NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON
io_uring_cqe_get_data(3) liburing Manual io_uring_cqe_get_data(3)
io_uring_cqe_get_data - get user data for completion event
#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);
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).
If the user_data value has been set before submitting the request, it will be returned. Otherwise the functions returns NULL.
io_uring_get_sqe(3), io_uring_sqe_set_data(3), io_uring_sqe_submit(3)
This page is part of the liburing (A library for io_uring) project. Information about the project can be found at ⟨https://github.com/axboe/liburing⟩. If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨https://github.com/axboe/liburing⟩ on 2022-12-17. (At that time, the date of the most recent commit that was found in the repository was 2022-12-12.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org liburing-2.1 November 15, 2021 io_uring_cqe_get_data(3)
Pages that refer to this page: io_uring_cqe_get_data(3), io_uring_cqe_get_data64(3), io_uring_get_sqe(3), io_uring_sqe_set_data(3), io_uring_sqe_set_data64(3)