Chapter 12. Futex API reference

Table of Contents

struct futex_q — The hashed futex queue entry, one per waiting task

hash_futex — Return the hash bucket in the global hash

match_futex — Check whether two futex keys are equal

get_futex_key — Get parameters which are the keys for a futex

fault_in_user_writeable — Fault in user address and verify RW access

futex_top_waiter — Return the highest priority waiter on a futex

futex_lock_pi_atomic — Atomic work required to acquire a pi aware futex

__unqueue_futex — Remove the futex_q from its futex_hash_bucket

requeue_futex — Requeue a futex_q from one hb to another

requeue_pi_wake_futex — Wake a task that acquired the lock during requeue

futex_proxy_trylock_atomic — Attempt an atomic lock for the top waiter

futex_requeue — Requeue waiters from uaddr1 to uaddr2

queue_me — Enqueue the futex_q on the futex_hash_bucket

unqueue_me — Remove the futex_q from its futex_hash_bucket

fixup_owner — Post lock pi_state and corner case management

futex_wait_queue_me queue_me and wait for wakeup, timeout, or signal

futex_wait_setup — Prepare to wait on a futex

handle_early_requeue_pi_wakeup — Detect early wakeup on the initial futex

futex_wait_requeue_pi — Wait on uaddr and take uaddr2

sys_set_robust_list — Set the robust-futex list head of a task

sys_get_robust_list — Get the robust-futex list head of a task