Function handlers

error/error.c:12–22

__thread struct hc_error *hc_error = NULL;

static struct hc_vector *handlers() {
  static bool init = true;
  static __thread struct hc_vector handlers;

  if (init) {
    hc_vector_init(&handlers, &hc_malloc_default, sizeof(jmp_buf));
    init = false;
  }
  
  return &handlers;
}

void hc_catch_push(jmp_buf h) {
  memcpy((jmp_buf *)hc_vector_push(handlers()), h, sizeof(jmp_buf));