usr/sys/h/mpx.h

#define M       3
#define C       100

/*
 * character Q structure
 */
struct  clist
{
        int     c_cc;
        int     c_cf;
        int     c_cl;
};

struct  chan
{
        char    cflag;
        char    m, c;
        struct  chan    *dest;
        struct  clist   ioq;
};

/* c flags */
#define BLOCK   01

struct  line
{
        char    xbuf[24+2];
        char    rbuf[100+2];
        char    rseq;
        char    xseq;
        char    ackf;
        char    xflag;
        char    state;
        char    time;
        int     sum;
        char    *ip;
        char    *ep;
};
#define WWAIT   02
#define CRUN    04
#define RWAIT   010
#define ALLOC   020
#define DIS     040
#define DLY     0100

/*
 * machine structure
 */
struct  mach
{
        char    mflag;
        char    rchan;
        char    rcount;
        char    xchan;
        char    xcount;
        struct  clist   ackq;
        struct  clist   datq;
        struct  clist   disq;
        struct  chan    *chanp[128];
};

/* m flags */
#define RNEXT   01
#define MRUN    04
#define XNEXT   010

/*
 * trace buffer
 */
#define TBSIZ   100