void vortex_io_waiting_set_add_to_fd_group ( VortexCtx ctx,
VortexIoAddToFdGroup  add_to 

Allows to configure the add socket to fd set operation.

The function will fail if the provided handler is NULL.

ctxThe context where the operation will be performed.
add_toThe handler to be invoked when it is required to add a socket descriptor into the fd set.