.ref-79029c32280d78322b4fb003d1cf99489dda7f1c/.ref-BSD-3/usr/src/sys/h/proc.h

/*      proc.h  2.1     1/5/80  */

/*
 * One structure allocated per active
 * process. It contains all data needed
 * about the process while the
 * process may be swapped out.
 * Other per process data (user.h)
 * is swapped with the process.
 */
struct  proc
{
        char    p_stat;
        char    p_slptime;      /* time since last block */
        short   p_flag;
        short   p_cpu;          /* cpu usage for scheduling */
        short   p_time;         /* resident time for scheduling */
        char    p_pri;          /* priority, negative is high */
        char    p_nice;         /* nice for cpu usage */
        short   p_sig;          /* signals pending to this process */
        short   p_uid;          /* user id, used to direct tty signals */
        short   p_pgrp;         /* name of process group leader */
        short   p_pid;          /* unique process id */
        short   p_ppid;         /* process id of parent */
        short   p_addr[UPAGES]; /* page table entries of u-area */
        short   p_poip;         /* count of page outs in progress */
        short   p_szpt;         /* copy of page table size */
        size_t  p_tsize;        /* size of text (clicks) */
        size_t  p_dsize;        /* size of data space (clicks) */
        size_t  p_ssize;        /* copy of stack size (clicks) */
        size_t  p_rssize;       /* current resident set size in clicks */
        size_t  p_swrss;        /* resident set size before last swap */
        swblk_t p_swaddr;       /* disk address of u area when swapped */
        caddr_t p_wchan;        /* event process is awaiting */
        struct  text *p_textp;  /* pointer to text structure */
        struct  proc *p_link;   /* linked list of running processes */
        int     p_clktim;       /* time to alarm clock signal */
        struct  pte *p_p0br;    /* page table base P0BR */
        struct  proc *p_xlink;  /* linked list of procs sharing same text */
        short   p_faults;       /* faults in last second */
        short   p_aveflt;       /* average of p_faults into past */
        short   p_ndx;          /* proc index for memall (because of vfork) */
};

#ifdef  KERNEL
extern  struct proc proc[];     /* the proc table itself */

struct  proc *runq;             /* pointer to linked list of running processes */
#endif

/* stat codes */
#define SSLEEP  1               /* awaiting an event */
#define SWAIT   2               /* (abandoned state) */
#define SRUN    3               /* running */
#define SIDL    4               /* intermediate state in process creation */
#define SZOMB   5               /* intermediate state in process termination */
#define SSTOP   6               /* process being traced */

/* flag codes */
#define SLOAD   0x0001          /* in core */
#define SSYS    0x0002          /* swapper or pager process */
#define SLOCK   0x0004          /* process being swapped out */
#define SSWAP   0x0008          /* save area flag */
#define STRC    0x0010          /* process is being traced */
#define SWTED   0x0020          /* another tracing flag */
#define SULOCK  0x0040          /* user settable lock in core */
#define SPAGE   0x0080          /* process in page wait state */
#define SKEEP   0x0100          /* another flag to prevent swap out */
#define SDLYU   0x0200          /* delayed unlock of pages */
#define SWEXIT  0x0400          /* working on exiting */
#define SUNUSED 0x0800          /* used to be page out in progress */
#define SVFORK  0x1000          /* process resulted from vfork() */
#define SVFDONE 0x2000          /* another vfork flag */
#define SNOVM   0x4000          /* no vm, parent in a vfork() */
#define SPAGI   0x8000          /* init data space on demand, from inode */

/*
 * parallel proc structure
 * to replace part with times
 * to be passed to parent process
 * in ZOMBIE state.
 */
struct  xproc
{
        char    xp_stat;
        char    xp_slptime;
        short   xp_flag;
        short   xp_cpu;         /* cpu usage for scheduling */
        short   xp_time;        /* resident time for scheduling */
        char    xp_pri;         /* priority, negative is high */
        char    xp_nice;        /* nice for cpu usage */
        short   xp_sig;         /* signals pending to this process */
        short   xp_uid;         /* user id, used to direct tty signals */
        short   xp_pgrp;        /* name of process group leader */
        short   xp_pid;         /* unique process id */
        short   xp_ppid;        /* process id of parent */
        short   xp_xstat;       /* Exit status for wait */
        time_t  xp_utime;       /* user time, this proc */
        time_t  xp_stime;       /* system time, this proc */
};