libkse/sys/lock.c

46 _lock_destroy(struct lock *lck)
48 	if ((lck != NULL) && (lck->l_head != NULL)) {
49 		free(lck->l_head);
50 		lck->l_head = NULL;
51 		lck->l_tail = NULL;
56 _lock_init(struct lock *lck, enum lock_type ltype,
60 	if (lck == NULL)
62 	else if ((lck->l_head = calloc_cb(1, sizeof(struct lockreq))) == NULL)
65 		lck->l_type = ltype;
66 		lck->l_wait = waitfunc;
67 		lck->l_wakeup = wakeupfunc;
68 		lck->l_head->lr_locked = 0;
69 		lck->l_head->lr_watcher = NULL;
70 		lck->l_head->lr_owner = NULL;
71 		lck->l_head->lr_active = 1;
72 		lck->l_tail = lck->l_head;
78 _lock_reinit(struct lock *lck, enum lock_type ltype,
81 	if (lck == NULL)
83 	else if (lck->l_head == NULL)
84 		return (_lock_init(lck, ltype, waitfunc, wakeupfunc, calloc));
86 		lck->l_head->lr_locked = 0;
87 		lck->l_head->lr_watcher = NULL;
88 		lck->l_head->lr_owner = NULL;
89 		lck->l_head->lr_active = 1;
90 		lck->l_tail = lck->l_head;
162 _lock_acquire(struct lock *lck, struct lockuser *lu, int prio)
174 	if (lck == NULL || lu == NULL || lck->l_head == NULL)
177 	if ((lck->l_type & LCK_PRIORITY) != 0) {
189 	atomic_swap_ptr((void *)&lck->l_head, lu->lu_myreq,
196 		if ((lck->l_wait == NULL) ||
197 		    ((lck->l_type & LCK_ADAPTIVE) == 0)) {
231 				lck->l_wait(lck, lu);
242 _lock_release(struct lock *lck, struct lockuser *lu)
256 	if ((lck == NULL) || (lu == NULL))
259 	if ((lck->l_type & LCK_PRIORITY) != 0) {
266 			    (void *)&lck->l_tail,
295 		for (lu_tmp = lck->l_tail->lr_watcher; lu_tmp != NULL;
304 			if (lck->l_wakeup != NULL) {
310 					lck->l_wakeup(lck,
317 			if (lck->l_wakeup != NULL) {
322 					lck->l_wakeup(lck, myreq->lr_watcher);
338 		if (lck->l_wakeup) {
342 				lck->l_wakeup(lck, myreq->lr_watcher);
352 _lock_grant(struct lock *lck __unused /* unused */, struct lockuser *lu)