NAME

       io_uring_wait_cqe_timeout - wait for one io_uring completion event with timeout

SYNOPSIS

       #include <liburing.h>

       int io_uring_wait_cqe_timeout(struct io_uring *ring,
                                     struct io_uring_cqe **cqe_ptr,
                                     struct __kernel_timespec *ts);

DESCRIPTION

       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.

RETURN VALUE

       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.

SEE ALSO

       io_uring_submit(3), io_uring_wait_cqes(3), io_uring_wait_cqe(3)