void
exit_sem_queue(sem_queue_t *sem_queue) {
assert(sem_queue != NULL && sem_queue_count(sem_queue) == 0);
list_entry_t *list = &(sem_queue->semu_list), *le = list;
while ((le = list_next(list)) != list) {
list_del(le);
semu_destroy(le2semu(le, semu_link));
}
}
static int semu_search_with_addr(list_entry_t * list, uintptr_t addr)
{
list_entry_t *le = list;
while ((le = list_next(le)) != list) {
sem_undo_t *semu = le2semu(le, semu_link);
if (semu->sem->addr == addr)
return sem2semid(semu->sem);
}
return -1;
}
int
dup_sem_queue(sem_queue_t *to, sem_queue_t *from) {
assert(to != NULL && from != NULL);
list_entry_t *list = &(from->semu_list), *le = list;
while ((le = list_next(le)) != list) {
sem_undo_t *semu;
if ((semu = semu_create(le2semu(le, semu_link)->sem, 0)) == NULL) {
return -E_NO_MEM;
}
list_add(&(to->semu_list), &(semu->semu_link));
}
return 0;
}
static sem_undo_t *
semu_list_search(list_entry_t *list, sem_t sem_id) {
if (VALID_SEMID(sem_id)) {
semaphore_t *sem = semid2sem(sem_id);
list_entry_t *le = list;
while ((le = list_next(le)) != list) {
sem_undo_t *semu = le2semu(le, semu_link);
if (semu->sem == sem) {
list_del(le);
list_add_after(list, le);
return semu;
}
}
}
return NULL;
}
