Function io_uring_queue_mmap

src/setup.c:170–183

* For users that want to specify sq_thread_cpu or sq_thread_idle, this * interface is a convenient helper for mmap()ing the rings. * Returns -errno on error, or zero on success. On success, 'ring' * contains the necessary information to read/write to the rings. */

 * contains the necessary information to read/write to the rings.
 */
__cold int io_uring_queue_mmap(int fd, struct io_uring_params *p,
			       struct io_uring *ring)
{
	int ret;

	memset(ring, 0, sizeof(*ring));
	ret = io_uring_mmap(fd, p, &ring->sq, &ring->cq);
	if (!ret) {
		ring->flags = p->flags;
		ring->features = p->features;
		ring->ring_fd = ring->enter_ring_fd = fd;
	}
	return ret;
}

static size_t io_uring_sqes_size(const struct io_uring *ring)
{