uint64_t model_rmwr_action(void *obj, memory_order ord);
void model_rmw_action(void *obj, memory_order ord, uint64_t val);
void model_rmwc_action(void *obj, memory_order ord);
uint64_t model_rmwr_action(void *obj, memory_order ord);
void model_rmw_action(void *obj, memory_order ord, uint64_t val);
void model_rmwc_action(void *obj, memory_order ord);