Mercurial > hg > CbC > CbC_xv6

annotate src/file.h @ 395:17e8a4bc06a7 default tip

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add macOS AR/RANLIB
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 14 Dec 2020 21:59:50 +0900
parents efef0767b1bc
children
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1 #ifndef FILE_STRUCT
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2 struct file {
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3 enum { FD_NONE, FD_PIPE, FD_INODE } type;
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4 int ref; // reference count
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5 char readable;
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6 char writable;
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7 struct pipe *pipe;
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8 struct inode *ip;
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9 uint off;
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10 };
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11
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12 #define FILE_STRUCT
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13 #endif
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14 // in-memory copy of an inode
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15
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16 #ifndef INODE_STRUCT
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17 struct inode {
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18 uint dev; // Device number
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19 uint inum; // Inode number
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20 int ref; // Reference count
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21 int flags; // I_BUSY, I_VALID
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22
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23 short type; // copy of disk inode
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24 short major;
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25 short minor;
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26 short nlink;
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27 uint size;
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28 uint addrs[NDIRECT+1];
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29 };
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30 #define INODE_STRUCT
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31 #endif
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32
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33 #define I_BUSY 0x1
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34 #define I_VALID 0x2
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37
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38 // table mapping major device number to
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39 // device functions
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40 struct devsw {
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41 int (*read) (struct inode*, char*, int);
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42 int (*write)(struct inode*, char*, int);
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43 };
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44
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45 struct cbc_devsw {
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46 __code (*read) (struct inode*, char*, int, __code (*)(int));
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47 //__code (*write)(struct inode*, char*, int, __code (*)(int));
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48 };
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49
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50 extern struct devsw devsw[];
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51 extern struct cbc_devsw cbc_devsw[];
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52
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53 #define CONSOLE 1