42 int _blockcount_sleep(blockcount_t *bc, struct lock_object *, const char *wmesg,
44 void _blockcount_wakeup(blockcount_t *bc, u_int old);
47 blockcount_init(blockcount_t *bc)  in blockcount_init()  argument
49 	atomic_store_int(&bc->__count, 0);  in blockcount_init()
53 blockcount_acquire(blockcount_t *bc, u_int n)  in blockcount_acquire()  argument
58 	old = atomic_fetchadd_int(&bc->__count, n);  in blockcount_acquire()
59 	KASSERT(old + n > old, ("%s: counter overflow %p", __func__, bc));  in blockcount_acquire()
61 	atomic_add_int(&bc->__count, n);  in blockcount_acquire()
66 blockcount_release(blockcount_t *bc, u_int n)  in blockcount_release()  argument
71 	old = atomic_fetchadd_int(&bc->__count, -n);  in blockcount_release()
72 	KASSERT(old >= n, ("%s: counter underflow %p", __func__, bc));  in blockcount_release()
74 		_blockcount_wakeup(bc, old);  in blockcount_release()
78 _blockcount_wait(blockcount_t *bc, struct lock_object *lo, const char *wmesg,  in _blockcount_wait()  argument
83 	while (_blockcount_sleep(bc, lo, wmesg, prio) == EAGAIN)  in _blockcount_wait()
87 #define	blockcount_sleep(bc, lo, wmesg, prio)	\  argument
88 	_blockcount_sleep((bc), (struct lock_object *)(lo), (wmesg), (prio))
89 #define	blockcount_wait(bc, lo, wmesg, prio)	\  argument
90 	_blockcount_wait((bc), (struct lock_object *)(lo), (wmesg), (prio))