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Annotation of xinu/h/proc.h, revision 1.1.1.2

1.1       root        1: /* proc.h - isbadpid */
                      2: 
                      3: /* process table declarations and defined constants                    */
                      4: 
                      5: #ifndef        NPROC                           /* set the number of processes  */
1.1.1.2 ! root        6: #define        NPROC           10              /*  allowed if not already done */
1.1       root        7: #endif
                      8: 
                      9: /* process state constants */
                     10: 
1.1.1.2 ! root       11: #define        PRFREE          '\01'           /* process slot is free         */
        !            12: #define        PRCURR          '\02'           /* process is currently running */
        !            13: #define        PRREADY         '\03'           /* process is on ready queue    */
        !            14: #define        PRSUSP          '\04'           /* process is suspended         */
        !            15: #define        PRRECV          '\05'           /* process waiting for message  */
        !            16: #define        PRWAIT          '\06'           /* process is on semaphore queue*/
        !            17: #define        PRSLEEP         '\07'           /* process is sleeping          */
1.1       root       18: 
                     19: /* miscellaneous process definitions */
                     20: 
1.1.1.2 ! root       21: #ifdef lsi11
        !            22: #define        PNREGS          8               /* size of saved register area  */
1.1       root       23: #define        PNMLEN          8               /* length of process "name"     */
1.1.1.2 ! root       24: 
        !            25: #else
        !            26: #define        PNREGS          19              /* size of saved register area  */
        !            27: #define        PNMLEN          16              /* length of process "name"     */
        !            28: #endif
        !            29: 
1.1       root       30: #define        NULLPROC        0               /* id of the null process; it   */
                     31:                                        /*  is always eligible to run   */
                     32: 
                     33: #define        isbadpid(x)     (x<=0 || x>=NPROC)
                     34: 
                     35: /* process table entry */
                     36: 
                     37: struct pentry  {
1.1.1.2 ! root       38:        SAVEDPS pstatreg;               /* PS at time of call to disable*/
        !            39:        char    phasps;                 /* nonzero iff pstateg is valid */
1.1       root       40:        char    pstate;                 /* process state: PRCURR, etc.  */
                     41:        char    pname[PNMLEN];          /* process name                 */
1.1.1.2 ! root       42:        int     pprio;                  /* process priority             */
        !            43:        int     psem;                   /* semaphore if process waiting */
        !            44:        int     pargs;                  /* initial number of arguments  */
        !            45:        char    phasmsg;                /* nonzero iff pmsg is valid    */
        !            46:        WORD    pmsg;                   /* message sent to this process */
        !            47:        WORD    pregs[PNREGS];          /* saved registers PC, and PS   */
        !            48:        WORD    paddr;                  /* initial code address         */
        !            49:        WORD    pbase;                  /* base of run time stack       */
        !            50:        int     pstklen;                /* stack length                 */
        !            51:        WORD    plimit;                 /* lowest extent of stack       */
1.1       root       52: };
                     53: 
                     54: extern struct  pentry proctab[];
                     55: extern int     numproc;                /* currently active processes   */
                     56: extern int     nextproc;               /* search point for free slot   */
                     57: extern int     currpid;                /* currently executing process  */

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