io_uring_cqe_nr(3)              liburing Manual             io_uring_cqe_nr(3)

NAME
       io_uring_cqe_nr - return the number of CQ ring slots consumed by a CQE

SYNOPSIS
       #include <liburing.h>

       unsigned io_uring_cqe_nr(const struct io_uring_cqe *cqe);

DESCRIPTION
       The io_uring_cqe_nr(3) function returns the number of CQ ring slots
       consumed by cqe.  For normal 16-byte CQEs, this returns 1. For 32-byte
       CQEs (when IORING_CQE_F_32 is set in the CQE flags), this returns 2.

       This function is useful when advancing the CQ ring with
       io_uring_cq_advance(3) on rings that use IORING_SETUP_CQE_MIXED where
       both 16-byte and 32-byte CQEs may be present.


RETURN VALUE
       Returns 1 for normal CQEs, or 2 for 32-byte CQEs.

SEE ALSO
       io_uring_cq_advance(3), io_uring_cqe_seen(3), io_uring_setup(2)

liburing-2.12                  January 18, 2025             io_uring_cqe_nr(3)