BSD 4_1_snap development

[unix-history] / sys / h / proc.h

/*      proc.h  4.8     81/04/23        */

/*
* 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
{
       struct  proc *p_link;   /* linked list of running processes */
       struct  proc *p_rlink;
       struct  pte *p_addr;    /* u-area kernel map address */
       char    p_usrpri;       /* user-priority based on p_cpu and p_nice */
       char    p_pri;          /* priority, negative is high */
       char    p_cpu;          /* cpu usage for scheduling */
       char    p_stat;
       char    p_time;         /* resident time for scheduling */
       char    p_nice;         /* nice for cpu usage */
       char    p_slptime;      /* time since last block */
       char    p_cursig;
       long    p_sig;          /* signals pending to this process */
       long    p_siga0;        /* low bit of 2 bit signal action */
       long    p_siga1;        /* high bit of 2 bit signal action */
#define p_ignsig p_siga0        /* ignored signal mask */
       int     p_flag;
       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_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_maxrss;       /* copy of u.u_limit[MAXRSS] */
       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 */
       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_cpticks;      /* ticks of cpu time */
       float   p_pctcpu;       /* %cpu for this process during p_time */
       short   p_ndx;          /* proc index for memall (because of vfork) */
       short   p_idhash;       /* hashed based on p_pid for kill+exit+... */
       struct  proc *p_pptr;   /* pointer to process structure of parent */
};

#define PIDHSZ          63
#define PIDHASH(pid)    ((pid) % PIDHSZ)

#ifdef KERNEL
short   pidhash[PIDHSZ];

struct  proc *pfind();
#endif

#ifdef  KERNEL
struct  proc *proc, *procNPROC; /* the proc table itself */
int     nproc;

#define NQS     32              /* 32 run queues */
struct  prochd {
       struct  proc *ph_link;  /* linked list of running processes */
       struct  proc *ph_rlink;
} qs[NQS];
int     whichqs;                /* bit mask summarizing non-empty qs's */
#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   0x000001        /* in core */
#define SSYS    0x000002        /* swapper or pager process */
#define SLOCK   0x000004        /* process being swapped out */
#define SSWAP   0x000008        /* save area flag */
#define STRC    0x000010        /* process is being traced */
#define SWTED   0x000020        /* another tracing flag */
#define SULOCK  0x000040        /* user settable lock in core */
#define SPAGE   0x000080        /* process in page wait state */
#define SKEEP   0x000100        /* another flag to prevent swap out */
#define SDLYU   0x000200        /* delayed unlock of pages */
#define SWEXIT  0x000400        /* working on exiting */
#define SPHYSIO 0x000800        /* doing physical i/o (bio.c) */
#define SVFORK  0x001000        /* process resulted from vfork() */
#define SVFDONE 0x002000        /* another vfork flag */
#define SNOVM   0x004000        /* no vm, parent in a vfork() */
#define SPAGI   0x008000        /* init data space on demand, from inode */
#define SSEQL   0x010000        /* user warned of sequential vm behavior */
#define SUANOM  0x020000        /* user warned of random vm behavior */
#define STIMO   0x040000        /* timing out during sleep */
#define SDETACH 0x080000        /* detached inherited by init */
#define SNUSIG  0x100000        /* using new signal mechanism */
#define SOWEUPC 0x200000        /* owe process an addupc() call at next ast */

/*
* parallel proc structure
* to replace part with times
* to be passed to parent process
* in ZOMBIE state.
*
* THIS SHOULD BE DONE WITH A union() CONSTRUCTION
*/
struct  xproc
{
       struct  proc *xp_link;
       struct  proc *xp_rlink;
       struct  pte *xp_addr;
       char    xp_usrpri;
       char    xp_pri;         /* priority, negative is high */
       char    xp_cpu;         /* cpu usage for scheduling */
       char    xp_stat;
       char    xp_time;        /* resident time for scheduling */
       char    xp_nice;        /* nice for cpu usage */
       char    xp_slptime;
       char    p_cursig;
       int     xp_sig;         /* signals pending to this process */
       int     xp_siga0;
       int     xp_siga1;
       int     xp_flag;
       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 */
       struct  vtimes xp_vm;
};