* a lock_set_t is created and destroyed through the task object.
* lock_set_create(task,&lock_set_t,...);
* lock_set_destroy(task,lock_set_t);
*/
* a lock_set_t is created and destroyed through the task object.
* lock_set_create(task,&lock_set_t,...);
* lock_set_destroy(task,lock_set_t);
*/