?? systm.h
字號(hào):
/* * Random set of variables * used by more than one * routine. */char canonb[CANBSIZ]; /* buffer for erase and kill (#@) */int coremap[CMAPSIZ]; /* space for core allocation */int swapmap[SMAPSIZ]; /* space for swap allocation */int *rootdir; /* pointer to inode of root directory */int cputype; /* type of cpu =40, 45, or 70 */int execnt; /* number of processes in exec */int lbolt; /* time of day in 60th not in time */int time[2]; /* time in sec from 1970 */int tout[2]; /* time of day of next sleep *//* * The callout structure is for * a routine arranging * to be called by the clock interrupt * (clock.c) with a specified argument, * in a specified amount of time. * Used, for example, to time tab * delays on teletypes. */struct callo{ int c_time; /* incremental time */ int c_arg; /* argument to routine */ int (*c_func)(); /* routine */} callout[NCALL];/* * Mount structure. * One allocated on every mount. * Used to find the super block. */struct mount{ int m_dev; /* device mounted */ int *m_bufp; /* pointer to superblock */ int *m_inodp; /* pointer to mounted on inode */} mount[NMOUNT];int mpid; /* generic for unique process id's */char runin; /* scheduling flag */char runout; /* scheduling flag */char runrun; /* scheduling flag */char curpri; /* more scheduling */int maxmem; /* actual max memory per process */int *lks; /* pointer to clock device */int rootdev; /* dev of root see conf.c */int swapdev; /* dev of swap see conf.c */int swplo; /* block number of swap space */int nswap; /* size of swap space */int updlock; /* lock for sync */int rablock; /* block to be read ahead */char regloc[]; /* locs. of saved user registers (trap.c) */
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