1io_uring_cq_has_overflow(3)     liburing Manual    io_uring_cq_has_overflow(3)
2
3
4

NAME

6       io_uring_cq_has_overflow  - returns if there are overflow entries wait‐
7       ing to move to the CQ ring
8

SYNOPSIS

10       #include <liburing.h>
11
12       bool io_uring_cq_has_overflow(const struct io_uring *ring);
13

DESCRIPTION

15       The io_uring_cq_has_overflow(3) function informs the application if  CQ
16       entries  have  overflowed and are waiting to be flushed to the CQ ring.
17       For example using io_uring_get_events(3)
18

NOTES

20       Using this function is only valid if the  ring  has  IORING_FEAT_NODROP
21       set,  as  it's  checking for a flag set by kernels supporting that fea‐
22       ture. For really old kernels that don't support this  feature,  if  CQE
23       overflow is experienced the CQEs are lost. If that happens, the CQ ring
24       overflow offset will get incremented.
25

RETURN VALUE

27       True if there are CQ entries waiting to be flushed to the CQ ring.
28

SEE ALSO

30       io_uring_get_events(3)
31
32
33
34liburing-2.3                   September 5, 2022   io_uring_cq_has_overflow(3)