io_uring_cqe_get_data(3)        liburing Manual       io_uring_cqe_get_data(3)

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 return value is undefined.

SEE ALSO
       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)