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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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io_uring_wait_cqe_timeout(3) liburing Manual io_uring_wait_cqe_timeout(3)
io_uring_wait_cqe_timeout - wait for one io_uring completion event
with timeout
#include <liburing.h>
int io_uring_wait_cqe_timeout(struct io_uring *ring,
struct io_uring_cqe **cqe_ptr,
struct __kernel_timespec *ts);
The io_uring_wait_cqe_timeout(3) function waits for one IO
completion to be available from the queue belonging to the ring
param, waiting for it if necessary or until the timeout ts
expires. If an event is already available in the ring when
invoked, no waiting will occur.
The cqe_ptr param is filled in on success.
If ts is specified and an older kernel without IORING_FEAT_EXT_ARG
is used, the application does not need to call io_uring_submit(3)
before calling io_uring_wait_cqes(3). For newer kernels with that
feature flag set, there is no implied submit when waiting for a
request.
If ts is NULL , then this behaves like io_uring_wait_cqe(3) in
that it will wait forever for an event.
On success io_uring_wait_cqe_timeout(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. If a timeout occurs, it will
return -ETIME.
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 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, 2021io_uring_wait_cqe_timeout(3)
Pages that refer to this page: io_uring_cq_advance(3), io_uring_cqe_seen(3), io_uring_for_each_cqe(3), io_uring_register_clock(3), io_uring_wait_cqe(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. |
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