lune/tests/ffi/external_closure/lib.c

#include<stdio.h>

typedef int (*lua_closure_t)(int, int);
int call_closure(lua_closure_t lua_closure) {
    return lua_closure(12, 24) * 2;
}

typedef void (*lua_hello_world_t)();
void call_hello_world(lua_hello_world_t lua_closure) {
    lua_closure();
}

typedef int (*lua_closure_with_pointer_t)(int, int*);
int call_closure_with_pointer(lua_closure_with_pointer_t lua_closure) {
    int b = 24;
    return lua_closure(12, &b) * 2;
}