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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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io_uring_peek_cqe(3) liburing Manual io_uring_peek_cqe(3)
io_uring_peek_cqe - check if an io_uring completion event is
available
#include <liburing.h>
int io_uring_peek_cqe(struct io_uring *ring,
struct io_uring_cqe **cqe_ptr);
The io_uring_peek_cqe(3) function returns an IO completion from
the queue belonging to the ring param, if one is readily
available. On successful return, cqe_ptr param is filled with a
valid CQE entry.
This function does not enter the kernel to wait for an event, an
event is only returned if it's already available in the CQ ring.
On success io_uring_peek_cqe(3) returns 0 and the cqe_ptr
parameter is filled in. On failure it returns -EAGAIN.
io_uring_submit(3), io_uring_wait_cqes(3), io_uring_wait_cqe(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 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-03.) 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-2.2 March 12, 2022 io_uring_peek_cqe(3)
Pages that refer to this page: io_uring_setup(2), io_uring_cq_advance(3), io_uring_cqe_seen(3), io_uring_peek_cqe(3)
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HTML rendering created 2024-06-26 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. |
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