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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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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 io-uring@vger.kernel.org. This page
was obtained from the project's upstream Git repository
⟨https://github.com/axboe/liburing⟩ on 2025-08-11. (At that time,
the date of the most recent commit that was found in the
repository was 2025-08-02.) 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
man-pages@man7.org
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_batch_cqe(3), io_uring_peek_cqe(3), io_uring_register_clock(3), io_uring_sqring_wait(3), io_uring_submit_and_wait_min_timeout(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_cqes_min_timeout(3), io_uring_wait_cqe_timeout(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|