?? proc.h
字號(hào):
/* * 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_flag; char p_pri; /* priority, negative is high */ char p_time; /* resident time for scheduling */ char p_cpu; /* cpu usage for scheduling */ 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; /* address of swappable image */ short p_size; /* size of swappable image (clicks) */ 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 */};extern struct proc proc[]; /* the proc table itself *//* 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 01 /* in core */#define SSYS 02 /* scheduling process */#define SLOCK 04 /* process cannot be swapped */#define SSWAP 010 /* process is being swapped out */#define STRC 020 /* process is being traced */#define SWTED 040 /* another tracing flag */#define SULOCK 0100 /* user settable lock in core *//* * parallel proc structure * to replace part with times * to be passed to parent process * in ZOMBIE state. */struct xproc { char xp_stat; char xp_flag; char xp_pri; /* priority, negative is high */ char xp_time; /* resident time for scheduling */ char xp_cpu; /* cpu usage for scheduling */ 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 */};
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