io_uring_wait_cqe_nr(3) — Linux manual page


io_uring_wait_cqe_nr(3)      liburing Manual     io_uring_wait_cqe_nr(3)

NAME         top

       io_uring_wait_cqe_nr - wait for one or more io_uring completion

SYNOPSIS         top

       #include <liburing.h>

       int io_uring_wait_cqe_nr(struct io_uring *ring,
                                struct io_uring_cqe **cqe_ptr,
                                unsigned wait_nr);

DESCRIPTION         top

       The io_uring_wait_cqe_nr(3) function returns wait_nr IO
       completion events from the queue belonging to the ring param,
       waiting for it if necessary. If the requested number of events
       are 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

RETURN VALUE         top

       On success io_uring_wait_cqe_nr(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.

SEE ALSO         top

       io_uring_submit(3), io_uring_wait_cqes(3)

COLOPHON         top

       This page is part of the liburing (A library for io_uring)
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       was obtained from the project's upstream Git repository
       ⟨⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
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liburing-2.1                November 15, 2021    io_uring_wait_cqe_nr(3)

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