Feature #21837
Updated by noteflakes (Sharon Rosner) 3 months ago
Currently the fiber scheduler interface does not support any socket operations. The stock Ruby socket implementation performs all operations in a non-blocking way, and invokes the `#io_wait` fiber scheduler hook in order to wait for readiness. Adding fiber scheduler hooks for socket I/O will allow using io_uring to perform socket I/O directly without waiting for socket readiness.
I propose adding the following hooks:
- `#socket_recv(sock, buffer, length, flags, recvfrom)`: performs a `recv` or `recvfrom`. The `recvfrom` argument is a boolean denoting whether a `recvfrom` should be performed. When true, the hook should return an array containing the number of bytes received and the source address. When false, the hook should return the number of bytes received.
- `#socket_send(sock, dest, buffer, length, flags)`: performs a `send` or `sendto`. The `dest` argument is nil for a `send`. When not nil, a `sendto` operation should be done.
- `#socket_connect(sock, addr)`: performs a `connect`.
- `#socket_accept(sock, client_sockaddr)` - performs an `accept`. The `client_sockaddr` argument is an `IO::Buffer` that receives the peer addrinfo.
The PR for this feature: https://github.com/ruby/ruby/pull/15865