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| FUTEX_LOCK_PI_ATOMIC(9) | Futex API reference | FUTEX_LOCK_PI_ATOMIC(9) |
NAME¶
futex_lock_pi_atomic - Atomic work required to acquire a pi aware futex
SYNOPSIS¶
int futex_lock_pi_atomic(u32 __user * uaddr, struct futex_hash_bucket * hb, union futex_key * key, struct futex_pi_state ** ps, struct task_struct * task, int set_waiters);
ARGUMENTS¶
u32 __user * uaddr
the pi futex user address
struct futex_hash_bucket * hb
the pi futex hash bucket
union futex_key * key
the futex key associated with uaddr and hb
struct futex_pi_state ** ps
the pi_state pointer where we store the result of the
lookup
struct task_struct * task
the task to perform the atomic lock work for. This will
be “current” except in the case of requeue pi.
int set_waiters
force setting the FUTEX_WAITERS bit (1) or not (0)
RETURN¶
0 - ready to wait; 1 - acquired the lock; <0 - error
The hb->lock and futex_key refs shall be held by the caller.
AUTHOR¶
Rusty Russell <rusty@rustcorp.com.au>
Author.
COPYRIGHT¶
| September 2017 | Kernel Hackers Manual 4.12 |