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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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io_uring_wait_cqes(3) liburing Manual io_uring_wait_cqes(3)
io_uring_wait_cqes - wait for one or more io_uring completion
events
#include <liburing.h>
int io_uring_wait_cqes(struct io_uring *ring,
struct io_uring_cqe **cqe_ptr,
unsigned wait_nr,
struct __kernel_timespec *ts,
sigset_t *sigmask);
The io_uring_wait_cqes(3) function returns wait_nr IO completions
from the queue belonging to the ring param, waiting for them if
necessary or until the timeout ts expires.
The sigmask specifies the set of signals to block. If set, it is
equivalent to atomically executing the following calls:
sigset_t origmask;
pthread_sigmask(SIG_SETMASK, &sigmask, &origmask);
ret = io_uring_wait_cqes(ring, cqe, wait_nr, ts, NULL);
pthread_sigmask(SIG_SETMASK, &origmask, NULL);
The cqe_ptr param is filled in on success with the first CQE.
Callers of this function should use io_uring_for_each_cqe(3) to
iterate all available CQEs.
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.
On success io_uring_wait_cqes(3) returns 0 and the cqe_ptr param
is filled in. On failure it returns -errno.
io_uring_submit(3), io_uring_for_each_cqe(3),
io_uring_wait_cqe_timeout(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-2.1 November 15, 2021 io_uring_wait_cqes(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_peek_cqe(3), io_uring_sqring_wait(3), io_uring_wait_cqe(3), io_uring_wait_cqe_nr(3), io_uring_wait_cqes(3), io_uring_wait_cqe_timeout(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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