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Annotation of 3BSD/sys/h/proc.h, revision 1.1

1.1     ! root        1: /*     proc.h  2.1     1/5/80  */
        !             2: 
        !             3: /*
        !             4:  * One structure allocated per active
        !             5:  * process. It contains all data needed
        !             6:  * about the process while the
        !             7:  * process may be swapped out.
        !             8:  * Other per process data (user.h)
        !             9:  * is swapped with the process.
        !            10:  */
        !            11: struct proc
        !            12: {
        !            13:        char    p_stat;
        !            14:        char    p_slptime;      /* time since last block */
        !            15:        short   p_flag;
        !            16:        short   p_cpu;          /* cpu usage for scheduling */
        !            17:        short   p_time;         /* resident time for scheduling */
        !            18:        char    p_pri;          /* priority, negative is high */
        !            19:        char    p_nice;         /* nice for cpu usage */
        !            20:        short   p_sig;          /* signals pending to this process */
        !            21:        short   p_uid;          /* user id, used to direct tty signals */
        !            22:        short   p_pgrp;         /* name of process group leader */
        !            23:        short   p_pid;          /* unique process id */
        !            24:        short   p_ppid;         /* process id of parent */
        !            25:        short   p_addr[UPAGES]; /* page table entries of u-area */
        !            26:        short   p_poip;         /* count of page outs in progress */
        !            27:        short   p_szpt;         /* copy of page table size */
        !            28:        size_t  p_tsize;        /* size of text (clicks) */
        !            29:        size_t  p_dsize;        /* size of data space (clicks) */
        !            30:        size_t  p_ssize;        /* copy of stack size (clicks) */
        !            31:        size_t  p_rssize;       /* current resident set size in clicks */
        !            32:        size_t  p_swrss;        /* resident set size before last swap */
        !            33:        swblk_t p_swaddr;       /* disk address of u area when swapped */
        !            34:        caddr_t p_wchan;        /* event process is awaiting */
        !            35:        struct  text *p_textp;  /* pointer to text structure */
        !            36:        struct  proc *p_link;   /* linked list of running processes */
        !            37:        int     p_clktim;       /* time to alarm clock signal */
        !            38:        struct  pte *p_p0br;    /* page table base P0BR */
        !            39:        struct  proc *p_xlink;  /* linked list of procs sharing same text */
        !            40:        short   p_faults;       /* faults in last second */
        !            41:        short   p_aveflt;       /* average of p_faults into past */
        !            42:        short   p_ndx;          /* proc index for memall (because of vfork) */
        !            43: };
        !            44: 
        !            45: #ifdef KERNEL
        !            46: extern struct proc proc[];     /* the proc table itself */
        !            47: 
        !            48: struct proc *runq;             /* pointer to linked list of running processes */
        !            49: #endif
        !            50: 
        !            51: /* stat codes */
        !            52: #define        SSLEEP  1               /* awaiting an event */
        !            53: #define        SWAIT   2               /* (abandoned state) */
        !            54: #define        SRUN    3               /* running */
        !            55: #define        SIDL    4               /* intermediate state in process creation */
        !            56: #define        SZOMB   5               /* intermediate state in process termination */
        !            57: #define        SSTOP   6               /* process being traced */
        !            58: 
        !            59: /* flag codes */
        !            60: #define        SLOAD   0x0001          /* in core */
        !            61: #define        SSYS    0x0002          /* swapper or pager process */
        !            62: #define        SLOCK   0x0004          /* process being swapped out */
        !            63: #define        SSWAP   0x0008          /* save area flag */
        !            64: #define        STRC    0x0010          /* process is being traced */
        !            65: #define        SWTED   0x0020          /* another tracing flag */
        !            66: #define        SULOCK  0x0040          /* user settable lock in core */
        !            67: #define        SPAGE   0x0080          /* process in page wait state */
        !            68: #define        SKEEP   0x0100          /* another flag to prevent swap out */
        !            69: #define        SDLYU   0x0200          /* delayed unlock of pages */
        !            70: #define        SWEXIT  0x0400          /* working on exiting */
        !            71: #define        SUNUSED 0x0800          /* used to be page out in progress */
        !            72: #define        SVFORK  0x1000          /* process resulted from vfork() */
        !            73: #define        SVFDONE 0x2000          /* another vfork flag */
        !            74: #define        SNOVM   0x4000          /* no vm, parent in a vfork() */
        !            75: #define        SPAGI   0x8000          /* init data space on demand, from inode */
        !            76: 
        !            77: /*
        !            78:  * parallel proc structure
        !            79:  * to replace part with times
        !            80:  * to be passed to parent process
        !            81:  * in ZOMBIE state.
        !            82:  */
        !            83: struct xproc
        !            84: {
        !            85:        char    xp_stat;
        !            86:        char    xp_slptime;
        !            87:        short   xp_flag;
        !            88:        short   xp_cpu;         /* cpu usage for scheduling */
        !            89:        short   xp_time;        /* resident time for scheduling */
        !            90:        char    xp_pri;         /* priority, negative is high */
        !            91:        char    xp_nice;        /* nice for cpu usage */
        !            92:        short   xp_sig;         /* signals pending to this process */
        !            93:        short   xp_uid;         /* user id, used to direct tty signals */
        !            94:        short   xp_pgrp;        /* name of process group leader */
        !            95:        short   xp_pid;         /* unique process id */
        !            96:        short   xp_ppid;        /* process id of parent */
        !            97:        short   xp_xstat;       /* Exit status for wait */
        !            98:        time_t  xp_utime;       /* user time, this proc */
        !            99:        time_t  xp_stime;       /* system time, this proc */
        !           100: };

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