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)