Function callback

example/multi.c:11–25

A function to be called from Wasm code.

// A function to be called from Wasm code.
own wasm_trap_t* callback(
  const wasm_val_vec_t* args, wasm_val_vec_t* results
) {
  printf("Calling back...\n> ");
  printf("> %"PRIu32" %"PRIu64" %"PRIu64" %"PRIu32"\n",
    args->data[0].of.i32, args->data[1].of.i64,
    args->data[2].of.i64, args->data[3].of.i32);
  printf("\n");

  wasm_val_copy(&results->data[0], &args->data[3]);
  wasm_val_copy(&results->data[1], &args->data[1]);
  wasm_val_copy(&results->data[2], &args->data[2]);
  wasm_val_copy(&results->data[3], &args->data[0]);
  return NULL;
}


// A function closure.