EIO_registerReceiveFn registers a callback function to receive events.
EIO_process performs socket stack processing.
EIO_close closes the I/O connection.
EIO_stackReset resets the I/O stack.
ESOK_close closes the socket connection.
ESOK_stackReset resets the socket stack.
If a select(3C) loop is used for receiving events, ESOK_getFdSet
can be used
to obtain relevant file descriptors.