74  * @uaddr:	address of first futex
76  * @val:	typically expected value of uaddr, but varies by op
92 #define futex(uaddr, op, val, timeout, uaddr2, val3, opflags) \  argument
93 	syscall(SYS_futex, uaddr, op | opflags, val, timeout, uaddr2, val3)
96  * futex_wait() - block on uaddr with optional timeout
100 futex_wait(futex_t *uaddr, futex_t val, struct timespec *timeout, int opflags)  in futex_wait()  argument
102 	return futex(uaddr, FUTEX_WAIT, val, timeout, NULL, 0, opflags);  in futex_wait()
106  * futex_wake() - wake one or more tasks blocked on uaddr
110 futex_wake(futex_t *uaddr, int nr_wake, int opflags)  in futex_wake()  argument
112 	return futex(uaddr, FUTEX_WAKE, nr_wake, NULL, NULL, 0, opflags);  in futex_wake()
116  * futex_wait_bitset() - block on uaddr with bitset
120 futex_wait_bitset(futex_t *uaddr, futex_t val, struct timespec *timeout,  in futex_wait_bitset()  argument
123 	return futex(uaddr, FUTEX_WAIT_BITSET, val, timeout, NULL, bitset,  in futex_wait_bitset()
128  * futex_wake_bitset() - wake one or more tasks blocked on uaddr with bitset
132 futex_wake_bitset(futex_t *uaddr, int nr_wake, u_int32_t bitset, int opflags)  in futex_wake_bitset()  argument
134 	return futex(uaddr, FUTEX_WAKE_BITSET, nr_wake, NULL, NULL, bitset,  in futex_wake_bitset()
139  * futex_lock_pi() - block on uaddr as a PI mutex
143 futex_lock_pi(futex_t *uaddr, struct timespec *timeout, int detect,  in futex_lock_pi()  argument
146 	return futex(uaddr, FUTEX_LOCK_PI, detect, timeout, NULL, 0, opflags);  in futex_lock_pi()
150  * futex_unlock_pi() - release uaddr as a PI mutex, waking the top waiter
153 futex_unlock_pi(futex_t *uaddr, int opflags)  in futex_unlock_pi()  argument
155 	return futex(uaddr, FUTEX_UNLOCK_PI, 0, NULL, NULL, 0, opflags);  in futex_unlock_pi()
162 futex_wake_op(futex_t *uaddr, futex_t *uaddr2, int nr_wake, int nr_wake2,  in futex_wake_op()  argument
165 	return futex(uaddr, FUTEX_WAKE_OP, nr_wake, nr_wake2, uaddr2, wake_op,  in futex_wake_op()
178 futex_requeue(futex_t *uaddr, futex_t *uaddr2, int nr_wake, int nr_requeue,  in futex_requeue()  argument
181 	return futex(uaddr, FUTEX_REQUEUE, nr_wake, nr_requeue, uaddr2, 0,  in futex_requeue()
186  * futex_cmp_requeue() - requeue tasks from uaddr to uaddr2
191 futex_cmp_requeue(futex_t *uaddr, futex_t val, futex_t *uaddr2, int nr_wake,  in futex_cmp_requeue()  argument
194 	return futex(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2,  in futex_cmp_requeue()
199  * futex_wait_requeue_pi() - block on uaddr and prepare to requeue to uaddr2
200  * @uaddr:	non-PI futex source
207 futex_wait_requeue_pi(futex_t *uaddr, futex_t val, futex_t *uaddr2,  in futex_wait_requeue_pi()  argument
210 	return futex(uaddr, FUTEX_WAIT_REQUEUE_PI, val, timeout, uaddr2, 0,  in futex_wait_requeue_pi()
215  * futex_cmp_requeue_pi() - requeue tasks from uaddr to uaddr2 (PI aware)
216  * @uaddr:	non-PI futex source
222 futex_cmp_requeue_pi(futex_t *uaddr, futex_t val, futex_t *uaddr2, int nr_wake,  in futex_cmp_requeue_pi()  argument
225 	return futex(uaddr, FUTEX_CMP_REQUEUE_PI, nr_wake, nr_requeue, uaddr2,  in futex_cmp_requeue_pi()
231  * @uaddr:	The address of the futex to be modified
241 futex_cmpxchg(futex_t *uaddr, u_int32_t oldval, u_int32_t newval)  in futex_cmpxchg()  argument
243 	return __sync_val_compare_and_swap(uaddr, oldval, newval);  in futex_cmpxchg()
248  * @uaddr:	The address of the futex to be modified
253 futex_dec(futex_t *uaddr)  in futex_dec()  argument
255 	return __sync_sub_and_fetch(uaddr, 1);  in futex_dec()
260  * @uaddr:	the address of the futex to be modified
265 futex_inc(futex_t *uaddr)  in futex_inc()  argument
267 	return __sync_add_and_fetch(uaddr, 1);  in futex_inc()
272  * @uaddr:	the address of the futex to be modified
278 futex_set(futex_t *uaddr, u_int32_t newval)  in futex_set()  argument
280 	*uaddr = newval;  in futex_set()