other versions
- jessie 3.16.56-1+deb8u1
FUTEX_REQUEUE(9) | Futex API reference | FUTEX_REQUEUE(9) |
NAME¶
futex_requeue - Requeue waiters from uaddr1 to uaddr2SYNOPSIS¶
int
futex_requeue(u32 __user * uaddr1,
unsigned int flags,
u32 __user * uaddr2,
int nr_wake, int nr_requeue,
u32 * cmpval,
int requeue_pi);
ARGUMENTS¶
uaddr1source futex user address
flags
futex flags (FLAGS_SHARED, etc.)
uaddr2
target futex user address
nr_wake
number of waiters to wake (must be 1 for
requeue_pi)
nr_requeue
number of waiters to requeue (0-INT_MAX)
cmpval
uaddr1 expected value (or NULL)
requeue_pi
if we are attempting to requeue from a non-pi futex to a
pi futex (pi to pi requeue is not supported)
DESCRIPTION¶
Requeue waiters on uaddr1 to uaddr2. In the requeue_pi case, try to acquire uaddr2 atomically on behalf of the top waiter.RETURN¶
>=0 - on success, the number of tasks requeued or woken; <0 - on errorAUTHOR¶
Rusty Russell <rusty@rustcorp.com.au>Author.
COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |