4.3BSD - /usr/src/sys/h/proc.h

   1: /*
   2:  * Copyright (c) 1982, 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)proc.h	7.1 (Berkeley) 6/4/86
   7:  */
   8: 
   9: /*
  10:  * One structure allocated per active
  11:  * process. It contains all data needed
  12:  * about the process while the
  13:  * process may be swapped out.
  14:  * Other per process data (user.h)
  15:  * is swapped with the process.
  16:  */
  17: struct  proc {
  18:     struct  proc *p_link;   /* linked list of running processes */
  19:     struct  proc *p_rlink;
  20:     struct  proc *p_nxt;    /* linked list of allocated proc slots */
  21:     struct  proc **p_prev;      /* also zombies, and free proc's */
  22:     struct  pte *p_addr;    /* u-area kernel map address */
  23:     char    p_usrpri;   /* user-priority based on p_cpu and p_nice */
  24:     char    p_pri;      /* priority, negative is high */
  25:     char    p_cpu;      /* cpu usage for scheduling */
  26:     char    p_stat;
  27:     char    p_time;     /* resident time for scheduling */
  28:     char    p_nice;     /* nice for cpu usage */
  29:     char    p_slptime;  /* time since last block */
  30:     char    p_cursig;
  31:     int p_sig;      /* signals pending to this process */
  32:     int p_sigmask;  /* current signal mask */
  33:     int p_sigignore;    /* signals being ignored */
  34:     int p_sigcatch; /* signals being caught by user */
  35:     int p_flag;
  36:     uid_t   p_uid;      /* user id, used to direct tty signals */
  37:     short   p_pgrp;     /* name of process group leader */
  38:     short   p_pid;      /* unique process id */
  39:     short   p_ppid;     /* process id of parent */
  40:     u_short p_xstat;    /* Exit status for wait */
  41:     struct  rusage *p_ru;   /* mbuf holding exit information */
  42:     short   p_poip;     /* page outs in progress */
  43:     short   p_szpt;     /* copy of page table size */
  44:     size_t  p_tsize;    /* size of text (clicks) */
  45:     size_t  p_dsize;    /* size of data space (clicks) */
  46:     size_t  p_ssize;    /* copy of stack size (clicks) */
  47:     size_t  p_rssize;   /* current resident set size in clicks */
  48:     size_t  p_maxrss;   /* copy of u.u_limit[MAXRSS] */
  49:     size_t  p_swrss;    /* resident set size before last swap */
  50:     swblk_t p_swaddr;   /* disk address of u area when swapped */
  51:     caddr_t p_wchan;    /* event process is awaiting */
  52:     struct  text *p_textp;  /* pointer to text structure */
  53:     struct  pte *p_p0br;    /* page table base P0BR */
  54:     struct  proc *p_xlink;  /* linked list of procs sharing same text */
  55:     short   p_cpticks;  /* ticks of cpu time */
  56:     float   p_pctcpu;   /* %cpu for this process during p_time */
  57:     short   p_ndx;      /* proc index for memall (because of vfork) */
  58:     short   p_idhash;   /* hashed based on p_pid for kill+exit+... */
  59:     struct  proc *p_pptr;   /* pointer to process structure of parent */
  60:     struct  proc *p_cptr;   /* pointer to youngest living child */
  61:     struct  proc *p_osptr;  /* pointer to older sibling processes */
  62:     struct  proc *p_ysptr;  /* pointer to younger siblings */
  63:     struct  itimerval p_realtimer;
  64:     struct  quota *p_quota; /* quotas for this process */
  65: };
  66: 
  67: #define PIDHSZ      64
  68: #define PIDHASH(pid)    ((pid) & (PIDHSZ - 1))
  69: 
  70: #ifdef KERNEL
  71: short   pidhash[PIDHSZ];
  72: struct  proc *pfind();
  73: struct  proc *proc, *procNPROC; /* the proc table itself */
  74: struct  proc *freeproc, *zombproc, *allproc;
  75:             /* lists of procs in various states */
  76: int nproc;
  77: 
  78: #define NQS 32      /* 32 run queues */
  79: struct  prochd {
  80:     struct  proc *ph_link;  /* linked list of running processes */
  81:     struct  proc *ph_rlink;
  82: } qs[NQS];
  83: int whichqs;        /* bit mask summarizing non-empty qs's */
  84: #endif
  85: 
  86: /* stat codes */
  87: #define SSLEEP  1       /* awaiting an event */
  88: #define SWAIT   2       /* (abandoned state) */
  89: #define SRUN    3       /* running */
  90: #define SIDL    4       /* intermediate state in process creation */
  91: #define SZOMB   5       /* intermediate state in process termination */
  92: #define SSTOP   6       /* process being traced */
  93: 
  94: /* flag codes */
  95: #define SLOAD   0x0000001   /* in core */
  96: #define SSYS    0x0000002   /* swapper or pager process */
  97: #define SLOCK   0x0000004   /* process being swapped out */
  98: #define SSWAP   0x0000008   /* save area flag */
  99: #define STRC    0x0000010   /* process is being traced */
 100: #define SWTED   0x0000020   /* another tracing flag */
 101: #define SULOCK  0x0000040   /* user settable lock in core */
 102: #define SPAGE   0x0000080   /* process in page wait state */
 103: #define SKEEP   0x0000100   /* another flag to prevent swap out */
 104: #define SOMASK  0x0000200   /* restore old mask after taking signal */
 105: #define SWEXIT  0x0000400   /* working on exiting */
 106: #define SPHYSIO 0x0000800   /* doing physical i/o (bio.c) */
 107: #define SVFORK  0x0001000   /* process resulted from vfork() */
 108: #define SVFDONE 0x0002000   /* another vfork flag */
 109: #define SNOVM   0x0004000   /* no vm, parent in a vfork() */
 110: #define SPAGI   0x0008000   /* init data space on demand, from inode */
 111: #define SSEQL   0x0010000   /* user warned of sequential vm behavior */
 112: #define SUANOM  0x0020000   /* user warned of random vm behavior */
 113: #define STIMO   0x0040000   /* timing out during sleep */
 114: /* was SDETACH */
 115: #define SOUSIG  0x0100000   /* using old signal mechanism */
 116: #define SOWEUPC 0x0200000   /* owe process an addupc() call at next ast */
 117: #define SSEL    0x0400000   /* selecting; wakeup/waiting danger */
 118: #define SLOGIN  0x0800000   /* a login process (legit child of init) */
 119: #define SPTECHG 0x1000000   /* pte's for process have changed */

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Usage of this include