1io_uring_sqring_wait(3)         liburing Manual        io_uring_sqring_wait(3)
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NAME

6       io_uring_sqring_wait - wait for free space in the SQ ring
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SYNOPSIS

9       #include <liburing.h>
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11       int io_uring_sqring_wait(struct io_uring *ring);
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DESCRIPTION

14       The  function  io_uring_sqring_wait(3)  allows  the  caller to wait for
15       space to free up in the SQ ring belonging to the ring param, which hap‐
16       pens  when  the kernel side thread has consumed one or more entries. If
17       the SQ ring is currently non-full, no action is taken.
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19       This feature can only be used when the ring has been  setup  with  IOR‐
20       ING_SETUP_SQPOLL  and  hence  is using an offloaded approach to request
21       submissions.
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RETURN VALUE

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

29       io_uring_submit(3), io_uring_wait_cqe(3), io_uring_wait_cqes(3)
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33liburing-2.1                   January 25, 2022        io_uring_sqring_wait(3)
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