io_uring_cqe_get_data - get user data for completion event

       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).

       io_uring_cqe_get_data - get user data for completion event

       If the user_data value has been set before submitting the request, it will be returned.   Otherwise,  the
       return value is undefined.

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

liburing-2.1                                    November 15, 2021                       io_uring_cqe_get_data(3)

#include<liburing.h>void*io_uring_cqe_get_data(structio_uring_cqe*cqe);__u64io_uring_cqe_get_data64(structio_uring_cqe*cqe);