io_uring_wait_cqe(3) liburing Manual io_uring_wait_cqe(3)
io_uring_wait_cqe - wait for one io_uring completion event
#include <liburing.h> int io_uring_wait_cqe(struct io_uring *ring, struct io_uring_cqe **cqe_ptr);
The io_uring_wait_cqe(3) function waits for an IO completion from the queue belonging to the ring param, waiting for it if necessary. If an event is already available in the ring when invoked, no waiting will occur. The cqe_ptr param is filled in on success. After the caller has submitted a request with io_uring_submit(3), the application can retrieve the completion with io_uring_wait_cqe(3).
On success io_uring_wait_cqe(3) returns 0 and the cqe_ptr param is filled in. On failure it returns -errno. The return value indicates the result of waiting for a CQE, and it has no relation to the CQE result itself.
io_uring_submit(3), io_uring_wait_cqe_timeout(3), io_uring_wait_cqes(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 firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/axboe/liburing⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-06-22.) 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 email@example.com liburing-2.1 November 15, 2021 io_uring_wait_cqe(3)
Pages that refer to this page: io_uring_cq_advance(3), io_uring_cqe_get_data(3), io_uring_cqe_get_data64(3), io_uring_cqe_seen(3), io_uring_cq_ready(3), io_uring_for_each_cqe(3), io_uring_peek_cqe(3), io_uring_sqring_wait(3), io_uring_submit_and_wait_timeout(3), io_uring_wait_cqe(3), io_uring_wait_cqe_nr(3), io_uring_wait_cqes(3), io_uring_wait_cqe_timeout(3)