implement SendMsgZc for more efficent tcp socket message passing

[Vrtgs]

Is your feature request related to a problem? Please describe.
In scenarios where we need to send large data buffers over sockets, the existing APIs require additional memory copies, which can lead to inefficiencies in terms of performance, especially in high-throughput applications.

Describe the solution you'd like
an Api as follows

monoio::net::send_message(&mut sock1, &mut sock2);

and

monoio::net::socket_copy_bidirectional(&mut sock1, &mut sock2);

Describe alternatives you've considered
tokio_splice but that doesn't use io_uring, furthermore splice still copies, just not as much as a full read then write

[ihciah]

In monoio there's splice support. Could you check if it works for your need?

[Vrtgs]

Can you point it to me in the docs?, because I couldn't find it

…

On Wed, Feb 5, 2025, 10:08 AM ihc童鞋@提不起劲 ***@***.***> wrote: In monoio there's splice support. Could you check if it works for your need? — Reply to this email directly, view it on GitHub <#333 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AWLOCCHWZDXLFOZQJKP4ZO32OG2HBAVCNFSM6AAAAABWPOPQ4WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMZVHA2TSNJQHA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[ihciah]

Here is the splice op: https://github.com/bytedance/monoio/blob/master/monoio/src/io/splice.rs
Here is the copy based on it(but it requires additional syscalls to create pipes so I recommend you to implement it by your own if it is very hot): https://github.com/bytedance/monoio/blob/master/monoio/src/io/util/copy.rs#L75

[Vrtgs]

Here is the splice op: https://github.com/bytedance/monoio/blob/master/monoio/src/io/splice.rs
Here is the copy based on it(but it requires additional syscalls to create pipes so I recommend you to implement it by your own if it is very hot): https://github.com/bytedance/monoio/blob/master/monoio/src/io/util/copy.rs#L75

Thanks a lot, this does help, but I think this should be documented on docs.rs, because it can't be found there, and there should also be a directional version