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/*************************************************************************/
/* callable_method_pointer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef CALLABLE_METHOD_POINTER_H
#define CALLABLE_METHOD_POINTER_H
#include "core/object/object.h"
#include "core/os/copymem.h"
#include "core/templates/hashfuncs.h"
#include "core/templates/simple_type.h"
#include "core/variant/binder_common.h"
#include "core/variant/callable.h"
class CallableCustomMethodPointerBase : public CallableCustom {
uint32_t *comp_ptr;
uint32_t comp_size;
uint32_t h;
#ifdef DEBUG_METHODS_ENABLED
const char *text = "";
#endif
static bool compare_equal(const CallableCustom *p_a, const CallableCustom *p_b);
static bool compare_less(const CallableCustom *p_a, const CallableCustom *p_b);
protected:
void _setup(uint32_t *p_base_ptr, uint32_t p_ptr_size);
public:
#ifdef DEBUG_METHODS_ENABLED
void set_text(const char *p_text) {
text = p_text;
}
virtual String get_as_text() const {
return text;
}
#else
virtual String get_as_text() const {
return String();
}
#endif
virtual CompareEqualFunc get_compare_equal_func() const;
virtual CompareLessFunc get_compare_less_func() const;
virtual uint32_t hash() const;
};
template <class T, class... P>
class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
void (T::*method)(P...);
} data;
public:
virtual ObjectID get_object() const {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
ERR_FAIL_COND_MSG(ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr, "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args(data.instance, data.method, p_arguments, p_argcount, r_call_error);
}
CallableCustomMethodPointer(T *p_instance, void (T::*p_method)(P...)) {
zeromem(&data, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}
};
template <class T, class... P>
Callable create_custom_callable_function_pointer(T *p_instance,
#ifdef DEBUG_METHODS_ENABLED
const char *p_func_text,
#endif
void (T::*p_method)(P...)) {
typedef CallableCustomMethodPointer<T, P...> CCMP; // Messes with memnew otherwise.
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
#ifdef DEBUG_METHODS_ENABLED
ccmp->set_text(p_func_text + 1); // Try to get rid of the ampersand.
#endif
return Callable(ccmp);
}
// VERSION WITH RETURN
template <class T, class R, class... P>
class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
R(T::*method)
(P...);
} data;
public:
virtual ObjectID get_object() const {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
ERR_FAIL_COND_MSG(ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr, "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args_ret(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRet(T *p_instance, R (T::*p_method)(P...)) {
zeromem(&data, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}
};
template <class T, class R, class... P>
Callable create_custom_callable_function_pointer(T *p_instance,
#ifdef DEBUG_METHODS_ENABLED
const char *p_func_text,
#endif
R (T::*p_method)(P...)) {
typedef CallableCustomMethodPointerRet<T, R, P...> CCMP; // Messes with memnew otherwise.
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
#ifdef DEBUG_METHODS_ENABLED
ccmp->set_text(p_func_text + 1); // Try to get rid of the ampersand.
#endif
return Callable(ccmp);
}
// CONST VERSION WITH RETURN
template <class T, class R, class... P>
class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
R(T::*method)
(P...) const;
} data;
public:
virtual ObjectID get_object() const {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
ERR_FAIL_COND_MSG(ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr, "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args_retc(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRetC(T *p_instance, R (T::*p_method)(P...) const) {
zeromem(&data, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}
};
template <class T, class R, class... P>
Callable create_custom_callable_function_pointer(T *p_instance,
#ifdef DEBUG_METHODS_ENABLED
const char *p_func_text,
#endif
R (T::*p_method)(P...) const) {
typedef CallableCustomMethodPointerRetC<T, R, P...> CCMP; // Messes with memnew otherwise.
CCMP *ccmp = memnew(CCMP(p_instance, p_method));
#ifdef DEBUG_METHODS_ENABLED
ccmp->set_text(p_func_text + 1); // Try to get rid of the ampersand.
#endif
return Callable(ccmp);
}
#ifdef DEBUG_METHODS_ENABLED
#define callable_mp(I, M) create_custom_callable_function_pointer(I, #M, M)
#else
#define callable_mp(I, M) create_custom_callable_function_pointer(I, M)
#endif
#endif // CALLABLE_METHOD_POINTER_H
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