Module futex

Expand description

Futex (Fast Userspace Mutex) syscall handlers

Structs§

FUTEX_BUCKET_CAPACITY 🔒: Max distinct futex addresses per bucket.
FUTEX_QUEUE_BUCKETS 🔒: Number of independent hash buckets. Must be a power of two.
FUTEX_WAITERS_CAPACITY 🔒: Max concurrent waiters on a single futex address.

atomic_cmpxchg_u32 🔒: Performs the atomic cmpxchg u32 operation.
atomic_fetch_update_u32 🔒: Performs the atomic fetch update u32 operation.
do_requeue 🔒: Performs the do requeue operation.
futex_bucket 🔒
futex_bucket_index 🔒
get_queue 🔒: Returns queue.
lock_two_queues 🔒: Performs the lock two queues operation.
lookup_queue 🔒
read_u32 🔒: Reads u32.
sys_futex_cmp_requeue: SYS_FUTEX_CMP_REQUEUE: Conditional requeue
sys_futex_requeue: SYS_FUTEX_REQUEUE: Requeue waiters from one futex to another
sys_futex_wait: SYS_FUTEX_WAIT: Wait on a futex
sys_futex_wake: SYS_FUTEX_WAKE: Wake waiters on a futex
sys_futex_wake_op: SYS_FUTEX_WAKE_OP: Wake with atomic operation
try_gc_queue 🔒: Removes the queue entry for addr from its bucket if the queue is empty.
wake_from_waiters 🔒: Performs the wake from waiters operation.