oracular (3) io_uring_cq_has_overflow.3.gz

NAME

       io_uring_cq_has_overflow - returns if there are overflow entries waiting to move to the CQ ring

SYNOPSIS

       #include <liburing.h>

       bool io_uring_cq_has_overflow(const struct io_uring *ring);

DESCRIPTION

       The  io_uring_cq_has_overflow(3)  function  informs the application if CQ entries have overflowed and are
       waiting to be flushed to the CQ ring. For example using io_uring_get_events(3)

NOTES

       Using this function is only valid if the ring has IORING_FEAT_NODROP set, as it's checking for a flag set
       by  kernels  supporting  that  feature.  For  really  old kernels that don't support this feature, if CQE
       overflow is experienced the CQEs are lost. If  that  happens,  the  CQ  ring  overflow  offset  will  get
       incremented.

RETURN VALUE

       True if there are CQ entries waiting to be flushed to the CQ ring.

SEE ALSO

       io_uring_get_events(3)