# epoll_wait wrapper
# ARGS: (epfd, maxevents, timeout (milliseconds), arrayref)
# arrayref: values modified to be [$fd, $event]
-our $epoll_wait_events;
+our $epoll_wait_events = '';
our $epoll_wait_size = 0;
sub epoll_wait_mod4 {
my ($epfd, $maxevents, $timeout_msec, $events) = @_;