[C] Array of function pointers

What want to do

As stated in the title, I would like to define an array of function pointers.

Specifically, for example, the third argument of pthread_create is the pointer to the function you want to run in the new thread. When you want to allocate new threads for multiple functions, you can put those pointers into an array and process them together.

Solution

You can do it like this:

void *(*funcs[])(void *)

The meaning is as follows:

(*funcs): function pointers

(*funcs)(void *): A pointer to a function that takes a void pointer as an argument.

void *( *funcs): A pointer to a function that returns void *

Use it like this

void *(*services[])(void *) = {Service_1, Service_2, Service_3};

for (i = 0; i< NUM_THREADS; i++){
	pthread_create(&threads[0], sched_attr, services[i], (void *)threadParams);
}

void *Service_1(void *threadp){
 ...
}