/*************************************************************************/
/*  managed_callable.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifndef MANAGED_CALLABLE_H
#define MANAGED_CALLABLE_H

#include <mono/metadata/object.h>

#include "core/os/mutex.h"
#include "core/templates/self_list.h"
#include "core/variant/callable.h"

#include "mono_gc_handle.h"
#include "mono_gd/gd_mono_method.h"

class ManagedCallable : public CallableCustom {
	friend class CSharpLanguage;
	MonoGCHandleData delegate_handle;
	GDMonoMethod *delegate_invoke = nullptr;

#ifdef GD_MONO_HOT_RELOAD
	SelfList<ManagedCallable> self_instance = this;
	static SelfList<ManagedCallable>::List instances;
	static Map<ManagedCallable *, Array> instances_pending_reload;
	static Mutex instances_mutex;
#endif

public:
	uint32_t hash() const override;
	String get_as_text() const override;
	CompareEqualFunc get_compare_equal_func() const override;
	CompareLessFunc get_compare_less_func() const override;
	ObjectID get_object() const override;
	void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const override;

	_FORCE_INLINE_ MonoDelegate *get_delegate() { return (MonoDelegate *)delegate_handle.get_target(); }

	void set_delegate(MonoDelegate *p_delegate);

	static bool compare_equal(const CallableCustom *p_a, const CallableCustom *p_b);
	static bool compare_less(const CallableCustom *p_a, const CallableCustom *p_b);

	static constexpr CompareEqualFunc compare_equal_func_ptr = &ManagedCallable::compare_equal;
	static constexpr CompareEqualFunc compare_less_func_ptr = &ManagedCallable::compare_less;

	ManagedCallable(MonoDelegate *p_delegate);
	~ManagedCallable();
};

#endif // MANAGED_CALLABLE_H