gnet_stats_copy_queue - copy queue statistics into statistics TLV
int gnet_stats_copy_queue (struct gnet_dump * d, struct gnet_stats_queue * q);
d dumping handle q queue statistics
Appends the queue statistics to the top level TLV created by gnet_stats_start_copy. Returns 0 on success or -1 with the statistic lock released if the room in the socket buffer was not sufficient.