MB_T *)p_instance, method, p_args, p_argument_count, ret, r_error, get_default_arguments());
|
|
#endif
|
|
return ret;
|
|
}
|
|
virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_ptr_args<T, R, P...>(static_cast<T *>(p_instance), method, p_args, r_ret);
|
|
#else
|
|
call_with_ptr_args<MB_T, R, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, r_ret);
|
|
#endif // TYPED_METHOD_BIND
|
|
}
|
|
|
|
MethodBindTRC(R (MB_T::*p_method)(P...) const) {
|
|
method = p_method;
|
|
#ifdef DEBUG_METHODS_ENABLED
|
|
generate_argument_types(sizeof...(P));
|
|
#endif // DEBUG_METHODS_ENABLED
|
|
set_argument_count(sizeof...(P));
|
|
set_return(true);
|
|
}
|
|
};
|
|
|
|
template <class T, class R, class... P>
|
|
MethodBind *create_method_bind(R (T::*p_method)(P...) const) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
MethodBind *a = memnew((MethodBindTRC<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTRC<R, P...>)(reinterpret_cast<R (MB_T::*)(P...) const>(p_method)));
|
|
#endif // TYPED_METHOD_BIND
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
} // namespace godot
|
|
|
|
#endif // ! GODOT_CPP_METHOD_BIND_HPP
|