NAME

       io_uring_sqring_wait - wait for free space in the SQ ring

SYNOPSIS

       #include <liburing.h>

       int io_uring_sqring_wait(struct io_uring *ring);

DESCRIPTION

       The  function  io_uring_sqring_wait(3)  allows  the  caller  to  wait for space to free up in the SQ ring
       belonging to the ring param, which happens when the kernel side thread has consumed one or more  entries.
       If the SQ ring is currently non-full, no action is taken.

       This feature can only be used when the ring has been setup with IORING_SETUP_SQPOLL and hence is using an
       offloaded approach to request submissions.

RETURN VALUE

       On success it returns the free space. If the kernel does not support the feature, -EINVAL is returned.

SEE ALSO

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

liburing-2.1                                    January 25, 2022                         io_uring_sqring_wait(3)