NAME

       io_uring_cqe_get_data - get user data for completion event

SYNOPSIS

       #include <liburing.h>

       void *io_uring_cqe_get_data(struct io_uring_cqe *cqe);

       __u64 io_uring_cqe_get_data64(struct io_uring_cqe *cqe);

DESCRIPTION

       The  io_uring_cqe_get_data(3)  function  returns  the  user_data with the completion queue
       entry cqe as a data pointer.

       The io_uring_cqe_get_data64(3) function returns the user_data with  the  completion  queue
       entry cqe as a 64-bit data value.

       After  the  caller  has received a completion queue entry (CQE) with io_uring_wait_cqe(3),
       the application can call io_uring_cqe_get_data(3) or  io_uring_cqe_get_data64(3)  function
       to  retrieve  the  user_data value. This requires that user_data has been set earlier with
       the function io_uring_sqe_set_data(3) or io_uring_sqe_set_data64(3).

RETURN VALUE

       If the user_data value has been set before submitting the request, it  will  be  returned.
       Otherwise the functions returns NULL.

SEE ALSO

       io_uring_get_sqe(3), io_uring_sqe_set_data(3), io_uring_sqe_submit(3)