Python Decorator in C

I implementating Webserver Framework in c with fastcgi And I reference to Flask structure.

I want to make my Framework programe easy and simple to use, So I thought what i should implement Decorator in Python. Therefore I use gcc constructor attribute and C mecro Function to imitate Decorateor.

Python decorator

def decorator(func):
	def wrapper():
		print("before")
		func()
		print("after")
	return wrapper


@decorator
def say_byte():
	print("bye")

Imitate Decorator in c

#define CONCAT(x,y) x##y
#define GEN_FUNC_NAME CONCAT(x,y)
#define FUNC_NAME_BASE FUNC_BASE // You Shoud Modify it!!

#define DECORATOR(__fn_name) \
	extern void func();\
	void __attribute__((constructor)) GEN_FUNC_NAME(FUNC_NAME_BASE, __COUNTER__) () {\
		printf("before");\
		__fn_name();\
		printf("after");\
	}\
	void __fn_name()

DECORATOR(func) {
	printf("bye");
}

if you imitate the decorator in this way, you can just declare it and execute it before the main function