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Annotation of 43BSD/sys/h/text.h, revision 1.1.1.1

1.1       root        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:  *     @(#)text.h      7.1 (Berkeley) 6/4/86
                      7:  */
                      8: 
                      9: /*
                     10:  * Text structure.
                     11:  * One allocated per pure
                     12:  * procedure on swap device.
                     13:  * Manipulated by text.c
                     14:  */
                     15: #define        NXDAD   12              /* param.h:MAXTSIZ / vmparam.h:DMTEXT */
                     16: 
                     17: struct text
                     18: {
                     19:        struct  text *x_forw;   /* forward link in free list */
                     20:        struct  text **x_back;  /* backward link in free list */
                     21:        swblk_t x_daddr[NXDAD]; /* disk addresses of dmtext-page segments */
                     22:        swblk_t x_ptdaddr;      /* disk address of page table */
                     23:        size_t  x_size;         /* size (clicks) */
                     24:        struct proc *x_caddr;   /* ptr to linked proc, if loaded */
                     25:        struct inode *x_iptr;   /* inode of prototype */
                     26:        short   x_rssize;
                     27:        short   x_swrss;
                     28:        short   x_count;        /* reference count */
                     29:        short   x_ccount;       /* number of loaded references */
                     30:        char    x_flag;         /* traced, written flags */
                     31:        char    x_slptime;
                     32:        short   x_poip;         /* page out in progress count */
                     33: };
                     34: 
                     35: #ifdef KERNEL
                     36: struct text *text, *textNTEXT;
                     37: int    ntext;
                     38: #endif
                     39: 
                     40: #define        XTRC    0x01            /* Text may be written, exclusive use */
                     41: #define        XWRIT   0x02            /* Text written into, must swap out */
                     42: #define        XLOAD   0x04            /* Currently being read from file */
                     43: #define        XLOCK   0x08            /* Being swapped in or out */
                     44: #define        XWANT   0x10            /* Wanted for swapping */
                     45: #define        XPAGI   0x20            /* Page in on demand from inode */
                     46: #define        XUNUSED 0x40            /* unused since swapped out for cache */
                     47: 
                     48: /*
                     49:  * Text table statistics
                     50:  */
                     51: struct xstats {
                     52:        u_long  alloc;                  /* calls to xalloc */
                     53:        u_long  alloc_inuse;            /*      found in use/sticky */
                     54:        u_long  alloc_cachehit;         /*      found in cache */
                     55:        u_long  alloc_cacheflush;       /*      flushed cached text */
                     56:        u_long  alloc_unused;           /*      flushed unused cached text */
                     57:        u_long  free;                   /* calls to xfree */
                     58:        u_long  free_inuse;             /*      still in use/sticky */
                     59:        u_long  free_cache;             /*      placed in cache */
                     60:        u_long  free_cacheswap;         /*      swapped out to place in cache */
                     61: };

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