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Annotation of 43BSD/ingres/source/ctlmod/pipes.h, revision 1.1

1.1     ! root        1: /*
        !             2: **  PIPES.H -- definitions for pipe blocks.
        !             3: **
        !             4: **     Version:
        !             5: **             @(#)pipes.h     8.1     12/31/84
        !             6: */
        !             7: 
        !             8: # ifndef PB_DBSIZE
        !             9: 
        !            10: /*
        !            11: **  The 'pb_t' (pipe block type) should be arranged so that the
        !            12: **  size of the structure excluding pb_xptr is some nice power
        !            13: **  of two.
        !            14: */
        !            15: 
        !            16: # define       PB_DBSIZE       116
        !            17: # define       PB_IOSIZE       128
        !            18: 
        !            19: typedef struct _pb_t
        !            20: {
        !            21:        char    pb_st;          /* the state to enter */
        !            22:        char    pb_proc;        /* the proc to enter */
        !            23:        char    pb_resp;        /* the proc to respond to */
        !            24:        char    pb_padxx;       /* --- unused at this time --- */
        !            25:        char    pb_from;        /* the immediate writer of this block */
        !            26:        char    pb_type;        /* the block type, see below */
        !            27:        short   pb_stat;        /* a status word, see below */
        !            28:        short   pb_nused;       /* the number of bytes used in this block */
        !            29:        short   pb_nleft;       /* the number of bytes left in this block */
        !            30:        char    pb_data[PB_DBSIZE];     /* the data area */
        !            31:        char    *pb_xptr;       /* the data pointer (not written) */
        !            32: }  pb_t;
        !            33: 
        !            34: /* possible values for pb_type */
        !            35: # define       PB_NOTYPE       0       /* unknown type */
        !            36: # define       PB_REG          1       /* regular block */
        !            37: # define       PB_RESP         2       /* response block */
        !            38: # define       PB_ERR          3       /* error message */
        !            39: # define       PB_SYNC         4       /* interrupt sync */
        !            40: # define       PB_RESET        5       /* system reset */
        !            41: # define       PB_TRACE        6       /* set new trace flags */
        !            42: /* more meta definitions go before this line */
        !            43: 
        !            44: /* definitions for pb_stat */
        !            45: # define       PB_EOF          00001   /* end of file block */
        !            46: # define       PB_FRFR         00002   /* originated from front end */
        !            47: # define       PB_INFO         00004   /* info purposes only, no response */
        !            48: 
        !            49: /* definitions for pb_proc */
        !            50: # define       PB_WILD         -2      /* all processes */
        !            51: # define       PB_UNKNOWN      -1      /* unknown */
        !            52: # define       PB_FRONT        0       /* front end */
        !            53: /* other processes are given numbers from 2 */
        !            54: 
        !            55: /* definitions for pb_st */
        !            56: /* define      PB_UNKNOWN      -1      */
        !            57: # define       PB_NONE         0       /* response block */
        !            58: 
        !            59: # endif PB_DBSIZE

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