common/os/rwlock.c

214 	uintptr_t old = lp->rw_wwwh;
217 		return ((old & RW_LOCKED) && !(old & RW_WRITE_LOCKED));
220 		return ((old & RW_OWNER) == (uintptr_t)curthread);
238 	uintptr_t old, new, lock_value, lock_busy, lock_wait;
255 		if (((old = lp->rw_wwwh) & lock_busy) == 0) {
256 			if (casip(&lp->rw_wwwh, old, old + lock_value) != old) {
273 		if ((old & RW_DOUBLE_LOCK) == RW_DOUBLE_LOCK) {
278 		if ((old & RW_OWNER) == (uintptr_t)curthread) {
286 			if (((old = lp->rw_wwwh) & lock_busy) == 0)
288 			new = old | lock_wait;
289 		} while (old != new && casip(&lp->rw_wwwh, old, new) != old);
291 		if ((old & lock_busy) == 0) {
320 		    (old & RW_WRITE_LOCKED) ? 1 : 0,
321 		    old >> RW_HOLD_COUNT_SHIFT);
369 	uintptr_t old, new, lock_value;
377 	old = lp->rw_wwwh;
378 	if (old & RW_WRITE_LOCKED) {
379 		if ((old & RW_OWNER) != (uintptr_t)curthread) {
386 		if ((old & RW_LOCKED) == 0) {
398 		old = lp->rw_wwwh;
399 		new = old - lock_value;
401 			if (casip(&lp->rw_wwwh, old, new) != old) {
422 		if ((old & RW_WRITE_LOCKED) &&
474 	uintptr_t old;
481 			if ((old = lp->rw_wwwh) & RW_WRITE_CLAIMED) {
485 			if (casip(&lp->rw_wwwh, old, old + RW_READ_LOCK) == old)
540 	uintptr_t old, new;
545 		if (((old = lp->rw_wwwh) & ~RW_HAS_WAITERS) != RW_READ_LOCK)
547 		new = old + RW_WRITE_LOCK(curthread) - RW_READ_LOCK;
548 	} while (casip(&lp->rw_wwwh, old, new) != old);
583 	uintptr_t old = ((rwlock_impl_t *)rwlp)->rw_wwwh;
585 	ASSERT(old & RW_LOCKED);
586 	return ((old & RW_LOCKED) && !(old & RW_WRITE_LOCKED));
601 	uintptr_t old = ((rwlock_impl_t *)rwlp)->rw_wwwh;
603 	return ((old & RW_WRITE_LOCKED) ? (kthread_t *)(old & RW_OWNER) : NULL);