Which version of epoll do you have? The epoll_wait()
function does not accept an event mask (like you write above,
EPOLLIN|EPOLLOUT).
lol, I was a bit tired when I wrote that. Ok, ignore the stuff related to epoll_wait in my previous post.
As optimization, if the EPOLLOUT bit is already set, you
don't need to keep calling epoll_ctl(fd,MOD,EPOLLOUT).
This is good to know.
So, I've got a few questions about what happens to data that accumulates while I am sending and the fd is set to EPOLLOUT? If I am send out a large buffer and incoming data wants to stream in on a full duplex connection, what happens to that data when I am processing the socket while it is in epollout mode?
Is the following accurate? When data comes in while I am sending, I guess the data fills up the receive buffers until they are full and then it stops accepting data until it is cleared out? When I switch back to EPOLLIN, I'm guessing that I will get a notification on that fd that there is data waiting.
The other question I have is there a way to do full-duplex networking so that I can receive network messages while I am sending or vice versa? It seems that the method of switching the socket between EPOLLIN and EPOLLOUT means that I can't do both operations simultaneously. Thanks