epoll-server
This code uses epoll to check on a number of available sockets for traffic. A server thread creates 5 client threads and each client thread serves 5 clients.
The threads communicate with a multithreaded multiconsumer multiproducer ringbuffer, which signals when a new client has joined or left.
This allows the computer to scale with the number of connections and CPUs.
This is unlike the traditional forking server or multithreaded socket server which assigns 1 client to 1 thread. This design is more scalable.
The threaded variant epollserver_threaded.c uses Alexander Krizhanovsky's Lock-Free Multi-Producer Multi-Consumer Queue on Ring Buffer
future plans
I plan to separate the send and recv into their own threads, so sending and receiving can happen in parallel.