Io uring

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<tt>resv</tt> must be zeroed out. In the absence of flags, the uring uses interrupt-driven I/O. Calling <tt>close(2)</tt> on the returned descriptor frees all resources associated with the uring.

<tt>io_uring_setup(2)</tt> is wrapped by liburing's <tt>io_uring_queue_init(3)</tt> and <tt>io_uring_queue_init_params(3)</tt>. When using these wrappers, <tt>io_uring_queue_exit(3)</tt> should be used to clean up. ~~These wrappers operate on a <tt>struct io_uring</tt>:~~

<tt>io_uring_setup(2)</tt> is wrapped by liburing's <tt>io_uring_queue_init(3)</tt> and <tt>io_uring_queue_init_params(3)</tt>. When using these wrappers, <tt>io_uring_queue_exit(3)</tt> should be used to clean up.

struct io_uring {

int io_uring_queue_init(unsigned entries, struct io_uring *ring, unsigned flags);

struct io_uring_sq sq;

int io_uring_queue_init_params(unsigned entries, struct io_uring *ring, struct io_uring_params *params);

struct io_uring_cq cq;

void io_uring_queue_exit(struct io_uring *ring);

unsigned flags;

</syntaxhighlight>

int ring_fd;

unsigned features;

These wrappers operate on a <tt>struct io_uring</tt>:

int enter_ring_fd;

__u8 int_flags;

__u8 pad[3];