#include <stdio.h>
#include <string.h>
#include <ffi.h>

static void
closure (ffi_cif* cif, void* resp, void** args, void* userdata)
{
  printf ("arg: %s\n", (char *) args[0]);

  * (char *) resp = * strdup("test dos");
}

typedef char * (*callback_type) (char *);

int
main (void)
{
  ffi_cif cif;
  ffi_closure cl;
  ffi_type *args[1];
  char *res, *tmp;

  args[0] = &ffi_type_pointer;

  if (FFI_OK != ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1, &ffi_type_pointer, args)) {
    printf ("couldn't prepare cif\n");
    return 1;
  }

  if (FFI_OK != ffi_prep_closure(&cl, &cif, closure, NULL)) {
    printf ("couldn't prepare closure\n");
    return 1;
  }

  res = ((callback_type) &cl) ("test uno");
  printf("res: %s\n", res);

  return 0;
}