Linux and I/O completion ports?

Using winsock, you can configure sockets or seperate I/O operations to "overlap". This means that calls to perform I/O are returned immediately, while the actual operations are completed asynchronously by separate worker threads.

Winsock also provides "completion ports". From what I understand, a completion port acts as a multiplexer of handles (sockets). A handle can be demultiplexed if it isn't in the middle of an I/O operation, i.e. if all its I/O operations are completed.

So, on to my question... does linux support completion ports or even asynchronous I/O for sockets?

So, on to my question... does linux support completion ports or even asynchronous I/O for sockets?

With regard to sockets, in 5.3 and later kernels, Linux has something analogous to completion ports in the shape of io_uring (for files/block devices io_uring support appeared in the 5.1 kernel).