io_uring_prep_futex_waitv - prepare a futex waitv request

       The  io_uring_prep_futex_waitv(3) function prepares a futex wait request for multiple futexes at the same
       time.  The submission queue entry sqe is setup for waiting on all futexes given by futexv and nr_futex is
       the number of futexes in that array.  flags must be set to the io_uring specific futex flags.

       Unlike io_uring_prep_futex_wait(3), the desired bitset mask and values are passed in futexv.

       flags are currently unused and hence 0 must be passed.

       This function prepares an async futex(2) waitv request. See that man page for details.

       Available since kernel 6.7.

       The CQE res field will contain the result of the operation. See the  related  man  page  for  details  on
       possible  values. Note that where synchronous system calls will return -1 on failure and set errno to the
       actual error value, io_uring never uses errno.  Instead it returns the negated errno directly in the  CQE
       res field.

       io_uring_prep_futex_waitv - prepare a futex waitv request

       Unlike  the  sync futex syscalls that wait on a futex, io_uring does not support passing in a timeout for
       the request. Instead, applications are encouraged to use a linked timeout to abort the futex request at a
       given time, if desired.

       None

io_uring_get_sqe(3),   io_uring_submit(3),   io_uring_prep_futex_wait(3),    io_uring_prep_futex_wake(3),
       io_uring_prep_link_timeout(3), futex(2) futex2(2)

liburing-2.5                                      Sep 29, 2023                      io_uring_prep_futex_waitv(3)

#include<linux/futex.h>#include<unistd.h>#include<liburing.h>voidio_uring_prep_futex_waitv(structio_uring_sqe*sqe,structfutex_waitv*futexv,uint32_tnr_futex,unsignedintflags);