43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* One structure allocated per active
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* process. It contains all data needed
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* about the process while the
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* process may be swapped out.
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* Other per process data (user.h)
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* is swapped with the process.
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*/
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struct proc
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{
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char p_stat;
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char p_flag;
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char p_pri; /* priority, negative is high */
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char p_sig; /* signal number sent to this process */
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char p_uid; /* user id, used to direct tty signals */
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char p_time; /* resident time for scheduling */
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char p_cpu; /* cpu usage for scheduling */
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char p_nice; /* nice for scheduling */
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int p_ttyp; /* controlling tty */
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int p_pid; /* unique process id */
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int p_ppid; /* process id of parent */
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int p_addr; /* address of swappable image */
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int p_size; /* size of swappable image (*64 bytes) */
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int p_wchan; /* event process is awaiting */
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int *p_textp; /* pointer to text structure */
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} proc[NPROC];
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/* stat codes */
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#define SSLEEP 1 /* sleeping on high priority */
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#define SWAIT 2 /* sleeping on low priority */
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#define SRUN 3 /* running */
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#define SIDL 4 /* intermediate state in process creation */
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#define SZOMB 5 /* intermediate state in process termination */
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#define SSTOP 6 /* process being traced */
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/* flag codes */
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#define SLOAD 01 /* in core */
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#define SSYS 02 /* scheduling process */
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#define SLOCK 04 /* process cannot be swapped */
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#define SSWAP 010 /* process is being swapped out */
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#define STRC 020 /* process is being traced */
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#define SWTED 040 /* another tracing flag */
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