NAME

       io_uring_wait_cqe - wait for one io_uring completion event

SYNOPSIS

       #include <liburing.h>

       int io_uring_wait_cqe(struct io_uring *ring,
                             struct io_uring_cqe **cqe_ptr);

DESCRIPTION

       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).

RETURN VALUE

       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.

SEE ALSO

       io_uring_submit(3), io_uring_wait_cqe_timeout(3), io_uring_wait_cqes(3)