/* these must change if the underlying
   cell representation changes */

typedef int qele_type;
#define qele_cpy(x,y) x=y
#define qele_incr(x) x+=1
#define q_NIL 0   
#define EMPTY -99
#define FULL -98
#define NORMAL -97

/* these define the "public interface" to the 
   operations legal on the cyclic buffer named "queue" */

extern qele_type q_get(void);
extern qele_type q_put(qele_type);
extern int q_free(void);
extern int q_bsy(void);

/* these change if the queue length is
   to change */

#define q_MAX 128
#define q_WRAP q_MAX-1