Io uring: Difference between revisions

All transring messages are prepared using the target uring's file descriptor, and thus aren't particularly compatible with the higher-level liburing API (of course, you can just yank <tt>ring_fd</tt> out of <tt>struct iouring</tt>). That's unfortunate, because this functionality is very useful in a multithreaded environment. Note that the ring to which the SQE is submitted can itself be the target of the message!

<syntaxhighlight lang="c">

void io_uring_prep_msg_ring(struct io_uring_sqe *sqe, int fd, unsigned int len, __u64 data, unsigned int flags);

void io_uring_prep_msg_ring_cqe_flags(struct io_uring_sqe *sqe, int fd, unsigned int len, __u64 data, unsigned int flags, unsigned int cqe_flags);