#include "unify.h"
int Get_Ticket(int seq_id);
Get_Ticket(3) returns the next sequence number from the
sequencer referenced by seq_id.
Get_Ticket(3) returns the next sequencer number from teh
sequencer referenced by seq_id upon successful completion.
Otherwise, a value of -1 is returned.
An error may occur if seq_id is not a valid sequencer identifier.