nokotan

// __externref_t is a opaque pointer that will be translated to wasm externref.

__attribute__((import_name("receive_object")))
__externref_t receive_object(void);

__attribute__((import_name("send_object")))
void send_object(__externref_t);

int main() {
    send_object(receive_object());

nokotan

#include <math.h>

struct position {
  double x;
  double y;
  double z;
};

int collisionDetection(struct position *positions,
                       double *radiuses,