int64_t barriers;
};
-int barrier_init(Barrier *obj);
+#define BARRIER_NULL {-1, -1, {-1, -1}, 0}
+
+int barrier_create(Barrier *obj);
void barrier_destroy(Barrier *b);
+DEFINE_TRIVIAL_CLEANUP_FUNC(Barrier*, barrier_destroy);
+
void barrier_set_role(Barrier *b, unsigned int role);
bool barrier_place(Barrier *b);